JP3020740U - Chuck device for material transfer of forging machine - Google Patents

Abstract

(57) Abstract: An object of the present invention is to ensure that the material can be gripped by the chuck arm without increasing the material gripping force by the chuck arm. A pair of left and right chuck arm mounting shafts,
Rotation levers 15 and 16 that are rotatably connected to each other by a connecting pin 18 are fixedly installed on the shaft 14. One rotation lever 16 is connected to the lower end of the elevating rod 11 penetrating the chuck body 8 to move the chuck arm mounting shafts 14 and 14 in the chuck arm opening direction and up and down in conjunction with the elevation of the elevating rod 11. A connecting link 21 for rotating the chuck arm mounting shafts 14, 14 in the chuck arm closing direction in association with the lowering of the rod 11 is provided, and when the chuck arms 25, 25 are closed, the connecting link 21 is moved up and down. It was provided so as to be inclined with respect to the direction.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a material transfer chuck device for loading and unloading material to and from a front surface of a die provided in a forging station facing a punch.

[0002]

[Prior art]

 A forging machine that molds bolts, nuts, and other various parts, uses raw material supplied from the side of the machine base in a forging station that includes a die and a punch that face each other, and gradually and stepwise. Although a product having a predetermined shape is continuously manufactured by forging, the forming machine of this type is provided with a material transfer chuck for grasping the above material and transferring it between the forging stations. That is, the material transfer chuck is reciprocally moved between the forging stations of the former stage and the latter stage, grasps the material processed in the former stage forging station and conveys it to the latter stage forging station. Therefore, as shown in FIG. 7, in the material transfer chuck, a pair of left and right chuck arms B and B each having a chuck claw A at the lower end are mounted on the pair of left and right chuck arm mounting shafts C and C as well. C, C driven gears D, D are fixedly mounted, and a lifting rod E is passed between both driven gears D, D, and racks F, F formed on the lifting rod E are respectively driven gears D, D. The left and right chuck arm mounting shafts C, C are rotated by engaging with D and raising and lowering the elevating rod E, whereby the chuck arms B, B are moved across the illustrated one-dot chain line position and two-dot chain line position. The material X can be chucked and unchucked by opening and closing.

[0003]

[Problems to be solved by the device]

 However, in the above material transfer chuck, the structure in which the gears D, D fixed to the above-mentioned respective mounting shafts C, C are rotated by raising and lowering the lifting rod E, in other words, when the gears D 1, D rotate, the lifting rod Since E is moved up and down, when the chuck arms B, B are closed and vibration or some external force is applied to the chuck arms B, B, a force acts in the direction to open the chuck arms. The gears D and D are rotated together with the mounting shafts C 1 and C 2, and when the gears D and D rotate, the lifting rod moves in the vertical direction. Therefore, when the chuck arm is vibrated or some kind of external force is applied, or when the transfer speed of a relatively large material is increased, the chuck arm is inadvertently opened and the gripping force becomes insufficient, causing the material to shake off. was there . In order to solve such a problem, it is necessary to set the gripping force of the material by the chuck arm, that is, the pushing down force of the lifting rod to be large.

Therefore, in the present invention, the material can be reliably gripped by the chuck arm without particularly increasing the material gripping force by the chuck arm, and the material is not shaken off even if the material transfer speed is increased. The challenge is to provide a chuck device for material transfer of the press forming machine.

[0005]

[Means for Solving the Problems]

 That is, according to the present invention, in the material transfer chuck device of the forging machine for loading and unloading the material to the front position of the die provided at the forging station facing the punch, the lower part is opened downward. A chuck body having a chamber and having a through hole penetrating the chamber from the upper surface, and a pair of left and right members rotatably supported in the chamber of the chuck body at left and right positions around the through hole. Chuck arm mounting shafts, chuck arms respectively mounted on these mounting shafts, lifting rods that are inserted into the through holes and are driven up and down in conjunction with the operation of the punch, and the chuck arm mountings. Rotating levers that are fixed to the shafts and are rotatably connected to each other via connecting pins, and one of these rotating levers is connected to the lower end of the lifting rod. And a connecting link that rotates the chuck arm mounting shaft in the direction in which the chuck arm opens in conjunction with the raising of the lifting rod, and rotates the chuck arm mounting shaft in the direction in which the chuck arm closes in conjunction with the lowering of the lifting rod. And when the chuck arm is closed, the connecting link is provided so as to be inclined with respect to the ascending / descending direction of the ascending / descending rod.

[0006]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a multi-stage press forming machine, in which a die block 2 is provided at a predetermined position of a machine base of the molding machine 1, and a plurality of die blocks 3 (five in the drawing) are provided. The same number of punches as the dies 3 to 3 face each other on the front surface of a ram (not shown) that is arranged at regular intervals and moves toward and away from the dies 3 to 3. A plurality of forging stations are formed by the respective dies 3 to 3 and the punches, and the material is gradually and stepwise sequentially moved between the punches and the dies 3 to 3 by the forward and backward movement of the punches. It is designed to be forged.

A support frame 4 is slidably mounted on the die block 3 described above. A drive rod 5 that advances and retreats with a predetermined stroke in a die arrangement direction orthogonal to the punch advance and retreat direction is connected to one end of the support frame 4 by a connecting pin 6. As the drive rod 5 moves back and forth, the support frame 4 is reciprocated by a distance equal to the interval between the adjacent dies 3 and 3 within the time when the punch is retracted.

Further, the same number of material transfer chucks (hereinafter abbreviated as chucks) 7 to 7 as the dies 3 to 3 are arranged on the front surface of the support frame 4. Then, as the support frame 4 reciprocates by the drive rod 5, each of the chucks 7 to 7 chucks the material X and transfers it between the dies. In that case, these chucks 7 to 7 have a cassette structure described below and are detachably attached to the support frame 4. That is, the chucks 7 to 7 include a chuck body 8 having a cassette structure as shown in FIGS. As shown in FIG. 3, the chuck body 8 is formed in a flat and substantially home base shape, and a lower portion thereof is provided with a chamber 9 having a convex cross-section opening downward as shown in FIG. At the same time, a through hole 10 is formed in the upper and lower direction penetrating the chamber 9 from the upper surface, and an elevating rod 11 is slidably inserted into the through hole 10. In addition, boss portions 13, 13 for attaching the chuck body 8 to the above-mentioned support frame 4 are provided on both sides of the cylindrical portion 12 forming the through hole 10. Also, chuck arm mounting shafts 14, 14 penetrating the chuck body 8 in the front-back direction are rotatably inserted into the left and right inside of the chamber 9, and the tips of the chuck arm mounting shafts 14, 14 are It is projected to the front side of the chuck body 8 for attaching the chuck arm to the tip. Then, inside the chamber 9, the chuck lever mounting shafts 14, 14 are provided with rotating levers 15, 16 by a well-known key groove coupling structure so as to rotate integrally with the shafts 14, 14. . In that case, a long hole 17 (see FIG. 5) is formed at the tip of one of the turning levers 15, and the other turning lever 16 has a substantially U-shape that sandwiches the counterpart lever 15 from the front and rear. A connecting pin 18 that penetrates the elongated hole 17 is provided so that the left and right rotating levers 15 and 16 can rotate in conjunction with each other. Further, the rotation lever 16 having the above-mentioned connecting pin 18 and the lower end of the elevating rod 11 described above are connected by the pivot pins 19 and 20 and the connecting link 21, whereby the elevating rod 11 is moved up and down. The driving force is transmitted from the connecting link 21 to the respective rotary levers 15 and 16. In that case, the connecting pin 18 is structured so as to come into surface contact with the elongated hole 17 and reliably transmit the driving force to the rotating lever 15. The connecting position by the connecting pin 18 is almost directly below the elevating rod 11 described above.

Further, each of the rotating levers 15 and 16 is divided into two parts for attaching to the chuck mounting shafts 14 and 14, and the chuck arm mounting shafts 14 and 14 are fastened by tightening the split parts 15a and 16a with bolts 22 and 22, respectively. It is fixed at 14.

Chuck arms 23, 24 are attached to the tips of the chuck arm mounting shafts 14, 14 projecting from the chuck body 8, respectively, and these chuck arms 23, 24 are rotated by the rotation of the left and right chuck arm mounting shafts 14, 14. By opening and closing 24, the chuck claws 25, 25 at the tip of the chuck arm chuck and release the material X. The chuck arms 23 and 24 are divided into two parts, like the turning levers 15 and 16, to be attached to the chuck arm attachment shafts 14 and 14, and the two parts 23a and 24a are connected by bolts 26 and 26, respectively. It is fixed to the chuck arm mounting shafts 14, 14 by tightening. In that case, one of the chuck arms 2 is mounted on the chuck arm mounting shaft 14 by setting the angle with the key 27, while the other chuck arm 23 is mounted without using the key-based angle mounting structure. An adjusting bolt 28 that is fitted to the shaft 14 and reaches the chuck arm mounting shaft 14 at the split portion 23a is screwed into a nut 44 fixedly mounted on the chuck arm 23, and is attached to the shaft side with a bolt. By providing the notch step portion 29 for receiving the tip, the chuck arm 23 can be rotated in a minute range with respect to the chuck arm mounting shaft 14 with the bolt 28 loosened. In other words, the mounting angle can be adjusted.

On the other hand, on the machine base behind the support frame 4, a cam shaft (not shown) that is rotated in synchronization with the advance and retreat motion of the punch described above is arranged, and a chuck is attached to the cam shaft. An opening / closing cam for each chuck for opening / closing is fixedly provided, and a cam arm 30 swingable by each of these cams is provided. As shown in FIG. 2, on the intermediate frame 32 provided between the fixed frame 31 and the support frame 4 on the machine base side, the rocker arm 33 having the tip end of the cam arm 30 abutting on the upper end is attached. The other end of the rocker arm 33, which is arranged, is locked to the upper end of the elevating rod 11 of the chuck 7 attached to the support frame 4 by means described later. In this case, the intermediate frame 32 is supported together with the support frame 4 on the machine base by a quadruple link mechanism, and is configured to move integrally when the support frame 4 is driven by the drive rod 5. By mounting the bearing member 35 on the vertical axis 34 rotatably held on the intermediate frame 32 and by mounting the rocker arm 33 on the bearing member 35 by the support shaft 36, the support frame 4 and the intermediate frame 32 are separated. Even if the cam arm 30 moves, the cam arm 30, the rocker arm 33, and the lifting rod 11 are kept connected.

Further, the cam arm 30 is pushed up and biased by a spring member 37, and by pushing down one end of the rocker arm 33 against the spring member 37, the rocker arm 33 raises the elevating rod 11 to move the chuck. It is designed to open the claws 25, 25. However, the cam arm 30 does not forcibly lower the elevating rod 11. Therefore, the cylinder means 38 is provided at one end of the rocker arm 33 so as to face the cam arm 30. The cylinder means 38 is composed of a cylinder 39, a piston 40 and a piston rod 41 built in the cylinder 39, and a connecting member 42 connecting the piston rod 41 and the rocker arm 33, and supports the rocker arm 33 from below. It is considered as a structure. The cylinder means 38 supports the rocker arm 33 by supplying air to the lower cylinder chamber 43 of the cylinder 39, and contracts when the rocker arm 33 is pushed down by the cam arm 30. Air is supplied to 43 to push the rocker arm 33 upward, and the rocker arm 33 operates to lower the ascending / descending rod to close the chuck claws 25.

The opening and closing of the chuck 7 is performed by the vertical movement of the elevating rod 11, and in this case, the drive mechanism is such that the left and right chuck arm mounting shafts 14, 14 are provided with rotary levers 15, 16. The rotary levers 15 and 16 are attached to each other by a connecting pin 18, and one rotary lever 16 is connected to a lower end portion of the elevating rod 11 by a connecting link 21. 21 is pushed down, the turning levers 15 and 16 are turned together, the chuck arms 23 and 24 are closed, and the material is gripped by the chuck arms 23 and 24. Further, the link 21 is pulled up by the elevation of the elevating rod 11, the pivot levers 15 and 16 are pivoted together to open the chuck arms 23 and 24, and the material is separated from the chuck arms 23 and 24.

In that case, when the chuck arms 25, 25 are closed, as shown in FIG. 5, the above-mentioned connecting link 21, that is, the straight line X connecting the pivot pin 19 and the pivot pin 20 is moved up and down by the elevator rod 11. It is provided so as to be inclined with respect to the direction Y.

Thus, when the chuck arms 23 and 24 are closed, the chuck arms 23 and 24 are subjected to vibration or some external force, or when a relatively large material is used, the transfer speed of the material is increased. When a force is applied to the chuck arms 23 and 24 in the direction to open the arms 23 and 24, the rotation levers 15 and 16 are rotated together with the chuck arm attachment shafts 14 and 14 when the speed is increased. In this case, the elevating rod 11 is to be slid in the ascending / descending direction via the connecting link 21. In that case, the connecting link 21, that is, the straight line X connecting the pivot pin 19 and the pivot pin 20 is the elevating rod. 11 is inclined with respect to the ascending / descending direction Y, the force applied to the connecting link 21 is a lateral force component that presses the ascending / descending rod 11 against the inner wall surface of the through hole 10 of the chuck body 8. Will act as. Therefore, even if the chuck arms 23 and 24 are opened, the resistance due to the component force in the lateral direction prevents the movement of the lifting rod 11 in the lifting direction, and the tightened state of the material X by the chuck arms 23 and 24 is maintained. Will be touched. As a result, the material X can be reliably gripped by the chuck arms 23 and 24 without increasing the gripping force of the chuck arms 23 and 24.

Further, an elevating rod 11 is inserted into the chuck body 8 having a cassette structure, and the left and right chuck arm mounting shafts 14 and 14 are attached to the respective pivoting levers 15 and 16 such that they can be rotatably interlocked with each other. One of the rotating levers 16 is connected to the lower end of the elevating rod 11 by a connecting link 21, and the left and right chuck arms 23 and 24 are attached to the chuck arm attaching shafts 14 and 14 in the assembled state. If the bolts 44, 44 passed through the boss portions 13, 13 of the chuck body 8 are fastened to the screw holes (not shown) provided on the front surface of the support frame 4 at the chuck body 8, the chuck 7 is pulled at once. The chuck 7 can be detached only by removing the bolts 44, 44. Therefore, the work such as attachment / detachment and replacement of the chuck 7 can be performed easily and quickly.

Further, one of the left and right chuck arms 23 and 24 described above is attached to the chuck arm mounting shaft 14 at an angle by the key 27, but the other chuck arm 23 is rotatable without using the key. 6 is fitted to the chuck arm mounting shaft 14, and the adjusting bolt 28 provided on the chuck arm side is pressed against the notch step portion 29 formed on the chuck arm mounting shaft 14 as shown in FIG. 6 for positioning. Although the chuck arm 23 is in a slight range with respect to the chuck arm mounting shaft 14 when the bolt 28 is loosened, the chuck arm 23 can be rotated to adjust the mounting angle. Since such a fine adjustment of the mounting angle is possible, the relative postures of the left and right chuck arms 23, 24 can be adjusted. For example, at the time of the first chuck adjustment prior to the operation of the forging machine, one of the material X can be adjusted. The chucks of the left and right chuck claws 25, 25 can be set to be appropriate by finely adjusting and positioning the other chuck claw 25 in the arrow direction from the state in which the chuck claw 25 is positioned first. , The material X is chucked and transferred more accurately.

[0019]

[Effect of device]

 As is clear from the above description, according to the present invention, as the interlocking mechanism from the lifting rod to the chuck arm mounting shaft that opens and closes the chuck, the pair of left and right chuck arm mounting shafts are interlocked with each other by the connecting pins. Each of the movable pivot levers is fixed, and one of the pivot levers is connected to the lower end of the elevating rod, so that the chuck arm mounting shaft is linked to the ascending / descending movement of the elevating rod. A connecting link for rotating the chuck arm mounting shaft in a direction in which the chuck arm is closed and in a direction in which the chuck arm is closed in association with the downward movement of the lifting rod is provided, and when the connecting link is closed, Since the chuck arms are arranged so as to be inclined with respect to the ascending / descending direction of the lifting rods, the chuck arms are closed when the chuck arms are closed. When a force acts in the direction to open the chuck arm when the movement or some external force is applied or when the transfer speed of a relatively large material is increased, rotate the rotating lever together with the chuck arm mounting shaft, The attempt is made to raise the elevating rod via the connecting link.In that case, since the connecting link is inclined with respect to the elevating direction of the elevating rod, the force applied to the connecting link causes the elevating rod to move the chuck body. Since it acts as a lateral force component that presses against the inner wall surface of the through hole of the chuck arm, even if the chuck arm attempts to open, the resistance due to the lateral force component prevents the lifting rod from moving in the ascending direction. As a result, the tightened state of the chuck arm is maintained. As a result, the material can be reliably gripped by the chuck arm without increasing the gripping force of the chuck arm.

[Brief description of drawings]

FIG. 1 is a partially omitted front view of a press forming machine to which the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of a chuck drive mechanism of a press forming machine.

FIG. 3 is a front view of a chuck.

FIG. 4 is a sectional view of a chuck in a chuck release state.

FIG. 5 is a cross-sectional view of the chuck material in a chucked state.

FIG. 6 is an enlarged view of a chuck arm attachment portion.

FIG. 7 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Molding Machine 3 Die 7 Chuck 8 Chuck Body 10 Through Hole 11 Elevating Rod 14 Chuck Arm Mounting Shaft 15,16 Rotating Lever 18 Connecting Pin 21 Connecting Link 23,24 Chuck Arm

Claims (1)

[Scope of utility model registration request] 1. A material transfer chuck device of a forging machine for loading and unloading a material to and from a front surface of a die provided at a forging station facing a punch, and a chamber opening downward to a lower portion. And a pair of left and right chuck arms that are rotatably supported in left and right positions around the through hole in the chamber of the chuck body, the chuck body having a through hole penetrating from the upper surface to the chamber. A shaft and chuck arms attached to these mounting shafts,
An elevating rod, which is inserted into the through hole and is driven up and down in conjunction with the operation of the punch, is fixed to the chuck arm mounting shaft, and is rotatably connected to each other via a connecting pin. A rotary lever and one of the rotary levers are connected to the lower end of the lifting rod, and the chuck arm mounting shaft is moved in the direction in which the chuck arm opens in conjunction with the lifting rod. A connecting link for rotating the chuck arm mounting shaft in a direction in which the chuck arm is closed is provided in association with the lowering of the elevating rod, and when the chuck arm is closed, the connecting link is moved in the elevating direction of the elevating rod. A chuck device for material transfer of a forging machine, which is provided so as to be inclined with respect to it.