JPH0623962U - Wire feeding device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a device that feeds a wire rod to a forging machine by rotating the feed roller, even if the feed roller rotates while the tip of the wire rod comes into contact with a stopper, the wire rod will be scratched. Do not enter. [Structure] The first and second ring members 22, 23 are attached to the convex base portion 17 of the roll shaft 14 by sandwiching the feed roller 13 between these ring members 22, 23, and
An adjusting bolt 34 that comes into contact with the tip surface of the convex base portion 16 from the ring member 23 side is provided, and by adjusting the distance between the first and second ring members 22 and 23 by the adjusting bolt 34, contact with the feed roller 13 is performed. By adjusting the pressure, wire x
The feed roller 13 slips with respect to the first and second ring members 22 and 23 when stopped.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for feeding a wire material in a fixed amount to a wire material processing device such as a forging machine.

[0002]

[Prior art]

 A forging machine for forming bolts, nuts, and other various parts is a forging station equipped with dies and punches that face each other from the material supplied from the side of the machine base. It is a product that continuously manufactures products of a predetermined shape by processing, but in the forging machine, a wire rod made of a bar material or a wire wound in a coil shape on the side of the machine base. And feed it to the machine base by one or more pairs of feed rollers that sandwich and rotate the wire rod, and cut this wire rod from the tip to a certain size on the machine base side and carry it into the forging station. Is configured.

By the way, in the above-mentioned cutting of the wire rod on the machine base side, normally, the cut wire rod having a certain size is always obtained by cutting the supplied wire rod in a positioning state in which the tip of the wire rod is brought into contact with the stopper. There is. Therefore, when the wire is fed by the above-mentioned feed roller, the feed amount is set to be slightly excessive so that the tip of the wire reliably contacts the stopper. For this reason, the feed roller may rotate even though the tip of the wire rod contacts the stopper. In that case, the feed roller slips and rotates with respect to the wire rod. There is a risk that slip marks may enter the wire as scratches and remain on the surface of the product, resulting in deterioration of product quality.

As a technique for solving this, for example, in Japanese Utility Model Laid-Open No. 2-44916, a ring-shaped feed roller having an inner diameter larger than the outer diameter of a disc body provided on a roller shaft is provided to form a disc. A feed roller device is disclosed in which the outer peripheral surface of the body and the inner peripheral surface of the feed roller are fitted in a concave and convex shape on the pinching side of the wire.

According to this, since the rotational force of the roller shaft is transmitted at the portion where the disc body and the feed roller are fitted in the recess and projection, when the wire rod comes into contact with the stopper and stops, the feed roller is stopped. The disc body slips and rotates with respect to the feed roller due to the frictional force acting between the wire and the wire. As a result, the feed roller does not rotate and it is possible to prevent scratches on the surface of the wire.

[0006]

[Problems to be solved by the device]

 By the way, in the above technology, the frictional force at the concave-convex fitting portion between the feed roller and the disc body is set to a value that can reliably feed the wire rod, and the wire rod and the feed roller when the wire rod is stopped. It is necessary to make the slip rotation of the disk body relative to the feed roller smooth as a friction force smaller than the friction force acting between the rollers. However, even if these conditions are satisfied when the feed roller is set, wear due to slip rotation will occur on the feed roller and the disc body over a long period of use, and the frictional force will change, and the wire material, etc. Since the frictional force also changes depending on the condition, there is a possibility that the above-mentioned technique may cause inaccurate feeding of the wire.

Therefore, an object of the present invention is to provide a wire rod supply device capable of coping with a change in frictional force due to wear or the like and always reliably feeding the wire rod.

[0008]

[Means for Solving the Problems]

 That is, the present invention is an apparatus for sandwiching a wire rod by at least a pair of feed rollers supported by roller shafts and supplying the wire rod to a predetermined wire rod processing position by the rotation of these feed rollers. A taper surface is formed at the fitting portion between the feed roller and the feed roller, and the feed roller fitted to the roller shaft is held by pressing the feed roller against the taper surface by an axial tightening force, and the feed roller is rotated. When a forced stopping force acts on the wire rod during the supply of the wire rod by the above, slip does not occur between the wire rod and the feed roller, and the roller shaft slips and rotates with respect to the feed roller. An adjusting means for adjusting the tightening force is provided.

[0009]

[Action]

 According to the above configuration, the feed roller is held by being pressed against the tapered surface provided on the roller shaft by the axial tightening force, and the wire is fed to the tape while the wire is being supplied by the rotation of the feed roller. Since the adjusting means is provided to adjust the tightening force so that the roller shaft slips and rotates with respect to the feed roller when the forcible stopping force is applied, when the wire rod is forcibly stopped by the adjustment. The roller shaft can be reliably slip-rotated with respect to the feed roller.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In the press molding machine 1 shown in FIG. 1, a ram 3 which is reciprocally driven by a crank mechanism (not shown) is provided at a predetermined position of a machine base 2, and a plurality of punches 4 to 4 are attached to the front surface of the ram 3. A plurality of dies (not shown) facing the punches 4 to 4 are provided in the die block 5 arranged to face the punches 4 to 4. The die and the die form a forging station S.

On the other hand, behind the forging station S, a wire rod support mechanism 6 in which the wire rod bundle X wound in a coil shape is loaded is provided. The wire rod support mechanism 6 is not particularly limited to the structure shown in FIG. 1, but is provided with a base 8 movable along the guide rails 7, 7 and rotatable and vertically movable on the base 8. And a supporting table 9 for supporting the above-mentioned wire rod bundle X, and the wire rod x drawn out from the wire rod supporting mechanism 6 is transferred to the rear part of the machine base 2 of the press forming machine 1 via the wire rod supplying device 10. It is adapted to be supplied to the forging station S side through the wire rod inlet 11 provided.

Then, on the side of the forging station S, the supplied wire rod x is cut into a certain size by a cutter with its tip abutted against a stopper (not shown), and then the cut wire rod is also transferred to a cutting wire rod (not shown). The punches 4 to 4 are conveyed in parallel to each other by means of the means, and during this time, the punches 4 and the dies are stepwise forged from rough to fine to form a product having a predetermined shape. .

In that case, in the above-described wire rod supply device 10, a pedestal 12 is provided, and a plurality of (two in the drawing) feed roller pairs, each of which is composed of a pair of upper and lower feed rollers 13 and 13 in the wire rod transfer direction on its side surface. The wire rod x is sandwiched between these feed roller pairs from above and below, and is intermittently rotated from the feed rollers 13 and 13 to be drawn out from the wire rod bundle X and supplied to the above-mentioned wire rod inlet 11.

The above feed rollers 13 and 13 are rotatably supported on the pedestal 12 as shown in FIGS. 2 and 3, and are upper and lower roller shafts rotated by an intermittent drive mechanism (not shown) inside the pedestal 12. In this case, each of the feed rollers 13 and 13 is formed from a ring member having an inner peripheral surface formed into a substantially V-shaped surface 13a and a semicircular wire guide groove 15 formed on the outer peripheral surface. The roller shaft 14 is configured and fitted and fastened to the roller shaft 14.

That is, the flange portion 16 is provided at the tip of the roller shaft 14 and the convex base portion 17 is formed at the tip surface of the flange portion 16. Then, as shown in FIG. 3 and FIG. 6, two positioning pins 18, 18 are screwed and attached to the flange portion 16 at 180-degree opposite positions sandwiching the convex base portion 17, and at the same time, the convex base portion 17 is attached. A plurality of screw holes 19 to 19 are formed in an annular position centering on the center of the center, and a plurality of screw holes 20 (see FIG. 5) are also formed on the front end surface of the convex base portion 17. 21 to 21 are screwed in the protruding state.

On the other hand, as ring-side members for fastening the feed roller 13, two ring members 22 and 23 (hereinafter, referred to as a first ring member 22 and a second ring member 23, which are fitted to the convex base portion 17 are used. And a cover plate 25 and a cover plate 25 which are pressed against the second ring member 23.

Tapered surfaces 22 a and 23 a are formed on the outer peripheral surfaces of the first and second ring members 22 and 23, respectively. When these ring members 22 and 23 are fitted to the convex base portion 17, The tapered surfaces 22a and 23a of both ring members 22 and 23 form a substantially V-shaped annular groove that matches the V-shaped surface 13a of the feed roller 13.

Further, the first and second ring members 22 and 23 are respectively provided with two pin holes 26 and 27 corresponding to the positioning pins 18 and 18 of the flange portion 16 of the roller shaft 14. In addition, the same number of fixing bolt through holes 28 (see FIG. 4) are opened in the first ring member 22 so as to face the plurality of screw holes 19 formed in the flange portion 16, and the second ring member A through hole 30 into which a head portion of a bolt 29 passed through the fixing bolt through hole 28 is fitted is formed in 22.

Further, on the inner peripheral portion of the second ring member 23, a step portion 31 is formed at a corner portion on the side facing the first ring member 22 (that is, on the back side), and the step portion 31 is formed on the inner peripheral portion. The lid plate 25 having a shape having a flange portion 25a that engages with the portion 31 is fitted, the above-mentioned contact plate 24 is applied from the front side, and the plate 24 and the cover plate 25 are bolted 32, 32 (correspondingly). 2 and 7), the contact plate 24 and the cover plate 25 are attached to the second ring member 23. In that case, the second ring member 23 is loosely clamped so that the contact plate 24 and the cover plate 25 can be rotated relative to the second ring member 23.

Further, the backing plate 24 is provided with a plurality of fastening bolt through holes 33 to 33 through which the heads of the fastening bolts 21 to 21 screwed to the convex base portion 17 can be inserted, and A plurality of adjusting bolt through holes 35 to 35 for abutting the fastening force adjusting bolts 34 1 to 34 3 to the tip end surface of the convex base 17 through the 2 ring member 23 are opened. Therefore, the second ring member 23 has a through hole 36 (see FIG. 5) for inserting the fastening bolts 21 to 21 and a screw hole 37 (for inserting and screwing the adjusting bolts 34 to 34 into the second ring member 23). (See FIG. 4) and are established.

In that case, the shape of the former fastening bolt through holes 33 to 33 is a large hole portion 33a having a diameter larger than the head diameter of the fastening bolt 21 to be passed through the hole 33 and a diameter slightly larger than the bolt shaft diameter. The small hole portion 33b is in communication with the small hole portion 33b. This will be described in detail later, but with the second ring member 23, the contact plate 24, and the cover plate 25 connected, by rotating the contact plate 24, the roller shaft 14 of these members 23, 24, 25 is moved. When the wire rod x is fed in the direction of the arrow a in FIG. 2, the small hole 33b is located on the arrow direction side. ing. In preparation for such rotation, the shape of the latter adjusting bolt through holes 35 to 35 is an arc-shaped oblong hole having an angle within the range allowing the above rotation. A handle 38 is attached to the backing plate 24 using the bolt 32 for connecting the plate 24 and the cover plate 25 to the above-described rotation operation.

Next, a method of attaching and detaching the feed roller 13 will be described.

First, as shown in FIG. 7, with the fastening bolts 21 screwed into the respective screw holes 20 provided in the convex base portion 17 of the roller shaft 14 by a predetermined amount, the first ring member 22 is positioned. And the pin hole 27 are positioned and attached to the convex base portion 17, and the fixing bolt 29 is screwed into the screw hole 19 of the flange portion 16 from the bolt through hole 28 of the first ring member 22 to fix the first bolt member. The ring member 22 is fixed to the roller shaft 14. At this time, the fixing bolt 29 is screwed in by covering the bolt head with a cap 39 so that the cap 39 functions as a positioning pin for the second ring member 23.

On the other hand, the backing plate 24 and the lid plate 25 are previously attached to the second ring member 23 by the bolts 32, 32 to block these members 23, 24, 25, and the second ring member 23 The adjusting bolts 34 are screwed into the provided screw holes 37 from the bolt through holes 35 of the contact plate 24, and the tips of the adjusting bolts 34 to 34 are projected to the back side of the second ring member 23 for a certain amount.

Then, from the state where the feed roller 13 is fitted in the first ring member 22 described above, the positioning bin 18 inserted into the pin hole 26 of the first ring member 22 is inserted into the pin hole 27 of the second ring member 23. When the cap 39 is fitted and the cap 39 is fitted in the through hole 30, the fastening bolts 21 to 21 screwed to the tip surface of the convex base portion 17 in the contact plate 24 are attached to the second ring member 23. The above block is attached to the convex base portion 17 so that the large hole portions 33b to 33b of the fastening bolt through holes 33 to 33 are inserted through the through holes 36 of FIG. After rotating the shaft portion of the fastening bolts 21 to 21 into the small hole portion 33b of the bolt through hole 33 by rotating in the direction opposite to the arrow a direction, the fastening bolts 21 to 21 are tightened. .

By this tightening, the tips of the adjusting bolts 34 to 34 come into contact with the front end surface of the convex base portion 17, so that the abutting plate 24 exerts an attractive force toward the convex base portion 17 side. However, the second ring member 23 is also attracted to the first ring member 22 side, so that the feed roller 13 is sandwiched between the ring members 22 and 23, and the V-shaped surface 13a of the feed roller 13 and the The tapered surfaces 22a and 23a of the first and second ring members 22 and 23 are in close contact with each other, and the three members 13, 22 and 23 are fastened. Therefore, when the roller shaft 14 is rotated, the feed roller 13 and the first and second ring members 22 and 23 are integrally rotated to pass through the guide grooves 15 and 15 of the upper and lower feed rollers 13 and 13. The wire rod x is being fed.

In addition, when removing the feed roller 13 described above, after loosening the fastening bolts 21 to 21 attracting the contact plate 24 to the convex base 17 side slightly, the contact plate 24 is removed by the handle 38. When it is rotated in the direction of arrow a, the fastening bolts 21 to 21 are transferred to the large holes 33a in the fastening bolt through holes 33 to 33 by the rotation of the plate 24 and the lid plate 25. The second ring member 22, the backing plate 24, and the cover plate 25 can be pulled out from the convex base 17 all at once, and the feed roller 13 and the first ring member 22 can be removed in the reverse order of the mounting.

By the way, the fastening of the feed roller 13 and the first and second ring members 22, 23 is adjusted by projecting from the second ring member 23 as shown in FIG. 4, as is clear from the above description. The fastening is performed by tightening the fastening bolts 21 to 21 in a state where the tips of the bolts 34 to 34 are in contact with the tip end surface of the convex base portion 17. Therefore, if the amount of protrusion of the adjusting bolts 34 to 34 from the second ring member 23 is adjusted and the distance between the first ring member 22 and the second ring member 23 in the above-mentioned fastening state is changed, the fastening force also changes. However, the surface pressure between the tapered surfaces 22a and 23a of the first and second ring members 22 and 23 and the V-shaped surface 13a of the feed roller 13 can be adjusted.

Therefore, when the tip of the wire rod x fed by the rotation of the feed roller 13 comes into contact with the stopper and the feed rod 13 continues to rotate even though the wire rod x has stopped, The above-mentioned surface is set so that the frictional force acting between the first and second ring members 22 and 23 and the feed roller 13 becomes smaller than the frictional force acting between the wire x and the feed roller 13 when the wire rod is stopped. If the pressure is adjusted, the first and second ring members 22 and 23 slip and rotate with respect to the feed roller 13 when the wire rod stops, and the feed roller 13 does not rotate. Therefore, the feed roller 13 does not slip and rotate with respect to the wire rod x, the wire rod x is not scratched, and the product quality is improved.

Even if the surface pressure is adjusted as described above, the first and second ring members 22 and 23 slip and rotate with respect to the feed roller 13, so that the feed roller 13 or the ring can be used for a long period of time. The V-shaped surface 13a of the members 22 and 23 and the taper surfaces 22a and 23a are worn, and the surface pressure or frictional force is changed to make the feeding of the wire rod x uncertain. Even in that case, since the adjusting bolts 34 to 34 can be adjusted by rotating operation so that the surface pressure is eliminated and the frictional force becomes an appropriate value, it is necessary to reset the setting so that the wire rod can be fed reliably against the above wear. be able to. This is also the case when the frictional force between the feed roller 13 and the wire rod x changes due to a change in the material of the wire rod x, and the feed roller 13 and the ring members 22 and 23 are affected by the change in the frictional force. The frictional force can be reliably fed, and when the wire rod is stopped by the stopper, the ring members 22 and 23 can be surely adjusted to slip and rotate with respect to the feed roller 13.

As shown in FIG. 4, a lock nut 40 is screwed from the contact plate 24 side to the adjustment bolt 34 thus adjusted to prevent loosening.

Further, although the above embodiment has been described by taking the apparatus for supplying the wire rod to the forging machine as an example, it goes without saying that the present invention can be applied to a wire rod processing apparatus other than the forging machine.

[0034]

[Effect of device]

 As is clear from the above description, according to the present invention, the feed roller is held by pressing it against the taper surface provided on the roller shaft by the axial tightening force. Since an adjusting means is provided to adjust the tightening force so that the roller shaft slips with respect to the feed roller when a forced stopping force acts on the wire during the supply of The roller shaft and the feed roller wear due to the slip rotation due to the use, and the frictional force acting between the roller shaft and the feed roller changes, or the wire material changes between the wire rod and the feed roller. When the frictional force of the roller changes, the frictional force between the feed roller shaft and the roller shaft can be accurately fed, and the roller shaft slides smoothly against the feed roller when the wire rod is forcibly stopped. It can be adjusted to as to rotate size.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a press forming machine equipped with a wire rod supply device according to the present invention.

FIG. 2 is a front view of a feed roller in the wire rod supply device.

FIG. 3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG.

5 is a cross-sectional view of the fastening bolt portion in FIG.

6 is a front view of the tip of the roller shaft in FIG.

FIG. 7 is an explanatory diagram of an attaching / detaching operation of a feed roller.

[Explanation of symbols]

 10 Wire Material Supply Device 13 Feed Roller 14 Roller Shaft 21 Fastening Bolt 22 First Ring Member 23 Second Ring Member 22a, 23a Tapered Surface 34 Adjustment Bolt x Wire Material

Claims (1)

[Scope of utility model registration request] 1. A device for sandwiching a wire rod by at least a pair of feed rollers supported by roller shafts, and supplying the wire rod to a predetermined wire rod processing position by the rotation of the feed rollers. A taper surface is formed in a fitting portion between the feed roller and the feed roller, and a holding means for holding the feed roller fitted to the roller shaft by pressing it against the taper surface with an axial tightening force; When a forcible stopping force acts on the wire rod during the supply of the wire rod, the above tightening force is applied so that the roller shaft slips and rotates with respect to the feed roller without causing a slip between the wire rod and the feed roller. A wire rod supply device comprising: an adjusting unit for adjusting.