JPH0679744B2 - Untwisting device for coil forming wire in coiling device with non-circular cross-section wire - Google Patents

Description

TECHNICAL FIELD The present invention relates to a twist straightening device for a coil forming wire in a coiling device having a non-circular cross-section wire.

[Prior Art] A conventional technology is described in JP-A-60-238054. That is, the twist correcting device for the coil forming wire in the coiling device for non-circular cross-section wire of this publication has one plane A
Has a final guide c having a through hole through which a work line b sandwiched by at least one pair of feed rollers a2-a2 and fed out can pass, and the guide c has a right angle with the plane A at its mouth. Has a mandrel d in the direction of penetrating the same, and one or more coiling pins e1 and e2 arranged in parallel with the plane A around the mandrel d, a cutting device f, and penetrating the plane A. In a coiling device having a pitch tool h capable of reciprocally moving a pitch applying surface in a direction,
A non-circular cross-section line is used as the work line b, and the cross-section of the through hole 1 of the guide c is a non-circular cross-section corresponding to the cross-sectional shape of the non-circular cross-section line. In the plane c where the line to be processed b passes at a right angle, the pitch tool h rotates in one direction according to the gradual increase in the moving amount in the positive direction, and when the pitch tool h is stationary, the pitch tool h is stationary and the pitch tool h It is provided with means capable of rotating in the opposite direction in accordance with the gradual decrease in the amount of movement in the opposite direction.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technique, it is not sufficient to correct the twist of the coil forming wire in the coiling of the non-circular cross-section wire.

That is, a coil spring B having a sectional shape as shown in FIG.
Prior art devices for forming
In FIG. 1), the cross section of the sandwiched state between the wire to be processed and the guide groove of the feed roller must be sandwiched by the major-diameter surface of the non-circular cross section, as shown in FIG. The contact area between the groove and the feed guide and the work line is small.
Therefore, there is a problem that the work line is inclined due to variations in the cross-sectional shape of the work line and causes the work line to be twisted, or the guide line is similarly twisted. Further, the feed of the work wire is defective, and the frictional force generated between the guide groove of the feed roller and the feed guide becomes large, resulting in shortening the life of the feed roller and the feed guide.

Therefore, the present invention is to provide a twist correcting device for a coil forming wire in a coiling device having a non-circular cross-section wire, which solves such inconvenience.

[Means for Solving the Problems] The present invention for solving the above-mentioned problems has a final hole having a through hole through which a wire to be processed that is sandwiched by at least one pair of feed rollers and sent out is present. A guide, a mandrel is provided in a direction of penetrating the guide parallel to the plane, and one or more coil pins arranged perpendicular to the plane around the mandrel, and a cutting device. A twist correction device for a coil forming wire in a coiling device having a non-circular cross-section wire having a pitch tool,
A non-circular cross-section line is used as the line to be processed, the line is clamped by the surface of the cross-section of the line to be processed in the minor axis direction, and the line is fed by the feed roller. The box body having the feed roller and the guide is a non-circular shape corresponding to the cross-sectional shape of the wire, and the feed roller and the guide are integrally rotatable with respect to the plane. It is provided so as to be rotatable with respect to the base via a gear mechanism of.

[Operation] An operation based on the above configuration will be described. The feed roller clamps a work line having a non-circular cross section on the surface in the minor axis direction of the cross section and is supplied to a coiling device composed of a coiling pin, a pitch tool, etc. through a guide. By rotating the provided box body with respect to the base through a gear mechanism including a worm and a worm wheel, the wire to be processed can be supplied to the coiling device in a declined state to manufacture a coil without twist.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a side view showing the entire apparatus. A plurality of pairs of feed rollers a1, a2, a3 installed on one plane A for sending a processed wire (coil forming wire) b having a non-circular cross section to manufacture a coil spring (also referred to as spring) B are timings. The rotation speed is transmitted through the pulley 3 and the bevel gears 4, 4, 4 and is rotated in the direction in which the line to be processed b is sent out by the rotation of the NC-controlled speed reducer. This feed roller a
The work line b, which is sandwiched by 1, a2, a3 and is sent out, leaves the guide c having a non-circular through hole 1 corresponding to the cross-sectional shape of the work line b, and the plane A at the mouth of the guide c. And a plurality of coil pins (also referred to as coiling pins) e1 and e2 arranged perpendicular to the plane A around a mandrel d provided in a direction penetrating in parallel with
A coil B is formed in a direction parallel to the plane A, and when it reaches a predetermined length, the cutting blade g of the cutting device f advances to shear the work line b to make one coil B. The coil B thus formed has a coil shape and the wires are in close contact with each other. Therefore, when the coil B is used as a tension coil spring, it can be used as it is, but in order to be used as a compression coil spring, , There must be a gap as a shrinkage allowance so that there is no adhesion between the coil pitches. The pitch tool h shown in FIG. 1 plays the role, the tip of the pitch tool h is above the plane A, and the pitch tool h rises above the plane A in the vertical direction. The coil forming element wire is gradually bent in the axial direction of the coil, and the pitch of the coil spring is increased, so that a gap can be provided. The coiling pins e1 and e2 are adjustable in and out in the direction of the arrow j so that the coil diameter can be adjusted. Although the coiling pins e1 and e2 are not shown in the drawing, they are moved by a cam. It is related to the rotation of the feed rollers a1 and a2,
By changing the coil diameter by feeding the wire to be processed b,
It is also possible to obtain barrel-shaped and drum-shaped coil springs. Further, 1 is a handle for rotating a worm 28 described later, and 2 is a lock lever.

Next, FIG. 2 is a plan view showing the feed rollers a1, a2, a3,
The feed roller a1 is rollers a11 and a12, and the feed roller a2 is a roller
a21 and a22, the feed roller a3 is composed of rollers a31 and a32,
The work line b is sandwiched and guided to the guide c through the feed guide i of the work line b. Further, FIG. 3 shows a sectional view of the feed roller a1 (AA section in FIG. 2). The feed roller a11 has a needle bearing 6 inserted therein and is directly connected and fixed to a shaft 7 which rotates via a bevel gear 4. The other feed roller a12 is attached by inserting a needle bearing 9 into a shaft 8 whose end is fixed by a fixing pin (not shown), and the shaft 8 is rotated by rotation of the shaft 7 via gears 10 and 11. To do. The clamping force on the work line b clamped by the feed rollers a11 and a12 is a hydraulic cylinder provided under the needle bearing 9 of the feed roller a12 and provided with a pressure reducing valve.
It is obtained by pressing the feed roller a12 toward the feed roller a11 by 13. This pressure is adjusted by the pressure reducing valve so that the pressure is moderate so as not to deform the material. Coil spring 16 sandwiched between bearing cases 15 and 15
When the material is replaced, when the hydraulic cylinder 13 is depressurized, the feed roller a12 is urged in the direction opposite to the clamping pressure on the feed roller a11 to increase the gap between the feed rollers a11 and a12 so that the gap easily passes through this gap. To

Note that FIG. 4 shows a detailed view of a cross section of the work line b clamped by the feed rollers a11 and a12 in a clamped state. The cross section of the wire to be processed b is non-circular, and the feed rollers a11 and a12 are sandwiched by the surfaces in the minor axis direction, and the grooves of the feed rollers a11 and a12 are formed so that they can be sandwiched in this way. The contact area of the work line b is increased. Still other feed rollers
The same applies to a2 and a3.

Next, a structure in which the feed rollers a1, a2, a3 and the guide c integrally rotate with respect to the plane A will be described with reference to FIGS. 5, 6, and 7. The plane A shown in FIGS. 8 and 9 is a translation of the plane A shown in FIG. 5 is a partial sectional view corresponding to FIG. 1, FIG. 6 is a sectional view taken along the line CC of FIG. 5, and FIG. 7 is a side view taken along the line DD of FIG. In FIG. 5, there is provided a box body 20 in which the feed rollers a1, a2, a3 and a motor 2 with a reduction gear for rotating these feed rollers a1, a2, a3 (not shown), a timing pulley 3, a bevel gear 4 and the like are integrally formed inside. Has been formed. The box body 20 is supported by the following structure. Ie, base 25
As shown in FIG. 6, a worm is provided in the housing 24 welded to the box-shaped bracket 26 fixed to the box 27 by bolts 27, 27.
The worm 28 is arranged via a pair of thrust bearings 40 arranged before and after supporting the 28. On the other hand, the worm wheel 29 formed on the worm 28 is fixed to the box body 20 with bolts 30 and protrudes into the housing 24 through an arcuate hole 31 provided in the bracket 26. Therefore, the box 20 is supported by the worm 28, and the box 20 is rotated by the action of the worm wheel 29.
The other support of the box body 20 is bolts 33, 33 to the base 25.
As shown in FIG. 7, an arcuate hole 35 having the same shape as the outer peripheral edge of the worm wheel 29 is penetrated through the bracket 32 fixed by the. The shaft 39 of the lock lever 38 is inserted into the hole 35. By screwing into the screw hole 36 formed in the box body
20 is supported by the shaft 39 of the lock lever 38. A lock lever 2 is provided below the worm 28 in order to fix and hold the rotating state of the box body 20, and an air cylinder 45 holds the rotating state of the box body 20 in a fixed manner.
The air cylinder 45 is moved by an NC controller (not shown) according to the twist of the wire to be processed, or the worm wheel 29
By rotating the box, the box body 20
Can be rotated.

The operation based on the above configuration will be described. Work line b
Is fed to the guide c via the rotating feed rollers a1, a2, a3. The clamping force of the work line b of the feed rollers a1, a2, a3 is adjusted by the hydraulic cylinder 13. Work line b with guide c
8 will be described with reference to FIG.
The front view of the guide c is shown in the arrow E view, and the through hole 1 penetrating the guide c is fitted with the wire to be processed b and the plane A is shown.
It is a figure in which the guide c is not declinated with respect to. On the other hand, FIG. 9 shows a state where the guide c is deviated from the plane A by θ °, and the work line b is also deviated by θ °.
That is, the wire to be processed b is supplied to the mandrel d in a state of being deviated by θ ° via the feed rollers a1, a2, and a3, and the coiling pin e
A coil B (Fig. 10) is manufactured by bending it to a predetermined curvature with 1 and e2. The moving amount according to the curvature of the coiling pins e1, e2, the feeding speed of the feed rollers a1, a2, a3, and the moving amount of the pitch tool h are controlled and synchronized by an NC controller (not shown).

Next, a method of integrally combining the feed rollers a1, a2, a3 and the guide c in this way to deviate the angle of θ ° will be described. First,
Unlock the lock lever 2 and the lock lever 38,
Next, reduce the hydraulic pressure supplied to the air cylinder 45 to
Make the rod in the retractable state.

Then, next, the handle 1 of the worm 28 is rotated.
The rotation of the handle 1 also rotates the worm 28, and the worm wheel 29 meshing with the worm 28 rotates to rotate the box body 20. Since the feed rollers a1, a2, a3 and the guide c are integrally attached to the upper end of the box body 20, the guide c rotates by the same rotation amount as the rotation amount of the box body 20, and the guide c has an eccentric angle θ. It becomes °. Predetermined deviation angle θ
After the guide c is set to °, the air cylinder 45 is pressurized to maintain the deviation angle θ ° of the box body 20, and the lock lever 2 and the lock lever 38 are further locked to open the box body 20. Hold firmly and fix. In this way, the work line b is fed by the feed rollers a1, a2, a3 and the guide c.
Can be sent to the coiling device in a deviated state via the.

[Effects of the Invention] As described in detail above, the present invention has a feed roller that clamps and feeds a wire to be processed having a non-circular cross section with a surface in the minor axis direction of the cross section, and a through hole through which the wire to be processed passes. The box body including the guide is configured to be rotated with respect to the base via a gear mechanism including a worm and a worm wheel.

Therefore, it is possible to prevent the twisting caused by the variation in the cross-sectional shape of the work line or the twisting of the work line caused by the deviation of the guide alone, and it is possible to extend the life of the feed roller. Then, it is possible to obtain a coil spring in which the center axis of the line to be processed is always orthogonal to the center line of the coil.

[Brief description of drawings]

1 is an overall side view of this embodiment, FIG. 2 is a plan view of a feed roller, FIG. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a work line clamped by the feed roller. Sectional view of the sandwiched state of
5 to 7 are views for explaining the structure in which the feed roller and the guide rotate integrally, FIG. 5 is a partial sectional view corresponding to FIG. 1, and FIG. CC sectional view of the figure, FIG. 7 is a DD side view of FIG. 5, FIG. 8 is a front view of the guide in the EE arrow view of FIG. 5, FIG. 9 is a front view of the guide in a declined state, FIG. 10 is a view of a coil spring made in the conventional example and the present embodiment, and FIG. 11 is a cross-sectional view of a feed roller holding a work line in a conventional device. A …… One plane a1, a2, a3 …… Feed roller b …… Work line c …… Guide d …… Mandrel e1, e2 …… Coil pin f …… Cutting machine h …… Pitch tool l …… Through hole 28 …… Warm 29 …… Worm wheel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiji Inagawa, Aichi Prefecture, Togo-machi, Togo-machi, Haruki-ji, Ichiike No. 1 Togo Works Co., Ltd. (72) Inventor Tsuruta Toshiyuki, Aichi-gun, Togo-machi, Haruki, Yakuike In Togo Seisakusho Co., Ltd. (56) Reference JP-A-60-238054 (JP, A) Actual Kaihei 2-48230 (JP, U) JP 61-54496 (JP, B2)

Claims (1)

[Claims] 1. A final guide having a through hole, which lies in one plane and through which a work line clamped by at least one pair of feed rollers and sent out can pass, and the guide is parallel to the plane. Forming coil in a coiling device having a non-circular cross-section line having a mandrel in a penetrating direction and having one or more coil pins arranged around the mandrel and perpendicular to the plane, a cutting device, and a pitch tool In the twist correction device for strands, a non-circular cross-section wire is used as the wire to be processed, and the wire is sandwiched between the surfaces in the minor axis direction of the cross-section of the wire to be sent out by the feed roller, and the guide is transparent. The cross section of the hole is non-circular corresponding to the cross-sectional shape of the non-circular cross-section line, and further, the feed roller and the guide are integrally rotatable with respect to the plane.
A coil forming wire in a coiling device having a non-circular cross section, wherein a box body including the feed roller and a guide is rotatably provided with respect to a base through a gear mechanism including a worm and a worm wheel. Straightening device.