JP2003088931A - Coil spring manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that the configuration of a tool operation device and a control means thereof is complicated and the manufacturing cost is high, remodeling of a conventional coil spring manufacturing machine is very difficult, and errors are large in the butting locus corresponding to the increase/decrease of the coil diameter in the tool operation device which can easily perform the setup of a forming tool which selectively winds a right-wind or left-wind coil. SOLUTION: A lower side tool operating device 10 performs the transfer to and positioning at the position of a right-wind movement center 15R around the axis 24 of oscillation and the position of a left-wind movement center 15L, and an upper side tool operating device 40 performs the transfer to and positioning at the position of the right-wind movement center 45R and the position of the left-wind movement center 45L around the axis 54 of oscillation. The rearrangement of the lower forming tool T1 and the upper forming tool T2 for selectively winding the right-wind or left-wind coil can be easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil spring manufacturing machine for selectively winding a right-handed coil or a left-handed coil by sequentially abutting a wire rod fed from a quill with two forming tools, and more particularly, to a coil spring making machine. , A coil spring manufacturing machine provided with means for changing the positions of the lower forming tool that abuts on the lower side of the coil and the upper forming tool that abuts on the upper side to the respective right-handed or left-handed processing positions. is there.

[0002]

2. Description of the Related Art A coil spring manufacturing machine sets a position at which two forming tools collide with a coil as a right winding processing position or a left winding processing position, depending on whether the coil spring to be wound is right winding or left winding. The position needs to be changed. Since the mass of each tool operating device that operates the two forming tools is 10 to 50 kg, the work of detaching and changing the position of each tool operating device to the right winding processing position or the left winding processing position is a heavy labor. Moreover, careful attention is required for safe work, and it took a long time to change the setup. For the purpose of solving such a problem, for example, an invention (hereinafter referred to as a prior art) relating to an operating device for a molding tool disclosed in Japanese Patent Laid-Open No. 2000-263172 is known.

In this prior art, as shown in FIG. 11, the lower tool slide mechanism 104 and the upper tool slide mechanism 205, which are provided at symmetrical positions with respect to the quill axis, rotate the disc cams 131 and 231. With this configuration, the forming tools T11, T12 can be respectively swung with the support shafts 110, 210 as respective swing centers, and the forming tools T11, T12 can be respectively moved back and forth by each rotation of the disc cams 122, 222. Is. The tool slide mechanisms 104 and 205 do not need to be detached and repositioned when the setup is changed from a right-handed coil to a left-handed coil or a left-handed coil to a right-handed coil.

That is, when processing the right-handed coil shown in FIG. 11, the disc cam 13 of the tool slide mechanism 104 is processed.
The pivot point of the forming tool T11 that abuts on the lower side of the coil with the support shaft 110 as the swing center by the rotation of 1 is approximated to the linear quill side abutment trajectory corresponding to the increase or decrease of the coil diameter. The abutment point of the forming tool T12, which is caused to abut on the upper side of the coil by swinging along the arc locus and by the rotation of the disc cam 222 of the tool slide mechanism 205, is a linear distant position corresponding to the increase or decrease of the coil diameter. It is moved back and forth along a forward / backward movement center line parallel to the side abutment trajectory (corresponding to the core metal side abutment trajectory of the present invention).

When processing the left-handed coil, the abutment point of the forming tool T12 is abutted on the upper side of the coil with the support shaft 210 as the swing center by the rotation of the disk cam 231 of the tool slide mechanism 205. Tool T11 that oscillates along an arc locus approximate to a straight quill side abutment locus and abuts on the lower side of the coil by rotating the disc cam 122 of the tool slide mechanism 104. The abutting point of is moved forward and backward along the forward / backward movement center line parallel to the linear far side abutment trajectory.

[0006]

The feature of the above-mentioned prior art is that the tool slide mechanisms 104, 2 are used when the setup is changed from a right-handed coil to a left-handed coil or a left-handed coil to a right-handed coil.
That is, it is not necessary to attach and detach 05 to change the position.
However, in order to make the abutment points of the forming tools T11 and T12 of the present invention with the coils correspond to the quill side abutment trajectory and the distant side abutment trajectory corresponding to the increase and decrease of the coil diameter, a right-handed coil and a left-handed coil are used. Since the quill side abutment trajectory and the far side abutment trajectory are located upside down, the tool slide mechanisms 104 and 205 have their respective forming tools T11 and T.
A tool operating mechanism of two configurations for swinging 12 and moving straight,
Two control means for controlling these are required respectively.

Therefore, the invention for facilitating the setup change of the prior art is the tool slide mechanism 104, 205.
Each of the tool operating mechanisms and the control means for controlling them are indispensable, which is complicated and the manufacturing cost is high. Further, the conventional coil spring manufacturing machine operating most in the industrial field is not provided with a tool swinging operation mechanism for swinging each of the two forming tools and its control means. As described above, there is a problem that it is extremely difficult to modify the conventional coil spring manufacturing machine.

Further, according to this prior art, in the forming tool that abuts the coil on the quill side, the swing locus of the abutting point corresponding to the increase or decrease of the coil diameter is a theoretical straight quill side abutment locus. On the other hand, since it is an approximate arc locus, there is a large error in the theoretical abutting position, especially when manufacturing different types of coil springs including a coil spring with a large difference between the minimum coil diameter and the maximum coil diameter. was there.

The present invention has been made in view of the above problems, and an object thereof is to manufacture a coil spring in which a right-handed coil or a left-handed coil is selectively wound by two forming tools. In a tool operating device for facilitating machine setup change, the problem that the structure of each tool operating device of two forming tools and its control means is complicated and the manufacturing cost is high, a conventional coil spring manufacturing machine is modified. It is extremely difficult to do so, and the trajectory of the abutment point with the coil of one forming tool that swings along the arc trajectory has a large error with respect to the linear abutment trajectory corresponding to the increase or decrease of the coil diameter. And so on.

[0010]

In order to solve the above-mentioned problems, the invention of claim 1 uses a wire rod fed from a quill.
A coil spring manufacturing machine that sequentially winds right-handed or left-handed coils by sequentially abutting individual forming tools, and increases or decreases the coil diameter of the forming groove of the lower forming tool that abuts on the lower side of the coil. And a lower slide that moves back and forth along an abutment trajectory corresponding to, and this lower slide can be guided along a movement center line parallel to the abutment trajectory, and the lower forming tool abuts on the quill side. A lower slide base that is selectively positioned and fastened to the substrate at two positions, a right-handed machining position and a left-handed machining position that abuts on the core side, and the lower slide base is rocked on the substrate. The lower tool actuating device provided with a swinging shaft that is displaceably supported between the right winding processing position and the left winding processing position, and the forming groove of the upper forming tool that abuts on the upper side of the coil for increasing or decreasing the coil diameter. An upper slide that moves back and forth along the corresponding collision trajectory This upper slide can be guided along a movement center line parallel to the abutment trajectory, and there are two positions, a right-handed machining position where the upper forming tool abuts on the core metal side and a left-handed machining position where the upper forming tool abuts on the quill side. An upper slide base that is selectively positioned and fastened to the substrate, and a swing shaft that swings the upper slide base on the substrate so as to be displaceable between the right winding processing position and the left winding processing position. And an upper tool operating device provided with.

According to the first aspect of the present invention, each tool operating device of the two forming tools can be fastened to the substrate at two positions, that is, the right winding processing position and the left winding processing position of each forming tool. In addition, each of the tool actuating devices is swung to the right-handed machining position and the left-handed machining position of the forming tool so as to be able to be displaced, and either the right-handed machining position or the left-handed machining position. Since the positioning is performed on one side, the structure of each tool operating device and its control means can be simple and inexpensive.

Then, in order to change the setting between the right-handed machining position and the left-handed machining position, the fastening of each tool operating device is released from the substrate to be displaced by swinging, and either the right-handed machining position or the left-handed machining position is moved. This can be easily done by positioning at. Further, the abutting points of the lower forming tool and the coils of the upper forming tool respectively move forward and backward along the linear abutment loci corresponding to the increase and decrease of the coil diameter at the respective right winding processing positions and left winding processing positions. So it matches the theoretical impingement trajectory.

Further, in addition to one rocking shaft for shifting each tool operating device by rocking with respect to the conventional coil spring manufacturing machine, two each corresponding to each machining position of each tool operating device. By adding a right-handed reference hole and a left-handed reference hole, and a pin hole and a positioning pin to each tool actuating device, it is possible to modify the coil spring manufacturing machine with easy setup change.

Next, the swing shaft of the lower tool actuating device according to the second aspect of the present invention is such that the right winding movement center line at the right winding processing position and the left winding movement center line at the left winding processing position of the lower slide are formed. With the intersecting position that converges as the axis,
Further, the swing shaft of the upper tool actuating device has an intersecting position where a right-handed movement center line at the right-handed machining position of the upper slide and a left-handed movement center line at the left-handed machining position converge as an axial center. It is a thing.

According to the second aspect of the present invention, the swing shaft of the lower tool actuating device has an axial position at the intersection of the right-hand winding center line and the left-hand moving center line of the lower slide. Since the swing axis of the tool actuator is set so that the center of intersection of the right-hand and left-hand movement centerlines of the upper slide is the axis, the lower slide for attaching the tool holder of the lower forming tool is attached. The seating surfaces of the right-handed processing position and the left-handed processing position can be used in common, and the seating area is made narrow, and the right-handed processing position and the left-handed processing position of the upper slide for mounting the tool holder of the upper forming tool Most of the surfaces can be shared and the seating area can be made small.

The reason for this is that the intersection of the right-handed movement center line and the left-handed movement center line of the lower slide (the axis of the swing shaft).
Is located substantially in the center of the seating surface of the tool holder at each machining position, and the crossing position between the right-hand and left-hand movement centerlines of the upper slide is the seating surface of the tool holder at each machining position. This is because it is located in the approximate center.
Since the seating area of each slide can be narrowed, the weight mass of each slide can be reduced and the inertial mass can be reduced.

Next, in the right-hand winding reference hole for positioning the lower tool actuating device according to the invention of claim 3 at the right-handing processing position, the right-hand movement center line of the lower slide is above the quill axis. The left-hand winding reference hole that is positioned at a position that can be positioned at a right-handed processing position that is tilted by 22.5 °, and that is positioned at the left-handed processing position is a left-handed reference hole in which the left-hand moving center line is tilted 67.5 ° downward with respect to the quill axis. The right-handed reference hole for drilling the board at a position positionable to the processing position and for positioning the upper tool actuating device at the right-handed processing position has a right-hand movement center line of the upper slide with respect to the quill axis. The left-hand winding reference hole is positioned at a position where it can be positioned at the right-handing processing position tilted upward by 67.5 ° and at the left-handing processing position, and the left-hand movement center line is the quill axis. It is obtained so as to perforate the substrate respectively positionable located counterclockwise machining position 22.5 ° inclined downwardly against.

According to the third aspect of the present invention, the right-handed reference hole of the lower tool actuating device can be positioned at the right-handed machining position in which the right-hand movement center line is inclined 22.5 ° upward with respect to the quill axis. The left-hand winding reference hole is drilled at a position where the left-hand winding center line can be positioned at the left-handing processing position where the left-hand moving center line is inclined downward by 67.5 °, and the right-hand winding reference hole of the upper tool operating device is the right-hand moving center The left-hand winding reference hole has a left-hand movement center line that moves downwards at a position where the wire can be positioned in a right-hand winding processing position that is inclined 67.5 ° upward with respect to the quill axis.
Since the holes are drilled at positions that can be positioned in the left-handed machining position that is inclined by 2.5 °, the normal line at the abutment point between the forming groove of each forming tool and the coil corresponds to the center of the coil as the coil diameter increases or decreases. You can always be mindful of.

That is, in the right-handed machining position, the moving center lines of the lower tool operating device and the upper tool operating device are inclined 22.5 ° upward and 67.5 ° upward with respect to the quill axis, respectively. , The lower groove forming tool and the upper groove forming tool are also inclined upward by 22.5 ° or 67.5 °, respectively. If the origin of this forming groove movement locus is the intersection of the perpendicular line passing through the center of the coil and the quill axis, the abutting point between the forming groove of each forming tool and the coil is the horizontal center of the coil parallel to the quill axis toward the coil center. The former makes an angle of 45 ° downwards and the latter an angle of 45 ° upwards with respect to the line.

Therefore, when the coil diameter is increased / decreased, the lower forming tool is tilted upward by 22.5 ° with respect to the quill axis, and the upper forming tool is moved upward 6 °.
Even if the coil diameter increases or decreases, the abutment point between the forming groove of each forming tool and the coil is the horizontal center of the coil toward the coil center by making the abutment on the core metal side abutment locus inclined by 7.5 °. Since 45 ° is maintained with respect to each line, the normal line at the abutment point between the forming groove of each forming tool and the coil can always be centered on the center of the coil. The same applies to the left winding processing position.

Next, the lower slide actuating mechanism for moving the lower slide of the lower tool actuating device according to the invention of claim 4 forwards and backwards is provided on the lower slide base behind the retracted end of the lower slide. A crank disk rotatably pivotally mounted, a crank pin erected at an eccentric position with respect to the center of rotation of the crank disk, and the crank disk pivotally connected to the crank pin and the lower slide. A connecting rod for converting the rotational movement of the above into a linear movement of the lower slide,
An upper slide actuating mechanism provided on the lower slide base for rotating the crank disk, and an upper slide actuating mechanism for moving the upper slide of the upper tool actuating device forward and backward, more than a retracted end of the upper slide. A crank disc rotatably pivotably mounted on the upper slide base at the rear, a crank pin erected at an eccentric position with respect to the center of rotation of the crank disc, and a pivot pin on the crank pin and the upper slide. A connecting rod that is connected to convert the rotational movement of the crank disk into a linear movement of the upper slide, and a drive unit that is provided on the upper slide base and that rotates the crank disk are provided.

According to the invention of claim 4, each slide actuating mechanism for advancing and retracting each slide of each tool actuating device comprises a slide guide capable of guiding each slide, a rotatable crank disk, Since the crank pin erected on the crank disk, the connecting rod pivotally connected to the crank pin and the lower slide, and the drive means for rotating the crank disk are respectively provided, the rotation of each drive means is prevented. The amount of angle can be reliably converted as the amount of advance / retreat movement of each slide by the crank movement. Therefore, unlike the cam mechanism in which the cam follower is circumscribed on the disk-shaped cam, jumping does not occur when the drive means rotates at high speed, and it is possible to easily cope with high-speed machining of the coil spring manufacturing machine.

Then, on the lower slide of the lower tool actuating device according to a fifth aspect of the present invention, a tool holder to which the lower molding tool is attachable / detachable is attached to the lower molding tool in the right winding processing position and the left winding operation. Mounting holes for selectively positioning and mounting are provided at two positions capable of abutting each of the abutting loci at the processing position, and the upper forming tool can be attached to and detached from the upper slide of the upper tool operating device. The tool holder is configured such that the upper forming tool is provided with mounting holes capable of selectively positioning and attaching at two positions capable of abutting with each abutting trajectory at the right-handed machining position and the left-handed machining position. is there.

According to the invention of claim 5, the lower slide is provided with the tool holders at two positions where the lower forming tool can abut each abutment trajectory at the right-handed machining position and the left-handed machining position. Provided with mounting holes that can be selectively positioned and removed,
Further, the upper slide is provided with mounting holes for selectively positioning and detaching the tool holder at two positions where the upper forming tool can abut each abutment trajectory in the right-handed machining position and the left-handed machining position. Therefore, when each tool operating device is set up for the right-handed machining position or the left-handed machining position, there is reproducibility of positioning each forming tool on its abutment trajectory and the setup time can be shortened.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a coil spring manufacturing machine of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view of the entire tool operating device in the right winding processing position, FIG. 2 is a front view of the entire tool operating device in the left winding processing position, and FIG. 3 is an enlarged view of the lower tool operating device shown in FIG. 5 and 6 are sectional views taken along the line AA of FIG.
Is a front view showing the positional relationship between each reference hole and each fastening bolt hole of each tool operating device, FIG. 6 is a layout view of each forming tool at the right-handed machining position, and FIG. 7 shows a setup changing procedure of the lower forming tool. FIG. 9 is a simplified diagram in the right-handed machining position, FIG. 8 is a simplified diagram in which the lower tool operating device is changed to the left-handed machining position, and FIG.
10 is a simplified diagram in which the lower forming tool is repositioned to the left-handed machining position, and FIG. 10 is a simplified diagram in which the lower forming tool is repositioned to the left-handed machining position.

As shown in FIGS. 1 and 2, the coil spring manufacturing machine includes a pair of feed rollers 2 and 2 for feeding a wire W to an upright substrate 1, and a quill 3 for guiding the wire W into a forming space. A lower tool operating device 10 for abutting the lower forming tool T1 on the lower side of the coil, an upper tool operating device 40 for abutting the upper forming tool T2 on the upper side of the coil, and a predetermined interval for the wound coil. A pitch tool Tp for imparting a pitch,
A cutting tool Tc for cutting the wound coil spring in cooperation with the core metal 4 is provided.

The pair of feed rollers 2 and 2 are rotatably pressed against each other by pressing means (not shown) and send out the wire W clamped on the outer circumference thereof by the rotation of driving means (not shown). The quill 3 is formed so that the wire W can be inserted therethrough, and guides the wire W delivered from the pair of feed rollers 2 and 2 into the coil forming space. The core metal 4 has a cutting edge formed on the vertical center line of the coil to be wound, and is inscribed in the coil on the far side from the quill. The tip end of the pitch tool Tp is formed as an inclined surface, and is advanced by advancing / retreating operation means (not shown) to bias the wound coil in the coil forming direction to impart a pitch of a predetermined interval. The cutting tool Tc has a cutting edge formed at a tip corner portion thereof, and is advanced by advancing / retreating operation means (not shown) to cut the coil spring in cooperation with the core metal 4.

Next, in the lower tool actuating device 10 for attaching the lower forming tool T1, as shown in FIGS. 3 and 4, the lower slide base 12 is provided on the front surface of the substrate 1 and the reamer bolt 13A also serving as a positioning pin. And fastening bolts 13B, 13C, 13
It is fastened by D and. This lower slide 12
Can be fastened to two positions of a right-handed and left-handed processed position of the substrate 1 described later, and the outer diameter of the body portion of the reamer bolt 13A is the same as the reamer bolt hole of the lower slide base 12,
It is formed so that it can be positioned by engaging with a right-handed reference hole and a left-handed reference hole of the substrate 1 which will be described later.

Further, in the lower slide base 12, the intermediate body portion 24a of the swing shaft 24 integrally fastened to the lower slide base 12 is engaged with the swing hole 1a of the substrate 1 on the left side in the figure. do it,
The swing shaft 24 can be swung between a right-handed machining position and a left-handed machining position, and the right-handed machining position or the left-handed machining position is formed by the swing shaft 24 and the right-handing reference hole or the left-handing reference hole. Be positioned at. The swing shaft 24 is
It is fastened to the substrate 1 with an intersecting position where a right-handed movement center line and a left-handed movement center line described later converge as an axis.
A pair of slide guide plates 14, 14 are fastened to the recess 12a formed in the lower slide base 12.

Guide grooves for guiding the lower slide 15 so that the lower slide 15 can move forward and backward are formed on the inner side surfaces of the slide guide plates 14, 14, respectively, and the lower slide 15 moves along the guide groove along the center line of movement. Move back and forth. The tip of the lower slide 15 has an upper surface 14 a of each slide guide plate 14.
The portion protruding from is widened, and the seating surface 15a on the upper surface thereof
Is formed so that the tool base plate 16 can be attached and detached at two positions, a right-handed processing position and a left-handed processing position, which will be described later.
The position of the tool base plate 16 can be adjusted by screwing an adjustment bolt 18 of a base 17 fastened to the lower slide 15.

A tool holder 21 is fastened to the tool base plate 16, and a tool insertion hole 21a through which the lower forming tool T1 can be inserted is bored in the longitudinal direction of the tool holder 21. A tool insertion hole 21a is provided near the tip in the longitudinal direction.
A cutting groove 21b that is orthogonal to is cut until it reaches the tool insertion hole 21a. A not-shown slit groove that passes through the center of the tool insertion hole 21a and is orthogonal to the slit groove 21b is formed on the tip side of the slit groove 21b. The insertion hole of the clamping bolt 23 and the female screw are formed so as to tighten the groove.
Then, the lower forming tool T1 is inserted into the tool insertion hole 21a of the tool holder 21, and after adjusting the amount of protrusion by the adjusting bolt 22, it is clamped by the clamping groove 23 of the tool holder 21 by the clamping bolt 23. The lower forming tool T1 is provided with the lower slide 15 and the lower slide operating mechanism 11 below.
Moved back and forth.

The lower slide actuating mechanism 11 has a rotatable crank disc 27, a crank pin 27a provided upright on the crank disc 27, and a rotational movement of the crank disc 27 to move the lower slide straight. Connecting rod 32 that transforms into movement
And a servomotor (driving means) 33 for rotating the crank disk 27. A sleeve 28 is rotatably attached to the lower slide base 12 rearward of the retracted end of the lower slide 15 via a bearing, and a crank disk 27 is integrally fastened to the sleeve 28. There is. The crank disk 27 is provided with a crank pin 27a at a position eccentric to the center of rotation thereof.

A yoke 29 is erected on the rear end of the lower slide 15. One end of the connecting rod 32 is connected to the yoke 29 by the pivot shaft 31 that is axially fixed to the yoke 29.
The other end of the connecting rod 32 is rotatably attached to the crank pin 2 protruding from the eccentric position of the crank disk 27.
It is rotatably attached to 7a. This crank mechanism converts the rotational movement of the crank disk 27 into the linear movement of the lower slide 15. A speed reducer 34 is attached to the output side of the servo motor 33 that drives the crank disk 27. The speed reducer 34 is coaxial with the crank disk 27 and is provided in the speed reducer engaging hole of the lower slide base 12. The attached output shaft is keyed to the sleeve 28.

In the lower tool actuating device 10 thus constructed, the reducer 34, the sleeve 28, the crank disk 27, the connecting rod 32, the pivot shaft 31 and the yoke 29 are rotated by the rotational movement of the servo motor 33. The lower forming tool T1 is moved forward and backward together with the lower slide 15 through the above.

Next, in the upper tool actuating device 40 for mounting the upper forming tool T2, as shown in FIGS. 1 and 2, the upper slide base 42 is fastened to the front surface of the substrate 1 and the reamer bolt 43A which also serves as a positioning pin. Bolts 43B, 43C, 43
It is fastened by D and. This upper slide base 42
Can be fastened at two positions of a right-handed processing position and a left-handed processing position, which will be described later, of the substrate 1, and the outer diameter of the body portion of the reamer bolt 43A is the same as the reamer bolt hole of the upper slide base 42.
It is formed so that it can be positioned by engaging with a right-handed reference hole and a left-handed reference hole of the substrate 1 which will be described later.

The upper tool actuating device 40 has the same structure as the lower tool actuating device 10 described above, and is different only in the mounting position. Therefore, regarding the configuration, the same components as those of the lower tool actuating device 10 have the same names, and the sign of the lower tool actuating device 10 plus 30 (the last one digit is common) is used for comparison. Therefore, only the list will be described below and detailed description will be omitted.

A list of them is shown in FIG.
Upper slide base 42, recess 42a, reamer bolt 43
A, tightening bolts 43B, 43C, 43D, slide guide plate 44, upper surface 44a, upper slide 45, seating surface 45
a, tool base plate 46, pedestal 47, adjustment bolt 48, tool holder 51, tool insertion hole 51a, notch 51b, adjustment bolt 52, clamping bolt 53, swing shaft 54, intermediate body portion 54
a, crank disk 57, crank pin 57a, yoke 5
9, pivot shaft 61, connecting rod 62, servo motor 63,
The speed reducer 64.

The upper tool actuating device 40 thus constructed moves the upper forming tool T2 forward and backward together with the upper slide 45 via the crank disk 57, the connecting rod 62, etc. by the rotational movement of the servomotor 63. .

Next, the lower tool operating device 10 and the upper tool operating device 40 are positioned at either the right winding processing position where the right winding coil spring is wound or the left winding processing position where the left winding coil spring is wound. Each swing axis, each reference hole,
Each fastening bolt hole will be described with reference to the symbolized FIG. In FIG. 5, Δ indicates the lower tool actuating device 10 and □ indicates the fastening bolt holes for fastening the upper tool actuating device 40 to the respective right-handed machining positions, and the ▲ indicates the lower tool actuating. Device 10, black squares indicate respective fastening bolt holes for fastening the upper tool actuating device 40 to each left-handed machining position.
Of these, each one hole having a double line outer frame indicates each reference hole for fastening each reamer bolt.

The lower tool actuating device 10 for winding the right-handed coil spring shown in FIG.
The abutting point of the lower forming tool T1 that abuts on the side) is in the right winding processing position where it can move back and forth along the quill side abutment locus 35R (see FIG. 6) corresponding to the increase or decrease in the coil diameter. The right winding movement center line 15R of the lower slide 15 that moves forward and backward together with the lower forming tool T1 is the quill side abutment trajectory 3
22.5 parallel to the 5R and upward with respect to the quill axis
It is set to °.

Further, in the upper tool actuating device 40, the abutment locus 65R (FIG. 6) in which the abutting point of the upper forming tool T2 abutting on the upper side of the coil (core 4 side) corresponds to the increase or decrease in the coil diameter. Although the right winding processing position is in a right-handed machining position in which the right-handed processing is possible along with the upper forming tool T2, the right-handed movement center line 45R of the upper slide 45 that moves forward and backward along the upper forming tool T2 is parallel to the core metal side abutment trajectory 65R. And it is set at 67.5 ° upward with respect to the quill axis.

Similarly, in the lower tool actuating device 10 for winding the left-handed coil spring shown in FIG. 2, the abutting point of the lower forming tool T1 which abuts on the lower side of the coil (core 4 side). It is in the left-hand winding processing position where it can move back and forth along a not-shown core metal side abutment trajectory corresponding to the increase or decrease of the coil diameter, but at this time, the left-hand slide center line 15L of the lower slide 15 which moves forward and backward together with the lower forming tool T1. Is set parallel to the abutment locus on the core metal side and at 67.5 ° downward with respect to the quill axis.

Further, the upper tool actuating device 40 advances and retreats along a quill side collision locus (not shown) in which the abutment point of the upper forming tool T2 abutting on the upper side of the coil (on the side of the quill 3) corresponds to the increase or decrease of the coil diameter. It is in a movable left-handed processing position,
At this time, the left-handed movement center line 45L of the upper slide 45 that moves forward and backward together with the upper forming tool T2 is parallel to the quill side abutment locus and is 22.5 ° downward with respect to the quill axis.
Is set to.

As shown in FIG. 5, the swing shaft 24 that shifts the lower tool actuating device 10 to the right winding processing position or the left winding processing position by swinging, as shown in FIG. As shown in FIG. 4, it is fastened to the back surface of the lower slide base 12 with the intersecting position where the left-handed movement centerline 15L and the left-handed movement center line 15L converge. This swing shaft 24
As shown in FIG. 4, the intermediate body portion 24a is engaged with the swing hole 1a of the substrate 1, so that the lower slide base 12 is
Is a reamer bolt 13A, fastening bolts 13B, 13C,
By removing 13D, it is possible to displace by swinging between the right winding processing position and the left winding processing position around the swing shaft 24.

Similarly, the swing shaft 54 that shifts the upper tool actuating device 40 to the right-handed machining position or the left-handed machining position by swinging is equipped with a right-hand movement center line 45 of the upper slide 45.
It is fastened to the back surface of the upper slide 45 with an intersecting position where R and the left-hand movement center line 45L converge as an axis.
Since the intermediate body portion 54a of the swing shaft 54 is engaged with the swing hole 1b of the substrate 1, the upper slide base 42 includes the reamer bolt 43A and the fastening bolts 43B, 43C, 43D.
By dismounting, it is possible to shift by swinging between the right winding processing position and the left winding processing position about the swing shaft 54.

In order to position the lower tool actuating device 10 at the right-handed machining position, the reamer bolt 13A for fastening the lower slide base 12 is engaged with the right-handed reference hole (reamer bolt hole) 13aR shown in FIG. Then, tighten the bolts 13B, 13C, 13D with the right-handed tightening bolt holes 13b.
Fasten to R, 13cR and 13dR respectively. To position at the left-handed machining position, the reamer bolt 13A for fastening the lower slide base 12 is engaged with the left-handed reference hole 13aL and fastened, and the fastening bolts 13B, 13C, 13D are left-handed fastening bolt hole 13bL, Tighten to 13cL and 13dL respectively.

Similarly, in order to position the upper tool actuating device 40 at the right-handed machining position, the reamer bolt 43A for fastening the upper slide base 42 is engaged with the right-handed reference hole 43aR and fastened, and the fastening bolt is tightened. 43B, 43C and 43D are respectively fastened to the right-handed fastening bolt holes 43bR, 43cR and 43dR. To position at the left winding processing position, the reamer bolt 43A for fastening the upper slide base 42 is engaged with the left winding reference hole 43aL and fastened, and the fastening bolt 43
B, 43C, 43D are left-handed tightening bolt holes 43bL, 4
Tighten to 3 cL and 43 dL respectively.

Next, regarding the setup change of each forming tool, based on an example of changing the position of the lower forming tool T1 of the lower tool operating device 10 shown in FIGS. 7 to 10 from the right-handed machining position to the left-handed machining position. explain. 7 to 10, the tool base plate 16 (46) and the tool holder 21
(51) is simplified and integrally expressed.

From the right winding processing position of the right winding movement center line 15R shown in FIG. 7, the lower slide base 12 is swung around the swing shaft 24 according to the above procedure, and the left winding movement center line 15L shown in FIG. Shift to the left-hand winding position and position and tighten. After that, the fastening bolts 19A, 1 of the tool base plate 16
9B is removed, and a positioning pin (not shown) embedded in the tool base plate 16 is removed from the tool positioning pin hole 20R formed in the lower slide 15 at the right-handed machining position to remove the lower molding tool T1 and the tool holder 21. At the same time, the tool base plate 16 is separated from the lower slide 15.

The separated tool base plate 16 is repositioned to the left-handed machining position shown in FIG. 9, and the positioning pin (not shown) of the tool base plate 16 is engaged with the tool positioning pin hole 20L of the lower slide 15. , Tightening bolt 19A,
19B to the fastening bolt holes 19aL, 1 of the lower slide 15
9bL and screw the lower forming tool T1 with the adjusting bolt 18 shown in FIG. 3 to the horizontal center line of the left-handed coil while adjusting the tool base plate 16 to the lower slide 15 while adjusting the position to 45 °. To wear.

Since the lower forming tool T1 in this state is not in a position where it can collide with the lower side of the left-handed coil, the servo motor 33 of the lower slide actuating mechanism 11 is rotated to move it to the position shown in FIG.
Adjust the position to 0, which allows collision. Then, when the lower forming tool T1 of the lower tool operating device 10 is set up from the left winding processing position to the right winding processing position, and when the upper forming tool T2 of the upper tool operating device 40 is set to the left winding processing position or the right winding processing position. Even in the case of the setup change, the setup can be easily changed in the same manner.

Subsequently, the coil winding action of the present example configured as described above will be described based on the example of the right-handed coil shown in FIG.

As shown in FIG. 1, the lower slide 15 moves forward and backward along the right winding center line 15R which is set at 22.5 ° upward with respect to the quill axis. The lower forming tool T1 that abuts at the position also moves back and forth along a quill side abutment locus 35R of 22.5 ° parallel to this. And, even if it moves between the abutting positions Pm and Pn due to the increase or decrease of the coil diameter, the axis of the lower forming tool T1 maintains an angle of 45 ° downward with respect to the horizontal center line of the right-handed coil. The lower forming tool T1 can always be centered on the center of the right-handed coil.

Further, since the upper slide 45 moves forward and backward along the right winding movement center line 45R set at 67.5 ° upward with respect to the quill axis as shown in FIG. The upper forming tool T2, which abuts at, also moves back and forth along the core metal side abutment locus 65R of 22.5 ° with respect to the vertical centerline of the right-handed coil parallel thereto. Then, even if the coil diameter is increased or decreased to move between the abutting positions Qm and Qn, the axis of the upper forming tool T2 maintains an angle of 45 ° upward with respect to the horizontal center line of the right-handed coil.
The upper forming tool T2 can always be centered on the center of the right-handed coil. Of course, the same applies to the left-handed coil.

The coil spring manufacturing machine according to the present invention is
The present invention is not limited to the embodiment described above, and various forms can be configured without departing from the gist of the present invention. For example, the swing of the slide base can be performed by fastening the swing shaft to the substrate and swinging the slide base in the engaging hole portion.

[0057]

Since the present invention is as described above, it has the following effects.

According to the first aspect of the present invention, each tool operating device of the two forming tools is rockable between the right-handed machining position and the left-handed machining position so as to allow the rearrangement. Since it is positioned at either one of the processing positions, the structure of each tool operating device and its control means can be simple and inexpensive, and the manufacturing cost can be reduced and the handling can be facilitated.

Further, since the lower forming tool and the upper forming tool respectively move forward and backward along the straight abutment trajectory corresponding to the increase and decrease of the coil diameter at the respective right winding processing positions and left winding processing positions, The coil can be wound in conformity with the theoretical abutment trajectory, and the quality of the coil spring can be improved. further,
In addition to one swing shaft for swinging each tool actuator with respect to the conventional coil spring manufacturing machine, two right-hand reference holes and two left-hand winding holes corresponding to each machining position of each tool actuator. By adding the reference hole, and one pin hole and one positioning pin to each tool operating device, it is possible to modify the coil spring manufacturing machine with easy setup change and save the facility cost.

According to the second aspect of the present invention, the rocking shaft of each tool operating device is mounted on the substrate with the crossing position of the right winding movement center line and the left winding movement center line of each slide as the axis. Since each is supported axially, the seating surfaces of the right-handed machining position and the left-handed machining position of each slide that mounts the tool holder of each forming tool can be used in common, and the seating area must be narrow. You can Therefore, since the seating area of each slide can be narrowed, the weight mass of each slide can be reduced and the inertial mass can be reduced, so that the speed of each slide can be increased.

According to the third aspect of the present invention, the right-handed reference hole of the lower tool actuating device is located at a position where the right-handed movement center line is tilted upward by 22.5 ° with respect to the quill axis, and is left-handed. Are drilled at positions where the left-handed winding center line is inclined downward by 67.5 °, and the right-handed reference hole of the upper tool actuating device has a right-handed movement center line located upward 66.7 ° with respect to the quill axis.
The left-hand winding reference hole is drilled at a position inclined by 5 ° at a position where the left-hand movement center line is inclined downward by 22.5 °, so that each forming tool is placed at the center of the coil according to the increase or decrease of the coil diameter. You can always be mindful.

That is, in the right-handed machining position, the lower forming tool and the upper forming tool are positioned at an angle of 45 ° with respect to the horizontal center line of the coil parallel to the quill axis, and the lower forming tool is aligned with the quill axis. On the other hand, on the quill side abutment locus inclined upward by 22.5 °, the upper forming tool is moved upward by 67.5.
By making abutment with the abutting trajectory on the inclined core bar side, the axis of each forming tool maintains 45 ° with respect to the horizontal center line of the coil even if the coil diameter increases or decreases. Can always be centered on the center of the coil to stabilize the quality. The same applies to the left winding processing position.

According to the invention of claim 4, each slide actuating mechanism for moving the slide of each tool actuating device forward and backward comprises a rotatable crank disk and a crank pin erected on the crank disk. , A connecting rod pivotally connected to the crank pin and the lower slide or the upper slide,
Since the drive means for rotating the crank disk is provided, the rotation angle amount of each drive means can be reliably converted as the amount of advance / retreat movement of each slide by the crank movement. Therefore, unlike the cam mechanism in which the cam follower is circumscribed on the disk-shaped cam, jumping does not occur when the drive means rotates at high speed, and high-speed machining of the coil spring manufacturing machine can be achieved.

According to the fifth aspect of the present invention, the lower slide is provided on the lower slide with two tool holders which are capable of abutting the abutting loci at the right-handed machining position and the left-handed machining position, respectively. A mounting hole for selectively positioning and attaching
Further, the upper slide is provided with mounting holes for selectively positioning and detaching the tool holder at two positions where the upper forming tool can abut each abutment trajectory in the right-handed machining position and the left-handed machining position. Therefore, when each tool operating device is set up for the right-handed machining position or the left-handed machining position, there is reproducibility of positioning each forming tool on its abutment trajectory and a short setup time is required. As a result, it is possible to stabilize quality and improve work efficiency.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an entire tool operating device of a coil spring manufacturing machine according to the present invention, and is a front view in a right-handed winding processing position.

FIG. 2 is likewise a front view in a left-handed winding position.

FIG. 3 is also an enlarged view of the lower tool actuating device shown in FIG. 1.

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

FIG. 5 is likewise an explanatory view showing a positional relationship between each reference hole and each fastening bolt hole of each tool actuating device drilled in the substrate, and is a front view thereof.

FIG. 6 is likewise a schematic view showing the arrangement of the forming tools at the right-handed machining position.

FIG. 7 is likewise an explanatory view showing a setup change procedure of the lower forming tool, which is a simplified view at a right-handed winding processing position.

FIG. 8 is also a simplified diagram in which the lower tool actuating device is repositioned to the left-handed machining position.

FIG. 9 is also a simplified diagram in which the lower forming tool is repositioned to the left winding processing position.

FIG. 10 is also a simplified diagram in which the lower forming tool is repositioned to the abutting position of the left-handed winding processing position.

FIG. 11 is an explanatory view of a coil spring manufacturing machine according to a conventional technique, and is a front view thereof.

[Explanation of symbols]

3 quill 10 Lower tool operating device 11 Lower slide operation mechanism 12 Lower slide stand 15 Lower slide 15R Right-handed movement center line (of lower tool actuator) 15L Left-handed movement center line (of lower tool actuator) 21 Tool holder 35R Quill side collision locus (right-handed coil) 40 Upper tool operating device 41 Upper slide operation mechanism 42 Upper slide base 45 Upper slide 45R Right-handed movement center line (of the upper tool actuator) 45L Left-handed movement center line (of the upper tool actuator) 51 tool holder 65R Core metal side collision locus (of right-handed coil) T1 lower forming tool T2 upper molding tool

Claims (5)

[Claims] 1. A coil spring manufacturing machine that sequentially abuts a wire rod fed from a quill with two forming tools to selectively wind a right-handed coil or a left-handed coil, and abuts on the lower side of the coil. It is possible to guide the lower slide that moves the forming groove of the lower forming tool forward and backward along the abutment trajectory corresponding to the increase and decrease of the coil diameter, and the lower slide along a movement center line parallel to the abutment trajectory. A lower slide base that is selectively positioned at two positions, a right-handed processing position where the lower forming tool abuts on the quill side and a left-handed processing position where the lower forming tool abuts on the core metal side, and is fastened to the substrate; This lower slide base is rocked on the substrate, and a lower tool actuating device provided with a rocking shaft for supporting the right winding processing position and the left winding processing position so as to be displaceable is abutted on the upper side of the coil. The forming groove of the upper forming tool corresponds to the increase or decrease of the coil diameter. An upper slide for advancing and retracting along a joint trajectory, and a right-handed machining position and a quill at which the upper slide can be guided along a movement center line parallel to the abutment trajectory and the upper forming tool abuts on the core metal side. The upper slide base that is selectively positioned in two positions, the left-handed machining position and the left-handed machining position that abut against each other, and fastened to the substrate. A coil spring manufacturing machine, comprising: an upper tool actuating device provided with a swing shaft that is displaceably supported at a position. 2. The swing axis of the lower tool actuating device is located at an intersecting position where a right-handed movement center line at the right-handed machining position of the lower slide and a left-handed movement center line at the left-handed machining position converge. And the swing axis of the upper tool actuating device has an intersecting position where a right-handed movement center line at the right-handed machining position of the upper slide and a left-handed movement center line at the left-handed machining position converge as an axis. Item 1. The coil spring manufacturing machine according to Item 1. 3. The right-handed reference hole for positioning the lower-side tool actuating device at the right-handed machining position has a right-handed movement center line of the lower slide upwardly with respect to the quill axis.
At a position where it can be positioned at the right-handed processing position that is inclined by 5 °,
In addition, the left-hand winding reference hole that is positioned at the left-hand winding processing position has a left-hand movement center line which is downward with respect to the quill axis.
The right-winding reference hole for punching the board at a position that can be positioned at the left-handed machining position inclined by 7.5 ° and for positioning the upper tool actuating device at the right-handed machining position is a right-handed movement of the upper slide. The left-hand winding reference hole is positioned at a position where the center line can be positioned in the right-hand winding processing position that is inclined 67.5 ° upward with respect to the quill axis, and the left-hand winding reference hole is positioned in the left-hand processing position. The coil spring manufacturing machine according to claim 1 or 2, wherein the substrate is perforated at a position that can be positioned at a left-handed processing position that is inclined downward by 22.5 °. 4. A lower slide actuating mechanism for advancing and retracting a lower slide of the lower tool actuating device is rotatably attached to the lower slide base rearward of a retreat end of the lower slide. A crank disc, and a crank pin erected at an eccentric position with respect to the center of rotation of the crank disc,
A connecting rod pivotally connected to the crank pin and the lower slide to convert the rotational movement of the crank disc into a linear movement of the lower slide, and the crank disc provided on the lower slide base to rotate the crank disc. An upper slide actuating mechanism, which includes a driving means and moves the upper slide of the upper tool actuating device forward and backward, is a crank pivotally attached to the upper slide base rearward of a retracted end of the upper slide. A disc, a crank pin erected at an eccentric position with respect to the center of rotation of the crank disc, and a pivotal movement of the crank disc that is pivotally connected to the crank pin and the upper slide to advance the upper slide straightly. 4. A connecting rod for converting into motion, and a drive means provided on the upper slide base for rotating the crank disc. The coil spring manufacturing machine according to 1. 5. The lower slide of the lower tool actuating device is provided with a tool holder to which the lower molding tool is attachable / detachable, the lower molding tool at each of the collisions in the right-handed processing position and the left-handed processing position. A mounting hole for selectively positioning and detaching is provided at two positions that can abut each other on the combined trajectory, and a tool holder to which the upper forming tool is detachable is attached to the upper slide of the upper tool operating device. 5. The mounting hole according to claim 1, wherein the tool is provided with mounting holes capable of selectively positioning and attaching at two positions capable of abutting each of the abutting loci at the right-handed machining position and the left-handed machining position. The described coil spring manufacturing machine.