JP3819769B2 - Coil spring making machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coil spring manufacturing machine in which a wire rod fed from a quill is sequentially abutted on two forming tools and selectively wound with a right-handed or left-handed coil. The present invention relates to a coil spring manufacturing machine provided with means for changing the position of a lower forming tool to be mated with an upper molding tool to be abutted on the upper side to a right-handed processing position or a left-handed processing position.
[0002]
[Prior art]
The coil spring manufacturing machine needs to change the position where the two forming tools collide with the coil to the right-handed processing position or the left-handed processing position, depending on whether the coil spring to be wound is right-handed or left-handed. is there. Each tool operating device that operates two forming tools has a mass of 10 to 50 kg. Therefore, the work of detaching and changing the position of each tool operating device to the right-handed or left-handed processing position is a heavy labor. In addition, careful attention to safety work was indispensable, and it took a long time to change the setup. In order to solve such a problem, for example, an invention related to a forming tool operating device disclosed in Japanese Patent Application Laid-Open No. 2000-263172 (hereinafter referred to as a conventional technique) is known.
[0003]
In this prior art, as shown in FIG. 11, the lower tool slide mechanism 104 and the upper tool slide mechanism 205 provided at symmetrical positions across the quill axis line are supported by rotating the disc cams 131 and 231. The forming tools T11 and T12 can be swung around the swing centers 110 and 210, respectively, and the forming tools T11 and T12 can be moved forward and backward by the rotation of the disc cams 122 and 222, respectively. The tool slide mechanisms 104 and 205 do not need to be detached and repositioned when changing the setup from right-handed to left-handed or from left-handed to right-handed.
[0004]
That is, when the right-handed coil shown in FIG. 11 is machined, a forming tool T11 that abuts on the lower side of the coil with the support shaft 110 as a swing center by the rotation of the disc cam 131 of the tool slide mechanism 104. Is swung along an approximate arc locus with respect to the linear quill-side collision locus corresponding to the increase and decrease of the coil diameter, and the disk cam 222 of the tool slide mechanism 205 is rotated to rotate the coil. The advancing / retreating movement center line parallel to the linear far side collision locus corresponding to the increase / decrease of the coil diameter at the abutting point of the forming tool T12 to be abutted on the upper side of the wire Move forward and backward along.
[0005]
Further, when machining the left-handed coil, the abutting point of the forming tool T12 that abuts on the upper side of the coil with the support shaft 210 as the pivot center by the rotation of the disc cam 231 of the tool slide mechanism 205 is linear. The abutting point of the forming tool T11 that is swung along an approximate arc locus with respect to the quill side abutting locus and that abuts on the lower side of the coil by the rotation of the disc cam 122 of the tool slide mechanism 104. Is moved forward and backward along a forward / backward movement center line parallel to the linear far-side collision locus.
[0006]
[Problems to be solved by the invention]
The feature of the prior art is that it is not necessary to remove and change the position of the tool slide mechanisms 104 and 205 when changing the setup from a right-handed winding to a left-handed winding or from a left-handed winding to a right-handed coil. However, in order to make the contact point with the coils of the forming tools T11 and T12 of the present invention correspond to the quill side contact locus and the far side contact locus corresponding to the increase or decrease of the coil diameter, Since the quill-side collision locus and the far-side collision locus are in the upside down position, the tool slide mechanism 104, 205 is caused to swing and linearly move the forming tools T11, T12, respectively. Two control means for controlling these are required.
[0007]
Therefore, the invention for facilitating the setup change of the prior art becomes complicated because the tool operating mechanism of each of the tool slide mechanisms 104 and 205 and the control means for controlling them are indispensable, and its manufacturing cost is also increased. There was a problem of becoming expensive.
[0008]
Furthermore, according to this prior art, the forming tool that collides with the coil on the quill side has a swing locus of the abutting point that corresponds to the increase or decrease of the coil diameter approximates the theoretical straight quill side abutting locus. In particular, when manufacturing different types of coil springs including a coil spring having a large difference between the minimum coil diameter and the maximum coil diameter, there is a problem that an error with respect to a theoretical collision position is large. .
[0009]
The present invention has been made in view of such problems, and its object is to provide a stage of a coil spring manufacturing machine that selectively winds a right-handed or left-handed coil with two forming tools. In a tool operating device that facilitates replacement, there is a problem in that the configuration of each tool operating device of two forming tools and its control means is complicated and the manufacturing cost is expensive, and one forming tool that swings along an arc locus The locus of the collision point with the coil is intended to solve the problem that the error is large with respect to the linear collision locus corresponding to the increase or decrease of the coil diameter.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of claim 1 is a coil spring manufacturing machine for selectively winding a right-handed coil or a left-handed coil by sequentially abutting a wire fed from a quill with two forming tools. A lower slide that moves the forming groove of the lower forming tool that abuts from the lower side in the direction of about 45 ° with respect to the center of the coil along the abutting locus corresponding to the increase or decrease of the coil diameter, and the lower slide Can be guided along a movement center line parallel to the collision locus, and the right-hand machining position where the lower forming tool collides on the quill side and the left-hand machining position where the metal bar collides are selected. Lower slide base that is positioned and fastened to the substrate, and a lower swing shaft that supports the lower slide base on the substrate so as to be swingable between the right-handed processing position and the left-handed processing position. The lower tool actuator with An upper slide that moves the forming groove of the upper forming tool that collides from the upper side in the direction of approximately 45 ° along the abutting locus corresponding to the increase or decrease of the coil diameter, and a movement center that is parallel to the abutting locus. The upper forming tool can be guided along a line and is selectively positioned at two positions, a right-handed working position where the upper forming tool abuts on the core metal side and a left-handed working position where it abuts on the quill side, and is fastened to the substrate. An upper tool operating device provided with an upper slide base and an upper swing shaft that supports the upper slide base so as to be swingable between the right-handed processing position and the left-handed processing position on the substrate. Is.
[0011]
According to the first aspect of the present invention, each tool actuating device for two forming tools can be fastened to the substrate at two positions of a right-handed processing position and a left-handed processing position of each forming tool, Each tool is pivoted about the swing axis of each tool to the right-handed and left-handed positions of each forming tool to enable dislocation and positioned at either the right-handed or left-handed position. As a result, the configuration of each tool operating device and its control means can be simple and inexpensive.
[0012]
Then, in the setup change between the right-handed processing position and the left-handed processing position, the fastening of each tool operating device is released from the substrate and shifted by swinging, and positioned at either the right-handed processing position or the left-handed processing position. This can be done easily. Further, the abutting points between the lower forming tool and the upper forming tool coil are moved forward and backward along the linear abutting locus corresponding to the increase or decrease of the coil diameter at each of the right-handed machining position and the left-handed machining position. So it matches the theoretical collision trajectory.
[0013]
Then, the axis of the lower swing shaft of the lower tool operating device according to the invention of claim 2 is the intersection of the respective movement center lines at the right-handed processing position and the left-handed processing position of the lower slide. The axis of the upper swing shaft of the upper tool actuator is crossing the respective movement center lines at the right-handed processing position and the left-handed processing position of the upper slide. The coil spring manufacturing machine according to claim 1, wherein the coil spring is perpendicular to the substrate.
[0014]
According to the second aspect of the present invention, the lower swinging shaft of the lower tool operating device has the intersection position between the right-handed movement center line and the left-handed movement center line of the lower slide as an axis, and the upper tool The upper swing axis of the actuator is centered on the intersection of the right-handed and left-handed movement centerlines of the upper slide. It can be swung and positioned on each movement center line, and the position can be easily changed even if the mass of each slide is large.
[0015]
Next, according to the invention of claim 3, the right-handed reference hole for positioning the lower tool actuator together with the lower swing shaft at the right-handed machining position is the right-handed movement center line of the lower slide is the quill axis. The left-handed reference hole positioned at a right-handed working position inclined 22.5 ° upward with respect to the left-handed working position is a left-handed working position whose left-handed movement center line is inclined downward 67.5 ° with respect to the quill axis The right-handed reference hole for piercing the substrate at positions that can be positioned at the same position and positioning the upper tool actuator in the right-handed working position together with the upper swing shaft is quilled by the right-handed movement center line of the upper slide. The left-handed reference hole positioned at the right-handed working position inclined 67.5 ° upward with respect to the axis and the left-handed working position has the left-handed movement center line downward with respect to the quill axis. 2.5 is a coil spring manufacturing machine in the invention of claim 1 or 2 so as to pierce the substrate respectively positionable located ° inclined counterclockwise machining position.
[0016]
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 can be positioned at the right-handed machining position inclined 22.5 ° upward with respect to the quill axis. The left-handed reference hole is drilled at a position where the left-handed movement center line can be positioned at the left-handed machining position inclined 67.5 ° downward, and the right-handed reference hole of the upper tool actuator is quilled by the right-handed movement center line. The left-handed reference hole is positioned at a position where it can be positioned at a left-handed processing position where the left-handed movement center line is inclined downward by 22.5 °. Since the drilling is performed, the normal line at the contact point between the forming groove and the coil of each forming tool can always be centered on the center of the coil corresponding to the increase or decrease of the coil diameter.
[0017]
That is, in the right-handed machining position, the movement 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 forming groove movement trajectories of the forming tool and the upper forming tool are also inclined upwards by 22.5 ° or 67.5 °, respectively. If the starting point of this forming groove movement trajectory is the intersection of the perpendicular passing through the center of the coil and the quill axis, the abutting point between the forming groove and the coil of each forming tool is the horizontal center of the coil parallel to the quill axis toward the coil center. The former makes an angle of 45 ° with respect to the line and the latter with an angle of 45 ° upward. Therefore, when the coil diameter is increased / decreased, the lower forming tool is tilted 22.5 ° upward with respect to the quill axis, and the upper forming tool is tilted 67.5 ° upward. By colliding with the collision locus, even if the coil diameter increases or decreases, the contact point between the forming groove of each forming tool and the coil maintains 45 ° with respect to the horizontal center line of the coil toward the coil center. Therefore, the normal line at the abutting 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-handed processing position.
[0018]
Next, the swinging means of each swing shaft of the lower tool operation device and the upper tool operation device according to the invention of claim 4 is formed coaxially with each swing shaft and has the same number of teeth. And a driving gear that rotates the main gear simultaneously with each of the driven gears, and the driving shaft rotates the swinging shafts in the same direction in the same amount through the driven gears. It is what you do.
[0019]
According to the fourth aspect of the present invention, the swinging means of each swinging shaft of the lower tool operating device and the upper tool operating device is formed coaxially with each of the swinging shafts, and each has the same number of teeth. It comprises a main gear meshing simultaneously with each slave gear and a drive means for rotating the main gear, and the swinging shafts are rotated in the same direction and in the same amount via the slave gears by the rotation of the drive means. Therefore, by rotating the main gear with the driving means, the swinging shafts of the lower tool operating device and the upper tool operating device can be simultaneously rotated by the same amount. And it is possible to rotate to the right-handed position and the left-handed position synchronously only by removing the tightening screw without removing the upper tool actuator.
[0020]
Next, a lower slide operating mechanism for moving the lower slide of the lower tool operating device according to the invention of claim 5 forward and backward is rotated by the driving means attached to the lower slide base and the driving means, and An upper slide operating mechanism configured to include a male screw pivotally supported by the lower slide base and a female screw screwed to the male screw and attached to the lower slide, and to move the upper slide of the upper tool operating device forward and backward. A drive means for attachment to the upper slide base, a male screw that is rotated by the drive means and is pivotally supported by the upper slide base, and a female screw that is screwed to the male screw and attached to the upper slide, The coil spring manufacturing machine according to any one of claims 1 to 3, wherein each slide is reciprocated by rotation of each driving means.
[0021]
According to the fifth aspect of the present invention, the lower slide operating mechanism for moving the lower slide of the lower tool operating device forward and backward and the upper slide operating mechanism for moving the upper slide of the upper tool operating device forward and backward are provided on each slide base. Since the attachment driving means, the male screw that is rotated by the driving means and is pivotally supported on each slide base, and the male screw are engaged with each slide, it is constituted by the attachment female screw. Each slide can be reliably reciprocated by movement.
[0022]
Then, the lower slide operating mechanism for moving the lower slide of the lower tool operating device according to the invention of claim 6 forward and backward is rotatable to the lower slide base behind the retracted end of the lower slide. A crank disc pivotally attached to the crank disc, a crank pin erected in an eccentric position with respect to the rotation center of the crank disc, and a pivot of the crank disc pivotally connected to the crank pin and the lower slide A connecting rod for converting the movement into a straight movement of the lower slide; and a driving means provided on the lower slide base for rotating the crank disk; and moving the upper slide of the upper tool operating device forward and backward. The upper slide actuating mechanism is configured to be connected to a crank disc pivotally attached to the upper slide base behind the retreat end of the upper slide and a rotation center of the crank disc. A crank pin erected in an eccentric position, a connecting rod pivotally connected to the crank pin and the upper slide to convert the rotational movement of the crank disc into a straight movement of the upper slide, and the upper slide base provided with the The coil spring manufacturing machine according to any one of claims 1 to 5, further comprising driving means for rotating the crank disk.
[0023]
According to the sixth aspect of the present invention, each slide operating mechanism for moving each slide of each tool operating device forward / backward includes a slide guide capable of guiding each slide, a rotatable crank disc, and the crank circle. A crank pin standing on the plate, a connecting rod pivotally connected to the crank pin and the lower slide, and a driving means for rotating the crank disk are provided. The amount of advancement / retraction of each slide can be reliably converted by the crank motion.
[0024]
Next, on the lower slide of the lower tool operating device according to the invention of claim 7, the lower forming tool has a tool holder to which the lower forming tool can be attached and detached, and the lower forming tool has the right-handed processing position and the left-handed processing position. Are provided with a positioning hole and a mounting hole which can be selectively positioned and detached at two positions where the coil can collide with each other on the abutting locus, and the upper molding tool is provided on the upper slide of the upper tool operating device. A tool holder that can be attached and detached is attached to a detachable positioning hole that is selectively positioned at two positions at which the upper forming tool can collide with the coil on each of the right-handed machining position and the left-handed machining position. The coil spring manufacturing machine according to any one of claims 1 to 6, wherein a hole is provided.
[0025]
According to the seventh aspect of the present invention, the lower slide is provided with a tool holder to which the lower forming tool can be attached and detached, and the lower forming tool is placed on the coil on each collision locus at the right-handed processing position and the left-handed processing position. A mounting hole which can be selectively positioned and attached is provided at two positions where the abutting can be performed, and a tool holder to which the upper forming tool can be attached and detached is placed on the upper slide of the upper tool operating device so that the upper forming tool has a right-handed processing position. Since the mounting holes that can be selectively positioned and removed are provided at two positions that can collide with the coil on each abutting locus at the left-handed machining position, each tool actuator is moved to the right-handed or left-handed machining position. When changing the setup, there is reproducibility of positioning each forming tool on the collision locus, and the setup time can be shortened.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment according to a coil spring manufacturing machine of the present invention will be described as follows with reference to FIGS.
[0027]
1 is a front view of the entire tool operating device at the right-handed machining position, FIG. 2 is a front view of the entire tool operating device at the left-handed processing position, and FIG. 3 is an enlarged view of the lower tool operating device shown in FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along line BB in FIG. 4, and FIG. 6 is a front view showing the positional relationship between each reference hole and fastening bolt hole of each tool operating device. 7 is a layout view of each forming tool at the right-handed processing position, FIG. 8 is a simplified view at the right-handed processing position showing the lower slide and the upper slide when the tool base plate is removed in FIG. 1, and FIG. It is a simplified view when the lower slide and the upper slide are in a left-handed processing position rotated 90 ° clockwise around each swing axis.
[0028]
As shown in FIGS. 1 and 2, the coil spring manufacturing machine includes a pair of feed rollers 2 and 2 for feeding the wire W to the erected substrate 1, a quill 3 for guiding the wire W to a forming space, and a lower molding. A lower tool actuator 10 for abutting the tool T1 on the lower side of the coil, an upper tool actuator 40 for abutting the upper forming tool T2 on the upper side of the coil, and a pitch of a predetermined interval are given to the coil to be wound. A pitch tool Tp for cutting and a cutting tool Tc for cutting the wound coil spring in cooperation with the core metal 4 are disposed.
[0029]
The pair of feed rollers 2 and 2 are pressed against each other by a pressing means (not shown) so as to send out the wire W sandwiched between the outer circumferences of the driving means (not shown). The quill 3 is formed so that the wire W can be inserted, and guides the wire W fed from the pair of feed rollers 2 and 2 to the coil forming space. The metal core 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 pitch tool Tp has a tip portion formed on an inclined surface, and is advanced by an advancing / retreating operation means (not shown) to urge a coil to be wound in a coil forming direction to give a pitch at a predetermined interval. The cutting tool Tc has a cutting edge formed at the corner of the tip, and is advanced by an advancing / retreating operation means (not shown) to cut the coil spring in cooperation with the cored bar 4.
[0030]
Next, as shown in FIGS. 3, 4, and 5, the lower tool operating device 10 for attaching the lower forming tool T <b> 1 has a reamer bolt 13 </ b> A in which the lower slide base 12 serves as a positioning pin on the front surface of the substrate 1. And fastening bolts 13B, 13C, 13D. The lower slide table 12 can be fastened to two positions of the substrate 1, which will be described later, a right-handed processing position and a left-handed processing position, and the outer diameter of the body portion of the reamer bolt 13 </ b> A is a reamer bolt hole of the lower slide table 12. And a right-handed reference hole and a left-handed reference hole, which will be described later, of the substrate 1 so as to be positioned.
[0031]
Further, the lower slide base 12 has an intermediate body portion 24a of a lower swing shaft 24 fastened integrally with the lower slide base 12 supported by a swing hole 1a of the left substrate 1 shown in the drawing. Therefore, it is possible to swing between the right-handed processing position and the left-handed processing position around the lower swing shaft 24. Similarly, in the upper slide table 42, an intermediate body portion 54a of an upper swing shaft 54 that is integrally fastened to the upper slide table 42 is pivotally supported by a swing hole 1b of the left substrate 1 shown in the drawing. It is possible to swing between a right-handed processing position and a left-handed processing position around the upper swing shaft 54. Subordinate gears 70A and 70B are fastened coaxially to the respective oscillating shafts at the ends of the lower oscillating shaft 24 and the upper oscillating shaft 54, and the subordinate gears 70A and 70B are supported by the base 1 on the main gear. 71 is engaged. Further, the main gear 71 meshes with the teeth 73 a of the pinion shaft 73 inserted into the output shaft hole 74 a of the speed reducer 74 fastened to the substrate 1 via the intermediate gear 72.
[0032]
A handle 75 is attached to the input shaft 74 b of the speed reducer 74, and the main gear 71 is rotated via the speed reducer 74, the pinion shaft 73, and the intermediate gear 72 by rotating the handle 75. By rotation of the main gear 71, the spur gears 70A, 70B and the lower swing shafts 24, 54 integrated with the spur gears 70A, 70B are simultaneously swung at the same angle. Here, each of the lower swing shafts 24 and 54 is provided on the substrate 1 with an intersection between a right-handed movement center line and a left-handed movement center line, which will be described later, as the axis, so that each of the swing shafts 24 and 54 is provided. The lower slide table 12 and the upper slide table 42 integrated with each other can swing simultaneously between the right-handed movement center line and the left-handed movement center line around the swing shafts 24 and 54.
[0033]
When swung to the right-handed processing position, the lower slide base 12 is driven by the lower swing shaft 24 and the reamer bolt 13A of the right-handed reference hole 13aR, and the upper slide base 42 is moved by the upper swing shaft 54 and the left-handed reference hole 43aR. The reamer bolt 43A is positioned at the right-handed processing position. When the left-handed processing position is swung, the lower slide base 12 is driven by the lower swinging shaft 24 and the reamer bolt 13A of the left-handed reference hole 13aL, and the upper slide base 42 is moved by the upper swinging shaft 54 and the right-handed reference hole 43aL. The reamer bolt 43A is positioned at the left-handed processing position. After positioning, the slide bases are fastened to the substrate 1 by reamer bolts 13A, bolts 13B, 13C, 13D, reamer bolts 43A, bolts 43B, 43C, 43D.
[0034]
A pair of slide guide plates 14 and 14 are fastened to the recess 12 a formed in the lower slide base 12. The lower slide 15 is formed with a guide groove into which the slide guide plates 14 and 14 are inserted. The lower slide 15 is guided by the slide guide plates 14 and 14 and moves forward and backward on a moving center line defined between them. To do. On the seating surface 15a on the upper surface of the tip of the lower slide 15, a 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 positioning reference hole 20 is formed. The tool base plate 16 is positioned by the positioning reference hole 20 and the adjusting bolt 18 of the base 17 fastened to the lower slide 15.
[0035]
A tool holder 21 is fastened to the tool base plate 16, and a tool insertion hole 21 a through which the lower forming tool T 1 can be inserted is drilled in the longitudinal direction of the tool holder 21. In the vicinity, a cutting groove 21b orthogonal to the tool insertion hole 21a is cut until reaching the tool insertion hole 21a. A cutting groove (not shown) that passes through the center of the tool insertion hole 21a and is orthogonal to the cutting groove 21b is formed on the tip side of the cutting groove 21b. An insertion hole and a female screw of the clamping bolt 23 for tightening the groove are cut. Then, the lower forming tool T1 is inserted into the tool insertion hole 21a of the tool holder 21, and after the adjustment amount is adjusted by the adjusting bolt 22, the lower forming tool T1 is clamped by the clamping bolt 23 at the slit groove portion of the tool holder 21. The lower molding tool T1 is moved forward and backward by the following lower slide operating mechanism 11 together with the lower slide 15.
[0036]
The lower slide operating mechanism 11 includes a ball screw nut 36b attached to the rear upper surface of the lower slide 15 and a ball screw 36a rotatably supported on the rear upper surface of the lower slide base 12 and screwed with the ball screw nut 36b. The rear slide table 12 is composed of a servo motor 67 attached to the rear end surface. The rotation of the servo motor (driving means) 67 is converted into a linear motion of the lower slide 15 which is guided by the slide guide plates 14 and 14 and moves forward and backward by the screw mechanism. The lower tool operating device 10 configured as described above moves the lower forming tool T1 forward and backward together with the lower slide 15 through the ball screw 36a and the ball screw nut 36b by the rotational movement of the servo motor 67.
[0037]
Next, as shown in FIGS. 1 and 2, the upper tool operating device 40 for attaching the upper forming tool T2 includes a reamer bolt 43A and a fastening bolt 43B, in which the upper slide base 42 also serves as a positioning pin on the front surface of the substrate 1. Fastened with 43C and 43D. The upper slide table 42 can be fastened to two positions of the substrate 1, which will be described later, a right-handed processing position and a left-handed processing position, and the body outer diameter of the reamer bolt 43 </ b> A is a reamer bolt hole of the upper slide base 42. The substrate 1 is formed so as to be able to be positioned by engaging with a later-described right-handed reference hole 43aR and a left-handed reference hole 43aL.
[0038]
The upper tool operating device 40 has the same configuration as the lower tool operating device 10 described above, and only the mounting position thereof is different. Therefore, as for the configuration, the same components as those of the lower tool operating device 10 are given the same names, and a code obtained by adding 30 to the code of the lower tool operating device 10 (the lower one digit is common) is described in detail. Is omitted. The upper tool operating device 40 configured as described above moves the lower forming tool T1 forward and backward together with the upper slide 45 through the ball screw 66a and the ball screw nut 66b by the rotational movement of the servo motor 97.
[0039]
Another embodiment of the lower slide actuation mechanism and the upper slide actuation mechanism, that is, the lower slide actuation mechanism 11B and the upper slide actuation mechanism 41B will be described with reference to FIG. The upper slide operation mechanism 41B has the same configuration as the lower slide operation mechanism 11B, and only the mounting position is different. Therefore, as for the configuration, the same components as those of the lower slide operation mechanism 11B have the same names, and the reference numerals of the lower slide operation mechanism 11B added with 30 (the lower one digit is common) will be described in detail. Is omitted. The same reference numerals are used for the same components as those of the lower slide operation mechanism 11 and the upper slide operation mechanism 41 described above.
[0040]
The lower slide operating mechanism 11 </ b> B converts a rotatable crank disk 27, a crank pin 27 a erected on the crank disk 27, and a rotational movement of the crank disk 27 into a straight movement of the lower slide 15. Connecting rod 32 and a servo motor (driving means) 33 (not shown) for rotating the crank disk 27. A crank disk 27 is rotatably attached to the lower slide base 12 behind the rear end of the lower slide 15. A crank pin 27a protrudes from the crank disk 27 at a position eccentric with respect to the center of rotation. The servo motor 33 for driving the crank disk 27 is attached to the lower slide base 12 coaxially with the crank disk 27 and its output shaft is keyed to the crank disk 27.
[0041]
A yoke 29 is erected at the rear end of the lower slide 15. One end of a connecting rod 32 is rotatably attached to the yoke 29 by a pivot shaft 31 fixed to the yoke 29, while the other end of the connecting rod 32 is connected to a crank pin 27a protruding at an eccentric position of the crank disc 27. Mounted rotatably. This crank mechanism converts the rotational movement of the crank disk 27 into the straight movement of the lower slide 15. The lower tool actuating device 10 </ b> B configured as described above has the lower forming tool T <b> 1 together with the lower slide 15 via the crank disk 27, the connecting rod 32, the pivot shaft 31, and the yoke 29 by the rotational movement of the servo motor 67. Move forward and backward.
[0042]
Next, each swing for positioning the lower tool operating device 10 and the upper tool operating device 40 at either the right-handed processing position for winding the right-handed coil spring or the left-handed processing position for winding the left-handed coil spring. The shaft, each reference hole, and each fastening bolt hole will be described with reference to FIG. In FIG. 6, the △ mark indicates the lower tool operating device 10, the □ mark indicates each fastening bolt hole for fastening the upper tool operating device 40 to the respective right-handed machining positions, and the ▲ mark indicates the lower tool operating device. The apparatus 10 and ■ mark indicate the respective fastening bolt holes for fastening the upper tool operating device 40 to the respective left-handed machining positions. Among these, each one hole whose outer frame is a double line indicates each reference hole for fastening each reamer bolt.
[0043]
In the lower tool operating device 10 when winding the right-handed coil spring shown in FIG. 1, the abutting point of the lower forming tool T1 that abuts on the lower side (quill 3 side) of the coil corresponds to the increase or decrease of the coil diameter. The right-handed movement center line 15R of the lower slide 15 that moves forward and backward together with the lower forming tool T1 at this time is at the right-handed machining position that can move forward and backward along the quill-side collision locus 35R (see FIG. 7). The quill-side collision locus 35R is set to 22.5 ° upward with respect to the quill axis (FIG. 6).
[0044]
Further, in the upper tool operating device 40, the abutting point of the upper forming tool T2 that abuts on the upper side of the coil (core metal 4 side) is in the core metal side abutting locus 65R (see FIG. 7) corresponding to the increase or decrease of the coil diameter. The right winding movement center line 45R of the upper slide 45 that moves forward and backward with the upper forming tool T2 at this time is parallel to the core metal side collision locus 65R and is on the quill axis. On the other hand, it is set to 67.5 ° upward (FIG. 6).
[0045]
Similarly, the lower tool operating device 10 when winding the left-handed coil spring shown in FIG. 2 has a coil diameter at the abutting point of the lower molding tool T1 that abuts on the lower side (core metal 4 side) of the coil. The left-handed movement center line 15L of the lower slide 15 that moves forward and backward together with the lower molding tool T1 at this time is located at the left-handed processing position that can move forward and backward along a core-side collision locus (not shown) corresponding to the increase and decrease. It is set to 67.5 ° parallel to the gold side collision locus and downward with respect to the quill axis.
[0046]
Further, the upper tool operating device 40 is capable of moving back and forth along an unillustrated quill-side contact locus in which the contact point of the upper forming tool T2 that contacts the upper side of the coil (the quill 3 side) corresponds to the increase or decrease of the coil diameter. The left-handed movement center line 45L of the upper slide 45 that moves forward and backward with the upper forming tool T2 at this time is set to 22.5 ° parallel to the quill-side collision locus and downward with respect to the quill axis. Has been.
[0047]
Then, the lower swing shaft 24 that shifts the lower tool operating device 10 to the right-handed processing position or the left-handed processing position by swinging is formed with the right-handed movement center line 15R of the lower slide 15 as shown in FIG. With the intersection with the left-handed movement center line 15L as an axis, it is fastened to the back surface of the lower slide base 12 as shown in FIG. As shown in FIG. 4, the lower swing shaft 24 has an intermediate shaft portion 24a engaged with the swing hole 1a of the substrate 1, so that the lower slide base 12 includes a reamer bolt 13A and a fastening bolt. By removing 13B, 13C, and 13D, it is possible to shift by swinging between the right-handed processing position and the left-handed processing position around the lower swing shaft 24.
[0048]
Similarly, the upper swing shaft 54 that shifts the upper tool operating device 40 to the right-handed processing position or the left-handed processing position by swinging is an intersection position between the right-handed movement center line 45R and the left-handed movement center line 45L of the upper slide 45. And is fastened to the back surface of the upper slide table 42. Since the intermediate body 54a of the upper swing shaft 54 is engaged with the swing hole 1b of the substrate 1, the upper slide base 42 can be removed by removing the reamer bolt 43A and the fastening bolts 43B, 43C, 43D. The upper swing shaft 54 can be displaced by swinging between a right-handed processing position and a left-handed processing position.
[0049]
Further, in order to position the lower tool actuator 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. The fastening bolts 13B, 13C and 13D are fastened to the right-handed fastening bolt holes 13bR, 13cR and 13dR, respectively. In order to position in the left-handed processing 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, and 13D are fastened to the left-handed fastening bolt hole 13bL, Fasten to 13 cL and 13 dL, respectively.
[0050]
Similarly, in order to position the upper tool operating device 40 in the right-handed processing 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 bolts 43B and 43C are secured. , 43D are fastened to the right-handed fastening bolt holes 43bR, 43cR, 43dR, respectively. For positioning in the left-handed processing position, the reamer bolt 43A for fastening the upper slide base 42 is engaged with the left-handed reference hole 43aL and fastened, and the fastening bolts 43B, 43C and 43D are left-handed fastening bolt holes 43bL and 43cL. , 43dL.
[0051]
Next, regarding the setup change of each forming tool, the lower tool operating device 10 shown in FIG. 1, FIG. 2, FIG. 8 and FIG. An explanation will be given based on an example in which the upper forming tool T2 of the apparatus 40 is changed from the right-handed processing position to the left-handed processing position.
[0052]
FIG. 1 shows that the lower tool operating device 10 and the lower forming tool T1, and the upper tool operating device 40 and the upper forming tool T2 are in the right-handed machining position. Also, the bolts 19A, 19B and 49A, 49B are removed from the mounting holes 19a, 19b and 49a, 49b, and the tool base plates 16, 46 are removed together with the tool holders 21, 51, the lower forming tool T1, and the upper forming tool T2 (FIG. 8). At this time, the positioning pins (not shown) protruding from the tool base plates 16 and 46 are also removed from the tool positioning pin holes 20 and 50 formed in the lower slide 15 and the upper slide 45 integrally with the tool base plates 16 and 46. It is.
[0053]
Further, the reamer bolt 13A, the bolts 13B, 13C, 13D and the reamer bolt 43A, the bolts 43B, 43C, 43D are removed. Next, when the handle 75 is rotated in a predetermined direction, the lower slide base 12 swings about the lower swing shaft 24 and the upper slide base 42 swings clockwise about the upper swing shaft 54, and the left-handed processing position. (FIG. 9).
[0054]
Next, the reamer bolts 13A and 43A are inserted into the left-handed reference holes 13aL and 43aL shown in FIG. 6 together with the reference holes of the lower slide base 12 and the upper slide base 42, and tightening bolts 13B, 13C and 13D and 43B, 43C and 43D are inserted. Are fastened to the left-handed fastening bolt holes 13bL, 13cL, 13dL and 43bL, 43cL, 43dL, respectively, and the lower slide base 12 and the upper slide base 42 are positioned and fastened to the left-handed processing position. In this way, the lower slide base 12 and the upper slide base 42 are swung around the lower swing shafts 24 and 54 from the right-handed processing positions of the right-hand movement centerlines 15R and 45R shown in FIG. It shifts to the left-handed machining position of the left-handed movement center lines 15L and 45L shown in FIG.
[0055]
Next, together with the lower forming tool T1 and the upper forming tool T2, the tool base plates 16 and 46 are engaged with the common tool positioning pin holes 20 and 50 with positioning pins (not shown) protruding from the tool base plates 16 and 46, respectively. The tool positioning pin holes 20 and 50 are attached to the stopper bolts 18 and 48 in contact with the stopper bolts 18 and 48 at positions rotated 90 ° counterclockwise from the mounting positions at the right-handed machining positions, respectively. , 19B and 49A, 49B are screwed into the mounting holes 19c, 19d and 49c, 49d.
[0056]
Furthermore, since the lower molding tool T1 and the upper molding tool T2 in this state are at positions indicated by alternate long and short dash lines in FIG. 9 and are not positions where they can collide with the left-handed coil, the servo motors 67 and 97 are respectively rotated by a predetermined amount. The side molding tool T1 is moved backward by the movement amount S, and the upper molding tool T2 is moved forward by the movement amount S. As a result, the lower forming tool T1 and the upper forming tool T2 are positioned at the left-handed processing position (FIG. 2).
[0057]
The same applies to the case where the lower forming tool T1 of the lower tool operating device 10 is changed from the left-handed processing position to the right-handed processing position, and the upper forming tool T2 of the upper tool operating device 40 is changed from the left-handed processing position to the right-handed processing position. Therefore, the setup can be easily changed.
[0058]
Subsequently, the coil winding operation of the present example configured as described above will be described based on the example of the right-handed coil shown in FIG.
[0059]
Since the lower slide 15 moves forward and backward along the right-handed movement center line 15R set at 22.5 ° with respect to the quill axis as shown in FIG. 1, it collides with the lower side of the right-handed coil. The lower forming tool T1 to be moved forwards and backwards along a 22.5 ° quill side collision locus 35R parallel to the lower forming tool T1. And even if it moves between the abutting positions Pm and Pn by increasing or decreasing 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.
[0060]
Further, as shown in FIG. 1, the upper slide 45 moves forward and backward along the right-handed movement center line 45R set at 67.5 ° upward with respect to the quill axis. The upper forming tool T2 to be moved forwards and backwards along a 67.5 ° core metal side contact locus 65R parallel to the upper forming tool T2. Even if the coil diameter increases or decreases, 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 even if it moves between the abutting positions Qm and Qn. The 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.
[0061]
The coil spring manufacturing machine according to the present invention is not limited to the embodiment described above, and can be configured in various forms without departing from the gist of the present invention. For example, the drive means for swinging each tool actuating device is an embodiment that is driven by a handle operation. However, it can be driven and controlled by a servo motor instead of the handle operation.
[0062]
【The invention's effect】
Since this invention is as above-mentioned, there exists an effect as described below.
[0063]
According to the first aspect of the present invention, each tool operating device of the two forming tools can be shifted by swinging between the right-handed processing position and the left-handed processing position, and the right-handed processing position or the left-handed processing position can be changed. Since positioning is performed on either one, the configuration of each tool operating device and its control means can be simplified and inexpensive, and the manufacturing cost can be reduced and the handling can be facilitated.
[0064]
In addition, the lower forming tool and the upper forming tool respectively move forward and backward along the linear collision locus corresponding to the increase and decrease of the coil diameter at each of the right-handed processing position and the left-handed processing position. The coil can be wound in line with the collision locus, and the quality of the coil spring can be improved.
[0065]
According to the second aspect of the present invention, the axis of the lower swing shaft of the lower tool operating device passes through the intersecting position of the respective movement center lines at the right-handed processing position and the left-handed processing position of the lower slide. It is perpendicular to the substrate and the axis of the upper swing shaft of the upper tool actuator is perpendicular to the substrate through the crossing position of the respective movement center lines at the right-handed and left-handed positions of the upper slide. As a result, it is possible to swing around each swing shaft without positioning each slide base and position it on each moving center line, and to easily change the position even if the mass of each slide is large. Accordingly, a heavy tool operating device can be performed as a simple light work without using a crane or the like when changing the setup between the right-handed position and the left-handed position.
[0066]
According to the third aspect of the invention, the right-handed reference hole of the lower tool actuating device is located at the right-handed machining position where the right-handed movement center line is inclined 22.5 ° upward with respect to the quill axis. Are drilled at positions where the left-handed movement center line can be positioned at a left-handed machining position inclined 67.5 ° downward, and the right-handed reference hole of the upper tool actuator has a right-handed movement center line with respect to the quill axis. Since the left-handed reference hole is drilled at the position where the left-handed movement center line can be positioned at the left-handed working position where the left-handed movement center line is inclined downward by 22.5 °. The normal line at the contact point between the forming groove of the tool and the coil can always be centered on the center of the coil corresponding to the increase or decrease of the coil diameter.
[0067]
That is, in the right-handed machining position, the lower forming tool and the upper forming tool are respectively at an angle of 45 ° downward and upward with respect to the horizontal center line of the coil parallel to the quill axis, and the lower forming tool is the quill axis. The coil diameter is increased or decreased by making the upper forming tool abut on the core metal side abutting locus inclined 62.5 ° upward on the quill side abutting locus inclined 22.5 ° upward. However, since the axis of each forming tool is maintained at 45 ° with respect to the horizontal center line of the coil, the quality can be stabilized by always concentrating each forming tool on the center of the coil. The same applies to the left-handed processing position.
[0068]
According to the fourth aspect of the present invention, the swinging means of each swinging shaft of the lower tool operating device and the upper tool operating device is formed coaxially with each of the swinging shafts and has the same number of teeth. Since each of the sub-gears is engaged with each of the sub-gears and the main shaft rotates the same amount of the swing shaft through the sub-gears, and the driving unit rotates the main gear. By rotating the gear, each swing shaft of the lower tool operating device and the upper tool operating device can be simultaneously rotated by the same amount, so that the lower tool operating device and the upper tool operating device are removed. It is possible to simultaneously rotate to the right-handed position and the left-handed position simply by removing the tightening screw. As a result, the setup time can be shortened and light work can be achieved.
[0069]
According to the fifth aspect of the present invention, the lower slide operating mechanism and the upper slide operating mechanism include a driving means attached to each slide base, and a male screw that is rotated by the drive means and is pivotally supported by each slide base. Since each screw is engaged with the male screw and is attached to each slide, each slide can be reliably reciprocated by rotation of each driving means. Therefore, jumping does not occur when the drive means rotates at a high speed as in the cam mechanism in which the cam follower is circumscribed by the disc-shaped cam, and it is easy to cope with the high-speed machining of the coil spring manufacturing machine.
[0070]
According to the sixth aspect of the present invention, each slide operating mechanism for moving the slide of each tool operating device forward / backward includes a rotatable crank disc, a crank pin standing on the crank disc, and the crank Since the connecting rod pivotally connected to the pin and the lower slide or the upper slide and the driving means for rotating the crank disk are provided, the amount of rotation angle of each driving means is adjusted by the crank motion. The amount of movement can be reliably converted. Therefore, jumping does not occur when the driving means rotates at a high speed as in the cam mechanism in which the cam follower is circumscribed by the disc-shaped cam, and the coil spring manufacturing machine can be processed at a high speed.
[0071]
According to the seventh aspect of the invention, the lower holder is provided with the tool holder at two positions where the lower forming tool can collide with the coil on each abutting locus at the right-handed machining position and the left-handed machining position. A mounting hole which can be selectively positioned and attached is provided, and the upper slide has a tool in two positions where the upper forming tool can collide with the coil on the respective abutting locus at the right-handed machining position and the left-handed machining position. Since the holder is provided with a mounting hole that can be selectively positioned and attached, each forming tool is positioned on the collision locus when each tool actuator is changed to the right-handed or left-handed position. Reproducibility and setup time can be shortened. As a result, quality can be stabilized and work efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing the whole of a tool operating device of a coil spring manufacturing machine according to the present invention, and is a front view at a right-handed processing position.
FIG. 2 is also a front view at a left-handed processing position.
3 is an enlarged view of the lower tool operating device shown in FIG.
4 is a cross-sectional view taken along the line AA in FIG.
5 is a cross-sectional view taken along the line BB in FIG.
FIG. 6 is also an explanatory view showing the positional relationship between each reference hole and fastening bolt hole of each tool operating device drilled in a substrate, and is a front view thereof.
FIG. 7 is also a simplified diagram showing the arrangement of the forming tools at the right-handed machining position.
FIG. 8 is also a simplified view when the lower slide and the upper slide are in the right-handed processing position when the tool base plate is removed.
FIG. 9 is also a simplified view when the lower slide and the upper slide are in the left-handed processing position when the tool base plate is removed.
FIG. 10 is a view similarly showing another embodiment of the slide operation mechanism.
FIG. 11 is an explanatory view of a conventional coil spring manufacturing machine and a front view thereof.
[Explanation of symbols]
3 Quill
10 Lower tool actuator
11 Lower slide operation mechanism
12 Lower slide base
15 Lower slide
15R Right-hand movement center line (of lower tool actuator)
15L Left-handed movement center line (for lower tool actuator)
16 tool plate
21 Tool holder
35R Quill side collision trajectory (right-handed coil)
40 Upper tool actuator
41 Upper slide operation mechanism
42 Upper slide base
45 Upper slide
45R Right-handed movement center line (upper tool actuator)
45L Left-handed movement center line (on the upper tool actuator)
46 tool plate
51 Tool holder
65R Core metal side collision locus (right-handed coil)
66a ball screw
66b ball screw nut
T1 Lower molding tool
T2 Upper forming tool

Claims (7)

A coil spring manufacturing machine for sequentially winding a right-handed coil or a left-handed coil by sequentially abutting a wire fed from a quill with two forming tools,
A lower slide that moves the forming groove of the lower forming tool that abuts from the lower side in the direction of about 45 ° with respect to the coil center along the abutting locus corresponding to the increase or decrease of the coil diameter, and the lower slide Can be guided along a movement center line parallel to the collision locus, and is selectively selected from two positions, a right-handed machining position where the lower forming tool collides on the quill side and a left-handed machining position where the lower metal tool collides on the metal core side. A lower slide base that is positioned on and fastened to the substrate, and a lower swing shaft that supports the lower slide base on the substrate so as to be swingable between the right-handed processing position and the left-handed processing position. A lower tool actuating device provided with
An upper slide that moves the forming groove of the upper forming tool that abuts from the upper side in the direction of approximately 45 ° with respect to the center of the coil along the abutting locus corresponding to the increase or decrease of the coil diameter, and the upper slide The substrate is selectively positioned at two positions, a right-handed processing position where the upper forming tool abuts on the core metal side and a left-handed processing position where it abuts on the quill side. An upper tool actuating device provided with an upper slide base fastened to the base and an upper swing shaft for swinging the upper slide base between the right-handed processing position and the left-handed processing position on the substrate; A coil spring manufacturing machine comprising: The axis of the lower swing shaft of the lower tool actuator is perpendicular to the substrate through the crossing position of the movement center line at the right-handed processing position and the left-handed processing position of the lower slide, And,
The axis of the upper swing shaft of the upper tool actuator is perpendicular to the substrate through an intersection position of the respective movement center lines at the right-handed processing position and the left-handed processing position of the upper slide. The coil spring manufacturing machine described. The right-handed reference hole for positioning the lower tool actuating device at the right-handed machining position together with the lower swinging shaft is tilted 22.5 ° upward with respect to the quill axis. The left-handed reference hole that is positioned at the right-handed processing position and the left-handed processing position is drilled in the substrate at positions where the left-handed movement center line can be positioned at the left-handed processing position inclined 67.5 ° downward with respect to the quill axis. And
The right-handed reference hole for positioning the upper tool actuator in the right-handed machining position together with the upper swing shaft is a right-handed winding whose right-handed movement center line of the upper slide is inclined upward 67.5 ° with respect to the quill axis. The left-handed reference hole positioned at the processing position and the left-handed processing position is formed by drilling the substrate at a position where the left-handed movement center line can be positioned at a left-handed processing position inclined 22.5 ° downward with respect to the quill axis. The coil spring manufacturing machine according to 1 or 2. The oscillating means of the oscillating shafts of the lower tool operating device and the upper tool activating device are formed coaxially with the oscillating shafts and mesh with the slave gears of the same number of teeth and the slave gears simultaneously. 4. The method according to claim 1, further comprising: a gear and a driving means for rotating the main gear, wherein the swinging shafts are rotated in the same amount and in the same direction via the slave gears by the rotation of the driving means. Coil spring making machine. A lower slide operating mechanism for moving the lower slide of the lower tool operating device forward and backward is attached to the lower slide base and pivoted by the drive means and pivotally supported by the lower slide base. A male screw and a female screw screwed to the male screw and attached to the lower slide; and
The upper slide actuating mechanism for moving the upper slide of the upper tool actuating device forward and backward includes a driving means attached to the upper slide base, a male screw pivoted by the driving means and pivotally supported by the upper slide base, and the male screw, It is composed of a female screw that is screwed and attached to the upper slide,
The coil spring manufacturing machine according to any one of claims 1 to 4, wherein the slides are reciprocated by rotation of the drive means. A lower slide operating mechanism for moving the lower slide of the lower tool operating device forward and backward is a crank disk pivotally attached to the lower slide base at a rear side of a retracted end of the lower slide. A crank pin standing in an eccentric position with respect to the rotation center of the crank disk, and a pivot movement of the crank disk pivotally connected to the crank pin and the lower slide. A connecting rod for converting into a lower slide, and a drive means provided on the lower slide base for rotating the crank disk, and
The upper slide operating mechanism for moving the upper slide of the upper tool operating device forward and backward is a crank disc pivotally attached to the upper slide base so as to be rotatable behind the retreat end of the upper slide, and the crank disc A crankpin that is erected in an eccentric position with respect to the rotation center, and a connecting rod that is pivotally connected to the crankpin and the upper slide to convert the rotation movement of the crank disc into a rectilinear movement of the upper slide; The coil spring manufacturing machine according to any one of claims 1 to 4, further comprising: a driving unit that is provided on an upper slide base and rotates the crank disk. On the lower slide of the lower tool operating device, a tool holder to which the lower forming tool can be attached and detached is coiled on each collision locus at the right-handed processing position and the left-handed processing position. Provided with mounting holes that can be selectively positioned and removed at two positions that can collide with each other, and
On the upper slide of the upper tool actuator, a tool holder to which the upper forming tool can be attached and detached can be brought into contact with the coil on the respective abutting locus at the right-handed machining position and the left-handed machining position. The coil spring manufacturing machine according to any one of claims 1 to 6, wherein attachment holes that can be selectively positioned and attached are provided at two positions.

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