FR2577540A1 - Device for entraining metal wires, applicable especially to machines for processing filiform elements - Google Patents

Abstract

The subject of the invention relates to the technical sector of shaping and, more particularly, to the mechanical working and processing of the metal wires. This device comprises, suitably mounted on a support 8, two superimposed systems S1 and S2 positively slaved (servo-controlled) in rotation, the wire to be processed being cable of being engaged between the said systems which have means shaped so as to allow the entrainment and the guiding of the wire in combination with one or more bearing pads 13 which act on part of the said means 6-7.

Description

The invention relates to a device for driving metal wires

  applicable in particular to machines for

treatment of filiform elements.

  The object of the invention relates to the technical sector of shaping and more particularly to mechanical work and

treatment of metal wires.

  There are known machines for straightening, measuring and cutting irons for various applications. Generally, these machines include a roller carrier assembly for iron pressing and a mechanical assembly for driving the iron, between

  the two assemblies being arranged, depending on the nature of the wire to be treated

  ter, one or more shaped means to ensure the straightening of the wire.

  There appear to be drawbacks on the part of the training.

  wire and, on the other hand, at its level.

  Regarding the drive, the latter is most often carried out by means of superposed rotating rollers. There is frequently a slippage of the rollers on the driven object, which turns out to be an important drawback when we consider that it appeared necessary to program the end stops in order to cut the iron or other, at will, in different lengths.

  The temporary non-entrainment of the iron resulting from pati-

  swimming, generates a non-negligible error at the level of the grip

of measure.

  Regarding the straightening of the iron, one can use either a rotating frame with specific internal arrangements or several rotating rollers arranged alternately on either side of the iron and regularly offset with respect to the axis

  according to a sinusoid of variable amplitude. But then again

  feels inconvenience. The rotation of the frame around the wire has the effect of causing a localized heating on said iron likely to alter its resistance characteristics in particular. The results obtained by the use of alternating rollers are not satisfactory taking into account the phenomenon of slippage on the one hand, and the contact zones of the iron with the

  pebbles which are relatively distant on the other hand.

  -2- The problem being thus posed, the invention set itself as a goal in a simple, efficient and rational manner. the creation of a consistent and agern device for autrisLer

  training without skating the irons and allowing their r-edrem-

  wise by suppressing the phenomenon of overheating. To this end, the device is remarkable in that it comprises, suitably mounted on a support, two superimposed systems positively controlled in rotation, the wire - treat

  being likely to be engaged between said dock systems --oem-

  tent shaped means to allow the drive and Ioe guide the wire in combination with one or more pads dl'ui support

act on part of the means.

  The invention is set out below in more detail a 'a (e

  drawings which represent only one mode of execution.

  Figure 1 is, schematically and as an indicative example in no way limiting, a front view of a machine core for the treatment of filiform elements on lmameRIe

  is mounted the device according to the invention.

  FIG. 2 is, on a larger scale, the same wme from the front of the device according to a first form of embodiment.

  especially for linear iron drive.

  FIG. 3 is a front view of the device sel1 me another embodiment, in particular for driving and

simultaneous straightening of the iron.

  Figure 4 is a cross-sectional view cosr

along line 4-4 of Figure 2-

  Figure 5 is a cross-sectional view commIdeiee along line 55 of Figure 2; In order to make the object of inventioam sn more concrete

  now describes it in a nonlimiting manner, by T-

  rant to the embodiments illustrated in the drawings of the drawings.

  The device includes, suitably mointed on a smporTt

  vertical and / or horizontal (8), two smperpo- drive systems

  sés (S1) and (S2) each composed from at least two pifmoms (2) (3) and (4) - (5) connected by a transmission member for

  the training of the wire to be treated engaged between said systems.

  - 3 Each pair of sprockets (2) - (3) and (4) - (5) is connected by an endless chain (6) and (7). The pinions (2) - (3) and (4) - (5) are preferably arranged in axial alignment, while the superimposed pinions (2). (4) and (3) - (5) are arranged in the same axial alignment. As a result, the chain strands (6) and (7) extend

  parallel to each other.

  Each chain drive system thus formed is positively driven in rotation. For example, at least one of the pinions of one of the pairs is connected to a drive member, while a conventional transmission system of any known type

  and appropriate ensures mating with the other pair of Dignon.

  At least one of the pairs of sprockets (4) - (5) is driven on a guide (8b) adjustable in height to vary the spacing between the overlapping strands of the two chains, For example, the guide (8b) is stressed in adjustable pressure by an elastic member (0) subject to a handwheel (V) (Figure 2),

  said guide being mounted to slide freely on an appropriate part

  requested from the support (8). The other gear pair (2) - (3) is

  mounted on a fixed or mobile guide (8a).

  According to an important characteristic of the invention,

  l break chains (6) - (7) are arranged to ensure in combination

  are the drive of the wire to be treated (F), without slippingo For this purpose, each link (6a) - (7a) is equipped with support lugs (9) - (10) on which soles (11) are fixed - (12) in any material depending on the nature of the threadlike object to be driven. The soles (11) and (12), at the level of the strands of chains superimposed in an almost tangent manner, are arranged opposite and in axial alignment and constitute in combination 3 (a drive tunnel. Optionally, each of the soles ( 11) and (12) can have a hollow recess axially

  of shape complementary to that of the filiform object (F) to

  hang out. To avoid any risk of slipping of all of the soles (11) and (12) on the wire (F) when the chains (6) and (7) are in motion, not only is it necessary to correctly tension each of the strands , but at least one of the strands at the drive of the element (F) must be subject to one or more support pads (13) whose function is to compensate for any distension of the chain strands. For this purpose, the pad (s) (13) are positioned between the pinions (2)

  - (3) and / or (4) - (5) and have a support profile (13a) con-

  formed to cooperate with rollers or tubes (-6b) and / or (7b)

  chain links (6) and / or (7).

  Each shoe (13) is mounted, in an adjustable manner, in height on the guides (8a) or (8b) receiving the pinion torque.

  corresponding. For example, the body of the pad (s) (13) pre-

  feel oblong slots (13b) cooperating with assembly members (16) screwed into the thickness of the corresponding guide (8a) or (8b) being subject to pressure members (14) for their height adjustment and concomitantly their support on

  the corresponding parts of the links.

  The support profile (13a) of the pads (13) and positions it

  ment of said pads with respect to the generators of the filiform object.

  me (F) to be treated, directly depend on the operation that one wishes to perform. For this purpose, it is necessary to distinguish a simple linear drive of the wire (F) and a drive combined with a dressing. Depending on the desired application, simply change

  skates and change their relative positioning.

  FIG. 2 illustrates an embodiment in no way limiting of the device in the case of the linear drive of the wire (F) without pre-braiding of the latter. For this purpose, the support profile (13a) of the pad (s) (13) is rectilinear, the pad (s) being positioned on the same axial alignment, parallel

  to the generators of the wire to be driven.

  In the hypothesis where the support (8) is arranged vertically, it may be sufficient for the pad (s) (13) to be arranged only on the lower guide (8a) supporting the pair of pinions (2) - (3) connected by the chain (6); the chain (7) of the other pair of pinions (4) - (5) can be subjected to a tensioning member (15) of any known and appropriate type. It therefore follows that the parallel strand opposite the two chains - 5 (6) - (7) equipped respectively with their support and guide sole (11) and (12) are not deformed and relaxed during the passage of the wire (F), but directly to the contrary in permanent and continuous contact with said wire, thus eliminating any sliding effect. The embodiment shown in Figures 1 and 3 corresponds to a drive of the wire (F) combined with a dressing of the latter. For this purpose, the support profile (13a) of the pads

  (13) constitutes an arc of a circle with a determined radius of curvature.

  The pads are arranged on each of the support guides (8a) and (8b) in the same axial alignment but being regularly and alternately offset with respect to the generatrices of the filiform object to be treated so as to constitute, by their profile in arc of a circle a sinusolde the amplitude of which can vary taking into account the relative positioning of said pads on their respective support. It follows that the parallel strands opposite the two chains (6) - (7) respectively equipped with their support sole (11) and (12) describe a sinusoidal curve. In the same way as for the previous embodiment, the chain strands are not

  not relaxed and deformed during the passage of the wire (F) but remain

  come into permanent and continuous contact throughout the sinusoid thus formed resulting from the profile and positioning of the pads

  support (13). Any risk of slipping is therefore sup-

  awarded, the facing pads being alternately arranged according to

  a determined interval, so that there is no disconti-

  in the contact areas of the rollers or tubes of the chain

  with the pad support profiles (13.).

  As in the previous embodiment, each of the chains (6) and (7) can be subjected to tensioning members (15). Note that the contact of the support pads on the links of the

  corresponding chains (6) and (7) do not affect the proper functioning

  ment of all transmission systems, given that said pads are supported on rollers or rotating tubes

said Maillongs.

  In an alternative embodiment, the transmission by chain

  - 6 - cannot be replaced by a belt drive. To this end, the chains (6) - (7) are replaced by toothed belts meshing with cenned pulleys. In this case, the support profile of the pads (13) cooperating with the notches of the strands of the belts, is shaped and / or arranged with means such as needle stops capable of being driven in

  rotation under the effect of movement and advance of the belts.

  The device thus executed can be mounted on any type of machine intended for straightening, measuring and cutting or otherwise

  treat the irons used in masonry or other filiform objects

  various profile shapes for any application. The whole device can be arranged either vertically

  (figures of the drawings), either horizontally or for improvement

  the straightening of the iron, the two transmission systems are

  successively arranged in a vertical and horizontal plane.

  The invention is in no way limited to that of its modes of application any more than to those of the embodiments of its various parts which have been more particularly indicated;

  on the contrary, it embraces all its variants.

-7

Claims (6)

  -1- Metal wire drive device applicable in particular to machines for the treatment of filiform elements, characterized in that it comprises suitably mounted on a   support (8) two superimposed systems (S1) and (S2) positively controlled   tively in rotation, the wire to be treated being capable of being engaged between said systems which have shaped means for authorizing the driving and guiding of the wire in combination with one or more support pads (13) which act on a part said medium (6 - 7).   -2- Device according to claim 1, characterized in that each system (Si) and (S2) is composed from at least two toothed members (2) - (3) and (4) - (5) connected by pair by the transmission means (6) - (7), said toothed members being suitably positioned so that the strands of each i5 means (6) - (7) are positioned parallel to each other, said strands being arranged to ensure in combination   the drive of the wire to be treated, without slipping.   -3- Device according to claim 2, characterized in that the transmission means between the pairs of toothed members (2) - (3) and (4) - (5) are respectively chains without   end (6) - (7), said members being pinions.   -4- Device according to claim 2, characterized in that the transmission means between the pairs of toothed members   (2) - (3) and (4) - (5) are respectively belts   tees, the said members being fluted pulleys.   -5- Device according to claim 2, characterized in that each link (6a) - (7a) of the means (6) and (7) in the form of chain, is equipped with support legs (9) - (10) on which are fixed soles (11) - (12) which, at the level of the strands 3C facing superimposed chains are arranged in a position of almost tangency and in axial alignment to constitute a -8- wire drive tunnel (F).   -6- Device according to claim 5, characterized in that at least one of the strands, at the wire drive (F) is subject to the support pads (13) positioned between the pinions (2 - 3) and / or (4 - 5), said pads having a support profile (13a) shaped to cooperate with the rollers or tubes (6b) and / or (7b) of the chain links (6) and / or ( 7). -7- Device according to claim 6, characterized in that each shoe (13) is mounted, in a manner adjustable in height,   on a guide (8a) and / or (8b) receiving the pair of corresponding pinions   laying, one or each of said guides being itself mounted with limited displacement capacity on the support (8) while being subject to control means for varying the spacing   between the strands facing the chains.   -8- Device according to claim 7, characterized in that the support profile (13a) of the pad (s) (13) is rectilinear, the said pad (s) being positioned on the same axial alignment parallel to the generatrices of the wire to be driven, the pad (s) (13), in the case of a vertical support, is arranged on at least the lower guide (8a) supporting the pinions   (2) - (3), the chain (7), of the other pair of sprockets (4) -   (5) being subject to a tensioning member (15).   -9- Device according to claim 7, characterized in that the support profile (13a) of the pads (13) constitutes an arc of a circle of determined radius of curvature, the pads being arranged   on each of the support guides (8a) and (8b) along the same alignment-   axially but by being regularly and alternately shifted   strips relative to the generatrices of the wire to be treated so as to constitute, in combination with the arcuate profile,   a sinusoid of variable amplitude so that the strands parallel-   next to the two chains (6) - (7) respectively equipped -9-   ment of their sole (11) and (12) describe a drive path sinusoidal.   -10- Device according to claim 9, characterized in that   that the pads (13) facing the guides (8a) and (8b) are regular   alternately, according to a determined interval so that there is no discontinuity in the contact zones of the links   chains with the support profiles (13a) of the pads (13).