Technical Field
[0001] The present invention relates to a guiding method and a guiding apparatus for straight
stocks including bar steels and wire rods.
Background Art
[0002] When manufacturing a steel product into straight stocks by hot rolling, in a hot
rolling line disclosed in Japanese Laid-open Patent Publication No.
2010-99669, for example, a heating furnace, a roughing mill, an intermediate rolling mill, a
finishing mill, a final finishing mill, and a laying head are arranged in sequence
from an upstream side to a downstream side, and between the above-described finishing
mill and final finishing mill, a plurality of water-cooling apparatuses to cool a
wire rod are provided.
[0003] Generally, between the final finishing mill and the laying head, a pinch roll stand
is disposed and downstream thereof, a guiding means for directing the above-described
wire rod to the laying head is disposed, which is not disclosed in the above-described
Japanese Laid-open Patent Publication.
[0004] Then, the above-described laying head is placed obliquely at a predetermined angle
relative to the above-described pinch roll stand, and when guiding a wire rod small
in diameter to the above-described laying head from the pinch roll side at high speed,
a pipe guide (guiding pipe) is used as the guiding means. The above-described pipe
guide is disposed between the pinch roll stand and the laying head and has a convexly
curved shape.
Prior Art Documents
Patent Document
[0005] Patent Document 1: Japanese Laid-open Patent Publication No.
2010-99669
[0006] CN 103157662A, on which the preamble of claim 1 is based, discloses a rolling pre-bending device.
An all-guide-roller structure is adopted to solve the problem that an existing power
pre-bending device can scratch the surfaces of wire rods. A major structure of the
rolling pre-bending device is formed by a base plate, a clamp plate and guide rollers.
Summary of the Invention
Problems to be solved by the Invention
[0007] At the time of guiding of a wire rod, when the above-described wire rod having a
small diameter and running at high speed that has been discharged from the pinch roll
is guided to the laying head by the pipe guide, when the wire rod comes into contact
with an inner surface of the above-described pipe guide, the contact causes scratches,
and further by the contact, speed variations of the wire rod are caused, to thereby
cause a problem that a good ring cannot be formed by the laying head. In other words,
the above-described scratches and speed variations of the wire rod make it impossible
to obtain stable ring formation, to result in a problem that should be solved finally
in terms of the quality of the wire rod and operational matters.
[0008] An object of the present invention is to prevent generation of scratches of straight
stocks and improve quality of the straight stocks, and to obtain a stable ring shape.
Means for solving the problems
[0009] Described herein is a guiding method for guiding straight stocks from a pinch roll
on a downstream side of a final finishing mill in a hot rolling line to a laying head
disposed at a position displaced downward from a position facing the pinch roll with
a space left therebetween on a downstream side of the pinch roll. It includes: while
guiding the straight stocks to the downstream side by a plurality of rollers of bend
forming roller guides, bend forming the straight stocks in a laying head direction;
and while bend-back forming the bent-formed straight stocks in the laying head direction
by a plurality of rollers of bend-back forming roller guides on the downstream side,
guiding the straight stocks to the laying head.
[0010] A feature of the present invention lies in a straight stocks guiding apparatus according
to the appended independent claim.
[0011] A further feature of the present invention includes the above-described feature,
and lies in that a center guide is provided in the roller guides of the respective
guidance equipments.
[0012] A further feature of the present invention includes any one of the above-described
features, and lies in that the guidance equipments are each constituted by at least
two consecutive roller guides, and the roller guides each combine at least three rollers.
[0013] A further feature of the present invention includes any one of the above-described
features, and lies in that
the roller guides in the guidance equipments each include roller eccentricity adjusting
mechanisms for adjusting positions of the rollers.
[0014] A further feature of the present invention includes any one of the above-described
features, and lies in that
the roller guides in the guidance equipments are each mounted on a base plate being
the supporting means so as to be replaceable singly.
[0015] A further feature of the present invention includes any one of the above-described
features, and lies in that
the roller guides in all the guidance equipments are the same in constitution.
[0016] A further feature of the present invention includes any one of the above-described
features, and lies in that
a member with a small friction coefficient is used for a bearing of the bearing part.
[0017] A further feature of the present invention includes any one of the above-described
features, and lies in that
a resin-made seal is disposed on the bearing part.
Advantageous Effect of the Invention
[0018] According to the present invention, as the bending and guidance equipment, bend forming
roller guides are provided and as the bending-back and guidance equipment, bend-back
forming roller guides are provided, to thereby enable bend guiding and linear guiding
of straight stocks, resulting in that it is possible to make the guiding of the above-described
straight stocks to a laying head smooth, prevent generation of scratches on a pipe
guide that has been used conventionally, improve quality, avoid coming into contact
with a quill pipe inside the laying head, and form a stable ring.
Brief Description of Drawings
[0019]
FIG. 1 is a front view illustrating a straight stocks guiding apparatus according
to the present invention, and is a view in which a part of a bed plate is cut out;
FIG. 2 is an enlarged front view illustrating a first bend forming roller guide in
a first guidance equipment of the straight stocks guiding apparatus according to the
present invention;
FIG. 3 is an enlarged side view illustrating the first bend forming roller guide in
the first guidance equipment of the straight stocks guiding apparatus according to
the present invention;
FIG. 4 is an enlarged plan view illustrating the first bend forming roller guide in
the first guidance equipment of the straight stocks guiding apparatus according to
the present invention;
FIG. 5 is a cross-sectional view illustrating a roller attached state of the first
bend forming roller guide in the first guidance equipment of the straight stocks guiding
apparatus according to the present invention in an enlarged manner;
FIG. 6 is a cross-sectional view illustrating a relationship between respective rollers
of the first bend forming roller guide and a center guide in the first guidance equipment
of the straight stocks guiding apparatus according to the present invention in an
enlarged manner;
FIG. 7(i) to FIG. 7(iii) are constitution diagrams each for explaining interactions
of respective rollers in the first guidance equipment and second and third guidance
equipments of the straight stocks guiding apparatus according to the present invention;
and
FIG. 8 is an enlarged side view illustrating an exit guide of a pinch roll in the
straight stocks guiding apparatus according to the present invention.
Best Mode for Carrying out the Invention
[0020] There will be explained a straight stocks guiding apparatus according to the present
invention with reference to the drawings.
[0021] The straight stocks guiding apparatus illustrated in FIG. 1 includes: a first guidance
equipment G1 being a bending and guidance equipment; a second guidance equipment G2
being a guidance equipment for intermediate mill; and a third guidance equipment G3
being a bending-back and guidance equipment in order to guide straight stocks from
a pinch roll P disposed on a downstream side of a final finishing mill in a hot-rolling
line to a laying head H.
[0022] In FIG. 1, the laying head H on the most downstream side (right side in the drawing)
is disposed at a position displaced downward from a position facing the pinch roll
with a space left from the pinch roll P on a downstream side of the pinch roll. That
is, the laying head H is disposed in a downward inclined direction with a space left
from the pinch roll P on the downstream side.
[0023] Between the pinch roll P and the laying head H, a base plate 1 having a substantially
"upwardly curved shape" is disposed. A bed plate 1a having the same shape is overlaid
on the front surface of the base plate 1, and the first, second and third guidance
equipments G1, G2, and G3 are removably mounted on this bed plate.
[0024] The first guidance equipment G1 will be explained with reference to FIG. 1 to FIG.
6.
[0025] In FIG. 1, the first guidance equipment G1 on the upstream side includes a plurality
of bend forming roller guides (two bend forming roller guides G11 and G12 in the illustrated
example). The first and second bend forming roller guides G11 and G12 are to guide
the above-described straight stocks to a laying head H direction and have a function
to bend form the above-described straight stocks downward in FIG. 1, which is the
laying head H direction.
[0026] The first bend forming roller guide G11, which is one of the first and second bend
forming roller guides G11 and G12, will be explained.
[0027] In FIG. 2 to FIG. 4, the first bend forming roller guide G11 includes a guide unit
2. The guide unit 2 is attachably/detachably mounted on the bed plate 1a by mounting
bolts 3, and this bed plate is fixed to the front surface of the base plate by fixing
bolts 4 (FIG. 1). The first bend forming roller guide G11 is replaceable with a new
one singly with respect to the base plate 1 via the guide unit 2.
[0028] A plurality of rollers 5, 6, and 7 are provided in the guide unit 2. In the example
of the guide unit 2 illustrated in FIG. 2, the two rollers 5 and 6 are provided on
the upper side and the single roller 7 is provided on the lower side, and a line connecting
centers of the respective rollers forms an inverted triangle. The rollers 5, 6, and
7 give a bending force to draw a gentle circular arc in the laying head H direction
to the above-described straight stocks to guide them to the downstream side (right
side in FIG. 1).
[0029] In FIG. 3 to FIG. 5, the rollers 5, 6, and 7 are each easily rotatably attached to
each roller pin 8 via a bearing part 9. A member with a small friction coefficient
(for example, ceramic, or the like) is used for a bearing 9a of the bearing part 9,
to thereby make it possible to suppress heat generation with respect to rotation of
the roller corresponding to a running speed of the straight stocks. For the bearings
9a illustrated in FIG. 3 and FIG. 5, a ball bearing having balls 9b disposed thereinside
is used. According to the example illustrated in FIG. 5, in the bearing part 9, a
resin-made seal 9c is provided on both ends of the roller 6, to thereby prevent extraneous
matters such as scales from entering the inside and make it possible to suppress heat
generation with the roller rotating at high speed. Also in the bearing parts of the
other rollers 5 and 7 similarly (in FIG. 3, only the bearing part 9 of the roller
7 is illustrated), resin-made seals are provided.
[0030] In FIG. 5, 9d denotes a washer and 9e denotes a spacer.
[0031] In FIG. 2 to FIG. 5, a gear wheel 10 rotatably attached to an upper plate portion
of the guide unit 2 is integrally joined to an upper portion of each of the roller
pins 8. The respective roller pins 8 are eccntrically joined to the gear wheels 10.
Further, a lower end portion of each of the roller pins 8 is borne by an eccentric
piece 11 rotatably attached to a lower plate portion of the guide unit 2. The respective
roller pins 8 are eccntrically connected to the eccentric pieces 11.
[0032] In FIG. 2, FIG. 4, and FIG. 6, inside the guide unit 2 of the first bend forming
roller guide G11, a center guide 17 is provided. The center guide 17 is fixed to the
guide unit 2 by center guide fixing bolts 18, and a tip portion (left end portion
in FIG. 6) of the center guide 17 is protruded from the guide unit. The center guide
17 is to bring the straight stocks into the space between the rollers 5 and 6 on the
upper side and the roller 7 on the lower side in FIG. 6. Then, from entering an entrance
17a to passing through an exit 17b of the center guide 17 illustrated in FIG. 6, the
straight stocks are reduced by each of the rollers 5, 6, and 7 to be bent in the laying
head H direction.
[0033] The thin straight stocks to run at high speed tend to swing up and down or right
and left during running, and therefore the center guide 17 has a role of helping the
above-described straight stocks passing through the inside of the guide unit 2 to
run straight to make directing and reduction by the rollers 5, 6, and 7 secure.
[0034] The first bend forming roller guide G11 illustrated in FIG. 2 to FIG. 4 is provided
with roller eccentricity adjusting mechanisms 12 for adjusting positions (reduction
positions) of the rollers 5, 6, and 7 respectively.
[0035] The eccentricity adjusting mechanisms 12 each include: the gear wheel 10; the eccentric
piece 11; a pinion shaft 13; and a pinion 14. Each of the pinion shafts 13 is rotatably
borne by a pedestal 15. The respective pedestals 15 are firmly fixed onto the guide
unit 2 by mounting bolts 16. Each of the pinions 14 is attached to the pinion shaft
13 to mesh with the gear wheel 10.
[0036] By rotation operations of the respective pinion shafts 13, the respective pinions
14 rotate and with the rotations of the respective pinions, the respective gear wheels
10 rotate, and thereby the respective roller pins 8 attached to the rotating gear
wheels in an eccentric state also rotate and the respective rollers 5, 6, and 7 are
made eccentric (move), resulting that the reduction positions can be adjusted.
[0037] In FIG. 1 and FIG. 2, the other second bend forming roller guide G12 in the first
guidance equipment G1 is disposed adjacently to the one first bend forming roller
guide G11 on the downstream side thereof (right side in FIG. 1) with a space left
therebetween. The constitution of the second bend forming roller guide G12 is the
same as that of the first bend forming roller guide G11. For this reason, as for reference
numerals and symbols denoting components of the second bend forming roller guide G12
common to those of the first bend forming roller guide G11, the reference numerals
and symbols used during the explanation of the first bend forming roller guide are
used as they are.
[0038] The difference of the second bend forming roller guide G12 from the first bend forming
roller guide G11 is that as illustrated in FIG. 1, the second bend forming roller
guide is half rotated (rotated by 180° clockwise) from the first bend forming roller
guide to be mounted on the base plate 1. For this reason, dispositions of the components
of the second bend forming roller guide G12 are positioned in an inverted manner from
the first bend forming roller guide G11. As a result, of the second bend forming roller
guide G12, two rollers 5 and 6 are disposed on the lower side in FIG. 1 and a single
roller 7 is disposed on the upper side in the same drawing.
[0039] As above, the first guidance equipment G1 enables smooth guiding to the laying head
in a manner that the first and second bend forming roller guides G11 and G12 having
the same constitution are aligned contiguously on the base plate 1 (bed plate 1a)
so as to be inverted to each other and are adjacently disposed in a form in which
the combination of the two upper rollers 5 and 6 and the single lower roller 7 and
the inverted combination (combination of the single upper roller 7 and the two lower
rollers 5 and 6) are one set and a curvature enabling the straight stocks to bend
in the laying head H direction is made.
[0040] There will be explained the second guidance equipment G2 with reference to FIG. 1.
[0041] The second guidance equipment G2 is contiguous to the above-described first guidance
equipment G1 on the downstream side thereof. The second guidance equipment G2 includes
a plurality of directing roller guides (two directing roller guides G21 and G22 in
the illustrated example). The first and second directing roller guides G21 and G22
have a function to guide the above-described straight stocks along the above-described
downward inclined direction to direct them to the third guidance equipment G3.
[0042] Each constitution of the first and second directing roller guides G21 and G22 is
the same as that of the above-described first and second bend forming roller guides
G11 and G12. For this reason, as for reference numerals and symbols denoting components
of the first and second directing roller guides G21 and G22 common to those of the
first and second bend forming roller guides G11 and G12, the reference numerals and
symbols used during the explanation of the first and second bend forming roller guides
G11 and G12 are used as they are.
[0043] The difference lies in disposition positions of the first and second directing roller
guides G21 and G22 that are provided contiguously.
[0044] That is, the first guidance equipment G1 and the second guidance equipment G2 are
different in that the first and second bend forming roller guides G11 and G12 placed
on the left side in FIG. 1 are in a state inverted to each other, while each of both
the first and second directing roller guides G21 and G22 includes rollers 5 and 6
positioned on the upper side and a roller 7 positioned on the lower side and therefore
the first and second directing roller guides G21 and G22 are not in an inverted state.
[0045] The relationship between the adjacent first directing roller guide G21 and second
bend forming roller guide G12 is that the roller 7 of the one first directing roller
guide (right in FIG. 1) is positioned on the lower side and the roller 7 of the other
second bend forming roller guide (left) is positioned on the upper side, resulting
in that the second bend forming roller guide G12 is mounted on the base plate 1 so
as to be inverted.
[0046] The first and second directing roller guides G21 and G22 can direct the straight
stocks passing through the center guide 17 by their upper rollers 5 and 6 and their
lower rollers 7.
[0047] In roller eccentricity adjusting mechanisms 12 in the first and second directing
roller guides G21 and G22 illustrated in FIG. 1, directing positions of the rollers
5, 6, and 7 can be adjusted by their eccentric operations.
[0048] There will be explained the third guidance equipment G3 with reference to FIG. 1
[0049] The third guidance equipment G3 is contiguous to the above-described second guidance
equipment G2 on the downstream side thereof, and includes a plurality of bend-back
forming roller guides (two bend-back forming roller guides G31 and G32 in the illustrated
example) for bending back the above-described straight stocks to make the guiding
to the laying head H smooth.
[0050] The first and second bend-back forming roller guides G31 and G32 achieve the guiding
of the above-described straight stocks to the laying head H, and have a function for
bending back the above-described straight stocks being guided in a bent state and
forming them linearly in order to make the guiding to the laying head smooth. In other
words, the first and second bend-back forming roller guides G31 and G32 constituting
the third guidance equipment G3 have a function to linearly form the straight stocks
running while being guided by the second guidance equipment G2 in a bent state in
order to prevent the straight stocks from running directly toward the laying head
H direction and coming into contact with a quill pipe Ha being a guiding pipe in the
laying head.
[0051] Each constitution of the first and second bend-back forming roller guides G31 and
G32 is the same as that of the first and second bend forming roller guides G11 and
G12. For this reason, as for reference numerals and symbols denoting components of
the first and second bend-back forming roller guides G31 and G32 common to those of
the first and second bend forming roller guides G11 and G12, the reference numerals
and symbols used during the explanation of the first and second bend forming roller
guides are used as they are.
[0052] Regarding disposition positions of rollers 5, 6, and 7, the first guidance equipment
G1 and the third guidance equipment G3 are different in that the first bend forming
roller guide G11 has a combination of the two upper rollers 5 and 6 and the single
lower roller 7, while the first bend-back forming roller guide G31 has a combination
of the single upper roller 7 and the two lower rollers 5 and 6. Then, the first guidance
equipment G1 and the third guidance equipment G3 are different in that the second
bend forming roller guide G12 has a combination of the single upper roller 7 and the
two lower rollers 5 and 6, while the second bend-back forming roller guide G32 has
a combination of the two upper rollers 5 and 6 and the single lower roller 7.
[0053] Further, the first and second bend-back forming roller guides G31 and G32 are different
from the first bend forming roller guide in that the first and second bend-back forming
roller guides G31 and G32 are each inclined by a predetermined angle toward the clockwise
side in FIG. 1 relative to the first bend forming roller guide G11 to be mounted on
the bed plate 1a.
[0054] The dispositions of the rollers 5, 6, and 7 of the first bend-back forming roller
guide G31 are in a state inverted to those of the rollers 5, 6, and 7 of the second
directing roller guide G22 adjacent on the upstream side (left side in FIG. 1).
[0055] As illustrated in FIG. 1, in the third guidance equipment G3, the first and second
bend-back forming roller guides G31 and G32 with their combinations of the rollers
5, 6, and 7 being inverted to each other are disposed contiguously, and in order to
prevent the bent straight stocks guided by the second guidance equipment G2 from proceeding
according to the curvature, the rollers of respective groups of the first and second
bend-back forming roller guides bend back the straight stocks in the laying head H
direction and correct them straight to smoothly guide them to the quill pipe Ha in
the laying head H along the straight line.
[0056] There will be explained interactions of six groups of the rollers 5, 6, and 7 of
the respective first, second, and third guidance equipments G1, G2, and G3 illustrated
in FIG. 1 with reference to FIG. 7(i) to FIG. 7(iii).
[0057] Incidentally, in FIG. 7(i) to FIG. 7(iii), in order to distinguish the respective
rollers of the combinations in the six groups of the rollers from one another, reference
numerals and symbols 5A1 to 5A6 are used for the rollers 5 illustrated in FIG. 1,
reference numerals and symbols 6A1 to 6A6 are used for the rollers 6, and reference
numerals and symbols 7A1 to 7A6 are used for the rollers 7.
[0058] In the first guidance equipment G1 in FIG. 7(i), first three-point bending of the
straight stocks is performed through reductions performed by three of the rollers
5A1, 7A1, and 6A1 of the first bend forming roller guide G11, and next second three-point
bending of the straight stocks is performed through reductions performed by three
of the rollers 7A1 and 6A1 and the roller 6A2 of the second bend forming roller guide
G12 in total, and continuously third three-point bending of the straight stocks is
performed through reductions performed by three of the roller 6A1, and the rollers
6A2 and 7A2 of the second bend forming roller guide G12 in total, and further fourth
three-point bending of the straight stocks is performed through reductions performed
by three of the rollers 6A2, 7A2, and 5A2 of the second bend forming roller guide
G12.
[0059] Therefore, in a course where the straight stocks are guided to the downstream side
by the first bend forming roller guide G11 and the second bend forming roller guide
G12, a bending force is given to the straight stocks four times by the group of the
inverted rollers 5A1, 7A1, and 6A1 and the group of the rollers 5A2, 7A2, and 6A2,
and forming to draw a gentle circular arc is performed along the laying head H direction.
[0060] In the second guidance equipment G2 in FIG. 7(ii), the bent-formed straight stocks
are smoothly guided to the third guidance equipment G3 by the rollers 5A3, 7A3, and
6A3 of the first directing roller guide G21 and the rollers 5A4, 7A4, and 6A4 of the
second directing roller guide G22.
[0061] In the third guidance equipment G3 in FIG. 7(iii), first three-point bending of the
straight stocks is performed through reductions performed by three of the rollers
6A5, 7A5, and 5A5 of the first bend-back forming roller guide G31, and next second
three-point bending of the straight stocks is performed through reductions performed
by three of the rollers 7A5 and 5A5 and the roller 5A6 of the second bend-back forming
roller guide G32 in total, and continuously third three-point bending of the straight
stocks is performed through reductions performed by three of the roller 5A5, and the
rollers 5A6 and 7A6 of the second bend-back forming roller guide G32 in total, and
further fourth three-point bending of the straight stocks is performed through reductions
performed by three of the rollers 5A6, 7A6, and 6A6 of the second bend-back forming
roller guide G32.
[0062] Therefore, in a course where the straight stocks are guided to the downstream side
by the first bend-back forming roller guide G31 and the second bend-back forming roller
guide G32, a bending force is given to the straight stocks four times by the group
of the inverted rollers 6A5, 7A5, and 5A5 and the group of the rollers 5A6, 7A6, and
6A6, and correct-forming of the straight stocks to extend linearly along the laying
head H direction is performed.
[0063] As above, in the first and second bend forming roller guides G11 and G12, the combination
of three rollers being the rollers 5A1, 6A1, and 7A1 and the combination of three
rollers being the rollers 5A2, 6A2, and 7A2 are continued downstream, and in the first
and second directing roller guides G21 and G22, the combination of three rollers being
the rollers 5A3, 6A3, and 7A3 and the combination of three rollers being the rollers
5A4, 6A4, and 7A4 are continued downstream, and in the first and second bend-back
forming roller guides G31 and G32, the combination of three rollers being the rollers
5A5, 6A5, and 7A5 and the combination of three rollers being the rollers 5A6, 6A6,
and 7A6 are continued downstream, and thereby bend-forming, directing, and bend-back
forming of the straight stocks are performed smoothly and securely.
[0064] As illustrated in FIG. 1, at the exit side of the pinch roll P, an exit guide 19
is disposed.
[0065] The exit guide 19 is to guide the straight stocks pressed out from the pinch roll
P to the first bend forming roller guide G11 in the first guidance equipment G1 positioned
on the most upstream side.
[0066] As illustrated in FIG. 1 and FIG. 8, the exit guide 19 is provided with a guide box
20. The guide box 20 is mounted on the bed plate 1a by mounting bolts 21. A cylindrical
delivery guide 22 is fixed inside the guide box 20 by a fixing bolt 23. A tip portion
side of the delivery guide 22 (left end portion side in FIG. 1) is protruded from
the inside of the guide box 20 toward a space facing the pinch roll P. The straight
stocks discharged from the pinch roll P pass through an inner hole 22a of the delivery
guide 22 to be guided to the center guide 17 of the first bend forming roller guide
G11.
[0067] A reference numeral and symbol 24 illustrated in FIG. 8 denotes a roll cooling water
nozzle.
[0068] Next, there will be explained a straight stocks guiding method of the present invention.
[0069] As illustrated in FIG. 1, in a hot rolling step, straight stocks discharged from
a final finishing mill are then guided to the pinch roll P and are pressed out from
the pinch roll to proceed to the two consecutive first and second bend forming roller
guides G11 and G12 of the first guidance equipment G1 on the most upstream side, where
a bending force is given to the straight stocks by the rollers 5, 6, and 7 and the
straight stocks are guided to the laying head H direction sequentially while drawing
a gentle downward curve, and then the straight stocks proceed to the two consecutive
first and second directing roller guides G21 and G22 of the second guidance equipment
G2, where the straight stocks are guided to the downstream side by the rollers along
the downward inclined direction, and further the straight stocks proceed to the two
consecutive first and second bend-back forming roller guides G31 and G32 of the third
guidance equipment G3, where bending of the straight stocks is gradually returned
to an original state by the rollers and the straight stocks become straight and then
are guided to the laying head H, and by the laying head, the straight stocks are formed
into a ring shape to be discharged.
[0070] There will be explained operations of the roller eccentricity adjusting mechanisms
12 illustrated in FIG. 1 and FIG. 2. When all or one of the pinion shafts 13 is rotated
in the first and second bend forming roller guides G11 and G12, the first and second
directing roller guides G21 and G22, and the first and second bend-back forming roller
guides G31 and G32, the gear wheels/gear wheel 10 rotate/rotates via the pinions/pinion
14 and all or one of the rollers 5, 6, and 7 corresponding to the roller pins eccntrically
rotates through the roller pins/roller pin 8 rotating simultaneously, and thereby
positions of the rollers (reduction positions in the respective bend forming roller
guides G11 and G12 and the respective bend-back forming roller guides G31 and G32,
and directing positions in the first and second directing roller guides G21 and G22)
are adjusted, to thereby enable optimum forming and guiding.
[0071] According the illustrated present invention, between the pinch roll P and the laying
head H, the rollers 5, 6, and 7 are disposed in place of a pipe guide explained in
a conventional example, thereby making it possible to prevent generation of scratches
of the straight stocks and improve their quality, and form a stable ring shape.
[0072] Further, the laying head H has the linear quill pipe Ha in the inside thereof, and
when an inner surface of this quill pipe and the straight stocks come into contact
with each other, the contact causes scratches and further by the contact, speed variations
of the straight stocks are caused, to thereby cause a risk that a good ring cannot
be formed. However, according to the illustrated present invention, by disposing the
rollers 5, 6, and 7, the generation of scratches can be prevented. Then, the straight
stocks having had the curvature provided thereto proceed to the laying head side (lower
side) along the curvature, to then come into contact with the inside of the quill
pipe Ha to cause a problem of ring forming, but the straight stocks having had the
curvature provided thereto are corrected straight (bent back), so that the contact
inside the quill pipe can be prevented, and further it is also useful for preventing
the rearmost end tail of the straight stocks from being whipping shaped and a stable
ring can be formed.
[0073] Although on the top surface of the base plate 1, the bed plate 1a as a part of the
base plate 1 is overlaid in the example illustrated in FIG. 1 and FIG. 2, the bed
plate is not necessarily required to be used.
[0074] Although the first guidance equipment G1 is constituted by the two consecutive roller
guides G11 and G12, the second guidance equipment G2 is constituted by the two consecutive
roller guides G21 and G22, and the third guidance equipment G3 is constituted by the
two consecutive roller guides G31 and G32 in the example illustrated in FIG. 1, all
or one of the guidance equipments may also be constituted by three or more consecutive
roller guides. Then, since the roller guides G11, G12, G21, G22, G31, and G32 in the
first, second and third guidance equipments G1, G2, and G3 are each mountable on and
removable from the base plate 1 singly, replacement of the single roller guide can
be performed as necessary and there is an advantage of making it easy to perform mounting
and maintenance, but mounting/removing singly is not necessarily an indispensable
condition. Further, each of the roller guides G11, G12, G21, G22, G31, and G32 can
be placed so as to counterrotate and their dispositions can be selected without any
inhibition, but the present invention is not necessarily limited to this disposition
example. Furthermore, since for all the respective roller guides G11, G12, G21, G22,
G31, and G32 in the illustrated example, one with the same structure is used, a decrease
in cost of manufacture can be achieved and as long as placement positions of the respective
roller guides are set on the bed plate 1a beforehand, any roller guide can be used
as it is, so that there is an advantage of facilitating mounting and removing workability
and maintenance work, but all the roller guides do not necessarily have to have the
same structure. In the two consecutive roller guides G11 and G12, their groups of
rollers are disposed so as to be inverted to each other, and in the two consecutive
roller guides G31 and G32 similarly, their groups of rollers are also disposed so
as to be inverted to each other, and thereby four bend formings become possible in
the former case and four bend-back formings become possible in the latter case, resulting
in that forming of the straight stocks can be performed smoothly and securely and
smooth guiding to the laying head H becomes possible.
[0075] In the two consecutive roller guides G21 and G22 illustrated in FIG. 1, both the
adjacent groups of rollers are aligned without being disposed so as to be inverted
to each other to make directing smooth, but like the respective groups of rollers
in the two consecutive roller guides G11 and G12, they may also be disposed so as
to be inverted to each other.
[0076] The example where members with a small friction coefficient are used for the bearing
9a of the bearing part 9 and the seal 9c is described, which means that the above-described
members are selectively used according to the speed of the straight stocks, and the
members are not necessarily limited to the above-described example.
[0077] Although in the illustrated example, it is designed so that the roller eccentricity
adjusting mechanisms 12 are provided in the respective roller guides G11, G12, G21,
G22, G31, and G32 to arbitrarily change the reduction positions or the directing positions
of the respective rollers 5, 6, and 7, to thereby enable optimum forming and guiding
of the above-described straight stocks, the roller eccentricity adjusting mechanisms
are not necessarily required to be provided.
[0078] Although in the example illustrated in FIG. 1, in order to facilitate positionings
of the first and second bend forming roller guides G11 and G12, the first and second
directing roller guides G21 and G22, and the first and second bend-back forming roller
guides G31 and G32, projecting or recessed positioning portions 1a1 are provided on
the bed plate 1a in a width direction of the bed plate 1a (up and down direction in
the drawing), these are provided as necessary.
Explanation of References
[0079]
G1 first guidance equipment (bending and guidance equipment)
G11 first bend forming roller guide (roller guide)
G12 second bend forming roller guide (roller guide)
G2 second guidance equipment (guidance equipment for intermediate mill)
G21 first directing roller guide (roller guide)
G22 second directing roller guide (roller guide)
G3 third guidance equipment (bending-back and guidance equipment)
G31 first bend-back forming roller guide (roller guide)
G32 second bend-back forming roller guide (roller guide)
H laying head
P pinch roll
1 base plate (supporting means)
2 guide unit
5, 6, and 7 roller
8 roller pin
9 bearing part
9a bearing
9c seal
10 gear wheel
12 roller eccentricity adjusting mechanism
13 pinion shaft
14 pinion
15 pedestal
17 center guide
1. A straight stocks guiding apparatus for directing straight stocks discharged from
a pinch roll (P) to a laying head (H) by rollers on an upper side and rollers on a
lower side that are disposed contiguously in a proceeding direction of the straight
stocks, the straight stocks apparatus comprising:
a bending and guidance equipment (G1), a guidance equipment for intermediate mill
(G2), and a bending-back and guidance equipment (G3), wherein
all of the guidance equipments (G1, G2, G3) are configured to be disposed from the
pinch roll on a downstream side of a final finishing mill in a hot rolling line to
the laying head and are intended for guiding the straight stocks, and the guidance
equipment for intermediate mill is positioned between the bending and guidance equipment
positioned on the pinch roll side and the bending-back and guidance equipment positioned
on the laying head side,
the bending and guidance equipment (G1), the guidance equipment for intermediate mill
(G2), and the bending-back and guidance equipment (G3) are mounted on a supporting
means (1),
the laying head (H) is configured to be disposed at a position displaced downward
from a position facing the pinch roll (P) with a space left from the pinch roll on
a downstream side of the pinch roll,
the bending and guidance equipment (G1) on an upstream side includes a plurality of
bend forming roller guides (G11, G12) for guiding the straight stocks to the downstream
side by a plurality of rollers (5, 6, 7) and giving a curvature enabling bending in
a laying head direction to the straight stocks,
the guidance equipment for intermediate mill (G2) includes a plurality of directing
roller guides for guiding the straight stocks bent by the bending and guidance equipment
(G1) along a downward inclined direction by a plurality of rollers and directing the
straight stocks to the bending-back and guidance equipment (G3),
the bending-back and guidance equipment (G3) includes a plurality of bend-back forming
roller guides (G31, G32) for bending back the straight stocks bent by the bending
and guidance equipment (G1) on the upstream side in the laying head direction by a
plurality of rollers (5, 6, 7) to form the straight stocks linearly and guiding the
straight stocks to the laying head, and
the rollers in the respective bend forming roller guides, the rollers in the directing
roller guides, and the rollers in the respective bend-back forming roller guides are
each easily rotatably attached to a roller pin (8) via a bearing part (9),
the roller guides (G11, G12, G31, G32) in the bending and guidance equipment (G1)
and the bending-back equipment (G3) each combine at least three rollers (5, 6, 7),
the straight stocks guiding apparatus being characterized in that,
the combination of the three rollers (5, 6, 7) in each of the roller guides (G11,
G12, G31, G32) is made by two rollers (5, 6) disposed on one side of an upper side
and a lower side and a single roller (7) disposed on the other side,
out of the adjacent bend forming roller guides (G11, G12), the combination of the
three rollers (5, 6, 7) of the roller guide (G11) on one side and the combination
of the three rollers (5, 6, 7) of the roller guide (G12) on the other side are in
a mutually inverted positional relationship, and
out of the adjacent bend-back forming roller guides (G31, G32) the combination of
the three rollers (5, 6, 7) of the roller guide (G31) on one side and the combination
of the three rollers (5, 6, 7) of the roller guide (G32) on the other side are in
a mutually inverted positional relationship.
2. A straight stocks guiding apparatus according to claim 1, wherein the roller guides
in the guidance equipments each include roller eccentricity adjusting mechanisms (12)
for adjusting positions of the rollers.
3. A straight stocks guiding apparatus according to claim 1 or 2, wherein the roller
guides in the guidance equipments are each mounted on a base plate (1) being the supporting
means so as to be replaceable singly.
4. A straight stocks guiding apparatus according to any preceding claim, wherein the
roller guides in all the guidance equipments are the same in constitution.
5. A straight stocks guiding apparatus according to any preceding claim, wherein a member
with a small friction coefficient is used for a bearing (9a) of the bearing part (9).
6. A straight stocks guiding apparatus according to any preceding claim, wherein a resin-made
seal (9c) is disposed on the bearing part (9).
1. Apparat zum Führen gerader Stangen, die durch Rollen an einer Oberseite und Rollen
an einer Unterseite, die fortlaufend in einer Transportrichtung der geraden Stangen
angeordnet sind, von einer Andruckrolle (P) an einen Ablegekopf (H) ausgegeben werden,
wobei der Apparat für gerade Stangen umfasst:
Eine Biege- und Führungsausrüstung (G1), eine Führungsausrüstung für eine Zwischenwalze
(G2) und eine Zurückbiege- und Führungsausrüstung (G3), wobei
alle Führungsausrüstungsteile (G1, G2, G3) konfiguriert sind, von der Andruckrolle
aus auf einer nachgelagerten Seite einer letzten Fertigwalze in einer Warmwalzanlage
bis zu dem Ablegekopf angeordnet zu sein, und vorgesehen sind, die geraden Stangen
zu führen, und die Führungsausrüstung für die Zwischenwalze zwischen der Biege- und
Führungsausrüstung auf der Andruckrollenseite positioniert ist, und die Zurückbiege-
und Führungsausrüstung auf der Ablegekopfseite positioniert ist,
die Biege- und Führungsausrüstung (G1), die Führungsausrüstung für die Zwischenwalze
(G2), und die Zurückbiege- und Führungsausrüstung (G3) an einem Trägermittel (1) montiert
sind,
der Ablegekopf (H) konfiguriert ist, in einer Position angeordnet zu sein, die von
einer Position, die zu der Andruckrolle (P) weist, nach unten verschoben ist, sodass
von der Andruckrolle aus an einer nachgelagerten Seite der Andruckrolle ein Abstand
frei bleibt,
die Biege- und Führungsausrüstung (G1) auf einer vorgelagerten Seite mehrere Biegeformrollführungen
(G11, G12) zum Führen der geraden Stangen durch mehrere Rollen (5, 6, 7) auf die nachgelagerte
Seite und zum Aufbringen einer Biegung umfasst, um das Biegen der geraden Stangen
in einer Richtung des Ablegekopfs zu ermöglichen,
die Führungsausrüstung für die Zwischenwalze (G2) mehrere Lenkungsrollenführungen
umfasst, um die geraden Stangen, die durch die Biege- und Führungsausrüstung (G1)
gebogen wurden, durch mehrere Rollen eine abwärts geneigte Richtung entlang zu führen
und die geraden Stangen zu der Zurückbiege- und Führungsausrüstung (G3) zu führen,
die Zurückbiege- und Führungsausrüstung (G3) mehrere Zurückbiegeformrollenführungen
(G31, G32) umfasst, um die geraden Stangen, die durch die Biege- und Führungsausrüstung
(G1) auf der in der Ablegekopfrichtung vorgelagerten Seite gebogen wurden, durch mehrere
Rollen (5, 6, 7) zurückzubiegen, um die geraden Stangen linear zu formen und die geraden
Stangen zu dem Ablegekopf zu führen, und
die Rollen in den jeweiligen Biegeformrollenführungen, die Rollen in den Lenkungsrollenführungen,
und die Rollen in den jeweiligen Rückbiegeformrollenführungen jeweils leicht drehbar
über ein Lagerteil (9) an einem Rollenstift (8) befestigt sind,
die Rollenführungen (G11, G12, G31, G32) in der Biege- und Führungsausrüstung (G1)
und der Rückbiegeausrüstung (G3) je mindestens drei Rollen (5, 6, 7) kombinieren und
der Führungsapparat für gerade Stangen dadurch gekennzeichnet ist, dass
die Kombination der drei Rollen (5, 6, 7) in jeder der Rollenführungen (G11, G12,
G31, G32) durch zwei Rollen (5, 6), die entweder an einer Oberseite oder an einer
Unterseite angeordnet sind, und eine einzelne Rolle (7), die an der anderen Seite
angeordnet ist, erfolgt,
wobei sich die Kombination der drei Rollen (5, 6, 7) der Rollenführung (G11) auf einer
Seite und die Kombination der drei Rollen (5, 6, 7) der Rollenführung (G12) auf der
anderen Seite bei den angrenzenden Biegeformrollenführungen (G11, G12) in einer zueinander
invertierten Positionsbeziehung befinden und
sich die Kombination der drei Rollen (5, 6, 7) der Rollenführung (G31) auf einer Seite
und die Kombination der drei Rollen (5, 6, 7) der Rollenführung (G32) auf der anderen
Seite bei den angrenzenden Zurückbiegeformrollenführungen (G31, G32) in einer zueinander
invertierten Positionsbeziehung befinden.
2. Führungsapparat für gerade Stangen nach Anspruch 1, wobei die Rollenführungen in den
Führungsausrüstungsteilen jeweils Rollenexzentrizitätseinstellmechanismen (12) umfassen,
um die Positionen der Rollen einzustellen.
3. Führungsapparat für gerade Stangen nach Anspruch 1 oder 2, wobei die Rollenführungen
in den Führungsausrüstungsteilen jeweils so an einer Grundplatte (1) montiert sind,
die das Trägermittel ist, dass sie einzeln ersetzt werden können.
4. Führungsapparat für gerade Stangen nach einem der vorhergehenden Ansprüche, wobei
die Rollenführungen in allen Führungsausrüstungsteilen dieselbe Zusammensetzung aufweisen.
5. Führungsapparat für gerade Stangen nach einem der vorhergehenden Ansprüche, wobei
ein Element mit einem niedrigen Reibkoeffizienten für ein Lager (9a) des Lagerteils
(9) verwendet wird.
6. Führungsapparat für gerade Stangen nach einem der vorhergehenden Ansprüche, wobei
eine Versiegelung (9c) aus Harz an dem Lagerteil (9) angeordnet ist.
1. Appareil de guidage de matériaux droits pour diriger des matériaux droits déchargés
d'un cylindre pinceur (P) vers une tête de pose (H) au moyen de cylindres sur une
face supérieure et de cylindres sur une face inférieure qui sont disposés de manière
contiguë dans la direction de progression des matériaux droits, ledit appareil de
guidage de matériaux droits comprenant :
un équipement de cintrage et de guidage (G1), un équipement de guidage pour laminoir
intermédiaire (G2) et un équipement de cintrage en arrière et de guidage (G3), dans
lequel
tous les équipements de guidage (G1, G2, G3) sont configurés pour être disposés à
partir du cylindre pinceur d'un côté aval d'un laminoir de finition final dans une
ligne de laminage à chaud jusqu'à la tête de pose et sont destinés à guider les matériaux
droits, et l'équipement de guidage pour laminoir intermédiaire est positionné entre
l'équipement de cintrage et de guidage positionné du côté du cylindre pinceur et l'équipement
de cintrage en arrière et de guidage positionné du côté de la tête de pose,
l'équipement de cintrage et de guidage (G1), l'équipement de guidage pour laminoir
intermédiaire (G2) et l'équipement de cintrage en arrière et de guidage (G3) sont
montés sur un moyen de support (1),
la tête de pose (H) est configurée pour être disposée dans une position déplacée vers
le bas depuis une position faisant face au cylindre pinceur (P) avec un espace laissé
à partir du cylindre pinceur sur un côté aval du cylindre pinceur,
l'équipement de cintrage et de guidage (G1), sur un côté amont, comprend une pluralité
de guides à cylindres (G11, G12) de formation de coude destinés à guider les matériaux
droits vers le côté aval via une pluralité de cylindres (5, 6, 7) et donnant une courbure
permettant un cintrage dans une direction de tête de pose aux matériaux droits,
l'équipement de guidage pour laminoir intermédiaire (G2) comprend une pluralité de
guides à cylindres de direction pour guider les matériaux droits pliés par l'équipement
de cintrage et de guidage (G1) le long d'une direction inclinée vers le bas via plusieurs
cylindres et pour diriger les matériaux droits vers l'équipement de cintrage en arrière
et de guidage (G3),
l'équipement de cintrage en arrière et de guidage (G3) comprend une pluralité de guides
à cylindres (G31, G32) formant coude en arrière destinés à couder en arrière les matériaux
droits cintrés par l'équipement de cintrage et de guidage (G1) du côté amont dans
une direction de tête de pose par une pluralité de cylindres (5, 6, 7) pour former
les matériaux droits de manière linéaire et guider les matériaux droits vers la tête
de pose, et
les cylindres dans les guides à cylindres formant coude respectifs, les cylindres
dans les guides à cylindres de direction, et les cylindres dans les guides à cylindres
formant coude en arrière respectifs, sont chacun facilement fixés de manière rotative
à un axe de cylindre (8) par l'intermédiaire d'une partie de roulement (9),
les guides à cylindres (G11, G12, G31, G32) dans l'équipement de cintrage et de guidage
(G1) et l'équipement de cintrage en arrière (G3) combinent chacun au moins trois cylindres
(5, 6, 7), l'appareil de guidage de matériaux droits étant caractérisé en ce que
la combinaison des trois cylindres (5, 6, 7) dans chacun des guides à cylindres (G11,
G12, G31, G32) est réalisée par deux cylindres (5, 6) disposés sur un premier côté
parmi un côté supérieur et un côté inférieur et un seul cylindre (7) disposé sur l'autre
côté,
parmi les guides à cylindres formant cintrage en arrière adjacents (G11, G12), la
combinaison des trois cylindres (5, 6, 7) du guide à cylindre (G11) sur un premier
côté et la combinaison des trois cylindres (5, 6, 7) du guide à cylindres (G12) sur
l'autre côté sont dans une relation positionnelle mutuellement inversée, et
parmi les guides à cylindres formant cintrage en arrière adjacents (G31, G32), la
combinaison des trois cylindres (5, 6, 7) du guide à cylindres (G31) sur un premier
côté et la combinaison des trois cylindres (5, 6, 7) du guide à cylindres (G32) sur
l'autre côté sont dans une relation positionnelle mutuellement inversée.
2. Appareil de guidage de matériaux droits selon la revendication 1, dans lequel les
guides à cylindres dans les équipements de guidage comprennent chacun des mécanismes
de réglage d'excentricité de cylindre (12) pour ajuster de positions des cylindres.
3. Appareil de guidage de matériaux droits selon la revendication 1 ou 2, dans lequel
les guides à cylindre dans les équipements de guidage sont montés chacun sur une plaque
de base (1) constituant le moyen de support de manière à pouvoir être remplacés unitairement.
4. Appareil de guidage de matériaux droits selon l'une quelconque des revendications
précédentes, dans lequel les guides à cylindres de tous les équipements de guidage
ont la même constitution.
5. Appareil de guidage de matériaux droits selon l'une quelconque des revendications
précédentes,
dans lequel un élément à faible coefficient de frottement est utilisé pour un roulement
(9a) de la partie de roulement (9).
6. Appareil de guidage de matériaux droits selon l'une quelconque des revendications
précédentes, dans lequel un joint d'étanchéité en résine (9c) est disposé sur la partie
de roulement (9).