(19)
(11)EP 4 037 856 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.10.2023 Bulletin 2023/41

(21)Application number: 20789693.7

(22)Date of filing:  07.09.2020
(51)International Patent Classification (IPC): 
B23B 29/034(2006.01)
(52)Cooperative Patent Classification (CPC):
B23B 29/03403; B23B 2260/02; B23B 2260/088
(86)International application number:
PCT/IL2020/050971
(87)International publication number:
WO 2021/064721 (08.04.2021 Gazette  2021/14)

(54)

TOOL HOLDER HAVING SIMULTANEOUS RADIALLY ADJUSTABLE INSERT CARTRIDGES AND ROTARY CUTTING TOOL

WERKZEUGHALTER MIT GLEICHZEITIG RADIAL VERSTELLBAREN EINSATZKASSETTEN UND ROTATIONSSCHNEIDWERKZEUG

PORTE-OUTIL AYANT DES CARTOUCHES D'INSERT RÉGLABLES RADIALEMENT SIMULTANÉMENT ET OUTIL DE COUPE ROTATIF


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 03.10.2019 US 201916591765

(43)Date of publication of application:
10.08.2022 Bulletin 2022/32

(73)Proprietor: Iscar Ltd.
24959 Tefen (IL)

(72)Inventors:
  • ASHQAR, Mark
    25170 Fasuta (IL)
  • COHEN, Nir
    22805 Kibbutz Saar (IL)

(74)Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB 
Siebertstraße 3
81675 München
81675 München (DE)


(56)References cited: : 
DE-U- 7 327 727
US-A- 1 777 265
US-A- 2 630 027
SU-A1- 694 288
US-A- 1 870 350
US-A- 4 632 609
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    FIELD OF THE INVENTION



    [0001] The subject matter of the present application relates to rotary cutting tools having a tool holder having a plurality of insert cartridges retained thereon, in general, and to such cutting tools with an arrangement for simultaneously adjusting the radial position of the insert cartridges, in particular.

    BACKGROUND OF THE INVENTION



    [0002] Rotary cutting tools, having a plurality of peripheral insert cartridges with a cutting insert retained in a circumferentially disposed insert pocket formed on the insert cartridge, can be provided with an adjustment mechanism for adjusting the radial position of any of said insert cartridges and thereby the respective cutting insert seated thereon. Examples of such rotary cutting tools are disclosed in, for example, GB 328803A and WO 2012/101319.

    [0003] US 1 870 350 A discloses:
    a boring tool defining opposite axially forward and rearward directions, and opposite rotational preceding and succeeding directions with the preceding direction being the cutting direction, the tool comprising:

    a body comprising a forwardly disposed forward body portion, the forward body portion comprising a generally forward facing body forward surface and a body peripheral surface which extends about the central axis and bounds the body forward surface, the body forward surface comprising a plurality of body engagement surfaces;

    an adjustment sleeve having a sleeve central axis, the adjustment sleeve comprising:

    opposite forward and rearward sleeve end surfaces and a sleeve peripheral surface extending therebetween;

    a sleeve through hole comprising a sleeve through hole wall surface which extends about the sleeve central axis and connects the forward and rearward sleeve end surfaces; and

    a sleeve adjustment groove recessed in the forward sleeve end surface, the sleeve adjustment grooves extending with decreasing distance from the sleeve central axis in a rotational sleeve direction defined by one of the preceding and succeeding directions; and

    a plurality of cutting elements, each cutting element having a cutting edge and being displaceable in opposite inward and outward adjustment directions;

    wherein the adjustment sleeve is circumferentially disposed about the body, with the sleeve through hole wall surface facing the body peripheral surface so that the adjustment sleeve is rotationally displaceable with respect to the forward body portion; and

    the tool is adjustable between an inner adjusted position and an outer adjusted position upon rotation of the adjustment sleeve about the holder axis in a rotational sleeve direction;

    wherein in the inner adjusted position the adjustment sleeve is located at a first angular position relative to the holder central axis; and

    each cutting edge is spaced apart from the holder central axis by a respective first radial pocket distance; and

    in the outer adjusted position the adjustment sleeve is located at a second angular position relative to holder central axis; and

    each cutting edge is spaced apart from the holder central axis by a respective second radial pocket distance, the second radial pocket distance being greater than the first radial pocket distance.



    [0004] It is an object of the subject matter of the present application to provide a rotary cutting tool with an adjustment mechanism for adjusting the radial position of the cutting inserts and thus the cutting diameter.

    SUMMARY OF THE INVENTION



    [0005] In accordance with the invention a tool holder is provided having the features of claim 1. Additional optional features are defined by the dependent claims.

    BRIEF DESCRIPTION OF THE FIGURES



    [0006] For a better understanding of the present application and to show how the same may be carried out in practice, reference will now be made to the accompanying drawings, in which:

    Fig. 1 is a perspective view of a rotary cutting tool;

    Fig. 2 is an exploded perspective view of the rotary cutting tool shown in Fig. 1;

    Fig. 3 is a side view of a tool holder shown in Figs. 1 and 2;

    Fig. 4 is a front view of the tool holder shown in Fig. 3;

    Fig. 5 is a front view of an adjustment sleeve shown in Figs. 1 and 2;

    Fig. 6 is a perspective view of an insert cartridge shown in Figs. 1 and 2;

    Fig. 7 is a top view of the insert cartridge shown in Fig. 6;

    Fig. 8 is a bottom view of the insert cartridge shown in Fig. 6;

    Fig. 9 is a top view of a clamping plate shown in Figs. 1 and 2;

    Fig. 10 is a bottom view of the clamping plate shown in Fig. 9;

    Fig. 11 is a perspective view of a plate retaining screw shown in Figs. 1 and 2;

    Fig. 12 is a cross sectional view taken in a radial plane when the tool holder is in an inner adjusted position, with the contour of one insert cartridge superimposed thereon; and

    Fig. 13 is an analogous view shown in Fig. 12, when the tool holder is in a first outer adjusted position; and

    Fig. 14 is an analogous view shown in Fig. 12, when the tool holder is in a second outer adjusted position, which is further outward than the first outer adjusted position.



    [0007] It will be appreciated that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity, or several physical components may be included in one functional block or element. Further, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.

    DETAILED DESCRIPTION OF THE INVENTION



    [0008] In the following description, various aspects of the subject matter of the present application will be described. For purposes of explanation, specific configurations and details are set forth in sufficient detail to provide a thorough understanding of the subject matter of the present application. However, it will also be apparent to one skilled in the art that the subject matter of the present application can be practiced without the specific configurations and details presented herein.

    [0009] Attention is first drawn to Figs. 1 and 2 showing a rotary cutting tool 20, depicting an aspect of the present application. In this non-limiting example shown in the drawings, the rotary cutting tool 20 is a rotary boring tool, designed to increase the diameter of pre-existing holes. However, the subject matter of the present application is not restricted only to rotary boring tool and could also be applicable to, for example but not limited to, reaming tools. The rotary cutting tool 20 includes a tool holder 22 which has a holder body 24 and a plurality of insert cartridges 26. The plurality of insert cartridges 26 are circumferentially spaced apart. In this non-limiting example shown in the drawings, the tool holder 22 has exactly three insert cartridges 26. The insert cartridges 26 are releasably attached to the holder body 24. The rotary cutting tool 20 further includes a plurality of cutting inserts 28. Each cutting insert 28 has a circumferential cutting edge 29. Each cutting insert 28 is releasably retained in an insert pocket 30 of a respective insert cartridge 26. The rotary cutting tool 20 has a cutting diameter which defines the diameter of the hole in the workpiece after cutting (e.g. boring) has been performed. The tool holder 22 is adjustable between an inner adjusted position and an outer adjusted position. The inner adjusted position can correspond to a minimum cutting diameter. The outer adjusted position can correspond to a maximum cutting diameter.

    [0010] Attention is again drawn Figs. 1 and 2 also showing the tool holder 22, depicting another aspect of the present application. The tool holder 22 is configured to rotate about a holder central axis B. The holder central axis B defines opposite axially forward and rearward directions DF, DR. The holder central axis B also defines rotational preceding and succeeding directions DP, DS. The preceding direction DP is the cutting direction of the rotary cutting tool 20.

    [0011] It should also be noted that use of the terms "forward" and "rearward" throughout the description and claims refer to a relative position in a direction of the holder central axis B towards the left and right, respectively, in Fig. 3. In the present disclosure, "forward" is associated with the cutting end of the rotary cutting tool 20. It should also further be noted that use of the terms "axial" and "radial" throughout the description and claims are with respect to the holder central axis B, unless otherwise stated.

    [0012] Reference is now made to Fig. 3. The tool holder 22 includes a holder body 24. The holder body 24 includes a forwardly disposed forward body portion 32 and a rearwardly disposed spindle portion 34. The spindle portion 34 is designed to receive torque from the CNC machine in order to rotate the tool holder 22. The forward body portion 32 includes a forward facing body forward surface 36 and a body peripheral surface 38. In accordance with some embodiments of the subject matter of the present application, the body forward surface 36 can be oriented perpendicular to the holder central axis B.

    [0013] The body peripheral surface 38 extends about the holder central axis B and bounds the body forward surface 36. In accordance with some embodiments of the subject matter of the present application, the body peripheral surface 38 can be defined by an imaginary outer body cylinder COB which is co-axial with the tool holder 22 and which has an outer body diameter DOB.

    [0014] Referring to Fig. 4, the forward body portion 32 can include a body threaded hole 40 recessed in the body forward surface 36. The body threaded hole 40 is designed to threadingly receive a retaining screw which belongs to a clamping mechanism, and is discussed further on in the description. In accordance with some embodiments of the subject matter of the present application, the body threaded hole 40 can extend along the holder central axis B.

    [0015] Referring again to Fig. 4 and also seen in Fig. 2, the body forward surface 36 includes a plurality of body engagement surfaces 42. The plurality of body engagement surfaces 42 are circumferentially spaced part. The plurality of body engagement surfaces 42 are designed to engage corresponding rear cartridge surfaces 66 on the insert cartridges 26, and are discussed further on in the description. The number of body engagement surfaces 42 corresponds to the number of insert cartridges 26. While in Fig. 4, the body engagement surfaces 42 are identical to one another, in some embodiments they may differ from one another.

    [0016] Attention is now brought to Fig. 5 as well as Fig. 2. The tool holder 22 includes an adjustment sleeve 44. The adjustment sleeve 44 has a sleeve central axis A. The adjustment sleeve 44 includes opposite forward and rearward sleeve end surfaces 46, 48. In accordance with some embodiments of the subject matter of the present application, the forward and rearward sleeve end surfaces 46, 48 can be oriented perpendicular to the sleeve central axis A.

    [0017] The adjustment sleeve 44 further includes a sleeve peripheral surface 50 which extends between the forward and rearward sleeve end surfaces 46, 48. The sleeve peripheral surface 50 extends about the sleeve central axis A. In accordance with some embodiments of the subject matter of the present application, the sleeve peripheral surface 50 can be defined by an imaginary outer sleeve cylinder COS which has the sleeve central axis A as its axis and which has an outer sleeve diameter DOS.

    [0018] The adjustment sleeve 44 includes a sleeve through hole 52. The sleeve through hole 52 includes a sleeve through hole wall surface 54 which extends about the sleeve central axis A. Stated differently, the sleeve through hole 52 extends along the sleeve central axis A. The sleeve through hole wall surface 54 connects the forward and rearward sleeve end surfaces 46, 48. That is to say, the sleeve through hole 52 opens out to the forward and rearward sleeve end surfaces 46, 48.

    [0019] In accordance with some embodiments of the subject matter of the present application, the sleeve through hole wall surface 54 can be defined by an imaginary inner sleeve cylinder CIS which has the sleeve central axis A as its axis and which has an inner sleeve diameter DIS. The inner and outer sleeve cylinders CIS, COS can be co-axial (i.e. share the sleeve central axis A as their axes). The inner sleeve diameter DIS can be greater than 70% of the outer sleeve diameter DOS.

    [0020] The adjustment sleeve 44 is circumferentially disposed about the holder body 24, with the sleeve through hole wall surface 54 facing the body peripheral surface 38. The adjustment sleeve 44 is rotationally displaceable with respect to the forward body portion 32. That is to say, the adjustment sleeve 44 can be rotated relative to the forward body portion 32 (clearly, the inner sleeve diameter DIS is slightly greater than the outer body diameter DOB so clearance is provided to allow rotation of the adjustment sleeve 44). In such a configuration, the adjustment sleeve 44 and the tool holder 22 are co-axial. Moreover, generally speaking, the forward sleeve surface 46 can be level with the body forward surface 36 in the axial direction when the rotary cutting tool 20 is assembled (see Fig. 1).

    [0021] Referring back to Figs. 1 and 2, in accordance with some embodiments of the subject matter of the present application, the adjustment sleeve 44 can include a sleeve threaded through hole 56 opening out to the sleeve through hole wall surface 54 and the sleeve peripheral surface 50. Generally speaking, the sleeve threaded through hole 56 extends in a radial direction relative to the sleeve central axis A. As shown in Fig. 3, the forward body portion 32 can include an annular body securing groove 58 recessed in the body peripheral surface 38 and extending about the holder central axis B. As shown in Fig. 1, a securing screw 60 can be threadingly engaged with the sleeve threaded through hole 56 and also located in the body securing groove 58. The securing screw 60 does not firmly abut the body securing groove 58. In this configuration the adjustment sleeve 44 is releasably attached to the body holder 24 while allowing the adjustment sleeve 44 to be rotated.

    [0022] As best seen in Fig. 5, the adjustment sleeve 44 includes at least one sleeve adjustment groove 62 recessed in the forward sleeve end surface 46. The at least one sleeve adjustment groove 62 extends about the sleeve central axis A. Each sleeve adjustment groove 62 includes radially inwardly and outwardly facing groove wall surface 63a, 63b that oppose each other in the widthwise direction of the sleeve adjustment groove 62. In any axial plane containing the holder central axis (B) and intersecting the at least one sleeve adjustment groove 62, the radially inwardly facing groove wall surface 63a is further from the holder central axis B than the radially outwardly facing groove wall surface 63b. Any and all the sleeve adjustment grooves 62 extend with decreasing distance from the sleeve central axis A in a rotational sleeve direction DRS defined by one of the preceding and succeeding directions DP, DS. In accordance with some embodiments of the subject matter of the present application, the rotational sleeve direction DRS is defined by the preceding direction DP and is also the cutting direction of the rotary cutting tool 20. Each sleeve adjustment groove 62 can intersect at least one of the sleeve through hole wall surface 54 and the sleeve peripheral surface 50. More specifically, the sleeve adjustment groove 62 can intersect the sleeve through hole wall surface 54 at a groove inner opening 62a and the sleeve adjustment groove 62 can intersect the sleeve peripheral surface 50 at a groove outer opening 62b. The groove inner opening 62a is radially nearer the holder central axis B than the groove outer opening 62b.

    [0023] In accordance with some embodiments of the subject matter of the present application, each sleeve adjustment groove 62 can extend along a spiral S. The spiral S has a spiral center SC and a pitch angle δ. The pitch angle δ defines the magnitude of radial adjustment of the insert cartridges 26 for a pre-determined degree of rotation of the adjustment sleeve 44. The lower the value of the pitch angle δ, the finer radial adjustment of the insert cartridges 26. Each spiral S can be an Archimedean spiral which has a constant separation distance SD between successive turns. The pitch angle δ of each spiral S can be less than 10°. It should be understood that use of the terms "pitch angle" throughout the description and claims refer to the angle the spiral makes with circles centered at the spiral center SC.

    [0024] In accordance with some embodiments of the subject matter of the present application, the adjustment sleeve 44 can include exactly one sleeve adjustment groove 62. The exactly one sleeve adjustment groove 62 can extend continuously (i.e. uninterruptedly) about the spiral center SC. The spiral center SC can be contained at the holder central axis B. The exactly one sleeve adjustment groove 62 can extend about the sleeve axis A between one and two turns (where one turn is equal to 360 degrees).

    [0025] Reference is now made to Figs. 6 to 8 showing one of the plurality of insert cartridges 26. Each insert cartridge 26 includes opposite cartridge forward and rearward surfaces 64, 66. Each insert cartridge 26 further includes a cartridge peripheral surface 68 which extends between the cartridge forward and rearward surfaces 64, 66. The insert cartridge 26 also includes an insert pocket 30, for releasably retaining a respective cutting insert 28 therein. The insert pocket 30 opens out to the cartridge forward surface 64 and cartridge peripheral surface 68. When the rotary cutting tool 20 is assembled, the insert pocket 30 is disposed at the circumference of the tool holder 22. Additionally, the insert pocket 30 is disposed at a rotationally preceding portion of the insert cartridge 26.

    [0026] In accordance with some embodiments of the subject matter of the present application, the insert cartridge 26 can include a cartridge pin recess 70 recessed in the cartridge forward surface 64. The cartridge pin recess 70 is designed to receive a corresponding portion (e.g. pin) of a clamping member (e.g., plate) belonging to a clamping mechanism and is discussed further on in the description. The cartridge pin recess 70 can be a blind hole. Preferably, the insert cartridge 26 can include a clamping pocket 71, recessed at least partially in the cartridge forward surface 64. The cartridge pin recess 70 can be located at the clamping pocket 71. The cartridge pin recess 70 can be elongated to allow the insert cartridge 26 to be freely displaced even though the pin of a clamping member (for example) is still located therein.

    [0027] The cartridge rearward surface 66 includes a cartridge engagement surface 72. The shape of the cartridge engagement surface 72 corresponds to the shape of a respective body engagement surface 42. The cartridge engagement surface 72 is slidingly displaceable with respect to the respective body engagement surface 42. Moreover, the cartridge engagement surface 72 is mutually engaged with the respective body engagement surface 42 so that the insert cartridge 26 is displaceable in opposite inward and outward adjustment directions DI, DO. In accordance with some embodiments of the subject matter of the present application, the tool holder 22 is configured so that a displacement of any insert cartridge 26 in the inward and outward adjustment directions DI, DO results in the insert pocket 30, and in particular, the cutting edge 29 being displaced in a radial direction. That is to say, in a view along the holder central axis B, the inward and outward adjustment directions DI, DO are parallel to a radial line intersecting the holder central axis B and the cutting edge 29. However, in the embodiment shown, the inward outward adjustment directions DI, DO neither pass through nor intersect the holder central axis B and thus are skew to the holder central axis B.

    [0028] In accordance with some embodiments of the subject matter of the present application, the tool holder 22 can include at least one engagement recess 74 recessed in one or both of the cartridge engagement surface 72 and the respective body engagement surface 42. The tool holder 22 additionally can include at least one engagement projection 76 projecting from one or both of the cartridge engagement surface 72 and the respective body engagement surface 42. Stated differently, each body engagement surface 42 can include at least one linear engagement recess 74 and/or at least one linear engagement projection 76 and each cartridge engagement surface 72 can include at least one linear engagement recess 74 and/or at least one linear engagement projection 76.

    [0029] The at least one engagement recess 74 can extend in a straight (i.e. linear) manner. The at least one engagement projection 76 can extend in a straight (linear) manner. The at least one engagement projection 76 and/or the at least one engagement recess 74 provided at each body engagement surface 42 extends in the inward and outward adjustment directions DI, DO. The at least one engagement projection 76 and/or the at least one engagement recess 74 located at each body engagement surface 42 can extend to the body peripheral surface 38. The at least one engagement projection 76 can be engaged to the at least one engagement recess 74. It is noted that such a configuration allows movement of the insert cartridge 26 only in the inward and outward adjustment directions DI, DO.

    [0030] In accordance with some embodiments of the subject matter of the present application, the tool holder 22 can include exactly one engagement recess 74 recessed in one of the cartridge engagement surface 72 and the respective body engagement surface 42. The tool holder 22 additionally can include exactly one engagement projection 76 projecting from the other one of the cartridge engagement surface 72 and the respective body engagement surface 42.

    [0031] In accordance with some other embodiments of the subject matter of the present application, the at least one linear engagement recess 74 can include a plurality of engagement recesses 74 which are parallel with each other. The at least one linear engagement projection 76 can include a plurality of engagement projections 76 which are parallel with each other.

    [0032] In the figures, both the body engagement surface 44 and the cartridge engagement surface 72 are provided with linear engagement recesses 74 alternating with linear engagement projections 76, and the two surfaces 42, 72 engage one another in a complementary manner with the engagement projections 76 of each occupying the engagement recesses 74 of the other. Each pair of linear engagement projections 76 is connected by a respective linear engagement recess 74. Thus, a serrated engagement can be formed between the cartridge engagement surface 72 and the respective body engagement surface 42, when the plurality of engagement projections 76 engage the plurality of engagement recesses 74.

    [0033] Each insert cartridge 26 further includes at least one cartridge pin 78. The at least one cartridge pin 78 projects from the cartridge rearward surface 66. In accordance with some embodiments of the subject matter of the present application, each of the insert cartridges 26 can have a different number of cartridge pins 78 thereon. Referring to Figs. 12-14, in this non-limiting example, two of the insert cartridges 26 have three cartridge pins 78 and one of the insert cartridges 26 has four cartridge pins 78. Moreover, the cartridge pins 78 projecting from the cartridge rearward surface 66 of one cartridge 26 may do so at locations different from those of other cartridges. Thus, the plurality of insert cartridge 26 may not be not identical to one another. For the configuration with the adjustment sleeve 44 having exactly one sleeve adjustment groove 62, this allows all the insert cartridges 26 to be located at the same radial distance from the holder central axis B.

    [0034] For each insert cartridge 26, at least one of the cartridge pins 78 is located in a respective one of the sleeve adjustment grooves 62, thereby defining an at least one active cartridge pin 78a. The purpose of the active cartridge pin 78a is to provide an engagement with the engagement projection 76 which allows urging of the insert cartridge 26 in the inward and outward adjustment directions DI, DO, upon rotation of the adjustment sleeve 44 relative to the holder body's forward body portion 32. It is noted that the inward and outward adjustment directions DI, DO are non-perpendicular to an axial pin half-plane PP which contains the holder central axis B and intersects the at least one active cartridge pin 78a. Otherwise, displacement of the insert cartridge 26 would be prevented.

    [0035] In the configuration where each sleeve adjustment groove 62 intersects at least one of the sleeve through hole wall surface 54 and the sleeve peripheral surface 50, a cartridge pin 78 can be located partly in the respective sleeve adjustment groove 62 and partly not located in the respective sleeve adjustment groove 62 (i.e. by extending beyond the groove inner opening 62a or the groove outer opening 62b). It is noted however that such a cartridge pin 78 is not defined as an active cartridge pin 78a.

    [0036] In accordance with some embodiments of the subject matter of the present application, for at least one insert cartridge 26, two cartridge pins 78 are located in a respective one of the sleeve adjustment grooves 62 defining two active cartridge pins 78a.

    [0037] In accordance with some embodiments of the subject matter of the present application, each insert cartridge 26 can include a plurality of cartridge pins 78. For each insert cartridge 26, the plurality of cartridge pins 78 can be arranged in a linear manner, having the same linear direction as the at least one linear engagement recess 74 and/or the at least one linear engagement projection 76 located at the cartridge engagement surface 72. In other words, the plurality of cartridge pins 78 extend in a direction parallel to the at least one linear engagement recess 74 and/or the at least one linear engagement projection 76 located at the cartridge engagement surface 72. Each of the plurality of linearly arranged cartridge pins 78 can be spaced apart from its neighboring pins by a pin distance PD. Generally speaking, the pin distance PD can be equal to the separation distance SD.

    [0038] In accordance with some embodiments of the subject matter of the present application, for each insert cartridge 26, at least one of the cartridge pins 78 may be not located in any of the sleeve adjustment grooves 62, thereby defining at least one non-active cartridge pin 78b. In accordance with the discussion on active cartridge pins 78a above, a cartridge pin 78 which is located partly in the respective sleeve adjustment groove 62 and partly not located in the respective sleeve adjustment groove 62 is defined as a non-active cartridge pin 78b. Thus, in any given position of the tool holder 22 (and at any given time), each cartridge pin 26 is either active or non-active, but is not both or neither.

    [0039] Referring to Fig. 4, each of the body engagement surfaces 42 can have an associated pin storage channel 80 recessed in the body forward surface 36. Thus, the forward body portion 32 can include a plurality of cartridge pin storage channels 80 recessed in the body forward surface 36. The number of cartridge pin storage channels 80 corresponds to the number of body engagement surfaces 42, and thus to the number of insert cartridges 26. In accordance with some embodiments of the subject matter of the present application, each cartridge pin storage channel 80 can be arranged in a linear manner, having the same linear direction as the at least one linear engagement recess 74 and/or the at least one linear engagement projection 76 is located at the body engagement surface 42. In other words, each pin storage channel 80 extends in a direction parallel to the linear engagement recess 74 or the linear engagement projection 76 of the associated body engagement surface 42. The purpose of the cartridge pin storage channels 80 is described later in the description.

    [0040] Attention is drawn to Fig. 12, showing the tool holder 22 in the inner adjusted position. In the inner adjusted position, the adjustment sleeve 44 is located at a first angular position relative to the holder central axis B. Each insert pocket 30 is spaced apart from the holder central axis B by a respective first radial pocket distance R1. In accordance with some embodiments of the subject matter of the present application, in the inner adjusted position, for at least one insert cartridge 26, any non-active cartridge pins 78b which are located radially inwards from the at least one active cartridge pin 78a can be located in one of the cartridge pin storage channels 80.

    [0041] In accordance with some embodiments of the subject matter of the present application, in any of the adjusted positions of the tool holder 22 (e.g., in either the inner or outer adjusted positions), the plurality of insert cartridges 26 can be axially clamped to the holder body 24 by a clamping arrangement 82.

    [0042] In accordance with some embodiments of the subject matter of the present application, the clamping arrangement 82 can include a clamping plate 84. The clamping plate 84 can include opposite plate forward and rearward surfaces 86, 88 and a plate peripheral surface 90 extending therebetween.

    [0043] The clamping plate 84 can include a plate through hole 92. The plate through hole 92 can open out to the plate forward and rearward surfaces 86, 88. The clamping plate 84 can include a plurality of plate clamping portions 93. The number of clamping portions corresponds to the number of insert cartridges 26. In this non-limiting example shown in the drawings, the clamping plate 84 has a triangular shape with three plate clamping portions 93.

    [0044] The clamping plate 84 can be releasably attached to the tool holder 22 by a plate retaining screw 94. The plate retaining screw 94 can include a screw lower threaded portion 96. The plate retaining screw 94 can be located in the plate through hole 92 with the screw lower threaded portion 96 threadingly engaged with the body threaded hole 40. Each plate clamping portion 93 can clampingly engage a respective insert cartridge 26 to the holder body 24.

    [0045] In accordance with some embodiments of the subject matter of the present application, the plate through hole 92 can include a plate through hole threaded portion 98. The plate retaining screw 94 can include a screw upper threaded portion 100. The screw lower threaded portion 96 can be of opposite helical direction to the screw upper threaded portion 100. The screw upper threaded portion 100 can be threadingly engaged with the plate through hole threaded portion 98. In such a configuration there is no conical countersink (not shown) for receiving the head of the plate retaining screw 94. This is advantageous in a small rotary cutting tools 20 having a correspondingly small clamping plate 84, given limited space for a conical countersink.

    [0046] In accordance with some embodiments of the subject matter of the present application, the clamping plate 84 can include a plurality of plate pins 102 which project from the plate rearward surface 88. The number of plate pins 102 corresponds to the number of insert cartridges 26. For each insert cartridge 26, a respective plate pin 102 can be located in the cartridge pin recess 70. This prevents the insert cartridges 26 from falling from the tool holder 22 when adjusting the position of the tool holder 22.

    [0047] Alternatively, in accordance with some other embodiments of the subject matter of the present application, the clamping arrangement 82 can include a plurality of clamping screws with each insert cartridge 26 being individually axially clamped to the holder body 24 by a respective clamping screw without a clamping plate (not shown).

    [0048] Adjustment of the tool holder 22 from the inner adjusted position to the outer adjusted position is accomplished by performing the following steps. In accordance with some embodiments of the subject matter of the present application, the axially clamped plurality of insert cartridges 26 are unclamped sufficiently to allow their displacement in the inward and outward adjustment directions DI, DO. In this non-limiting example shown in the drawings, this is accomplished by partially unscrewing the plate retaining screw 94. Alternatively, for the configuration described above that includes a plurality of clamping screws, each clamping screw is individually partially unscrewed. The adjustment sleeve 44 is rotated about the holder central axis B in the rotational sleeve direction DRS. As the adjustment sleeve 44 is rotated, the outwardly facing groove wall surface 63b initially abuts the at least one active cartridge pin 78a. Upon further subsequent rotation, by virtue of the sleeve adjustment grooves 62 extending with decreasing distance from the sleeve central axis A in the rotational sleeve direction DRS, the outwardly facing groove wall surface 63b applies a radial adjustment force F on the at least one active cartridge pin 78a on each insert cartridge 28 in the radially outward direction. The adjustment force simultaneously urges the insert cartridges 26 to be displaced in the outward adjustment direction DO.

    [0049] It is noted that, in accordance with some embodiments of the subject matter of the present application, for some insert cartridges 26, during rotation of the adjustment sleeve 44 in the rotational sleeve direction DRS, one of the active cartridge pins 78a can "exit" a respective one of the sleeve adjustment grooves 62 via the groove outer opening 62b. In such case, the active cartridge pin 78a is no longer located in a respective one of the sleeve adjustment grooves 62 and becomes a non-active cartridge pin 78b. Likewise, for some insert cartridges 26, one of the non-active cartridge pins 78b can "enter" a respective one of the sleeve adjustment grooves 62 via the groove inner opening 62a. Thus, the non-active cartridge pin 78b is located in a respective one of the sleeve adjustment grooves 62 and becomes an active cartridge pin 78a. It is noted that the for each full turn of the adjustment sleeve 44 (i.e. turn of 360°), one active cartridge pin 78a can become a non-active cartridge pin 78b and one non-active cartridge pin 78b can become an active cartridge pin 78a. Accordingly, in the configuration with a plurality of cartridge pins, and provided that the separation distance SD corresponds to the pin distance PD, the adjustment sleeve 44 can be fully turned (i.e. turned 360°) N times where N equals the number of cartridge pins on the insert cartridge 26. Advantageously, this increases the maximum cutting diameter.

    [0050] Attention is drawn to Figs. 13 and 14, showing the tool holder 22 in two outer adjusted positions of the tool holder 22. In the outer adjusted position, the adjustment sleeve 44 is rotated by a rotational angle α relative to the first angular position.

    [0051] In the outer adjusted position shown in Fig. 13, the rotational angle α is equal to 135° (i.e. less than half a turn). In the outer adjusted position shown in Fig. 14, the rotational angle α is equal to 720° (i.e. two turns). The adjustment sleeve 44 is located at a second angular position relative to holder central axis B. It is noted, as shown in Fig. 14, that when the adjustment sleeve 44 is rotated a complete full exact turn (i.e. 360°), or any multiple thereof, the first angular position and the second angular position are the same. Otherwise, as shown in Fig. 13, the first angular position and the second angular position are different. However, in both Fig. 13 and Fig. 14, the adjustment sleeve 44 is considered to be rotationally offset from its inner adjusted position (in Fig. 14, by 720°).

    [0052] Each insert pocket 30 is spaced apart from the holder central axis B by a respective second radial pocket distance R2. The second radial pocket distance R2 is greater than the first radial pocket distance R1, for each insert cartridge 26.

    [0053] In accordance with some embodiments of the subject matter of the present application, as shown in Fig. 14, for at least one insert cartridge 26, at least one non-active cartridge pin 78b can be located radially outwards from the at least one active cartridge pin 78a.

    [0054] In accordance with some embodiments of the subject matter of the present application, in the inner and outer adjusted positions, different cartridge pins 78 can define the at least one active cartridge pin 78a, for at least some of the insert cartridges 26.

    [0055] Adjustment of the tool holder 22 from the outer adjusted position to the inner adjusted position is accomplished by performing the reverse steps. The adjustment sleeve 44 is rotated about the holder central axis B relative to the holder body's forward body portion 32 in a rotational direction opposite the rotational sleeve direction DRS. The inwardly facing groove wall surface 63a initially abuts and then applies a radial adjustment force F to the at least one active cartridge pin 78a on each insert cartridge 28 in the inward direction. The adjustment force simultaneously urges the insert cartridges 26 to be displaced in the inward adjustment direction DO, thereby displacing the insert pockets 30 so that they are once again spaced apart from the holder central axis B by the first radial pocket distance R1.

    [0056] Although the subject matter of the present application has been described to a certain degree of particularity, it should be understood that various alterations and modifications could be made without departing from the scope of the invention as hereinafter claimed.


    Claims

    1. A tool holder (22) configured for rotation about a holder central axis (B) defining opposite axially forward and rearward directions (DF, DR), and opposite rotational preceding and succeeding directions (DP, DS) with the preceding direction (DP) being the cutting direction, the tool holder (22) comprising:

    a holder body (24) comprising a forwardly disposed forward body portion (32), the forward body portion (32) comprising a generally forward facing body forward surface (36) and a body peripheral surface (38) which extends about the holder central axis (B) and bounds the body forward surface (36), the body forward surface (36) comprising a plurality of body engagement surfaces (42);

    an adjustment sleeve (44) having a sleeve central axis (A), the adjustment sleeve (44) comprising:

    opposite forward and rearward sleeve end surfaces (46, 48) and a sleeve peripheral surface (50) extending therebetween;

    a sleeve through hole (52) comprising a sleeve through hole wall surface (54) which extends about the sleeve central axis (A) and connects the forward and rearward sleeve end surfaces (46, 48); and

    at least one sleeve adjustment groove (62) recessed in the forward sleeve end surface (46), any and all of the sleeve adjustment grooves (62) extending with decreasing distance from the sleeve central axis (A) in a rotational sleeve direction (DRS) defined by one of the preceding and succeeding directions (DP, DS); and

    a plurality of insert cartridges (26), each insert cartridge (26) comprising:

    an insert pocket (30);

    a rearward facing cartridge rearward surface (66) comprising a cartridge engagement surface (72) which is mutually engaged with a respective body engagement surface (42) so that the insert cartridge (26) is displaceable in opposite inward and outward adjustment directions (DI, DO); and

    at least one cartridge pin (78) projecting from the cartridge rearward surface (66),

    wherein:

    the adjustment sleeve (44) is circumferentially disposed about the body holder (24), with the sleeve through hole wall surface (54) facing the body peripheral surface (38) so that the adjustment sleeve (44) is rotationally displaceable with respect to the forward body portion (32); and

    at least one of the cartridge pins (78) is located in a respective one of the sleeve adjustment grooves (62) defining at least one active cartridge pin (78a); and:

    the tool holder (22) is adjustable between an inner adjusted position and an outer adjusted position upon rotation of the adjustment sleeve (44) about the holder axis (B) in a rotational sleeve direction (DRS); wherein in the inner adjusted position:

    the adjustment sleeve (44) is located at a first angular position relative to the holder central axis (B); and

    each insert pocket (30) is spaced apart from the holder central axis (B) by a respective first radial pocket distance (R1); and in the outer adjusted position:

    the adjustment sleeve (44) is located at a second angular position relative to holder central axis (B); and

    each insert pocket (30) is spaced apart from the holder central axis (B) by a respective second radial pocket distance (R2), the second radial pocket distance (R2) being greater than the first radial pocket distance (R1).


     
    2. The tool holder (22), according to claim 1, wherein in the inner and outer adjusted positions, different cartridge pins (78) define the at least one active cartridge pin (78a), for at least some of the insert cartridges (26).
     
    3. The tool holder (22), according to claims 1 or 2, wherein each sleeve adjustment groove (62) extends along a spiral (S), and preferably the pitch angle (δ) of each spiral (S) is less than 10°.
     
    4. The tool holder (22), according to claim 3, wherein the adjustment sleeve (44) comprises exactly one sleeve adjustment groove (62), with a spiral center (Sc) contained at the holder central axis (B), and preferably the exactly one sleeve adjustment groove (62) extends about the sleeve central axis (A) between one and two turns.
     
    5. The tool holder (22), according to any one of claims 1-4 wherein each sleeve adjustment groove (62) intersects at least one of the sleeve through hole wall surface (54) and the sleeve peripheral surface (50).
     
    6. The tool holder (22), according to any one of claims 1-5, wherein the rotational sleeve direction (DRS) is defined by the preceding direction (DP).
     
    7. The tool holder (22), according to any one of claims 1-6, wherein:

    the sleeve peripheral surface (50) is defined by an imaginary outer sleeve cylinder (COS) having an outer sleeve diameter (DOS);

    the sleeve through hole wall surface (54) is defined by an imaginary inner sleeve cylinder (CIS) having an inner sleeve diameter (DIS); and

    the inner sleeve diameter (DIS) is greater than 70% of the outer sleeve diameter (DOS).


     
    8. The tool holder (22), according to any one of claims 1-7, wherein:

    each insert cartridge (26) comprises a plurality of cartridge pins (78); and

    for each insert cartridge (26), at least one of the cartridge pins (78) is not located in any of the sleeve adjustment groove (62), thereby defining an at least one non-active cartridge pin (78b); and preferably:

    the forward body portion (32) comprises a plurality of cartridge pin storage channels (80) recessed in the body forward surface (36), each associated with one of the body engagement surfaces (42); and

    in the inner adjusted position:
    for at least one insert cartridge (26), any non-active cartridge pins (78b) which are located radially inwards from the at least one active cartridge pin (78a) are located in one of the cartridge pin storage channels (80).


     
    9. The tool holder (22), according to any one of claims 1-8, wherein:

    each body engagement surface (42) comprises at least one linear engagement recess (74) and/or at least one linear engagement projection (76);

    each cartridge engagement surface (72) comprises at least one linear engagement recess (74) and/or at least one linear engagement projection (76); and

    the at least one engagement projection (76) is engaged to the at least one engagement recess (74); and preferably:

    each body engagement surface (42) comprises a plurality of linear engagement recesses (74) and a plurality of linear engagement projections (76);

    each cartridge engagement surface (72) comprises a plurality of linear engagement recesses (74) and a plurality of linear engagement projections (76);

    the linear engagement recesses (74) alternate with the linear engagement projections (76); and

    the plurality of linear engagement recesses (74) and the plurality of linear engagement projections (76) form a serrated engagement between the cartridge engagement surface (72) and the respective body engagement surface (42).


     
    10. The tool holder (22), according to claim 9, wherein:

    each insert cartridge (26) comprises a plurality of cartridge pins (78); and

    for each insert cartridge (26), the plurality of cartridge pins (78) are arranged in a linear manner, parallel to the at least one linear engagement recess (74) and/or the at least one linear engagement projection (76) located at the cartridge engagement surface (72).


     
    11. The tool holder (22), according to claims 9 or 10, wherein:

    the at least one engagement projection (76) and/or the at least one engagement recess (74) provided at each body engagement surface (42) extends in the inward and outward adjustment directions (DI, DO), and

    the inward and outward adjustment directions (DI, DO) are non-perpendicular to an axial pin half-plane (PP) containing the holder central axis (B) and intersecting the at least one active cartridge pin (78a).


     
    12. The tool holder (22), according to any one of claims 1-11, wherein in the inner and outer adjusted positions of the tool holder (22), the plurality of insert cartridges (26) are axially clamped to the holder body (24) by a clamping arrangement (82); and preferably:

    the forward body portion (32) comprises a body threaded hole (40) recessed in the body forward surface (36);

    the clamping arrangement (82) comprises a clamping plate (84) comprising a plate through hole (92) and a plurality of plate clamping portions (93);

    the clamping plate (84) is releasably attached to the tool holder (22) by a plate retaining screw (94) comprising a screw lower threaded portion (96), the plate retaining screw (94) located in the plate through hole (92) with the screw lower threaded portion (96) threadingly engaged with the body threaded hole (40);

    each plate clamping portion (93) clampingly engages a respective insert cartridge (26) to the holder body (24)' and further preferably:

    each insert cartridge (26) comprises:

    a cartridge forward surface (64) opposite the cartridge rearward surface (66); and

    an elongated cartridge pin recess (70) recessed in the cartridge forward surface (64);

    the clamping plate (84) comprises:

    opposite plate forward and rearward surfaces (86, 88) and a plate peripheral surface (90) extending therebetween; and

    a plurality of plate pins (102) projecting from the rearward plate surface (88); and

    for each insert cartridge (26), a respective plate pin (102) is located in the cartridge pin recess (70).


     
    13. The tool holder (22), according to any one of claims 1-12, wherein:

    the adjustment sleeve (44) comprises a sleeve threaded through hole (56) opening out to the sleeve through hole wall surface (54) and the sleeve peripheral surface (50);

    the forward body portion (32) comprises an annular body securing groove (58) recessed in the body peripheral surface (38) and extending about the holder central axis (B); and

    the adjustment sleeve (44) is releasably attached to the forward body portion (32) by a securing screw (60) located in the body securing groove (58) and threadingly engaged with the sleeve threaded through hole (56).


     
    14. A rotary cutting tool (20) comprising:

    a tool holder (22) in accordance with any one of claims 1-13; and

    a plurality of cutting inserts (28), each cutting insert (28) releasably retained in a respective insert pocket (30).


     


    Ansprüche

    1. Werkzeughalter (22), der zur Rotation um eine Haltermittelachse (B) konfiguriert ist, die axial entgegengesetzte Vorwärts- und Rückwärtsrichtungen (DF, DR) sowie entgegengesetzte vorangehende und nachfolgende Rotationsrichtungen (DP, Ds) definiert, wobei die vorangehende Richtung (DP) die Schneidrichtung ist, wobei der Werkzeughalter (22) aufweist:

    einen Halterkörper (24) mit einem nach vorn angeordneten vorderen Körperabschnitt (32), wobei der vordere Körperabschnitt (32) eine allgemein vorwärtsweisende vordere Körperfläche (36) und eine Körperumfangsfläche (38) aufweist, die sich um die Haltermittelachse (B) erstreckt und die vordere Körperfläche (36) begrenzt, wobei die vordere Körperfläche (36) mehrere Körpereingriffsflächen (42) aufweist;

    eine Einstellhülse (44) mit einer Hülsenmittelachse (A), wobei die Einstellhülse (44) aufweist:

    entgegengesetzte vordere und hintere Hülsenendflächen (46, 48) sowie eine sich dazwischen erstreckende Hülsenumfangsfläche (50);

    ein Hülsendurchgangsloch (52) mit einer Hülsendurchgangsloch-Wandfläche (54), die sich um die Hülsenmittelachse (A) erstreckt und die vordere und hintere Hülsenendfläche (46, 48) verbindet; und

    mindestens eine Hülseneinstellnut (62), die in der vorderen Hülsenendfläche (46) ausgespart ist, wobei sich sämtliche Hülseneinstellnuten (62) mit abnehmendem Abstand von der Hülsenmittelachse (A) in einer Hülsendrehrichtung (DRS) erstrecken, die durch die vorangehende oder nachfolgende Richtung (DP, DS) definiert ist; und

    mehrere Einsatzkassetten (26), wobei jede Einsatzkassette (26) aufweist:

    eine Einsatztasche (30);

    eine rückwärts weisende hintere Kassettenfläche (66) mit einer Kassetteneingriffsfläche (72), die in gegenseitigen Eingriff mit einer jeweiligen Körpereingriffsfläche (42) steht, so dass die Einsatzkassette (26) in entgegengesetzte Einwärts- und Auswärtseinstellrichtungen (Di, Do) verschiebbar ist; und

    mindestens einen Kassettenstift (78), der von der hinteren Kassettenfläche (66) vorsteht, wobei:

    die Einstellhülse (44) über den Umfang um den Körperhalter (24) mit der Hülsendurchgangsloch-Wandfläche (54) zur Körperumfangsfläche (38) weisend angeordnet ist, so dass die Einstellhülse (44) im Hinblick auf den vorderen Körperabschnitt (32) drehverschiebbar ist; und

    mindestens einer der Kassettenstifte (78) in einer jeweiligen der Hülseneinstellnuten (62) liegt, was mindestens einen aktiven Kassettenstift (78a) definiert, und:

    der Werkzeughalter (22) zwischen einer Inneneinstellposition und einer Außeneinstellposition bei Drehung der Einstellhülse (44) um die Halterachse (B) in Hülsendrehrichtung (DRS) einstellbar ist; wobei

    in der Inneneinstellposition:

    die Einstellhülse (44) in einer ersten Winkelposition relativ zur Haltermittelachse (B) liegt; und

    jede Einsatztasche (30) von der Haltermittelachse (B) einen jeweiligen ersten Radialtaschenabstand (R1) hat, und

    in der Außeneinstellposition:

    die Einstellhülse (44) in einer zweiten Winkelposition relativ zur Haltermittelachse (B) liegt; und

    jede Einsatztasche (30) von der Haltermittelachse (B) einen jeweiligen zweiten Radialtaschenabstand (R2) hat, wobei der zweite Radialtaschenabstand (R2) größer ist als der erste Radialtaschenabstand (R1).


     
    2. Werkzeughalter (22) nach Anspruch 1, wobei in der Innen- und Außeneinstellposition unterschiedliche Kassettenstifte (78) den mindestens einen aktiven Kassettenstift (78a) für mindestens einige der Einsatzkassetten (26) definieren.
     
    3. Werkzeughalter (22) nach Anspruch 1 oder 2, wobei sich jede Hülseneinstellnut (62) entlang einer Spirale (S) erstreckt und vorzugsweise der Steigungswinkel (δ) jeder Spirale (S) kleiner als 10° ist.
     
    4. Werkzeughalter (22) nach Anspruch 3, wobei die Einstellhülse (44) genau eine Hülseneinstellnut (62) mit einer in der Haltermittelachse (B) enthaltenen Spiralmitte (Sc) aufweist und sich vorzugsweise die genau eine Hülseneinstellnut (62) um die Hülsenmittelachse (A) zwischen einer und zwei Windungen erstreckt.
     
    5. Werkzeughalter (22) nach einem der Ansprüche 1 bis 4, wobei jede Hülseneinstellnut (62) die Hülsendurchgangsloch-Wandfläche (54) und/oder die Hülsenumfangsfläche (50) schneidet.
     
    6. Werkzeughalter (22) nach einem der Ansprüche 1 bis 5, wobei die Hülsendrehrichtung (DRS) durch die vorangehende Richtung (DP) definiert ist.
     
    7. Werkzeughalter (22) nach einem der Ansprüche 1 bis 6, wobei:

    die Hülsenumfangsfläche (50) durch einen gedachten Außenhülsenzylinder (Cos) mit einem Außenhülsendurchmesser (Dos) definiert ist;

    die Hülsendurchgangsloch-Wandfläche (54) durch einen gedachten Innenhülsenzylinder (Cis) mit einem Innenhülsendurchmesser (DIS) definiert ist; und

    der Innenhülsendurchmesser (Dis) größer als 70 % des Außenhülsendurchmessers (DOS) ist.


     
    8. Werkzeughalter (22) nach einem der Ansprüche 1 bis 7, wobei:

    jede Einsatzkassette (26) mehrere Kassettenstifte (78) aufweist; und

    für jede Einsatzkassette (26) mindestens einer der Kassettenstifte (78) nicht in einer der Hülseneinstellnuten (62) liegt, wodurch mindestens ein inaktiver Kassettenstift (78b) definiert ist; und vorzugsweise:

    der vordere Körperabschnitt (32) mehrere Kassettenstift-Aufnahmekanäle (80) aufweist, die in der vorderen Körperfläche (36) ausgespart und jeweils einer der Körpereingriffsflächen (42) zugeordnet sind; und

    in der Inneneinstellposition:
    für mindestens eine Einsatzkassette (26) alle inaktiven Kassettenstifte (78b), die vom mindestens einen aktiven Kassettenstift (78a) radial einwärts liegen, in einem der Kassettenstift-Aufnahmekanäle (80) liegen.


     
    9. Werkzeughalter (22) nach einem der Ansprüche 1 bis 8, wobei:

    jede Körpereingriffsfläche (42) mindestens eine lineare Eingriffsaussparung (74) und/oder mindestens einen linearen Eingriffsvorsprung (76) aufweist;

    jede Kassetteneingriffsfläche (72) mindestens eine lineare Eingriffsaussparung (74) und/oder mindestens einen linearen Eingriffsvorsprung (76) aufweist; und

    der mindestens eine lineare Eingriffsvorsprung (76) im Eingriff mit der mindestens einen linearen Eingriffsaussparung (74) steht; und vorzugsweise:

    jede Körpereingriffsfläche (42) mehrere lineare Eingriffsaussparungen (74) und mehrere lineare Eingriffsvorsprünge (76) aufweist;

    jede Kassetteneingriffsfläche (72) mehrere lineare Eingriffsaussparungen (74) und mehrere lineare Eingriffsvorsprünge (76) aufweist;

    sich die linearen Eingriffsaussparungen (74) mit den linearen Eingriffsvorsprüngen (76) abwechseln; und

    die mehreren linearen Eingriffsaussparungen (74) und die mehreren linearen Eingriffsvorsprünge (76) einen verzahnten Eingriff zwischen der Kassetteneingriffsfläche (72) und der jeweiligen Körpereingriffsfläche (42) bilden.


     
    10. Werkzeughalter (22) nach Anspruch 9, wobei:

    jede Einsatzkassette (26) mehrere Kassettenstifte (78) aufweist; und

    für jede Einsatzkassette (26) die mehreren Kassettenstifte (78) auf lineare Weise, parallel zur mindestens einen linearen Eingriffsaussparung (74) und/oder zum mindestens einen linearen Eingriffsvorsprung (76) angeordnet sind, die (der) an der Kassetteneingriffsfläche (72) liegt.


     
    11. Werkzeughalter (22) nach Anspruch 9 oder 10, wobei:

    sich der mindestens eine Eingriffsvorsprung (76) und/oder die mindestens eine Eingriffsaussparung (74), der (die) an jeder Körpereingriffsfläche (42) vorgesehen ist, in Einwärts- und Auswärtseinstellrichtung (Di, Do) erstreckt und

    die Einwärts- und Auswärtseinstellrichtung (Di, Do) nicht senkrecht zu einer axialen Stifthalbebene (PP) sind, die die Haltermittelachse (B) enthält und den mindestens einen aktiven Kassettenstift (78a) schneidet.


     
    12. Werkzeughalter (22) nach einem der Ansprüche 1 bis 11, wobei in der Innen- und Außeneinstellposition des Werkzeughalters (22) die mehreren Einsatzkassetten (26) am Halterkörper (24) durch eine Klemmanordnung (82) axial geklemmt sind; und vorzugsweise:

    der vordere Körperabschnitt (32) ein Körpergewindeloch (40) aufweist, das in der vorderen Körperfläche (36) ausgespart ist;

    die Klemmanordnung (82) eine Klemmplatte (84) mit einem Plattendurchgangsloch (92) und mehreren Plattenklemmabschnitten (93) aufweist;

    die Klemmplatte (84) am Werkzeughalter (22) durch eine Plattenhalteschraube (94) mit einem unteren Schraubengewindeabschnitt (96) lösbar angebracht ist, wobei die Plattenhalteschraube (94) im Plattendurchgangsloch (92) mit dem unteren Schraubengewindeabschnitt (96) im Gewindeeingriff mit dem Körpergewindeloch (40) liegt;

    jeder Plattenklemmabschnitt (93) einen Klemmeingriff mit einer jeweiligen Einsatzkassette (26) am Halterkörper (24)' herstellt und ferner vorzugsweise:

    jede Einsatzkassette (26) aufweist:

    eine vordere Kassettenfläche (64) entgegengesetzt zur hinteren Kassettenfläche (66); und

    eine längliche Kassettenstiftaussparung (70), die in der vorderen Kassettenfläche (64) ausgespart ist;

    die Klemmplatte (84) aufweist:

    entgegengesetzte vordere und hintere Plattenflächen (86, 88) und eine sich dazwischen erstreckende Plattenumfangsfläche (90); und

    mehrere Plattenstifte (102), die von der hinteren Plattenfläche (88) vorstehen; und

    für jede Einsatzkassette (26) ein jeweiliger Plattenstift (102) in der Kassettenstiftaussparung (70) liegt.


     
    13. Werkzeughalter (22) nach einem der Ansprüche 1 bis 12, wobei:

    die Einstellhülse (44) ein Hülsengewindedurchgangsloch (56) aufweist, das in der Hülsendurchgangsloch-Wandfläche (54) und der Hülsenumfangsfläche (50) mündet;

    der vordere Körperabschnitt (32) eine ringförmige Körperbefestigungsnut (58) aufweist, die in der Körperumfangsfläche (38) ausgespart ist und sich um die Haltermittelachse (B) erstreckt; und

    die Einstellhülse (44) am vorderen Körperabschnitt (32) durch eine Befestigungsschraube (60) lösbar angebracht ist, die in der Körperbefestigungsnut (58) liegt und in einem Gewindeeingriff mit dem Hülsengewindedurchgangsloch (56) steht.


     
    14. Rotierendes Schneidwerkzeug (20), das aufweist:

    einen Werkzeughalter (22) nach einem der Ansprüche 1 bis 13, und

    mehrere Schneideinsätze (28), wobei jeder Schneideinsatz (28) in einer jeweiligen Einsatztasche (30) lösbar festgehalten wird.


     


    Revendications

    1. Porte-outil (22) configuré pour une rotation autour d'un axe central du porte-outil (B) définissant des directions opposées axialement vers l'avant et vers l'arrière (DF, DR), et des directions opposées de rotation vers l'avant et vers l'arrière (DP, Ds), la direction précédente (DP) étant la direction de coupe, le porte-outil (22) comprenant :

    un corps de porte-outil (24) comprenant une partie avant du corps (32) disposée vers l'avant, la partie avant du corps (32) comprenant une surface avant du corps généralement orientée vers l'avant (36) et une surface périphérique du corps (38) qui s'étend autour de l'axe central du porte-outil (B) et lie la surface avant du corps (36), la surface avant du corps (36) comprenant une pluralité de surfaces d'engagement du corps (42) ;

    un manchon de réglage (44) ayant un axe central de manchon (A), le manchon de réglage (44) comprenant :

    des surfaces d'extrémité du manchon (46, 48) opposées vers l'avant et vers l'arrière et une surface périphérique du manchon (50) s'étendant entre elles ;

    un trou de passage du manchon (52) comprenant une surface de paroi de trou de passage du manchon (54) qui s'étend autour de l'axe central du manchon (A) et relie les surfaces d'extrémité avant et arrière du manchon (46, 48) ; et

    au moins une rainure de réglage du manchon (62) encastrée dans la surface d'extrémité avant du manchon (46), toutes les rainures de réglage du manchon (62) s'étendant avec une distance décroissante par rapport à l'axe central du manchon (A) dans une direction de rotation du manchon (DRS) définie par l'une des directions précédentes et suivantes (DP, DS) ; et

    une pluralité de cartouches d'insertion (26), chaque cartouche d'insertion (26) comprenant :

    une poche d'insertion (30) ;

    une surface arrière de la cartouche orientée vers l'arrière (66) comprenant une surface d'engagement de la cartouche (72) qui est mutuellement engagée dans une surface d'engagement respective du corps (42) de sorte que la cartouche d'insertion (26) puisse être déplacée dans des directions de réglage opposées vers l'intérieur et vers l'extérieur (DI, DO) ; et

    au moins une broche de cartouche (78) faisant saillie depuis la surface arrière de la cartouche (66),

    dans lequel :

    le manchon de réglage (44) est disposé circonférentiellement autour du corps de porte-outil (24), avec la surface de la paroi du trou de passage du manchon (54) faisant face à la surface périphérique du corps (38) de sorte que le manchon de réglage (44) peut être déplacé en rotation par rapport à la partie avant du corps (32) ; et

    au moins une des broches de cartouche (78) est située dans l'une des rainures de réglage du manchon (62) définissant au moins une broche de cartouche active (78a) ; et :

    le porte-outil (22) est réglable entre une position intérieure réglée et une position extérieure réglée lors de la rotation du manchon de réglage (44) autour de l'axe du porte-outil (B) dans une direction de rotation du manchon (DRS) ; dans lequel, dans la position intérieure réglée :

    le manchon de réglage (44) est situé dans une première position angulaire par rapport à l'axe central du porte-outil (B) ; et

    chaque poche d'insertion (30) est espacée de l'axe central du porte-outil (B) d'une première distance radiale de poche (R1) ; et

    dans la position extérieure réglée :

    le manchon de réglage (44) est situé dans une deuxième position angulaire par rapport à l'axe central du porte-outil (B) ; et

    chaque poche d'insertion (30) est espacée de l'axe central du porte-outil (B) d'une deuxième distance radiale de poche (R2), la deuxième distance radiale de poche (R2) étant supérieure à la première distance radiale de poche (R1).


     
    2. Porte-outil (22) selon la revendication 1, dans lequel, dans les positions réglées intérieure et extérieure, différentes broches de cartouche (78) définissent au moins une broche de cartouche active (78a), pour au moins certaines des cartouches d'insertion (26).
     
    3. Porte-outil (22) selon les revendications 1 ou 2, dans lequel chaque rainure de réglage du manchon (62) s'étend le long d'une spirale (S), et de préférence l'angle d'inclinaison (δ) de chaque spirale (S) est inférieur à 10°.
     
    4. Porte-outil (22) selon la revendication 3, dans lequel le manchon de réglage (44) comprend exactement une rainure de réglage du manchon (62), avec un centre de spirale (SC) contenu dans l'axe central du porte-outil (B), et de préférence la rainure de réglage du manchon (62) s'étend autour de l'axe central du manchon (A) entre un et deux tours.
     
    5. Porte-outil (22) selon l'une quelconque des revendications 1 à 4, dans lequel chaque rainure de réglage du manchon (62) coupe au moins l'une des surfaces de la paroi du trou de passage du manchon (54) et la surface périphérique du manchon (50).
     
    6. Porte-outil (22) selon l'une quelconque des revendications 1 à 5, dans lequel la direction de rotation du manchon (DRS) est définie par la direction précédente D(P).
     
    7. Porte-outil (22) selon l'une quelconque des revendications 1 à 6, dans lequel :

    la surface périphérique du manchon (50) est définie par un cylindre imaginaire du manchon extérieur (COS) ayant un diamètre du manchon extérieur (DOS) ;

    la surface de la paroi du trou de passage du manchon (54) est définie par un cylindre imaginaire du manchon intérieur (CIS) ayant un diamètre du manchon intérieur (DXIS) ; et

    le diamètre du manchon intérieur (DIS) est supérieur à 70 % du diamètre du manchon extérieur (DOS).


     
    8. Porte-outil (22) selon l'une quelconque des revendications 1 à 7, dans lequel :

    chaque cartouche d'insertion (26) comprend une pluralité de broches de cartouche (78) ; et

    pour chaque cartouche d'insertion (26), au moins une des broches de cartouche (78) n'est située dans aucune des rainures de réglage du manchon (62), définissant ainsi au moins une broche de cartouche non active (78b) ; et de préférence :

    la partie avant du corps (32) comprend une pluralité de canaux de stockage de broches de cartouche (80) encastrés dans la surface avant du corps (36), chacun associé à l'une des surfaces d'engagement du corps (42) ; et

    en position intérieure réglée :
    pour au moins une cartouche d'insertion (26), toutes les broches de cartouche non actives (78b) qui sont situées radialement à l'intérieur de la au moins une broche de cartouche active (78a) sont situées dans l'un des canaux de stockage des broches de cartouche (80).


     
    9. Porte-outil (22) selon l'une quelconque des revendications 1 à 8, dans lequel :

    chaque surface d'engagement du corps (42) comprend au moins un renfoncement d'engagement linéaire (74) et/ou au moins une saillie d'engagement linéaire (76) ;

    chaque surface d'engagement de la cartouche (72) comprend au moins un renoncement d'engagement linéaire (74) et/ou au moins une saillie d'engagement linéaire (76) ; et

    l'au moins une saillie d'engagement (76) est engagée dans l'au moins un renfoncement d'engagement (74) ; et de préférence :

    chaque surface d'engagement du corps (42) comprend une pluralité de renfoncements d'engagement linéaire (74) et une pluralité de saillies d'engagement linéaire (76) ;

    chaque surface d'engagement de la cartouche (72) comprend une pluralité de renfoncements d'engagement linéaire (74) et une pluralité de saillies d'engagement linéaire (76) ;

    les renfoncements d'engagement linéaire (74) alternent avec les saillies d'engagement linéaire (76) ; et

    la pluralité de renfoncements d'engagement linéaire (74) et la pluralité de saillies d'engagement linéaire (76) forment un engagement dentelé entre la surface d'engagement de la cartouche (72) et la surface d'engagement du corps respectif (42).


     
    10. Porte-outil (22) selon la revendication 9, dans lequel :

    chaque cartouche d'insertion (26) comprend une pluralité de broches de cartouche (78) ; et

    pour chaque cartouche d'insertion (26), la pluralité de broches de cartouche (78) est disposée de manière linéaire, parallèlement à au moins un renfoncement d'engagement linéaire (74) et/ou à au moins une saillie d'engagement linéaire (76) situés sur la surface d'engagement de la cartouche (72).


     
    11. Porte-outil (22) selon les revendications 9 ou 10, dans lequel :

    l'au moins une saillie d'engagement (76) et/ou l'au moins un renfoncement d'engagement (74) prévus sur chaque surface d'engagement du corps (42) s'étendent dans les directions de réglage vers l'intérieur et vers l'extérieur (DI, Do), et

    les directions de réglage vers l'intérieur et vers l'extérieur (DI, Do) ne sont pas perpendiculaires à un demi-plan axial de la broche (PP) contenant l'axe central du porte-outil (B) et coupant la au moins une broche active de la cartouche (78a).


     
    12. Porte-outil (22) selon l'une quelconque des revendications 1 à 11, dans lequel, dans les positions réglées intérieure et extérieure du porte-outil (22), la pluralité de cartouches d'insertion (26) est serrée axialement au corps du porte-outil (24) par un dispositif de serrage (82) ; et, de préférence :

    la partie avant du corps (32) comprend un trou fileté du corps (40) encastré dans la surface avant du corps (36) ;

    le dispositif de serrage (82) comprend une plaque de serrage (84) comportant un trou de passage de plaque (92) et plusieurs parties de serrage de plaque (93) ;

    la plaque de serrage (84) est fixée de manière amovible au porte-outil (22) par une vis de retenue de plaque (94) comprenant une partie filetée inférieure (96), la vis de retenue de plaque (94) étant située dans le trou de passage de plaque (92), la partie filetée inférieure (96) étant engagée de manière filetée dans le trou fileté du corps (40) ;

    chaque partie de serrage de plaque (93) fixe par serrage une cartouche d'insertion respective (26) au corps de porte-outil (24)' et de préférence :
    chaque cartouche d'insertion (26) comprend :

    une surface avant de cartouche (64) opposée à la surface arrière de cartouche (66) ; et

    un renfoncement allongé (70) pour la broche de cartouche, encastré dans la surface avant de la cartouche (64) ;

    la plaque de serrage (84) comprend :

    des surfaces avant et arrière opposées de la plaque (86, 88) et une surface périphérique de la plaque (90) s'étendant entre elles ; et

    une pluralité de broches de plaque (102) faisant saillie à partir de la surface arrière de la plaque (88) ; et

    pour chaque cartouche d'insertion (26), une broche de plaque respective (102) est située dans le renfoncement de la broche de cartouche (70).


     
    13. Porte-outil (22) selon l'une quelconque des revendications 1 à 12, dans lequel :

    le manchon de réglage (44) comprend un trou de passage fileté (56) débouchant sur la surface de la paroi du trou de passage (54) et sur la surface périphérique du manchon (50) ;

    la partie avant du corps (32) comprend une rainure annulaire de fixation du corps (58) encastrée dans la surface périphérique du corps (38) et s'étendant autour de l'axe central du porte-outil (B) ; et

    le manchon de réglage (44) est fixé de manière amovible à la partie avant du corps (32) par une vis de fixation (60) située dans la rainure de fixation du corps (58) et engagée de manière filetée dans le trou de passage fileté du manchon (56).


     
    14. Outil de coupe rotatif (20) comprenant :

    un porte-outil (22) selon l'une quelconque des revendications 1 à 13 ; et

    une pluralité de plaquettes de coupe (28), chaque plaquette de coupe (28) étant retenue de manière amovible dans une poche de plaquette respective (30).


     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description