JP3033122U - Material transfer device for multi-stage press forming machine - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the accuracy of centering work while efficiently performing maintenance and inspection work such as centering adjustment of a plurality of material transfer chucks at the same position. A support member that supports a chuck mounting plate so that the chuck mounting plate can reciprocate in a direction in which a plurality of forging stations are arranged.
Is supported on the forging machine body 11 so as to be vertically movable and rotatable so as to be moved between a normal working position and a maintenance / inspection position provided on a side portion of the forging machine body 11. A chuck centering adjustment unit 44 having a plurality of centering gauges 49 corresponding to the plurality of material transfer chucks 25 supported by the chuck mounting plate 23 is provided at the maintenance and inspection position. Locking means 50 is provided between the centering adjustment unit 44 and the chuck mounting plate 23 to lock the chuck mounting plate 23 at the centering reference position of the centering adjustment unit 44 when the chuck mounting plate 23 moves to the maintenance and inspection position. It was

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention is a material transfer device of a multi-stage forging machine that sequentially presses materials in stages by a plurality of forging stations composed of dies and punches facing each other. The present invention relates to a material transfer device for a multi-stage press forming machine having a plurality of material transfer chucks that are sequentially transferred to.

[0002]

[Prior art]

 A multi-stage press forming machine for forming bolts, nuts, and various other parts, uses the material supplied from the side of the machine base for roughing at multiple press stations composed of opposing dies and punches. This is a continuous production of products of a predetermined shape by precisely forging in stages, but this type of molding machine uses the above materials or intermediate molded products that are forged at each forging station. It is equipped with a material transfer device that receives and sequentially transfers the received materials to the forging station on the downstream side.

The material transfer device is disclosed, for example, in Japanese Utility Model Publication No. 6-9734.

The material transfer device described in this publication has a supporting member 2 arranged on the upper surface of a press forming machine body 1 and a pair of rocking members on the supporting member 2 as shown in FIGS. 6 and 7. A chuck mounting plate 5 supported so as to be capable of reciprocating in a direction in which a plurality of dies 4 (only one is shown) are arranged through a link 3 (only one is shown), and the chuck mounting plate 5 mounted on the front surface of the chuck mounting plate 5 A material (not shown) supplied from one side of the main body 1 or an intermediate molded product 6 discharged from the front of each die 4 is sandwiched and the chuck mounting plate 5 is reciprocally moved in sequence. Has a plurality of material transfer chucks 7 to be transferred to the front of the chuck, and an opening / closing mechanism (not shown) composed of a cam member or the like for opening / closing each of the chucks 7, and the chuck mounting plate 5 described above to a crank mechanism or the like. The drive is driven by an appropriate drive means. Each material transfer chuck 7 mounted on the front surface of the backpack mounting plate 5 is reciprocated between the axial front surface positions of the adjacent die 4, and each material transfer chuck 7 is made of a material or an intermediate molded product during the reciprocal movement. 6 is received and sequentially transferred to the axial front surface position of the die 4 on the downstream side.

By the way, in the above-described multi-stage forging machine, it is necessary to obtain a forging product in which the axial center of each material transfer chuck and the axial center of the punch and the die are perfectly aligned with each other. This is a prerequisite, and even if there is a slight misalignment between these axes, defective products will be formed.

Therefore, maintenance inspection work such as inspection or adjustment of the axial center of each material transfer chuck 7 with respect to the axial center of the punch or die 4 is regularly performed. In order to improve workability, the following centering adjustment means for each material transfer chuck in the material transfer device is provided.

As the centering adjusting means, as shown in FIGS. 6 and 7, the support member 2 is provided on the main body 1 of the forging machine together with the chuck mounting plate 5 and the chucks 7 for transferring the respective materials to the normal operating positions. It is supported so that it can move up and down and horizontally so as to reciprocate between it and the maintenance inspection position provided on the side of the forging machine body 1, and at the maintenance inspection position, each material transfer chuck 7 and A chuck centering adjustment jig 9 having a plurality of corresponding centering gauges 9a is provided.

Then, at the time of maintenance and inspection work of each material transfer chuck 7, the chuck mounting plate 5 and its driving means are disconnected, and the support member 2 is lifted and rotated with respect to the forging machine body 1. As a result, each material transfer chuck 7 together with the chuck mounting plate 5 is moved to the maintenance / inspection position provided on the side of the forging machine body 1, and each of the centering adjustment jigs 9 installed in the maintenance / inspection position. The centering adjustment of each material transfer chuck 7 is performed based on the centering gauge 9a. That is, for example, the chuck claws of the material transfer chucks 7 are opened and closed with the chuck claws corresponding to the centering gauges 9a, and the axes of the chucks are grasped when the centering gauges are gripped. If there is any misalignment after checking the misalignment of the core or the misalignment of the gripping timing, centering adjustment will be performed by adjusting the protrusion length of the chuck claw and the attachment angle of the chuck claw.

[0009]

[Problems to be solved by the invention]

 However, in the centering adjustment means of each material transfer chuck in the above material transfer device, the connection between the chuck mounting plate 5 and its driving means is released, and then, together with the support member 2, each material transfer chuck is used. Since the structure in which the chuck mounting plate 5 supporting the chuck 7 is simply moved from the normal working position to the maintenance / inspection position, when the support member 2 is moved to the maintenance / inspection position, the chuck mounting plate 5 is moved to the support member 2 With respect to the chuck mounting plate 5, in a movable state, the centering reference position of the centering adjusting jig 9 can be adjusted at the same time so that the centering adjustments of the respective material transfer chucks 7 can be performed based on the respective centering gauges 9a. However, it is difficult to accurately perform centering adjustment of each material transfer chuck 7 by each centering gauge 9a.

Therefore, the present invention can efficiently perform maintenance and inspection work such as centering adjustment of each material transfer chuck in the material transfer device equipped in the multi-stage press forming machine, and The challenge is to be able to perform centering adjustments with high accuracy.

[0011]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is characterized by using the following means.

That is, according to the present invention, a plurality of material transfer chucks for sequentially transferring a material to a plurality of press forming stations each including a die and a punch facing each other, and a chuck mounting plate to which these chucks are attached. And a support member that reciprocally supports the chuck mounting plate in the direction in which the forging stations are arranged, and the chuck mounting plate is driven so that each material transfer chuck reciprocates between the adjacent dies. In a material transfer device of a multi-stage forging machine having a chuck driving means, the chuck mounting plate is provided between the normal working position and each maintenance inspection position provided on the side of the forging machine body together with the chucks for transferring materials. The support member is supported on the main body of the forging machine so that it can move up and down and turn, and moves to the maintenance inspection position together with the support member. A chuck centering adjustment unit corresponding to each material transfer chuck is provided, and when the chuck mounting plate is moved to the maintenance / inspection position between the centering adjustment unit and the chuck mounting plate, the chuck mounting It is characterized in that a locking means is provided for locking the plate at the centering reference position of the centering adjusting unit.

By using such means, according to the present invention, at the time of maintenance and inspection work of each material transfer chuck, the connection between the chuck mounting plate and its driving means is released, and the support member is pressed. By lifting and swiveling with respect to the main body of the molding machine, the chuck mounting plate on which a plurality of material transfer chucks are mounted is moved to the maintenance / inspection position provided on the side of the main body of the forging machine. At this maintenance / inspection position, the chuck mounting plate is locked to the centering adjusting unit by the locking means provided between the chuck mounting plate and the centering adjusting unit. Based on the centering gauges of the centering adjusting means, all the chucks are locked at the centering reference position of the centering adjusting unit which can perform centering at the same position. As a result, at the maintenance and inspection position, the centering adjustment of each material transfer chuck can be accurately performed based on each centering gauge of the centering adjustment unit, and the centering accuracy is improved. .

[0014]

[Embodiment of the invention]

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an example showing a schematic configuration of a multistage forging machine, and this multistage forging machine 10 is, as shown in FIGS. A die block 12 (see FIG. 2) is fixed, and a plurality of dies 13 ... 13 (five in the example in the figure) are arranged in parallel on the die block 12. Further, the same number of punches 15 ... 15 as the die 13 are attached to the front surface of the ram 14 which is moved back and forth toward the die 13 by an appropriate driving means such as a crank mechanism (not shown). Thus, each punch 15 and each die 13 form a plurality of stages of forging stations (a) to (e). Then, the punches 15 are moved back and forth toward the dies 13 by the ram 14 to roughly remove the material (not shown) supplied from one side of the machine base at each forging station (a) to (e). Products such as bolts and nuts, parts of various shapes, etc. are continuously formed by precisely forging stepwise.

As shown in FIG. 2, a material supply quill that supplies the wire rod a from one side of the die block 12 to the front side of the die block 12 from behind the main body 11 of the forging machine 10. 16 is arranged, and the wire rod a pushed forward by a predetermined amount from the material supply quill 16 is reciprocally driven in a predetermined stroke in a direction in which the dies 14 are arranged in parallel with each other in association with the forward / backward movement of the ram 14. By being cut by the cutter means 17 to be cut, a material having a predetermined size is formed. Further, a pusher 18 is arranged adjacent to the material supply quill 16, and the material cut into a predetermined size by the cutter means 17 is pushed forward by the pusher 18 toward the front. .

Further, above the die block 12, there is provided a material transfer device 20 for sequentially transferring the material to the forging stations (a) to (e). This material transfer device 20 is shown in FIGS. As shown in FIG. 3, a frame member 21 disposed on the main body 11 and a pair of left and right swing arms 22a and 22b having one end pivotally attached to both sides of the frame member 21 so as to be swingable. A pair of chucks is attached to the other ends of the pair of swing arms 22a and 22b so that both sides thereof are rotatably supported by shafts 22c and 22d, respectively, and reciprocally movable in the direction in which the dies 13 are arranged side by side. The plate 23, the intermediate frame 24 between the chuck mounting plate 23 and the frame member 21, both sides of which are rotatably connected to the pair of swing arms 22a and 22b, respectively. The chuck mounting plate 23 has a plurality of material transfer chucks 25 ... 25 provided on the front surface of the chuck mounting plate 23 at the same intervals as the dies 13 arranged side by side and in the same number as the dies 13. As shown in FIG. 2, each of the material transfer chucks 25 has a chuck main body 25a attached to the front surface of the chuck mounting plate 23 and a pair of support shafts 25b and 25b for rotating the chuck main body 25a. The chuck arms 25c and 25c are movably supported, and the chuck claws 25d and 25d are respectively attached to the lower ends of the chuck arms 25c. In the embodiment shown in the drawings, the shaft 22c is rotatably supported by the chuck mounting plate 23 via bearings as shown in FIG. 5, and the swing arm 22a is mounted by the mounting bolts 22e and 22e. It is fixed integrally.

Further, one end of a drive rod 26 which is reciprocally driven with a predetermined stroke in synchronization with the forward / backward movement of the ram 14 is detachably connected to one side of the chuck mounting plate 23. By reciprocally driving the chuck mounting plate 23 in the direction in which the dies 13 are arranged side by side by the drive rod 26, the material transfer chucks 25 mounted on the front surface of the chuck mounting plate 23 are positioned in front of the axes of the adjacent dies 13. It is designed to reciprocate between.

Further, on the upper surface of the main body 11 behind the frame member 21, opening / closing cams 27 ... 27 for each chuck 25 for opening / closing each material transfer chuck 25 are fixedly mounted on a cam drive shaft. 28 are rotatably provided, and a plurality of cam arms 29 ... 29 that are swung in accordance with the rotation of each of the cams 27 are supported on the upper surface of the frame member 21 at predetermined intervals, and A plurality of rocker arms 30 ... 30 with which the tip portions of the cam arms 29 come into contact are swingably arranged at a predetermined interval on the upper surface of the intermediate frame 24, and the above-mentioned material transfer to the front end portions of these rocker arms 30. Each of the rod members 31 ... 31 protruding upward from the upper end of the device 25 is locked. Although not shown, on both side surfaces of the lower end of each rod member 31, there is provided a gear portion which meshes with a sector gear integrally provided with each of the support shafts 25b, 25b supporting the pair of chuck arms 25c, 25c. The rod members 31 are vertically driven by the rocking of the cam arms 29 and the rocker arms 30 accompanying the rotation of the cams 27, whereby the chuck arms 25c, 25c are moved to the support shafts 25b, 25c. The chuck claws 25d, 25d are opened and closed by being rotated around 25b. As a result, as shown in FIG. 2, the material cut into a predetermined size by the cutter means 17 and pushed forward by the pusher 18 or the intermediate molded product (not shown) discharged forward from each die 13 is It is sandwiched by a pair of chuck claws 25d and 25d in the material transfer chuck 25, and in this state, the chuck rod 23 is moved forward by the drive rod 26 to the front surface of the adjacent die 13 to form the material and the intermediate molding. The product is transferred to the front position of the axial center of the die 13, and the chuck claws 25d and 25d are opened by the punching of the material and the intermediate molded product into the die 13, and thereafter, In this case, it is moved back to the front position of the die 13 on the front side.

Further, as shown in FIG. 1, hydraulic fixing means 32 for fixing the frame member 21 at a normal working position of the main body 11 is provided on both sides of the frame member 21. . The hydraulic fixing means 32 is provided with inclined projecting pieces 32a, 32a integrally provided on both side portions of the frame member 21, respectively, and these projecting pieces 32a, 32a can be engaged and disengaged respectively with the frame member. It is composed of piston rods as fixing pieces 32b 1, 32b for fixing the whole 21 and hydraulic cylinders 32c, 32c for engaging and disengaging the fixing pieces 32b, 32b with the respective protruding pieces 32a, 32a.

Further, in this embodiment, as shown in FIG. 1 or 3, a support base 34 is arranged behind the cam shaft 28. The base portion 34a of the support base 34 is fixed to the upper end portion of a vertically extending base shaft 36 rotatably supported by a bearing member 35 fixed to the rear end of the body 11 of the press molding machine 10 via a key 36a. In addition, a pair of support brackets 37, 37 are fixedly mounted on the upper surface of the support base 34, and a support shaft 38 is rotatably supported by the support brackets 37, 37.

On the other hand, the frame member 21 is fixedly provided with a pair of arm members 21a, 21a extending rearward of the main body 11 beyond the cam shaft 28, and the rear ends of the arm members 21a, 21a are fixed. It is fixed to both ends of the support shaft 38 by keys 38a, 38a.

Further, a worm wheel 39a is fixed to one end of the support shaft 38 so as to rotate integrally with the support shaft 38, and a worm gear 39b meshing with the worm wheel 39a is rotated. A first drive motor 40, which is a pulse motor or the like, is attached to the support bracket 37. As a result, by rotating the support shaft 38 in the predetermined direction by the first drive motor 40, the pair of arm members 21b, 21b are rotated rearward and upward with the support shaft 38 as the center. As shown by the chain line in FIG. 3, each material transfer chuck 25 supported by the frame member 21 and the chuck mounting plate 23 is swingable to a retracted position above the normal working position.

A gear 41a is integrally attached to the lower end of the base shaft 36, and a second drive motor 42 such as a pulse motor for rotating a drive gear 41b meshing with the gear 41a is provided. It is attached to the rear surface of the main body 11 of the forging machine 10 via a support bracket 43, and by rotating the base shaft 36 by the second drive motor 42, the support base 34 is centered on the base shaft 36 in a horizontal plane. It is turning.

On the other hand, as shown in FIGS. 1 and 2, the side portion of the main body 11 of the forging machine 10 is set to the maintenance inspection position (f), and the material transfer device is set to the maintenance inspection position (f). A centering adjustment unit 46 for adjusting the axial center of each pair of chuck claws 25d, 25d of each material transfer chuck 25 in FIG.

As shown in FIGS. 1 and 2, the centering adjustment unit 46 is supported via mounting brackets 47, 47 fixed to the side portion of the main body 11 and the above-mentioned each on the upper surface. .. 48a corresponding to the transfer chuck 25 and the adjusting unit body 48, and the pair of insertion holes 48b formed in the supporting portions 48a of the adjusting unit body 48. The chuck claws 25d, 25d have centering gauges 49 ... 49 which are inserted and supported at a pitch corresponding to a regular axial center interval. The centering gauges 49 ... 49 are removably inserted into the insertion holes 48 b of the support portions 48 a, and can be appropriately replaced according to the die 13 used.

Then, between the centering adjustment unit 46 and the chuck mounting plate 23, when the chuck mounting plate 23 is moved to the maintenance / inspection position (f), the chuck mounting plate 23 is attached to the adjustment unit 46. Locking means 50 for locking at the centering reference position is provided.

As shown in FIG. 5, the locking means 50 is provided at the lower end of a shaft 22c that supports one swing arm 22a of the chuck mounting plate 23, and is provided on the same axis as the shaft 22c. Engaging member 51 having an engaging hole 51a, a lock pin 52 provided at one end of the adjusting unit body 48 and fitted in the engaging hole 23a, and the lock pin 52 It has a hydraulic cylinder 53 that moves back and forth toward the joint hole 51a. In that case, the lock pin 52 has the normal axis of the pair of chuck claws 25d, 25d located on the drive rod side of the chuck mounting plate 23 and the axis of the shaft 22c that supports one swing arm 22a. And the positional relationship between the shaft center of the centering gauge 47 on the lock pin side and the shaft center of the lock pin 52 are the same. As a result, when the lock pin 52 is fitted into the engagement hole 23a, the chuck mounting plate 23 is prevented from swinging through the swing arms 22a and 22b, and the center of the centering adjustment unit 46 is prevented. Based on the centering reference position, that is, the centering gauges 47, the centering adjustments of the material transfer chucks 25 are locked at the same position.

Further, a controller (not shown) for controlling the operation of the hydraulic cylinder 53 in the hydraulic fixing means 32, the first and second drive motors 40 and 42, and the locking means 50 is provided, and the controller is operated. An operation signal is input from a section (not shown), and the controller controls the operations of the hydraulic fixing means 32, the first and second drive motors 40 and 42, and the hydraulic cylinder 53 by the input signal. It is designed to output a signal.

Next, in the material transfer device configured as described above, the axis misalignment of each of the pair of chuck claws 25 d, 25 d in each material transfer chuck 25 with respect to the axis of each die 13 and each punch 14 or its deviation The operation when the adjustment is performed will be described.

First, the connection state between the chuck mounting plate 23 and the drive rod 26 is released, and then the operating portion is operated, whereby the hydraulic pressure fixing means 32 1 and 32 2 are controlled by the controller and the hydraulic pressure fixing means is controlled. The locked state by 32, 32 is released, and then the worm gear 39b is rotated by the first drive motor 40, and the transfer member is moved together with the frame member 21 around the support shaft 38 rotatably supported by the support base 34. The hook 24 is swung from the normal working position shown by the solid line in FIG. 3 to the retracted position as shown by the phantom line. Then, in this state, the second drive motor 42 rotates the base shaft 36, whereby the support base 34 is swung around the base shaft 36, and the whole of the support base 34 is shown in the state shown in FIG. It is turned to the position shown by the virtual line of 4. As a result, the material transfer chucks 25 together with the frame member 21 are moved to the maintenance / inspection position (f) provided on the side portion of the forging machine body 11.

Then, at the maintenance / inspection position (f), the frame member 21 is centered and adjusted by the first drive motor 40 so as to face the centering and adjusting unit 46 and face each other. After that, the chuck mounting plate 23 is locked to the adjustment unit main body 48 by the locking means 50 provided between the chuck mounting plate 21 and the centering adjustment unit 46. As a result, the chuck mounting plate 23 is moved to the centering reference position of the centering adjusting unit 46, that is, the centering gauges 49 of the centering adjusting unit 46, and the centering of all the material transfer chucks 25. It will be locked accurately and securely without any misalignment at the same position where they can be extended. As a result, the centering adjustment of each material transfer chuck 25 can be accurately performed at the same position based on each centering gauge 49 of the centering adjustment unit 46 installed at the maintenance / inspection position (f). Therefore, the centering accuracy is improved.

Further, after maintenance and inspection, the cylinder 53 of the locking means 50 is controlled by the controller by operating the operating portion again, and the lock pin 52 is withdrawn from the engaging hole 51a. The engagement between the lock pin 52 and the engagement hole 51a is released, and the lock between the chuck attachment plate 23 and the adjustment unit body 48 is released. After that, the operations of the first and second drive motors 40, 42 are controlled to move the material transfer chucks 25 together with the frame member 21 to the normal use position, and the frame member 21 moves to the normal use position. When mounted on, the frame member 21 is fixed to the forging machine body 11 by the hydraulic pressure fixing means 32.

In the above embodiment, the engagement hole 51a of the lock means 50 and the lock pin 52 are arranged so as to be aligned with the axis of the pivot shaft 22c supporting one swing arm 22a. However, based on the centering gauges 49 of the centering adjustment unit 46, the chuck mounting plate 23 can be placed at the centering reference position of the centering adjustment unit 46, in which all the material transfer chucks 25 can be centered at the same position. It suffices if it can be locked, and it is not limited to the axial position of the pivot shaft 22c that supports the swing arm 22a.

[0035]

[Effect of the invention]

 As is clear from the above description, according to the present invention, a plurality of material transfer chucks mounted on the chuck mounting plate are provided at a maintenance inspection position provided on the side portion of the forging machine body. A chuck centering adjustment unit having a centering gauge is provided, and when the chuck mounting plate is moved to the maintenance / inspection position between the centering adjustment unit and the chuck mounting plate, the chuck Locking means for centering the mounting plate and locking it at the centering reference position of the adjustment unit is provided. Therefore, at the time of maintenance and inspection work of each material transfer chuck, the chuck mounting plate 5 and its driving means should be connected. By releasing and lifting the support member to the forging machine body and rotating it, the chuck mounting plate is moved to the maintenance inspection position on the side of the forging machine body. At the position, the chuck mounting plate is locked to the centering adjusting unit by the locking means provided between the chuck mounting plate and the centering adjusting unit, so that the chuck mounting plate is adjusted to the centering reference position of the adjusting unit. It is possible to lock it to. As a result, the centering adjustment of each material transfer chuck can be accurately performed based on each centering gauge of the centering adjustment unit installed at the maintenance and inspection position, and the centering accuracy is improved. It will be.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a multi-stage press forming machine equipped with a material transfer device of the present invention.

FIG. 2 is an enlarged cross-sectional view of a material transfer device.

3 is a cross-sectional view showing the configuration of the material transfer device as seen from the line AA in FIG.

FIG. 4 is a side view showing a turning state of the frame member to a maintenance and inspection work position.

FIG. 5 is a vertical sectional view of the chuck mounting plate locked to the centering adjustment unit.

FIG. 6 is an explanatory view of a conventional example.

FIG. 7 is a partially cutaway front view showing a rotation state of the frame member to a maintenance / inspection work position.

[Explanation of symbols]

 10 Press Forming Machine 11 Press Forming Machine Main Body 13 Die 15 Punch 21 Frame Member 25 Material Transfer Chuck 23 Chuck Mounting Plate 46 Centering Adjusting Unit 49 Centering Gauge 50 Locking Means

Claims (1)

[Utility model registration claims] 1. A plurality of material transfer chucks for sequentially transferring a material to a plurality of forging stations, each of which comprises a die and a punch facing each other, a chuck mounting plate to which these chucks are mounted, and this chuck mounting plate. A multi-stage type having a supporting member that supports the chucking plate so that the chucking plate can reciprocate in the direction in which the forging stations are arranged, and chuck driving means that drives the chuck mounting plate to reciprocate between the adjacent dies. A material transfer device for a forging machine, wherein the chuck mounting plate moves together with each material transfer chuck between a normal working position and a maintenance / inspection position provided on a side portion of the forging machine body. The support member is supported by the main body of the forging machine so as to be vertically movable and rotatable, and at the same time as the maintenance inspection position, the material transfer chucks that have moved together with the support member are moved. A chuck centering adjustment unit corresponding to the chuck mounting plate is provided, and when the chuck mounting plate is moved to the maintenance / inspection position between the centering adjustment unit and the chuck mounting plate, the chuck mounting plate is attached to the chuck mounting plate. A material transfer device for a multi-stage forging machine, comprising locking means for locking the centering adjustment unit at a centering reference position.