Technical Field
[0001] The present invention refers to an apparatus for cleaning, by abrasion, rod and the
like with scale crust and surface oxide.
Background art
[0002] It is well known that to draw a rod or wire originating from hot-rolling processing,
it is essential to remove the scale that forms during the cooling process and any
surface oxide that may form during storage and transport.
[0003] Nowadays, in order to carry out the surface cleaning, a chemical pickling is performed
using acids that dissolve the oxide. This system, which is the most commonly used,
especially for wires that are highly resistant and which therefore have a high carbon
content, suffer the drawback of being very pollutant and expensive, and hence there
is a pressing need to use alternative systems.
[0004] To this end, as an alternative to the chemical process, mechanical systems are used,
such as scaling with elongation of the outer surface of the rod and consequent detachment
of the crust, brushing of the surfaces with steel wire brushes, surface sandblasting
and the like.
[0005] The system that is currently most widely used is implemented by means of an abrasive
cloth that renders all of the surface cleaned of oxides and scales, resulting in a
surface that is highly compatible with the subsequent drawing operations with powder
lubricants.
[0006] The most widely used solution for processing the mechanical wire involves inserting
the wire or rod into an unwinding system that passes through a hollow shaft and is
pulled, at a known speed, by a device located downstream.
[0007] To carry out the abrasion phase, abrasive cloth supporting spindles are used that
rotate about the wire and which are made to scrape against it with an abrasive effect
at a suitable working speed.
[0008] In practice, at each rotation of the spindle, a length of wire is cleaned that is
equivalent to the width of the abrasive cloth.
[0009] Typically, conventional machines are provided with two spindles which are positioned
at the ends of the machine-body and, in practice, are made up of a central body that
carries the two spindles at its ends.
[0010] The rotation commands are made on the central axis and by means of central transmissions,
which put the two spindles into rotation.
[0011] This type of equipment suffers the drawback that the maintenance is particularly
difficult with regard to the transmissions and, in addition, this type of equipment
is considerably difficult to balance properly.
[0012] Another negative aspect consists in that major difficulties are encountered in keeping
the abrasive cloth centred on the axis of the wire, with additional difficulties in
keeping the cloth centred on the supporting rollers.
[0013] The considerable distance between the two spindles, which are arranged opposite each
other at the ends, inevitably causes a torsion on the wire in the section between
the first spindle and the second spindle, displacing the correct alternation of work
of the cloths, with a consequent cleaning that is not homogeneous.
[0014] Moreover, operator intervention is quite complex, because the operator has to check
two positions that are distant and distinct from each other, not only for changing
the cloths, but also for checking the position of the cloths, and for checking the
parallelism of the rollers.
[0015] A further negative aspect consists in that the central supports are critically important
for their maintenance and design, since they are subjected to loads and vibrations
that are difficult to control, owing to the presence of dynamic instruments or of
different dimensions of the abrasive cloth.
Disclosure of the invention
[0016] The aim of the invention is to solve the aforementioned problems, by providing an
apparatus for cleaning, by abrasion, rod and the like with scale crust and surface
oxide, that makes it possible to considerably simplify the transmissions of movement
both of the central shaft and of the rollers for pulling the cloths, by locating the
two spindles closer to each other.
[0017] Within this aim, an object of the invention is to provide an apparatus that is simple
with regard to balancing and which has self-aligned support bearings in order to reduce
vibrations.
[0018] Another object of the present invention is to provide an apparatus that allows a
rapid and simple assembly and dismantling of the entire apparatus, and which moreover
offers immediate accessibility to the area of intervention by the operator, who can
easily carry out all operations such as threading the wire, changing the abrasive
cloth, centring the abrasive cloths, tensioning the abrasive cloths, further offering
complete visual accessibility to all of the work zone from a single position.
[0019] A further object of the present invention is to provide an apparatus wherein the
configuration and the correction of the parallelism of the rollers that support the
abrasive cloths is easy and effective in such a way that, once set, it remains in
place independently of the speed of rotation.
[0020] A further object of the present invention is to provide an apparatus for cleaning,
by abrasion, rod and the like with scale crust and surface oxide that, thanks to its
distinctive implementation characteristics, is capable of offering the widest guarantees
of reliability and safety in use.
[0021] In accordance with the invention, there is provided an apparatus for cleaning, by
abrasion, rod and the like with scale crust and surface oxide, as defined in the appended
claims.
Brief description of the drawings
[0022] Further characteristics and advantages of the invention will become better apparent
from the description of a preferred, but not exclusive, embodiment of an apparatus
for cleaning, by abrasion, rod and the like with scale crust and surface oxide, illustrated
by way of a non-limiting example in the accompanying drawings wherein:
- Figure 1 is a front elevation view of the apparatus according to the invention;
- Figure 2 is a plan view of the apparatus;
- Figure 3 is a side elevation view of the apparatus;
- Figure 4 is a sectional view taken along the line IV-IV of Figure 1.
Ways of carrying out the invention
[0023] With reference to the figures, the apparatus for cleaning, by abrasion, rod and the
like with scale crust and surface oxide, according to the invention, generally indicated
with the reference numeral 1, comprises a supporting frame 2 on which an assembly
3 is provided for unwinding a wire or rod which is inserted into a central shaft,
indicated with the reference numeral 10 and which passes inside a rotating body, indicated
with the reference numeral 11 and which supports a first spindle 20 and a second spindle
21, which are integrally connected and mutually opposing, in that they are directed
toward each other and are each supported by a supporting disk, indicated with the
reference numeral 22. The disks 22 are connected to a central support 23, which is
integrally defined inside the apparatus and which is obtained with cradle-like seats,
at a work zone 30, which can be closed from above by an openable cover 31 which, in
practice, closes the fairing that defines the frame.
[0024] The supporting disks 22 are joined by tension members 25 which render the two spindles
mutually integral.
[0025] For the actuation, a first motor 40 is provided for turning the spindles, such motor,
by means of a belt transmission mechanism 41, is connected to a lower transmission
shaft 42 which is connected to a second transmission mechanism 43 which is connected
to the other spindle.
[0026] In this way, the motor is able of simultaneously actuating the rotation of the rollers
26 of both spindles, which support an abrasive cloth 27.
[0027] Another motor 50 is provided, which rotates about the axis of the rotating body and
which, by way of a transmission through the central body 51, puts the rotating body
11 in rotation on the support 23.
[0028] With this arrangement all the movements are located outside the rotating body on
which the spindles are positioned, while the spindles, which are integrally joined
to each other, are opposite and at a reduced mutual distance from each other.
[0029] Moreover, in order to allow an easy alignment of the rollers of the spindles, supporting
arms 60 are provided which, in practice, make the parallelism rigid between the two
rollers for pulling the abrasive cloths, and are unaffected by centrifugal effects;
moreover, a system for the fine adjustment of the parallelism of the rollers 26 is
provided on the arms 60.
[0030] Moreover it should also be noted that it is possible to have a single central suction
assembly 61, located in the area affected by the spindles, which easily removes all
the residues of processing, so preventing the several support bearings from becoming
worn.
[0031] From the foregoing it can thus be seen how the invention achieves the intended aim
and objects, and in particular attention is drawn to the fact that an apparatus is
provided in which the spindle supporting assembly is monolithic and has supports at
its ends, hence it is not subject to imbalances, and it has a rigid parallelism between
the rollers that enables an optimal positioning of the cloths and improved working
conditions.
[0032] Moreover, the positioning of the rollers inside the transmission assemblies, which
are located at the ends of the hollow central shaft, makes it possible to reduce the
distance between one spindle assembly and the other, thereby minimizing the processing
defects that are due to torsion of the wire.
[0033] The use of a single work zone gives the operator better control and simplifies both
the structure and all the connected operative elements.
[0034] The invention, thus conceived, is susceptible of numerous modifications and variations,
all of which are within the scope of the appended claims.
[0035] Moreover, all the details may be substituted by other, technically equivalent elements.
[0036] In practice the materials employed, provided they are compatible with the specific
use, as well as the dimensions and the contingent shapes, may be any according to
requirements.
[0037] Where technical features mentioned in any claim are followed by reference signs,
those reference signs have been included for the sole purpose of increasing the intelligibility
of the claims and accordingly such reference signs do not have any limiting effect
on the interpretation of each element identified by way of example by such reference
signs.
1. An apparatus (1) for cleaning, by abrasion, rod and the like with scale crust and
surface oxide, comprising, on a supporting frame (2), an assembly (3) for unwinding
a wire or rod (F) on the surface of which a first abrasive cloth supporting spindle
(20) and at least one second abrasive cloth supporting spindle (21) act, said first
spindle (20) and said at least one second spindle (21) comprising two rollers (26)
for supporting and pulling the abrasive cloths, said first spindle (20) and said at
least one second spindle (21) being accommodated within a work zone (30) defined by
said supporting frame (2), and the apparatus further comprising a hollow central shaft
(10) for the passage of said rod or wire (F) within a rotating body (11), which supports
said first spindle (20) and said at least one second spindle (21), the apparatus being
characterized in that said first spindle (20) and said at least one second spindle (21) are directed toward
each other and are integrally connected.
2. The apparatus according to claim 1, characterized in that said rotating body (11) comprises, at the axial ends, supporting disks (22) which
are joined by tension members (25) and supporting said first spindle (20) and said
at least one second spindle (21).
3. The apparatus according to one or more of the preceding claims, characterized in that it comprises a single openable cover (31) arranged so as to close said work zone
(30).
4. The apparatus according to one or more of the preceding claims, characterized in that it comprises a first motor (40) which turns said first spindle (20) and said at least
one second spindle (21).
5. The apparatus according to claim 4, characterized in that said first motor (40) is connected to said first spindle (20) for the rotation of
the rollers (26) that support the abrasive cloth (27) and, by means of a transmission
mechanism (41), to a lower transmission shaft (42) connected to a second transmission
mechanism (43) for the actuation of the rollers (26) that support the abrasive cloth
(27) of said at least one second spindle (21).
6. The apparatus according to one or more of the preceding claims, characterized in that it comprises a motor (50) for turning said rotating body (11) by means of a transmission
(51) for the rotating body to said rotating body supported by a cradle-like support
(23) defined by said supporting frame (2).
7. The apparatus according to one or more of the preceding claims, characterized in that it comprises supporting arms (60) for the connection of the end of the rollers (26)
of said spindles (20, 21) that lies opposite the end connected to said supporting
disks (22).
8. The apparatus according to one or more of the preceding claims, characterized in that it comprises a central suction assembly (61) arranged at said work zone (30).
1. Eine Vorrichtung (1) zum Reinigen, durch Abrieb, von Stangen und dergleichen mit Schuppenkruste
und Oberflächenoxid, die an einem Stützrahmen (2) eine Baugruppe (3) zum Abwickeln
eines Drahts oder einer Stange (F) umfasst, auf dessen bzw. deren Oberfläche eine
erste, ein Abriebtuch tragende Spindel (20) und zumindest eine zweite, ein Abriebtuch
tragende Spindel (21) einwirken, wobei die erste Spindel (20) und die zumindest eine
zweite Spindel (21) zwei Rollen (26) zum Tragen und Ziehen der Abriebtücher umfassen,
wobei die erste Spindel (20) und die zumindest eine zweite Spindel (21) innerhalb
eines Arbeitsbereichs (30) untergebracht sind, der durch den Stützrahmen (2) bestimmt
ist, und wobei die Vorrichtung ferner einen hohlen zentralen Schaft (10) für den Durchgang
der Stange oder des Drahts (F) innerhalb eines Drehkörpers (11) umfasst, der die erste
Spindel (20) und die zumindest eine zweite Spindel (21) trägt, wobei die Vorrichtung
dadurch gekennzeichnet ist, dass die erste Spindel (20) und die zumindest eine zweite Spindel (21) zueinander hin
gerichtet sind und integral verbunden sind.
2. Die Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Drehkörper (11) an den axialen Enden tragende Scheiben (22) umfasst, die durch
Spannungsglieder (25) verbunden sind und die erste Spindel (20) und die zumindest
eine zweite Spindel (21) tragen.
3. Die Vorrichtung gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine einzelne, zum Öffnen fähige Abdeckung (31) umfasst, die derart angeordnet
ist, dass sie den Arbeitsbereich (30) schließt.
4. Die Vorrichtung gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen ersten Motor (40) umfasst, der die erste Spindel (20) und die zumindest
eine zweite Spindel (21) dreht.
5. Die Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass der erste Motor (40) mit der ersten Spindel (20) zur Drehung der Rollen (26), die
das Abriebtuch (27) tragen, und mittels eines Getriebemechanismus (41) mit einer unteren
Getriebewelle (42), welche mit einem zweiten Getriebemechanismus (43) verbunden ist,
zur Betätigung der Rollen (26), die das Abriebtuch (27) der zumindest einen zweiten
Spindel (21) tragen, verbunden ist.
6. Die Vorrichtung gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Motor (50) zum Drehen des Drehkörpers (11) mittels eines Getriebes (51)
für den Drehkörper zum Drehkörper umfasst, getragen durch einen schlittenartigen Träger
(23), der durch den Stützrahmen (2) bestimmt ist.
7. Die Vorrichtung gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Tragarme (60) für die Verbindung des Endes der Rollen (26) der Spindeln (20,
21) umfasst, das dem Ende gegenüberliegt, welches mit den tragenden Scheiben (22)
verbunden ist.
8. Die Vorrichtung gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine zentrale Saugbaugruppe (61) umfasst, die am Arbeitsbereich (30) angeordnet
ist.
1. Appareil (1) destiné à nettoyer, par abrasion, une tige et analogue ayant une croûte
de tartre et un oxyde de surface, comportant, sur un bâti de support (2), un ensemble
(3) pour dérouler un fil ou une tige (F) sur la surface duquel agissent une première
broche de support de toile abrasive (20) et au moins une seconde broche de support
de toile abrasive (21), ladite première broche (20) et ladite au moins une seconde
broche (21) comportant deux rouleaux (26) pour supporter et tirer les toiles abrasives,
ladite première broche (20) et ladite au moins une seconde broche (21) étant reçues
à l'intérieur d'une zone de travail (30) définie par ledit bâti de support (2), et
l'appareil comportant en outre un arbre central creux (10) pour le passage de ladite
tige ou dudit fil (F) à l'intérieur d'un corps rotatif (11), qui supporte ladite première
broche (20) et ladite au moins une seconde broche (21), l'appareil étant caractérisé en ce que ladite première broche (20) et ladite au moins une seconde broche (21) sont dirigées
l'une vers l'autre et sont reliées d'un seul tenant.
2. Appareil selon la revendication 1, caractérisé en ce que ledit corps rotatif (11) comporte, aux extrémités axiales, des disques de support
(22) qui sont réunis par des éléments de tension (25) et supportant ladite première
broche (20) et ladite au moins une seconde broche (21).
3. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte un capot unique pouvant s'ouvrir (31) agencé de manière à fermer ladite
zone de travail (30).
4. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte un premier moteur (40) qui fait tourner ladite première broche (20) et
ladite au moins une seconde broche (21).
5. Appareil selon la revendication 4, caractérisé en ce que ledit premier moteur (40) est relié à ladite première broche (20) pour la rotation
des rouleaux (26) qui supportent la toile abrasive (27) et, au moyen d'un mécanisme
de transmission (41), à un arbre de transmission inférieur (42) relié à un second
mécanisme de transmission (43) pour l'actionnement des rouleaux (26) qui supportent
la toile abrasive (27) de ladite au moins une seconde broche (21).
6. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte un moteur (50) pour faire tourner ledit corps rotatif (11) au moyen d'une
transmission (51) pour le corps rotatif vers ledit corps rotatif supporté par un support
analogue à un berceau (23) défini par ledit bâti de support (2).
7. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte des bras de support (60) pour la liaison de l'extrémité des rouleaux (26)
desdites broches (20, 21) qui se situe à l'opposé de l'extrémité reliée auxdits disques
de support (22) .
8. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte un ensemble d'aspiration central (61) agencé sur ladite zone de travail
(30).