JP5603003B2 - Wire spring forming equipment - Google Patents

Description

  According to the present invention, a plurality of forming tools arranged radially around a quill for guiding a wire is directed to a wire spring forming stage at the tip of the quill at a right angle or a substantially right angle with respect to the axis of the wire guided by the quill. It is related with the apparatus which shape | molds a wire spring by making it move forward and abutting with the wire sent out from a quill.

  Conventionally, as a wire spring forming apparatus, for example, a wire rod feeding means having a pressure roller feeds a wire rod from a front quill to a molding stage, and a plurality of types of molding tools arranged radially around the quill are arranged with respect to the axis of the wire rod. An apparatus for forming a wire spring by making it advance toward a wire spring forming stage at the tip of the quill at a right angle or substantially at a right angle, colliding with a wire fed from the quill, bending, bending or winding, and forming a wire spring. A configuration has been proposed in which the quill moving means is configured to be movable in the axial direction of the wire, and servo motors that are respective drive sources such as a wire pressure feeding means and a quill moving means are linked by a control device ( Patent Document 1).

  On the other hand, when measuring the quality of a spring such as a wire spring, there is provided a capacitance detecting means for detecting the capacitance of the coil spring to be measured, and the electric capacitance value detected by the capacitance detecting means and the reference coil spring Has been proposed in which it is determined whether or not the difference from the electrical capacity value obtained from the above is within the range of the capacity upper and lower limit values (see Patent Document 2).

Japanese Patent No. 3744910 JP 2003-340541 A

However, in measuring the quality of a spring such as a wire spring, in the prior art, in the capacitance detection, a dedicated measurement device for measuring the capacitance must be provided, and other measurement devices, for example, Even if an image sensor system or a laser inspection system is used, a dedicated measuring device must be provided, which increases the complexity and cost.

  The present invention has been made in view of the problems of the prior art described above, and an object of the present invention is to apply a driving unit for driving a forming tool to a driving unit for driving a measurement tool. It is to provide a spring forming apparatus.

In order to achieve the object, in the wire spring forming apparatus according to claim 1,
Wire rod feeding means for feeding the wire rod to the forming stage;
Conveying means arranged to move forward and backward with respect to the molding stage;
A molding tool that is transported by the transport means and forms the wire as a wire spring at the molding stage;
A measurement tool that is transported by a transport means that carries the forming tool and that measures the wire spring based on the measurement of the amount of movement;
Driving means for advancing and retracting the conveying means;
Control means for controlling the drive of the drive means,
The control unit controls driving of the driving unit according to molding by the molding tool during molding of the wire, and controls driving of the driving unit according to measurement by the measuring tool during measurement of the wire spring. The configuration is as follows.

  (Operation) The control means controls the driving of the driving means in accordance with the forming by the forming tool when forming the wire, and controls the driving of the driving means in accordance with the measurement by the measuring tool when measuring the wire spring. The driving means for driving the molding tool can be applied to the driving means for driving the measurement tool, and the configuration can be simplified.

In the wire spring forming apparatus according to claim 2,
Wire rod feeding means for feeding the wire rod to the forming stage;
A plurality of conveying means arranged to move forward and backward with respect to the molding stage;
A molding tool that is transported by each of the transport means and forms the wire as a wire spring at the molding stage;
A measurement tool that is transported by any of a plurality of transport means that carries the forming tool, and that measures the wire spring based on the measurement of the amount of movement;
A plurality of driving means for driving the respective conveying means forward and backward, and
A driving means used when forming the wire rod or a driving means used when measuring the wire spring is selected from the plurality of driving means, and a control means for controlling the driving of the selected driving means is provided.

  (Operation) At the time of forming a wire rod, a driving tool to be used at the time of forming the wire rod is selected from a plurality of driving devices, and the driving of the selected driving device is controlled, so that the molding tool can be conveyed to the molding stage. . After the wire rod is formed into a wire spring, the driving tool used when measuring the wire spring is selected from a plurality of driving devices, and the driving of the selected driving device is controlled, so that the measuring tool is conveyed to the forming stage. be able to. For this reason, the drive means for driving the forming tool can be applied to the drive means for driving the measurement tool, and the configuration can be simplified.

In the wire spring forming apparatus according to claim 3,
In the wire spring forming device according to claim 1 or 2,
The control means starts measuring the amount of movement of the measurement tool as the drive means is driven during measurement of the wire spring, and detects that the measurement tool has approached the wire spring and has detected the wire spring. As a condition, the measurement of the amount of movement of the measurement tool is terminated, and the quality of the wire spring is determined from the measurement result.

  (Operation) When the driving unit corresponding to the measurement tool used for measuring the formed wire spring is driven, the control unit starts measuring the movement amount of the measurement tool, and confirms that the measurement tool has detected the wire spring. Under the condition, the measurement of the movement amount of the measurement tool is completed, and the quality of the wire spring can be determined from the measurement result. That is, after forming a wire spring using a forming tool, the quality of the wire spring can be determined by moving the measuring tool and measuring the amount of movement of the measuring tool.

  As apparent from the above description, according to claim 1, the driving means for driving the molding tool can be applied to the driving means for driving the measurement tool.

  According to the second aspect, the driving means for driving the molding tool can be applied to the driving means for driving the measuring tool.

  According to claim 3, the quality of the molded wire spring can be determined.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 20 show a wire spring forming apparatus according to a first embodiment of the present invention, FIG. 1 is an overall front view of the apparatus, and FIG. 2 is a left side view of the apparatus partially shown in cross section. 3 is a horizontal sectional view around the rotating frame, FIG. 4 is an enlarged sectional view around the quill, FIG. 5 is a front view of the bending tool as seen from the front side of the wire spring forming device, and FIG. 6 is a longitudinal section of the bending tool. FIG. 7 is a perspective view of the main part of the bending tool, FIG. 8 is a plan view of the coil forming tool, and FIG. 9 is a longitudinal sectional view of the coil forming tool. 8 is a cross-sectional view taken along line IX-IX shown in FIG. 8, FIG. 10 is a diagram showing the arrangement of the right and left-handed coil forming tool bodies in the tool holder, and FIG. 11 is one of the wire springs formed by the apparatus. FIG. 12 is a perspective view showing an example, FIG. 12 is an arrangement view of various molding tools on the molding stage, and FIGS. 15 is a diagram showing a process of molding the wire spring shown in FIG. 11, FIG. 16 is a diagram showing time sharing of the process of molding the wire spring shown in FIG. 11, and FIG. 17 is a block configuration diagram of the multi-axis numerical controller. 18 is a block diagram of a driver, FIG. 19 is a cross-sectional view of a forming tool and a measurement tool, FIG. 20 is a schematic diagram for explaining a method for determining the quality of a wire spring, and FIG. It is a flowchart for demonstrating the effect | action of time.

  In these drawings, the wire spring forming apparatus shown in the present embodiment is a pair of pressure-feed rollers that send the pinched wire 1 to a front forming stage 100 (see FIGS. 1, 2, and 6) via a quill 10 that is a wire guide. The wire rod pressure feeding means 20 having 22 and 22 and the wire rod pressure feeding means 20 including the pressure roller 22 are revolved around the axis X1 of the wire rod 1 to twist the wire rod 1 so that the wire rod 1 is fed from the tip of the quill 10. Revolving means 30 for changing the relative position in the circumferential direction with respect to 100, quill rotating means 40 for rotating the quill 10 around the axis XI of the wire 1, and radially arranged on the forming stage 100, or perpendicular to the axis XI of the wire 1 A plurality of (in the embodiment, five) molding tools 120 (120A to 120E) capable of moving back and forth substantially at right angles, and moving a predetermined molding tool 120 forward Te, bending the wire 1 by abutting on the wire 1 fed to the molding stage 100 from the front end of the quill 10, by bending or wound, and is configured to shape the wire spring.

  Reference numeral 2 in FIGS. 1 and 2 supports the wire rod feeding unit 20, the revolution unit 30, the quill rotating unit 40, the molding stage 100, and the like from below, and the driving of the wire rod feeding unit 20, the revolution unit 30 and the quill rotating unit 40 is performed. Of course, it is a rectangular frame in which a multi-axis numerical control device for positioning drive for linking operation of servo motors as drive sources of various drive units in the wire spring forming apparatus is accommodated.

  Reference numeral 3 denotes a fixed frame provided on the gantry 2, and a main plate 102 constituting the forming stage 100 is vertically fixed and integrated with the fixed frame 3, and the axis of the wire 1 is centered on the main plate 102. It arrange | positions so that X1 may correspond.

  The fixed frame 3 is provided with a linear way slide 50 (see FIG. 2) which is a quill moving means that moves forward and backward along the axis X1 of the wire 1. That is, a slide table 52 in which the wire rod pressure feeding unit 20, the revolving unit 30 and the quill rotating unit 40 are integrally mounted via the slide frame 4 is assembled to the fixed frame 3 so as to be slidable along the axis X1 of the wire 1. It has been. For this reason, the slide table 52 can advance and retreat along the axis X1 of the wire 1 via the ball screw 54 that is rotationally driven by the servo motor M50 installed in the fixed frame 3.

  That is, a predetermined forming tool 120 is advanced toward the forming stage 100 and is brought into contact with the wire 1 fed from the tip end portion of the quill 10 to the forming stage 100, whereby the wire 1 is bent, bent or wound. Although the wire spring is formed, the diameter of the coil to be formed is proportional to the distance between the forming tool 120 and the quill 10. Therefore, by adjusting the movement position of the slide table 52 (quill 10) by numerical control of the servo motor M50. The coil diameter of the wire 1 to be coiled can be freely adjusted.

  2, 3, and 4, the wire pressure feeding unit 20 transmits a pair of pressure feeding rollers 22, 22, a servo motor M 22 for driving the pressure feeding roller, and driving of the servo motor M 22 to the pressure feeding roller 22. A normal wire rod straightening mechanism 28 that is disposed behind the gear mechanisms a to f and the pressure roller 22 to correct the bending of the wire rod 1, holds the bending of the wire rod 1 in a certain direction, and sends the wire rod 1 to the wire rod straightening mechanism 28. It is mainly composed of a guide ring mechanism 29 equipped with several guide rollers 29a.

  A disk portion 21a of the rotating frame 21 is rotatably supported on the slide frame 4 via a cross roller bearing 31, and is rectangular so as to be eccentric with respect to a wire rod through hole 24 provided at the center of the disk portion 21a. The gear accommodating part 21b (refer FIG. 3) is provided, and the pressure feeding rollers 22 and 22 are provided in the outer surface of the gear accommodating part 21b so that the wire conveyance path which passes along the wire through-hole 24 may become a straight line.

  As shown in FIG. 3, the driving force of the servo motor M22 fixed to the disk portion 21a is transmitted to the pressure feeding rollers 22 and 22 through a gear mechanism (gear train) constituted by a plurality of gears a to f. Is done. That is, the servo motor M22 is driven from the gear a provided on the output shaft, the dual gears b1 and b2 supported on the disk portion 21a, and the gears c and d1 of the rotary shaft 23 supported on the disk portion 21a. The pressure is transmitted to the pressure roller 22 through the gear d2, the gear e, and the gear f in the housing portion 21b.

  Reference numeral 25 (see FIG. 4) is fixed to the outer surface of the gear housing portion 21a of the rotating frame 21, and is a wire guide for guiding a wire provided on the inlet side of the pressure feeding rollers 22, 22. Reference numeral 26 is a rotating frame. This is an intermediate quill 26 fixed to the front end of 21.

  On the outer periphery of the intermediate quill 26, a quill 10 rotatably supported on the slide frame 4 via bearings 12a and 12b is provided so as to be rotatable relative to the intermediate quill 26. The wire 1 corrected by the guide ring mechanism 29 and the wire straightening mechanism 28 passes through the through hole 24 of the rotating frame 21, passes through the wire guide 25, is guided to the pair of pressure feeding rollers 22 and 22, and passes through the intermediate quill 26. It is guided by the quill 10 and sent to the front wire spring forming stage 100.

  The revolution means 30 is configured such that the entire wire rod pressure feeding means 20 assembled to the slide frame 4 is provided around the axis X1 of the wire 1 so as to be revolved. That is, the rotating frame 21, the wire straightening mechanism 28, and the guide ring mechanism 29 constituting the revolving means 30 are integrated as a revolving unit U1 (see FIGS. 2 and 3), and the rotating frame located at the front end of the revolving unit U1. 21 (disk portion 21a) is rotatably supported with respect to the slide frame 4 via the cross roller bearing 31, and the rear end frame 29b of the guide ring mechanism 29 located at the rear end portion of the revolution unit U1 is moved from the slide table 52. The L-shaped frame 4a extending rearward is rotatably supported via a bearing 32.

  As shown in FIG. 2, the output shaft of the servo motor M30 installed on the slide table 52 is provided with a pinion gear 34 that meshes with the ring gear 33 fixed to the disk portion 21a of the rotating frame 21, and the servo motor M30. As a result, the entire revolution unit U1 (wire rod feeding means 20) rotates around the axis X1.

  That is, when the wire rod feeding means 20 revolves around the axis X1 of the wire rod 1, the wire rod 1 is twisted, and the relative position in the circumferential direction of the wire rod 1 fed from the quill 10 with respect to the forming stage 100 changes.

  For this reason, by setting the rotation amount of the servo motor M30 by numerical control, the wire 1 in the forming stage 100 is twisted in the circumferential direction to an optimum position for abutting with predetermined forming tools 120 arranged radially. Will be positioned. For this reason, without positioning the forming tool 120 with respect to the wire 1, the predetermined forming tool 120 is advanced and retracted with respect to the wire 1 sent to the forming stage 100 so as to make contact with each other. Can be molded.

  As shown in FIGS. 2 and 4, the quill rotating means 40 includes a quill 10 that is rotatably supported by the slide frame 4 via bearings 12 a and 12 b, a gear 44 that is integrated with the outer periphery of the quill 10, An intermediate gear 46 that is supported by the slide frame 4 and meshes with the gear 44, and a pinion gear 48 that is provided on the output shaft of the quill rotation servomotor M 40 and meshes with the intermediate gear 46. Then, by driving the servo motor M40, the quill 10 is independently rotated separately from the revolution of the whole wire rod feeding means 20 by driving the servo motor M30, and the circumferential direction of the quill 10 with respect to the predetermined forming tool 120 is rotated. The posture can be adjusted.

  In addition, as shown in FIGS. 1 and 2, a plurality of (mains) wires are perpendicular to the axis X1 in the extending direction of the axis X1 of the wire 1 that coincides with the center of the main plate 102 (wire spring forming stage 100). In the embodiment, eight linear slides 110 are arranged radially. The linear slide 110 is provided with a first servo motor M110 as a drive source for moving a tool slide table 112 loaded with various forming tools 120A to 120E forward and backward with respect to the wire spring forming stage 100 at the tip of the quill 10. ing.

  2, 6, and 9, a crank mechanism that converts rotation of the servo motor M <b> 110 into linear motion between the output shaft of the servo motor M <b> 110 installed on the main plate 102 and the tool slide table 112. 114 is interposed to control the forward / backward movement of the tool slide table 112.

  The types of the forming tool 120 used in this embodiment are “bending forming tools” 120A and 120B used for bending the wire, “coil forming tools” 120C and 120D for forming the wire into a coil shape, and cutting the wire. There is a “cut-forming tool” 120E used in the process, and the “cut-forming tool” 120E has a conventionally known configuration. Therefore, the “bending tool” 120A, 120B and the “coil-forming tool” 120C, which are special configurations, 120D will be described in detail.

  As shown in FIGS. 1, 2, 5, and 6, a ring gear 104 is rotatably supported on the back side of the main plate 102 so as to surround the molding stage 100. Reference numeral 104 a in FIG. 6 is a bearing that supports the ring gear 104. Then, the ring gear 104 is rotated by driving the second servo motor M121 (see FIG. 1), and the respective gear-type power transmission mechanisms 129 provided at the positions corresponding to the bending tools 120A and 120B are respectively used. In the bending tools 120A and 120B, the rotating body 124 of the rotating unit 121 is configured to rotate. Note that reference numeral 105 in FIG. 1 is a gear attached to the output shaft of the servo motor M121 and meshes with the ring gear 104.

  5, 6, and 7 show details of the bending tool 120 </ b> A. On the tool slide table 112 constituting the bending tool 120A, a fixed core metal 123 provided with a wire engaging groove 123a on the front end surface facing the axis X1 of the wire 1, and also facing the axis X1 of the wire 1 A wire-forming rotation unit 121 is provided that includes a wire-engagement protrusion 124 a on the front end surface, and a rotating body 124 that is rotatably supported on the outer periphery of the fixed core 123.

  Reference numeral 122 denotes a housing for accommodating the bending and rotating unit 121 on the tool slide table 112. In the housing 122, as shown in FIG. The gear 124b provided on the outer periphery of the rear end portion of the rotating body 124 and the gear 125a provided on the outer periphery of the driven shaft 125 are engaged with each other.

  A spline shaft 126 is coaxially integrated with the driven shaft 125, and the spline shaft 126 is engaged with a rotary cylinder 126 a that is rotatably supported by a frame 122 a fixed to the main plate 102. doing. For this reason, the spline shaft 126 and the rotating cylinder 126a are fixed in the circumferential direction at the spline engaging portion 129a and rotate integrally, but can slide relative to each other in the axial direction (arrow direction in FIG. 6). Yes.

  In addition, a 45-degree screw gear 126b is provided on the outer periphery of the rotary cylinder 126a, and the screw gear 126b of the vertical rotation shaft 127 with a pinion 127b that meshes with the ring gear 104 provided on the back side of the main plate 102. A gear-type power transmission mechanism 129 is configured to mesh with the 45-degree screw gear 127a.

  That is, the shaft support portion of the vertical rotation shaft 127 is attached and fixed to the vertical shaft mounting hole 106 (see FIG. 1) provided near the linear slide 110 of the main plate 102, and the vertical rotation shaft 127 is fixed to the main plate 102. And the rotation of the ring gear 104 is transmitted to the rotating cylinder 126a and the driven shaft 125 via the vertical rotating shaft 127 and the screw gears 127a and 126b, and further to the gears 125a and 124b. Is transmitted to the rotator 124 via.

  The driving force of the motor M110 is transmitted as a force for moving the tool slide table 112 back and forth via the crank mechanism 114. The rotating unit 121 and the driven shaft 125 mounted on the tool slide table 112 by the housing 122 are Since the spline shaft 126 integrated with the driven shaft 125 and the coupling engagement portion (spline engagement portion) 129a between the rotating cylinder 126a supported by the main plate 102 via the frame 122a can slide in the axial direction. By driving the servo motor M110, the tool slide table 112 (bending tool 120A) slides smoothly (back and forth operation).

  Therefore, the servo motor M11 is driven to advance the bending tool 120A, and the servo motor M121 is driven to rotate in a state where the wire 1 is engaged with the groove 123a of the core metal 123 as shown in FIG. When the body 124 is rotated, the wire 1 hooked to the wire hooking projection 126 is bent around the engaging portion with the groove 123a of the core metal 123, and the wire 1 can be bent. Note that the wire 1 can be bent in either the left or right direction depending on the rotation direction of the rotating body 124.

  The bending root 120B has the same structure as the bending tool 120A, and a detailed description thereof is omitted.

  The ring gear 104 is rotated by the drive of the servo motor M121, and the rotation units 121 (rotary bodies 124) of the bending tools 120A and 120B are simultaneously rotated. However, only one rotary unit 121 (rotary body 125) of the bending tool 120A or 120B is used for molding, and the other is not used for molding, and is merely idle. Accordingly, the load acting on the servo motor M121 is not so large compared to the case where only the rotating unit (rotary body) of the forming tool used directly for forming is driven alone, and the rotating unit 121 is smooth and speedy. The wire 1 can be bent by rotating the (rotating body 124).

  In addition, the position where the servo motor M121 is disposed is located below the main plate 102, the center of gravity of the entire main plate 102 is downward, and the bending load due to the weight of the servo motor M121 acting on the main plate 102 is small. The stability of the main plate 102 is ensured.

  Details of the coil forming tools 120C and 120D are shown in FIGS. The coil forming tools 120C and 120D are provided with a tool slide table 112 that constitutes the coil forming tool and capable of moving back and forth, and a tool holder 132 that is a rotating body 133 having a rotation axis 133 parallel to the tool slide table advance and retract direction. And a tool rotating unit 131 provided with a pair of coil forming tool bodies 134A and 134B facing each other across the rotating shaft 133, and a servo motor M132 for rotating the rotating unit 131 (tool holder 132). It has become.

  Reference numeral 132a is a gear attached to the output shaft of the servo motor M132, and reference numeral 133a is a gear attached to the rotary shaft 133. When the gears 132a and 133a are engaged with each other, the motor driving force is transmitted.

  In this coil forming tool 120C, the arrangement of the left-handed tool body 134A and the right-handed tool body 134B can be reversed by driving the servo motor M132. The tool bodies 134A and 134B for right and right-hand use can be easily switched.

  Further, as shown in FIG. 10, the left and right side corners of the flat rectangular block-shaped tool holder 132 are counterclockwise so that the respective wire abutting surfaces 136 formed with the wire engaging grooves 136a are opposite to each other. When the tool body 134A and the right-hand tool body 134B are arranged and the coil is formed using either the right-hand or left-hand tool body, the formed coil extends without interfering with the tool holder 132. Therefore, it is possible to reliably form long legs for both right-handed and left-handed coils.

  The coil is formed by abutting the wire 1 with the wire-engaging groove 136a. At the time of forming the coil, the servo motor M132 is driven so that the rotation unit 131 (tool holder 132) is a minute amount. The initial tension of the coil to be molded can be adjusted by rotating and shifting the wire engaging groove 136a with respect to the wire 1 by a predetermined amount (a small amount). The adjustment of the initial tension of the coil can be easily set by numerically controlling the drive of the servo motor M132.

  The coil forming tool 120D has the same structure as the coil forming tool 120C, and a detailed description thereof will be omitted.

  In addition, holes 106 for disposing gear-type power transmission mechanisms 129 (vertical rotating shafts 127) indispensable for bending tools are provided in advance at the respective positions (circumferentially equal positions) on the main plate 102. Since the bending tools 120A and 120B can be arranged at any molding tool arrangement position, the degree of freedom in designing how various molding tools are arranged is high. It is easy to do.

  Next, an operation for forming a wire spring using the wire spring forming apparatus shown in the present embodiment will be described with reference to FIGS.

  FIG. 11 is a perspective view showing an example of a wire spring to be molded, and the molding sequence starting from the part a will be described. FIG. 12 shows the arrangement of the forming tools, T1 and T4 are the coil forming tools 120C and 120D (the tool body), T2 and T5 are the bending tools 120B and 120A (the tool body), and T3 is the cutting tool. 120E (the tool body) is shown.

  Further, the coil forming tool T1 uses the coil forming tool 120C exclusively for left-handed winding (only the left-handed tool body 134A is used), and the coil-forming tool T4 uses only the coil forming tool 120D for right-handed winding (right-handed tool body 134B). Just use). Further, in the bending tool T2, the bending tool 120B is used exclusively for left bending, and in the bending tool T5, the bending tool 120A is used exclusively for right bending.

  In FIG. 12, M1 to M5 are arrangement numbers of the servo motor M110 for moving the tool slide table 112 mounted with the forming tools T1 to T5, and M9 is a servo motor for rotating the coil forming tool T1. M132 is an arrangement number of the bending tool T2 and T5 rotation servomotor M121, and M11 is an arrangement number of the slide table 52 slide servomotor M50 which is a quill advance / retreat servomotor. . 13 to 15 are molding process diagrams, and there are 15 processes from process A to process O. FIG. 16 shows time sharing when the wire spring shown in FIG. 11 is formed.

  First, the wire 1 is fed by the length of the portion a by driving the servo motor M22 for driving the pressure roller. Then, as shown in step A, the bending tool T5 moves forward by the operation of the servomotor M110 for bending and reversing the bending tool T5 and the servomotor M121 for rotating the bending tool T5, that is, the servomotors M5 and M10, and the cored bar. When the bending portion b is formed by engaging the groove 123a of the wire 123 with the wire 1 and rotating the rotating body 124, the bending tool T5 moves backward.

  Next, as in step B, the bending position of the bending tool T5 is stopped at a position away from the wire 1, and the wire 1 is rotated 30 ° (+ 30 °) counterclockwise by driving the revolution servo motor M30. Stop. During this time, the wire rod 1 is fed by the length of the portion c by driving the servo motor M22 for driving the pressure roller.

  Next, as shown in step C, the bending tool T5 is moved to the above-described retracted position by driving the servo motor M110 for advancing / retreating the bending tool T5 and the servomotor M121 for rotating the bending tool T5, that is, by the operation of the servo motors M5 and M10. When the bent portion d is formed by moving again from the above and the groove 123a of the core metal 123 is engaged with the wire 1 and the rotating body 124 is rotated, the bending tool T5 moves backward.

  Next, as in step D, the bending tool T5 stops at a position away from the wire 1, and the wire 1 is rotated 90 ° (+ 90 °) counterclockwise by driving the revolving servo motor M30, during which pressure is fed. By driving the roller driving servomotor M22, the wire 1 is fed out by the length of the portion e.

  Next, as shown in step E, the bending tool T5 is moved to the above-described retracted position by driving the servo motor M110 for advancing / retracting the bending tool T5 and the servomotor M121 for rotating the bending tool T5, that is, by operating the servo motors M5 and M10. When the bent portion f is formed by the forward movement of the wire 123, the groove 123a of the metal core 123 is engaged with the wire 1 and the rotating body 124 is rotated, the bending tool T5 moves backward.

  Next, as in step F, at the position where the bending tool T5 moves away from the wire 1, the wire 1 is rotated 90 ° (−90 °) in the clockwise direction by driving the revolution servo motor M30 and stopped. During this time, the slide table 52 slide servo motor M50, that is, the quill advance / retreat servo motor M11 is driven to move the quill 10 back to the position corresponding to the coil diameter to be formed, and the pressure roller driving servo motor M22 By driving, the wire 1 is sent out by the length of the portion g.

  Next, as shown in step G, the coil forming tool T1 is advanced to a predetermined position by driving the coil forming tool T1 advance / retreat servo motor M110, that is, the servo motor M1 is actuated, and the feeding of the wire 1 is started. As shown in Step H, the wire rod 1 is continuously fed by the required number of turns of the coil portion h by driving the servo motor M22 for driving the pressure roller.

  In addition, between the processes G, H, and I, the tool rotating unit 131 (tool holder 132) is rotated by a small amount by driving the servo motor M132 for rotating the coil forming tool T1, that is, the operation of the servo motor M9. By slightly shifting the tool main body (the wire engaging groove 136a) in the groove width direction with respect to the wire 1, the coil portion h is formed while adjusting the initial tension of the coil to be formed. And when shaping | molding of the coil part h by the coil shaping tool T1 is complete | finished, the coil shaping tool T1 will retreat.

  Next, as in step J, the retracted position of the coil forming tool T1 is a position away from the wire 1, and the wire 1 is rotated 90 ° (−90 °) clockwise by driving the revolution servo motor M30 and stopped. During this time, the quill 10 advances and returns to the original position by driving the slide table 52 slide servo motor M50, that is, the quill advance / retreat servo motor M11, and the wire rod 1 is driven by the pressure feed roller drive servo motor M22. Only the length of the part i is sent out.

Next, as in step K, the core metal 123 of the bending tool T5 is driven by driving the servo motor M110 for advancing and retreating the bending tool T5 and the servomotor M121 for rotating the bending tool T5, that is, the servo motors M5 and M10. When the bending portion j is formed by the groove 123a engaging with the wire 1 and the rotating body 124 rotating, the bending tool T5 moves backward. Next, as shown in step L, the bending tool T5 moves backward. At a position away from the wire 1, the wire 1 is rotated 135 ° (+ 135 °) counterclockwise and stopped by driving the revolution servo motor M 30. During this time, the wire 1 is fed by the length of the portion k by driving the servo motor M22 for driving the pressure roller.

  Next, as shown in step M, the slide table 52 sliding servo motor M50, that is, the quill advance / retreat servo motor M11 is driven to adjust the position of the quill 10 in the axis X1 direction, and then the coil forming tool T4 is moved forward and backward. When the servo motor M110 is driven, that is, the servo motor M4 is actuated, the coil forming tool T4 moves forward and comes into contact with the wire 1 and by the drive of the pressure roller driving servo motor M22, the feeding of the wire 1 is continued. When l is formed, the feeding of the wire 1 is stopped and the coil forming tool T4 moves backward.

  Next, as shown in Step N, the wire rod 1 is fed out by the length of the portion m by driving the servo motor M22 for driving the pressure roller at a position where the retracted position of the coil forming tool T4 is away from the wire rod 1. Then, the bending tool T2 is advanced by the operation of the servo motor M121 for advancing and retracting the bending tool T2 and the servomotor M121 for rotating the bending tool T2, that is, the servo motors M2 and M10, and the groove 123a of the core metal 123 is formed into the wire rod. When the bent part n is formed by the rotation of the rotating body 124, the bending tool T2 moves backward.

  Next, as in step O, the wire rod 1 is fed out by the length of the portion o by driving the servo motor M22 for driving the pressure roller, and driving the servo motor M110 for advancing / retreating the cutting tool T3, that is, the operation of the servo motor M3. Thus, when the cutting tool T3 advances and the wire 1 is cut, the cutting tool T3 moves backward, and the wire spring formed into the shape of FIG. 11 falls.

  Finally, the wire rod 1 is rotated 30 ° (−30 °) clockwise by driving the revolution servo motor M30, the twist applied to the wire rod 1 is restored, and the state of the wire rod 1 before forming (origin) is set.

  In the embodiment described above, the coil forming tool T1 is used exclusively for the left-handed winding and the coil-forming tool T4 is used exclusively for the right-handed winding without switching the tool body in the coil-forming tools T1 and T4. By driving the servo motor M132 and switching between the left-handed tool body 134A and the right-handed tool body 134B, only one of the coil forming tools T1 and T2 may be used.

  As shown in FIG. 17, the multi-axis numerical control apparatus 200 includes a control unit 202, a display unit 204, an operation unit 206, and drivers 208 to 228. The control unit 202 includes the display unit 204, the operation unit 206, and The drivers 208 to 228 are connected.

  The control unit 202 is configured by, for example, a microcomputer including a CPU, a program memory, a RAM, an input / output interface, the display unit 202 is configured by, for example, a liquid crystal display device, and the operation unit 204 is configured with various operation buttons, Consists of a mouse.

  The control unit 202 performs various calculations based on the operation information input from the operation unit 206 and the program stored in the program memory, and outputs pulse signals (set pulse train signals) according to the calculation results to the drivers 208 to 208. In addition to outputting to 228, the display unit 204 is configured to display operation information, information on measurement of wire springs, and the like.

  For example, as shown in FIG. 18, the drivers 208 to 228 include an encoder 300 that detects the number of rotations of each servo motor M22, M30, M40, and M110, a feedback pulse based on an output of the encoder 300, and a pulse from the control unit 202. Deviation counter 302 for calculating a deviation from the signal (pulse train), digital-analog converter 304 for converting the output pulse of deviation counter 302 into a DC analog voltage, and DC analog voltage output from digital-analog converter 304 at a speed As a command, a servo amplifier 306 that rotationally drives each servo motor is provided.

  Of the drivers 208 to 228, the drivers 208 to 222 are provided corresponding to the servo motors M110 for driving the eight molding tools 120A to 120H, respectively, and each servo motor is used when processing the wire and measuring the wire spring. Only when M110 drives the forming tools 120A to 120H, it is used as a driver to be driven. On the other hand, the drivers 224, 226, and 228 are provided corresponding to the revolution servo motor M30, the quill rotation servo motor M40, and the wire feed servo motor M22, and are always used as drivers to be driven when processing the wire. However, when measuring the wire spring, it is excluded from the driver to be driven.

  That is, the control unit 202 selects, for example, the driver 208, the drivers 224, 226, and 228 as drivers used during molding from the drivers 208 to 228, and selects, for example, the driver 212 as a driver used during measurement. The control means is configured to control the driving of the selected driver.

  A pulse signal corresponding to each servo motor is input from the control unit 202 to the driver to be driven at the time of processing the wire. When this pulse signal is input to the deviation counter 302 of the driver, the deviation counter 302 integrates the pulses of the pulse signal (pulse train) from the control unit 202 and the integrated value (accumulated pulse) is input to the digital-analog converter 304. Output. The digital-analog converter 304 outputs a DC analog voltage corresponding to the integrated value (accumulated pulse) to the servo amplifier 306 as a speed command. The servo amplifier 306 rotationally drives the servo motors (M110, M22, M30, M40) according to the speed command.

  When the servo motors (M110, M22, M30, M40) are rotationally driven, feedback pulses proportional to the rotation speed of the servo motors (M110, M22, M30, M40) are fed back from the encoder 300 to the deviation counter 302. The deviation counter 302 subtracts the feedback pulse from the integrated value (accumulated pulse) and outputs the subtraction result to the digital-analog converter 304.

  At this time, the accumulated value (accumulated pulse) of the deviation counter 302 is held at a certain accumulated value (accumulated pulse), and the servo motors (M110, M22, M30, M40) are based on the accumulated accumulated value (accumulated pulse). ) Is continued.

  On the other hand, when the number of pulse trains by the output of the control unit 202 reaches the set number and the control unit 202 stops outputting the pulse signal, the integrated value (accumulated pulse) of the deviation counter 302 is calculated every time a feedback pulse is input from the encoder 300. Decrease. As a result, the speed command by the output of the digital-analog converter 304 is delayed and the rotation speed of the servo motors (M110, M22, M30, M40) is reduced. When the integrated value (accumulated pulse) of the deviation counter 302 becomes 0, the driving of the servo motors (M110, M22, M30, M40) is stopped.

  Next, when the processing of the wire spring is completed, measurement of the wire spring is started. At this time, as shown in FIG. 19, in addition to the forming tool 120, the measurement tool 150 is mounted in advance on the measurement tool slide table 112 of the tool slide table (conveying means) 112. When starting the measurement of the wire spring 1A, first, when the operator operates the operation unit 206, operation information such as a measurement range and tolerance regarding the measurement tool 150 to be measured is set and set corresponding to the pulse train. The operation information is input to the control unit 202.

  Thereafter, the control unit 202 selects, for example, the conductive measurement tool 150C fixed to the molding tool 120C via the insulating block 152 as the measurement tool 150 for energizing the wire spring based on the operation information. A pulse signal is output to the driver 212 corresponding to the measurement tool 150C, and measurement of the movement amount of the measurement tool 150C is started.

  When this pulse signal is input to the driver 212, the servo motor M110 rotates in accordance with the driving of the driver 212. When the servo motor M110 rotates, the tool slide table 112 moves in the direction of the wire spring 1A along with the rotation of the servo motor M110. At this time, the forming tool 120C and the measurement tool 150C connected to the tool slide table 112 also move in the direction of the wire spring 1A.

  When the tip (pole tip) of the measurement tool 150C comes into contact with the wire spring 1A along with the movement of the measurement tool 150C, the measurement tool 150C is grounded via the conductive wire spring 1A. As a result, the control unit 202 determines that the measurement tool 150C is in contact with the wire spring 1A to form an energization loop, that is, the measurement tool 150C detects the wire spring 1A. The measurement of the amount of movement is terminated, the quality of the wire spring is determined based on the measurement result, and the determination result is displayed on the screen on the display unit 204.

  That is, the control unit 202 measures a pulse train from the start of the measurement of the movement amount of the measurement tool 150C to the end of the measurement of the measurement tool 150C, and corresponds to the measurement result and the measurement range and tolerance regarding the measurement tool 150C. Compare with the pulse train. At this time, when the pulse train indicating the measurement result is within the measurement range of the measurement tool 150C and within the tolerance range, the control unit 202 determines that the wire spring is a non-defective product, and otherwise, the wire spring is a defective product. Is determined.

  For example, as shown in FIG. 20, when the tolerance range (non-defective product range) is set from +1.00 to -1.00, the amount of movement until the measurement tool 150C contacts the wire spring 1A is tolerance. If the wire spring 1A is determined to be non-defective within the range of (non-defective), on the other hand, the amount of movement until the measuring tool 150C contacts the line spring 1A is out of the tolerance range (non-defective). The wire spring 1A is determined as a defective product.

  As the measurement tool 150, measurement tools 150A to 150H can be provided corresponding to the molding tools 120A to 120H.

  Next, the action at the time of processing and measurement of the wire spring will be described with reference to the flowchart of FIG.

  First, a program showing a processing procedure at the time of processing the wire spring 1A is created, a program showing a processing procedure at the time of measurement of the wire spring 1A is created, and the measurement tool 150 (specified measurement tool among 150A to 150H) ) Is set in association with the pulse train, the created program is stored in the program memory, and the set operation information is stored in the RAM (S1).

  Next, at the time of processing the wire spring 1A, the control unit 202 selects a processing mode, and, for example, a driver 208, drivers 224, 226, and 228 are driven as drivers to be driven based on a program at the time of processing the wire spring 1A. A pulse signal is output to the selected driver 208 and drivers 224 to 228. As a result, the servo motors M22, M30, M40, and M110 are driven, the wire 1 is conveyed to the forming stage 100, and the wire 1 is formed as the wire spring 1A by the forming tool 120 (S2).

  Thereafter, when the forming of the wire spring 1A is completed, the control unit 202 switches the mode from the machining mode to the measurement mode (S3), designates, for example, the servo motor M110 as the servo motor in the measurement mode, and designates the designated servo. The motor M110 is driven to measure the wire spring 1A, and the quality of the wire spring 1A is determined from this measurement result (S4).

  Here, when determining that the wire spring 1A is a non-defective product from the measurement result, the control unit 202 continues the post-process (S5), returns to the process of step S2, and determines the wire spring 1A as a defective product from the measurement result. When done, the processing for the wire spring 1A is finished (S6).

Next, the control unit 202 determines that the wire spring 1A is a defective product from the measurement result, and after finishing the processing for the wire spring 1A, the control motor 202 uses the servo motors M22, M30, M40, and M110 used for processing the wire spring 1A. Feedback control for correcting information related to driving is performed (S7). After performing feedback control for correcting the information related to the drive of the servo motors M22, M30, M40, and M110 used for processing the wire spring 1A, the control unit 202 returns to the process of step S2 and executes the corrected program. Based on this, the processing of the wire spring 1A is started, and the processes of steps S3 to S7 are repeated.
In the present embodiment, the tool slide table (measurement tool slide table) 112 is equipped with a measuring tool 150 for energizing the wire spring 1A in addition to the forming tool 120. Therefore, the forming tool 120A is used. After the wire spring 1A is formed, the controller 202 controls the amount of movement of the measurement tool 150C by driving the servo motor M110 (drive means) corresponding to the measurement tool 150C used for measurement of the formed wire spring 1A. The measurement of the moving amount of the measurement tool 150C is completed on the condition that the measurement is started and the energization loop is formed by the measurement tool 150C coming into contact with the wire spring 1A, and the quality of the line spring 1A is determined from the measurement result. Is done.

  According to the present embodiment, the servo motor M110 for driving the molding tool 120A can be applied to the servo motor for driving the measurement tool 150C, and the configuration can be simplified.

  Moreover, according to the present Example, the quality of the shape | molded wire spring 1A can be determined.

  In the present embodiment, as a method for the measurement tool 150C to detect the wire spring 1A, the measurement tool 150C is in contact with the wire spring 1A, and an energization loop is formed. When detecting the spring 1A, it is also possible to employ a method in which a laser sensor or an optical sensor is provided in the measurement tool 150C, and the wire spring 1A is detected without contact based on signals from these sensors.

  In the present embodiment, the quills, revolving means, and the like are described. However, the present invention is not limited to these.

  For example, it is possible to employ a configuration in which one molding tool and one measurement tool are provided, and the molding tool and the measurement tool are arranged on the same tool slide table (conveying means).

1 is an overall front view of a first embodiment of a wire spring forming apparatus according to the present invention. It is a left view of the same apparatus which shows a part in cross section. It is a horizontal sectional view around a rotating frame. It is an expanded sectional view around a quill. It is a front view of a bending tool. It is a longitudinal cross-sectional view (cross-sectional view in alignment with line VI-VI shown in FIG. 5) of a bending tool. It is a principal part perspective view of a bending tool. It is a top view of a coil forming tool. It is a longitudinal cross-sectional view (cross-sectional view in alignment with line IX-IX shown in FIG. 8) of a coil forming tool. It is a figure which shows arrangement | positioning of the coil formation tool main body for the right hand and the left hand in a tool holder. It is a perspective view which shows an example of the wire spring shape | molded with the same apparatus. It is an arrangement view of various forming tools in a forming stage. 12 shows a step of forming the wire spring shown in FIG. It is a figure which shows the process of shape | molding the wire spring shown in FIG. It is a figure which shows the process of shape | molding the wire spring shown in FIG. It is a figure which shows the time sharing of the process of shape | molding the wire spring shown in FIG. It is a block block diagram of a multi-axis numerical control apparatus. It is a block block diagram of a driver. It is sectional drawing of a shaping | molding tool and a measurement tool. It is a schematic diagram for demonstrating the method to determine the quality of a wire spring. It is a flowchart for demonstrating the effect | action at the time of the process of a wire spring, and a measurement.

DESCRIPTION OF SYMBOLS 1 Wire rod X1 Wire rod axis 2 Mounting frame 3 Fixed frame 4 Slide unit 10 Quill which is a wire rod guide 20 Wire rod feeding means 21 Rotating frame 21a Rotating frame disk portion 22 Pressure feeding roller M22 Pressure feeding roller driving servo motor 30 Revolution means 33 Revolution means Ring motor M30 Servo motor for revolving 40 Quill rotating means M40 Servo motor for driving quill rotation 50 Linear way slide as quill moving means 52 Linear way slide table M50 Linear way slide driving (for quill advance / retreat) servo motor DESCRIPTION OF SYMBOLS 100 Molding stage 102 Main plate 104 Ring gear which comprises the rotational drive mechanism of a bending molding tool 106 The hole for gear type power transmission mechanism arrangement | positioning 110 Linear slide M110 The tool for advancing and retreating a molding tool Bomotor (first servo motor)
112 Tool slide table 114 Crank mechanism for transmitting the drive of the first servo motor to the tool slide table T (120) Forming tool T5 (120A), T2 (120B) Bending tool T1 (120C), T4 (120D) Coil forming Tool T3 (120E) cutting and forming tool M121 Servo motor for bending tool rotation (second servo motor)
123 Fixed metal core constituting the bending forming rotation unit 123a Groove for wire rod engagement provided on the front end face of the core metal 124 Rotor constituting the bending shaping rotation unit 124a Protrusion for hooking the wire rod provided on the front end face of the rotation body 125 Drive shaft 126 Spline shaft on the side of the bending forming rotary unit that is the driven shaft 127 Vertical rotating shaft 126a Rotating cylinder that is the driving shaft 129 Gear type power transmission mechanism that transmits the rotational force of the ring gear to the rotating body of the bending tool 129a Gear type power transmission mechanism Serration engaging part 132 Tool holder which is a rotating body for mounting a coil forming tool body M132 Servo motor for rotating a coil forming tool holder (for switching between left-handed winding and right-handed winding and for adjusting initial tension) (third servomotor) )
134A Left-handed tool main body 134B Right-handed tool main body 150 (150A to 150H) Measuring tool 202 Control unit 204 Display unit 206 Operation unit 208 to 228 Driver 300 Encoder 302 Deviation counter 306 Servo amplifier

Claims (3)

Wire rod feeding means for feeding the wire rod to the forming stage;
Conveying means arranged to move forward and backward with respect to the molding stage;
A molding tool that is transported by the transport means and forms the wire as a wire spring at the molding stage;
A measurement tool that is transported by a transport means that carries the forming tool and that measures the wire spring based on the measurement of the amount of movement;
Driving means for advancing and retracting the conveying means;
Control means for controlling the drive of the drive means,
The control unit controls driving of the driving unit according to molding by the molding tool during molding of the wire, and controls driving of the driving unit according to measurement by the measuring tool during measurement of the wire spring. A wire spring forming apparatus. Wire rod feeding means for feeding the wire rod to the forming stage;
A plurality of conveying means arranged to move forward and backward with respect to the molding stage;
A molding tool that is transported by each of the transport means and forms the wire as a wire spring at the molding stage;
A measurement tool that is transported by any of a plurality of transport means that carries the forming tool, and that measures the wire spring based on the measurement of the amount of movement;
A plurality of driving means for driving the respective conveying means forward and backward, and
A wire spring forming apparatus comprising a control means for selecting a drive means used when forming the wire rod or a drive means used when measuring the wire spring from among the plurality of drive means, and controlling the drive of the selected drive means. In the wire spring forming device according to claim 1 or 2,
The control means starts measuring the amount of movement of the measurement tool as the drive means is driven during measurement of the wire spring, and detects that the measurement tool has approached the wire spring and has detected the wire spring. The wire spring forming apparatus is characterized in that the measurement of the amount of movement of the measurement tool is terminated, and the quality of the wire spring is determined from the measurement result.

Images