JP2008126289A - Wire-rod forming machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire-rod forming machine having rigidity higher than that of a conventional wire-rod forming machine. <P>SOLUTION: A wire-rod forming machine 10 has a wire-rod feeding device 12, a cutting-tool drive mechanism 50, and a forming-tool drive mechanism 20 held together on a base frame 11, which is composed by integrally fixing a base plate 11A, uprising walls 11B, 11B standing from the base plate 11A, and a ceiling wall 11C opposed to the base plate 11A from above sandwiching the uprising walls 11B, 11B. Further, since both of the upper and lower edges of the forming-tool drive mechanism 20 are held at the ceiling wall 11C and the base plate 11A, the rigidity between the wire-rod feeding device 12 and the forming-tool drive mechanism 20 is made higher than that between the wire-rod feeding device and the forming-tool drive mechanism of the conventional wire-rod forming machine. Thus, even when the diameter of a wire rod 90 is thicker, the coil spring is stably formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a wire rod feeding device for feeding a wire rod, a forming tool for molding a wire rod fed from the wire rod feeding device, and a cutting tool for cutting the wire rod fed from the wire rod feeding device. The present invention relates to a wire forming machine equipped with

As a conventional wire rod forming machine of this type, the one shown in FIG. 11 has a forming tool driving mechanism 2 attached to the front wall 1A of the wire rod feeding apparatus 1. The forming tool drive mechanism 2 includes a first base plate 4 that is slidable in a vertical direction with respect to a linear motion mechanism that is attached to the front wall 1A, and a wire feed direction orthogonal to the first base plate 4 A second base plate 5 slidably mounted in a horizontal direction, and a main body 6 mounted on the second base plate 5 so as to be slidable in a horizontal direction parallel to the feeding direction of the wire, A molding tool was attached to the tip of the main body 6.
Japanese Patent No. 3839338 (paragraphs [0018] to [0036], FIG. 1)

  However, in the above-described conventional wire rod forming machine, since the first base plate 4 is supported in a cantilever state, when the wire rod diameter increases and the load applied to the forming tool drive mechanism 2 increases, the wire rod feed Rigidity between the feeder 1 and the forming tool drive mechanism 2 could be a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wire rod forming machine capable of increasing rigidity compared to the conventional one.

  A wire rod forming machine according to the first aspect of the invention made to achieve the above object is a wire rod feeding guide for feeding a wire rod in a horizontal direction and for restricting the movement of the wire rod to the side by inserting the wire rod. A wire feeding device having a wire, a forming tool for forming a wire by being abutted against the wire fed from the wire feeding device, and a molding tool attached thereto, for positioning control of the forming tool A forming tool driving mechanism, a cutting tool for cutting a wire fed from a wire feeding device, a cutting tool driving mechanism for attaching the cutting tool and driving the cutting tool, a wire feeding device, and a forming tool In a wire rod forming machine including a drive mechanism and a base frame for holding a cutting tool drive mechanism, the base frame includes a base plate, a standing wall standing up from the base plate, A ceiling plate facing the base plate from above is fixed integrally with the base plate across the wall. The wire feeding device is held by the standing wall, and the cutting tool drive mechanism is held by the standing wall and the wire feeding. The cutting tool is configured to advance and retreat from the side to the front area of the apparatus, and the forming tool drive mechanism is disposed in front of the wire feeding direction with respect to the wire feeding apparatus, and both upper and lower ends thereof are the base plate. It is characterized by being held on the ceiling wall.

  According to a second aspect of the present invention, in the wire rod forming machine according to the first aspect, the forming tool driving mechanism includes a first movable base that can be positioned and controlled at an arbitrary position in the first linear motion direction facing the horizontal direction. The molding tool can be linearly moved in the first linear movement direction, and the upper and lower ends of the first movable base are connected to the base plate and the ceiling wall so as to be linearly movable in the first linear movement direction. The first linear motion guide is characterized.

  According to a third aspect of the present invention, in the wire rod forming machine according to the second aspect, the molding tool drive mechanism can be controlled to be positioned at an arbitrary position in the second linear motion direction orthogonal to the first linear motion direction. The molding tool is linearly movable in the second linear movement direction, and the first movable base is provided with a pair of first opposed support portions opposed to each other with the second movable base interposed therebetween. It is characterized in that it includes a second linear motion guide in which the second movable base is connected to both the pair of first opposing support portions so as to be linearly movable in the linear motion direction.

  According to a fourth aspect of the present invention, in the wire rod forming machine according to the first aspect, the molding tool drive mechanism includes a first movable base that can be positioned and controlled at an arbitrary position in the first linear motion direction facing the horizontal direction, A second movable base that can be positioned and controlled at an arbitrary position in the second linear motion direction orthogonal to the first linear motion direction, and a third linear motion direction orthogonal to the first linear motion direction and the second linear motion direction, respectively. A third movable base that can be positioned and controlled at an arbitrary position, and enables the molding tool to move linearly in the first, second, and third linear motion directions, and the first movable base in the first linear motion direction. A pair of first linear motion guides, which are connected to the base plate and the ceiling wall so as to be linearly movable, and a pair of opposing surfaces formed on the first movable base and sandwiching the second movable base therebetween The first opposing support portion and the second pair of first movable pairs in the second linear motion direction A second linear motion guide coupled to both of the support portions so as to be linearly movable; a pair of second opposing support portions formed on the second movable base and facing each other with the third movable base interposed therebetween; It has a feature in that it includes a third linear motion guide in which the third movable base is connected to both of the pair of second opposing support portions so as to be linearly movable in three linear motion directions.

  According to a fifth aspect of the present invention, in the wire rod forming machine according to any one of the first to fourth aspects, the forming tool drive mechanism includes a rotary head that is rotationally driven around a first rotation axis parallel to the wire feed direction. And a head support protrusion that protrudes from the outer edge of the rotary head that is offset from the first rotation axis toward the wire feeding device, and is rotatably attached to the head support protrusion and is orthogonal to the first rotation axis It is characterized in that it is provided with a fixed table that is driven to rotate about the second rotating shaft and on which the molding tool is fixed.

  The invention of claim 6 is characterized in that, in the wire rod forming machine according to claims 1 to 5, a protective wall is provided against which the wire rod is abutted when the wire rod passes through the forming tool.

  The invention of claim 7 is characterized in that, in the wire rod forming machine according to claim 6, a protective wall is formed by a part of the forming tool drive mechanism.

  In the wire rod forming machine, the wire rod fed from the wire rod feeding device collides with the molding tool positioned at a predetermined position by the molding tool driving mechanism and is plastically deformed to be molded into a predetermined shape. When the forming is completed, the cutting tool enters the front region of the wire feeding device from the side by the cutting tool driving mechanism, and cuts the proximal end portion of the wire. Here, when the diameter of the wire is increased, the load applied to the forming tool driving mechanism at the time of forming increases, so that high rigidity is required between the wire feeding device and the forming tool driving mechanism. On the other hand, according to the present invention, the wire feeding device and the base frame formed by integrally fixing the base plate, the standing wall rising from the base plate, and the ceiling wall facing the base plate from above with the standing wall interposed therebetween. Since the cutting tool driving mechanism and the forming tool driving mechanism are held, and the upper and lower ends of the forming tool driving mechanism are held by the base plate and the ceiling wall, the cutting tool driving mechanism and the forming tool driving mechanism are arranged between the wire feeding device and the forming tool driving mechanism. Rigidity is increased compared to the conventional one. Therefore, even if the diameter of the wire is increased, it can be stably formed.

  Here, the “base plate” of the present invention includes a ground or a floor surface, and a “base” installed on the ground or the floor surface.

  According to the second aspect of the present invention, the molding tool can be moved together with the first movable base in the first linear movement direction facing the horizontal direction to be positioned at an arbitrary position. Here, since the upper and lower ends of the first movable base are connected to the base plate and the ceiling wall so as to be able to move directly, the first movable base and the base frame can be compared with the case where only one of the ends is connected. The rigidity between can be increased.

  According to the invention of claim 3, the molding tool can be moved together with the second movable base in the second linear movement direction orthogonal to the first linear movement direction, and can be positioned at an arbitrary position. Here, since the second movable base is connected to both of the pair of first opposed support portions opposed to each other with the second movable base interposed therebetween, the first opposed support portion. The rigidity between the first movable base and the second movable base can be increased as compared with the case where only one of them is connected.

  According to the invention of claim 4, the molding tool is divided into three directions orthogonal to each other, that is, a first linear motion direction facing the horizontal direction, a second linear motion direction orthogonal to the first linear motion direction, and a first It can be positioned at an arbitrary position by linearly moving in a third linear direction orthogonal to the linear direction and the second linear direction. Here, the upper and lower ends of the first movable base are connected to the base plate and the ceiling wall so as to be able to move directly, and the second movable base is opposed to the first movable base with the second movable base interposed therebetween. The third movable base is coupled to both of the pair of first opposing support portions so that the third movable base is directly movable to both of the pair of second opposing support portions opposed to each other across the third movable base. It is linked movably. Thereby, the rigidity between the base frame and the first movable base and between the first to third movable bases is increased, and the rigidity of the forming tool drive mechanism itself can be increased.

  According to the invention of claim 5, the fixed table to which the forming tool is fixed is rotated around the first rotation axis parallel to the wire feeding direction and around the second rotation axis perpendicular to the first rotation axis. Can be made. Thereby, the position and attitude | position of a shaping | molding tool can be changed.

  According to the invention of claim 6, even if the wire rod passes through the forming tool, it can be received by the protective wall.

  According to the invention of claim 7, it is not necessary to provide a protective wall separately.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, in the wire rod forming machine 10, the forming tool driving mechanism 20 and the wire rod feeding device 12 face each other in the horizontal direction, and as shown in FIG. 2, the molding tool driving mechanism 20 and the wire rod feeding device 12 In between, the cutting tool drive mechanism 50 is arrange | positioned. The forming tool driving mechanism 20, the wire rod feeding device 12, and the cutting tool driving mechanism 50 are held by a common base frame 11.

  The base frame 11 includes a base plate 11A fixed to the ground surface or a floor surface, and a pair of upright walls standing vertically from the base plate 11A and arranged in a horizontal direction in which the forming tool driving mechanism 20 and the wire rod feeding device 12 face each other. 11B, 11B and a ceiling wall 11C opposed to the base plate 11A from above with the pair of upright walls 11B, 11B interposed therebetween are integrally fixed.

  As shown in FIG. 3, the wire rod feeding device 12 is held by a pair of standing walls 11 </ b> B and 11 </ b> B in the base frame 11. The wire rod feeding device 12 is provided with three pairs of feed rollers 13 and 13 which are paired side by side in the vertical direction. The wire rod 90 is sandwiched between the pair of feed rollers 13 and 13 and the upper and lower feed rollers 13 and 13 are rotated symmetrically so that the wire rod 90 is fed to the forming tool drive mechanism 20 side or vice versa. Can be pulled back to. Further, each feed roller 13 is driven by a separate servo motor 16, whereby the feed amount of the wire 90 can be controlled.

  As shown in FIG. 1, a quill 14 (corresponding to the “wire feed guide” of the present invention) is formed on the front surface of the standing wall 11B on the side close to the forming tool drive mechanism 20 among the pair of standing walls 11B and 11B. ) Is fixed. For example, a wire insertion hole having a circular cross section corresponding to the cross-sectional shape of the wire 90 is formed through the quill 14. The wire rod 90 fed through the upright wall 11B by the wire rod feeding device 12 is fed to the forming tool drive mechanism 20 side through the wire rod insertion hole. The quill 14 restricts the lateral movement of the wire 90.

  As shown in FIG. 4, the cutting tool driving mechanism 50 is attached to a side position of the quill 14 on the front surface of the standing wall 11 </ b> B facing the forming tool driving mechanism 20. A cutting tool 54 is provided at a front end portion of the cutting tool drive mechanism 50 facing the quill 14 side, and the cutting tool 54 is reciprocated in the vertical direction by a first linear motion portion 51 provided between the standing wall 11B. Drive. The first linear motion portion 51 includes a ball screw mechanism 52 and a slider mechanism 53, and one end of a ball screw 52B of the ball screw mechanism 52 is connected to the servo motor 51M1. When the servo motor 51M1 rotates the ball screw 52B, the cutting tool 54 is moved in the vertical direction by being guided by the slider mechanism 53.

  Although not shown, the cutting tool drive mechanism 50 includes a ball screw mechanism similar to the first linear motion portion 51 described above and a second linear motion portion having a structure in which a slider mechanism is extended in the horizontal direction. A servo motor 51M2 is connected to one end of the ball screw. When the servo motor 51M2 rotates the ball screw, the cutting tool 54 is guided by the slider mechanism to move in the horizontal direction, and advances and retracts from the side with respect to the molding region R in front of the quill 14.

  The cutting tool drive mechanism 50 retracts the cutting tool 54 to the side of the molding region R while the wire rod 90 is being molded by the below-described molding tools T1 to T3 shown in FIG. Then, the cutting tool 54 is moved into the molding region R instead of the molding tools T1 to T3. Then, the cutting tool 54 is actuated by the tool drive servomotor 55, and the proximal end portion of the wire 90 discharged to the forming region R is cut.

  Next, the molding tool drive mechanism 20 will be described in detail with reference to FIGS. As shown in FIG. 6, a housing 11 </ b> H that is sandwiched between the base plate 11 </ b> A and the ceiling wall 11 </ b> C and is integrally fixed is provided in front of the base frame 11 in the wire feeding direction. The housing 11H has a portal structure penetrating in the wire feeding direction. The molding tool drive mechanism 20 is housed inside the housing 11H, and both upper and lower ends are connected to the ceiling wall 11C of the base frame 11 and the base plate 11A via the top plate of the housing 11H so as to be directly movable. ing.

  The forming tool drive mechanism 20 includes a first movable base 40 having a rectangular tube structure penetrating in the wire feeding direction, and a rectangular tube structure is formed in the inner space of the first movable base 40 in the same manner as the first movable base 40. A second movable base 41 is provided, and a third movable base 42 holding the molding tools T1 to T3 is provided in the inner space of the second movable base 41. The first linear motion guide provided between the base plate 11A and the housing 11H and the first movable base 40, and the second linear motion guide provided between the first movable base 40 and the second movable base 41. And the third linear motion guide provided between the second movable base 41 and the third movable base 42, the molding tools T1 to T3 provided on the third movable base 42 are directly moved in three directions orthogonal to each other. It is configured to move.

  The specific configuration of the first linear motion guide is as follows. That is, as shown in FIGS. 5 and 6, on the upper surface of the base plate 11A and the top plate lower surface of the housing 11H, a horizontal direction perpendicular to the feeding direction of the wire 90 (direction perpendicular to the paper surface in FIG. A pair of rails 22S1 and 22S1 extending in parallel in the left-right direction are provided, and the upper wall 40A and the lower wall 40B facing the top and bottom of the first movable base 40 are directly connected to the rails 22S1 and 22S1. Sliders 22S2 and 22S2 that are movably engaged are provided. Further, a ball screw 22B1 extending in parallel with the rail 22S1 is rotatably supported on the base plate 11A, and a ball nut 22B2 screwed to the ball screw 22B1 is supported on a support wall 40C hanging from the lower surface of the first movable base 40. It is fixed.

  Further, a first linear motion shaft servomotor 22M, which is a drive source for the first linear motion guide, is attached to the base plate 11A, and one end portion of the ball screw 22B1 is connected to the output rotation shaft of the first linear motion shaft servomotor 22M. It is connected. Thus, the first linear motion guide is configured, and when the first linear motion shaft servomotor 22M rotates the ball screw 22B1, the first movable base 40 slides on the rails 22S1 and 22S1. That is, the first movable base 40 and the third movable base 42 reciprocate in a horizontal direction (hereinafter referred to as “first linear motion direction Z”) orthogonal to the feeding direction of the wire 90, and the first linear motion direction Z The molding tools T1 to T3 can be positioned at any position.

  The second linear motion guide provided between the first movable base 40 and the second movable base 41 has the same structure as the first linear motion guide. That is, as shown in FIG. 6, both side walls 40D and 40D (corresponding to “a pair of first opposing support portions” of the present invention) of the first movable base 40 that are horizontally opposed to each other are vertically arranged. A pair of extended rails 23S1 and 23S1 are provided, and sliders 23S2 and 23S2 engaged with the rails 23S1 and 23S1 so as to be linearly movable are provided on both sides of the second movable base 41. A ball screw 23B1 extending in parallel with the rail 23S1 is rotatably supported on one side wall 40D of the first movable base 40, and one side of the second movable base 41 is screwed into the ball screw 23B1. A ball nut 23B2 is provided.

  Further, the first movable base 40 is attached with a second linear motion shaft servomotor 23M as a drive source of the second linear motion guide, and one end of the ball screw 23B1 is connected to the output rotation shaft of the second linear motion shaft servomotor 23M. The parts are connected. Thus, the second linear motion guide is configured, and when the second linear motion shaft servomotor 23M rotates the ball screw 23B1, the second movable base 41 slides on the rails 23S1 and 23S1. That is, the second movable base 41 and the third movable base 42 reciprocate in the vertical direction (hereinafter referred to as “second linear motion direction Y”) perpendicular to the feeding direction of the wire 90, and the second linear motion direction. The molding tools T1 to T3 can be positioned at an arbitrary Y position.

  Here, the upper wall 41A of the second movable base 41 is connected to the tip portions of cylinder rods 61, 61 extending from a pair of linear cylinders 60, 60 (hydraulic cylinder, air cylinder, etc.). The linear cylinders 60, 60 and the second linear motion shaft servomotor 23M cooperate to move the second movable base 41 up and down.

  The specific configuration of the third linear motion guide is as follows. That is, in the second movable base 41, the upper and lower opposing walls 41A and 41B (corresponding to the “one pair of second opposing support portions” of the present invention) feed direction of the wire 90, respectively. Rails 21S1 and 21S1 extending in parallel to each other, and sliders 21S2 and 21S2 respectively provided on the upper wall and the lower wall of the third movable base 42 engage with the rails 21S1 and 21S1 so as to be linearly movable. ing.

  Further, as shown in FIG. 5, a ball screw extending in parallel with the rails 21S1 and 21S1 is provided between a pair of wall portions that stand up from the lower wall 41B of the second movable base 41 and face each other in the feeding direction of the wire rod 90. 21B1 is handed over and rotatably supported. The ball nut 21B2 is fixed to a support wall 42A (see FIG. 6) that hangs down from the third movable base 42, and the ball nut 21B2 and the ball screw 21B1 are screwed together. Further, a third linear motion shaft servomotor 21M, which is a drive source for the third linear motion guide, is attached to the second movable base 41, and one end of the ball screw 21B1 is attached to the output rotation shaft of the third linear motion shaft servomotor 21M. The parts are connected. Thus, the third linear motion guide is configured, and when the third linear motion shaft servomotor 21M rotates the ball screw 21B1, the third movable base 42 slides on the rails 21S1, 21S1. That is, the third movable base 42 reciprocates in the third linear motion direction X (left and right direction in FIG. 5) parallel to the feeding direction of the wire rod 90, and the molding tool is placed at an arbitrary position in the third linear motion direction X. T1-T3 can be positioned.

  A fixed table 30 for fixing the molding tools T1 to T3 is attached to the third movable base 42. The fixed table 30 is configured to be rotatable around a first rotation axis J1 and a second rotation axis J2 that are orthogonal to each other by a first rotation mechanism and a second rotation mechanism described below provided in the third movable base 42. ing.

  The specific configuration of the first rotation mechanism is as follows. That is, as shown in FIG. 7, on the third movable base 42, a cylindrical shaft 31S extending in the feeding direction of the wire 90 is rotatably supported by a bearing, and the end of the cylindrical shaft 31S on the quill 14 side is supported. The rotating head 32 that protrudes toward the quill 14 from the front wall 42 </ b> B facing the wire feeding device 12 is fixed. A first rotation drive servomotor 24M, which is a drive source of the first rotation mechanism, is attached to the rear surface of the third movable base 42 opposite to the quill 14, and the output rotation of the first rotation drive servomotor 24M is attached. The shaft and the cylindrical shaft 31S are connected via flat gears 24G1 and 24G2. These constitute a first rotation mechanism, and when the cylindrical shaft 31S is rotated by the first rotation drive servomotor 24M, the rotary head 32 rotates about the first rotation axis J1 parallel to the feeding direction of the wire 90. .

  The specific configuration of the second rotation mechanism is as follows. That is, as shown in FIG. 7, the inner shaft 33S is rotatably supported by a bearing inside the cylindrical shaft 31S. In addition, from the outer edge of the rotary head 32 that is offset outward from the first rotational axis J1 (shifted outward from the rotation center of the cylindrical shaft 31S), the swivel support base 34 (the “head” of the present invention is directed toward the quill 14). Corresponds to the “supporting protrusion”. The rotary head 32 includes a relay shaft 35 that rotates about an axis orthogonal to the first rotation axis J1, and the swing support base 34 has a swing shaft that rotates about an axis parallel to the relay shaft 35. 36 is provided.

  The inner shaft 33S and the relay shaft 35 are connected by a pair of bevel gears 33G1 and 35G1 inside the rotary head 32, and the relay shaft 35 and the turning shaft 36 are inside the turning support base 34. They are connected by flat gears 35G2 and 36G1.

  As shown in FIG. 7, on the rear surface side of the third movable base 42, a second rotation drive servomotor 25M, which is a drive source of the second rotation mechanism, is mounted coaxially with the inner shaft 33S, and the second rotation drive servo. The output rotation shaft of the motor 25M and one end of the inner shaft 33S are connected. Thus, the second rotation mechanism is configured, and when the second rotation drive servo motor 25M rotates the inner shaft 33S, the relay shaft 35 rotates in conjunction with the rotation head 32, and the swivel shaft 36 further rotates the first rotation axis J1. And rotate around a second rotation axis J2 perpendicular to the axis.

  The end of the swivel shaft 36 on the first rotation axis J1 (rotation center of the rotary head 32) side passes through the swivel support 34, and a fixed table 30 for fixing the forming tools T1 to T3 therein. Is fixed. As shown in FIG. 8, for example, the fixed table 30 has a substantially triangular planar shape, and different forming tools T <b> 1 to T <b> 3 are bolted to the respective corners.

  The wire rod forming machine 10 includes a control unit (not shown) that performs NC control of the servo motors 21M to 25M. When the control unit executes the NC program, the first to third linear motion guides and the first and second rotating mechanisms described above are driven, and the posture and position of the fixed table 30 are changed. Thereby, the forming tools T1 to T3 that collide with the wire rod 90 are sequentially switched, and, for example, a coil spring is manufactured.

  More specifically, a wire sliding contact groove Tz for guiding the wire 90 is formed on the tip surface of the forming tool T1 among the forming tools T1 to T3. The wire 90 is pressed against the inner surface of the wire sliding contact groove Tz of the forming tool T1 in a state where the tip is bent in advance by the forming tool T2, and in this state, the wire feeding device 12 feeds the wire 90, As shown in the change from FIG. 9A to FIG. 9B, the subsequent wire 90 is plastically deformed into an arc shape, and a coil spring is formed. When the molding by the molding tools T1 to T3 is completed, the third movable base 42 is retracted and the molding tools T1 to T3 are retracted from the molding region R, and instead, the cutting tool 54 enters the molding region R. Then, the proximal end of the wire 90 on the quill 14 side is cut by the cutting tool 54. Thereby, one coil spring is completed, and a plurality of coil springs can be continuously manufactured from the wire rod 90 by repeatedly executing this NC program.

  Here, even if the wire rod 90 fed from the wire rod feeding device 12 passes through without hitting the forming tools T1 to T3, the wire rod 90 abuts against the rotary head 32 provided behind the fixed table 30. Does not jump out of the wire rod forming machine 10. The outer shell wall constituting the outer surface of the rotary head 32 corresponds to the “protective wall” of the present invention.

  By the way, when the diameter of the wire 90 for forming the coil spring is increased, the load applied to the forming tool drive mechanism 20 during forming increases, so that the wire feed device 12 and the forming tool drive mechanism 20 are interposed between them. High rigidity is required. On the other hand, according to the present embodiment, the base plate 11A, the standing walls 11B and 11B that stand from the base plate 11A, and the ceiling wall 11C that faces the base plate 11A from above with the standing walls 11B and 11B sandwiched therebetween are integrally fixed. The base frame 11 holds the wire feeding device 12, the cutting tool drive mechanism 50, and the forming tool drive mechanism 20, and the forming tool drive mechanism 20 has upper and lower end portions on the base plate 11A and the ceiling wall 11C. Therefore, the rigidity between the wire feeding device 12 and the forming tool driving mechanism 20 is increased as compared with the conventional case. Thereby, even if the diameter of the wire 90 becomes thick, a coil spring can be shape | molded stably.

  Further, the upper and lower ends of the first movable base 40 are connected to the top plate of the housing 11H and the base plate 11A in the base frame 11 so as to be capable of direct movement, and the left and right sides of the second movable base 41 are the first movable base. 40, the upper and lower ends of the third movable base 42 are connected to the upper wall 41A and the lower wall 41B of the second movable base 41 so as to be capable of linear movement. The rigidity between the frame 11 and the first movable base 40, between the first movable base 40 and the second movable base 41, and between the second movable base 41 and the third movable base 42 is improved. That is, the rigidity of the molding tool drive mechanism 20 itself is improved, and the position control of the molding tools T1 to T3 in the first linear motion direction Z, the second linear motion direction Y, and the third linear motion direction X can be performed with high accuracy. The coil spring can be accurately formed.

  In the wire rod forming machine 10 of the present embodiment, the forming tool driving mechanism 20 is provided at a position facing the wire rod feeding device 12 across the quill 14 in the feeding direction of the wire rod 90, and the forming tools T1 to T1 are provided there. T3 is held. That is, the front surface of the standing wall 11B to which the quill 14 is attached does not require a space for attaching other members such as a molding slide for directly moving the molding tool. The wall body on the side where the tool driving mechanism 50 is not attached (the portion indicated by the two-dot chain line in FIG. 4) is cut off. Thereby, the operator can approach from the side in the wire feeding direction to the vicinity of the forming region R (see FIG. 2), and replaces the forming tools T1 to T3 and maintenance work of the forming tool drive mechanism 20. Etc. can be performed efficiently and safely.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above embodiment, the number of molding tools fixed to the fixed table is not limited to three, and one or a plurality of molding tools other than three may be fixed.

  (2) The inner shaft 33S and the relay shaft 35 are connected by bevel gears 33G1 and 35G1, but may be connected by a worm and a worm wheel, for example. The relay shaft 35 and the turning shaft 36 are connected by the spur gears 35G2 and 36G1, but may be connected by a pulley and a belt, for example.

  (3) The cutting tool 54 provided in the cutting tool drive mechanism 50 may have the following configuration. That is, when a pair of cutting blades are provided that are vertically displaced from each other in the feeding direction of the wire 90 and the upper cutting blade and the lower cutting blade overlap each other, the edges of both cutting blades The structure which cut | disconnects the wire 90 between parts may be sufficient.

  In addition, a fixed blade and a movable blade are provided, and the movable blade is passed relative to the inside of the fixed blade by rotating the movable blade relative to the fixed blade. The structure which cut | disconnects the wire 90 between may be sufficient.

  (4) In the above embodiment, the fixed table 30 is attached only to the end portion on the first rotation axis J1 side of the turning shaft. However, as shown in FIG. The sub-fixing table 30B may be attached. In this way, more molding tools can be held, and a molded product having a more complicated shape can be molded. In addition, since the rotary head 32 is positioned behind the fixed table 30, the empty space is narrow. However, the empty space is wide because the rotary head 32 is not positioned behind the sub fixed table 30B. . Therefore, on the sub fixed table 30B side, it is possible to mold a molded product (for example, a coil spring or a torsion spring) longer than the fixed table 30 side.

Side sectional view of the wire rod forming machine according to the first embodiment of the present invention. Plan view of wire rod forming machine Partial cross-sectional view of wire feeder Side view of wire rod cutting device Side sectional view of molding tool drive mechanism Rear view of molding tool drive mechanism Enlarged side sectional view of the third movable base Top view of fixed table Diagram showing the process of forming a coil spring The expanded sectional side view of the 3rd movable base which concerns on other embodiment (4). Side view of a conventional wire forming machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wire rod forming machine 11 Base frame 11A Base plate 11B Standing wall 11C Ceiling wall 12 Wire rod feeding device 14 Quill (wire rod feeding guide)
DESCRIPTION OF SYMBOLS 20 Molding tool drive mechanism 30 Fixed table 32 Rotating head 34 Turning support stand 40 1st movable base 42 3rd movable base 40A Upper wall 40D, 40D Side wall (a pair of 1st opposing support part)
41 2nd movable base 41A Upper wall (2nd opposing support part)
41B Lower wall (2nd opposing support part)
50 cutting tool drive mechanism 54 cutting tool 90 wire rod J1 first rotating shaft J2 second rotating shaft R forming region T1 to T3 forming tool

Claims (7)

A wire rod feeding device having a wire rod feeding guide that feeds the wire rod in the horizontal direction and that restricts the movement of the wire rod to the side through which the wire rod is inserted;
A molding tool for molding the wire by being abutted against the wire fed from the wire feeding device;
A molding tool driving mechanism for mounting the molding tool and controlling the positioning of the molding tool;
A cutting tool for cutting the wire fed from the wire feeding device;
A cutting tool driving mechanism for attaching the cutting tool and driving the cutting tool;
In a wire rod forming machine comprising a base frame for holding the wire rod feeding device, the forming tool driving mechanism, and the cutting tool driving mechanism,
The base frame is integrally provided with a base plate, a standing wall standing upright from the base plate, and a ceiling wall facing the base plate from above with the standing wall interposed therebetween,
The wire feeding device is held by the standing wall,
The cutting tool drive mechanism is configured to advance and retract the cutting tool from the side in a front region of the wire feeding device while being held by the standing wall.
The molding tool driving mechanism is disposed in front of the wire feeding device with respect to the wire feeding device, and upper and lower ends are held by the base plate and the ceiling wall. Machine.   The molding tool drive mechanism is provided with a first movable base that can be positioned and controlled at an arbitrary position in the first linear motion direction facing the horizontal direction so that the molding tool can be linearly moved in the first linear motion direction. In addition, a first linear motion guide is provided in which the upper and lower end portions of the first movable base are connected to the base plate and the ceiling wall so as to be linearly movable in the first linear motion direction. The wire rod forming machine according to claim 1. The molding tool drive mechanism is provided with a second movable base that can be positioned and controlled at an arbitrary position in the second linear motion direction orthogonal to the first linear motion direction, and the molding tool is directly moved in the second linear motion direction. Moveable,
The first movable base is provided with a pair of first opposed support portions opposed to each other with the second movable base interposed therebetween, and the second movable base is moved in the second linear motion direction to the first movable base. The wire rod forming machine according to claim 2, further comprising a second linear motion guide that is coupled to both of the one opposing support portions so as to be linearly movable. A first movable base capable of positioning control at an arbitrary position in the first linear movement direction facing the horizontal direction in the molding tool drive mechanism, and an arbitrary position in the second linear movement direction orthogonal to the first linear movement direction A second movable base capable of positioning control, and a third movable base capable of positioning control at an arbitrary position in the third linear motion direction orthogonal to the first linear motion direction and the second linear motion direction, respectively. Comprising the first, second and third linear movement directions of the molding tool,
A first linear motion guide that connects both upper and lower ends of the first movable base to the base plate and the ceiling wall so as to be linearly movable in the first linear motion direction;
A pair of first opposing support portions formed on the first movable base and facing each other with the second movable base interposed therebetween;
A second linear motion guide in which the second movable base is connected to both of the pair of first opposing support portions so as to be linearly movable in the second linear motion direction;
A pair of second opposing support portions formed on the second movable base and opposed to each other with the third movable base interposed therebetween;
2. A third linear motion guide that connects the third movable base to both of the pair of second opposing support portions so as to be linearly movable in the third linear motion direction. Wire rod forming machine as described in 1. The molding tool drive mechanism includes a rotary head that is driven to rotate about a first rotation axis that is parallel to the wire feed direction;
A head support protrusion that protrudes from the outer edge of the rotary head that is offset from the first rotation axis toward the wire feeding device;
A fixed table that is rotatably attached to the head support protrusion, is driven to rotate about a second rotation axis that is orthogonal to the first rotation axis, and the molding tool is fixed; The wire rod forming machine according to any one of claims 1 to 4, wherein the wire rod forming machine is characterized in that:   The wire rod forming machine according to claim 1, further comprising a protective wall against which the wire rod is abutted when the wire rod passes through the forming tool.   The wire rod forming machine according to claim 6, wherein the protective wall is configured by a part of the forming tool driving mechanism.

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