JPH059732U - Locking and unlocking device of punch in forging machine - Google Patents

Abstract

(57) [Summary] [Purpose] To enable automatic locking and unlocking of a punch attached to a ram of a forging machine via a punch holder. [Structure] A lock pin 9 inserted through a punch holder 6 so as to be vertically movable is urged downward by a coil spring 18. Then, the lock pin 9 is moved downward and is engaged with the notch portion 8 of the punch 7, whereby the punch 7 is moved to the punch holder 6
To be locked in. On the other hand, a lock pin upper moving device 21 is installed outside the ram 4, and by driving the upper moving device 21, the lock pin 9 itself or the link mechanism 10 connected to the lock pin 9 is moved upward at its tip. To do so. By this upward movement, the lock pin 9 is disengaged from the notch portion 8 of the punch 7, and the punch 7 is unlocked. [Effect] Since it is not necessary to install a drive device for operating the lock pin on the ram side, it is possible to easily perform maintenance work such as a punch mounting location.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  This invention relates to a press forming machine for parts such as bolts and nuts, and especially for press forming. Automatically locks and locks the punch that is attached to the machine ram via the punch holder. Unlocking device.

[0002]

[Prior art]

  Conventionally, as a press forming machine for parts such as bolts and nuts, it was installed side by side in the horizontal direction. Multiple dies and multiple punches mounted on a ram that moves back and forth with respect to the dies With these dies and punches, metal materials are gradually forged from rough to fine. Thus, a multi-stage press forming machine is known which is designed to form parts having a predetermined shape.

[0003]   The mounting of the punch in such a forging machine is generally fixed on the front surface of the ram. Insert the punch into each punch holder, and insert the punch from the peripheral surface of the punch holder. The bolt is screwed into the punch holder and tightened. This is done by pressing the notch. To install in this way As a result, the punch fitted in the punch holder is locked by the bolt. It is possible to prevent the punch from coming out of the punch holder during the operation of. Take another punch When removing it, loosen the bolt and retract the bolt tip from the punch notch. The punch lock is released, so the punch becomes free and the punch The punch can be pulled out from the holder.

[0004]   By the way, to lock and unlock the punch, use the bolts manually as described above. In addition to rotating it, insert the lock pin into each punch holder and Configuration that is automatically performed by rotating each drive with a drive device Is also known. For example, it is shown in FIG. 6 of Japanese Utility Model Laid-Open No. 2-133239. Insert the lock pin vertically into the punch holder and When the punch is locked, the lock pin is Rotate to engage its peripheral surface with the notch of the punch, and when unlocking, Rotate the cup pin 180 ° so that the concave part on the peripheral surface matches the notch part of the punch The lock pin is rotated by the operation of the cylinder. It is known.

[0005]

[Problems to be solved by the device]

  However, as described above, the punch can be automatically locked and unlocked. Drive, the number of punches, that is, the number of lock pins Since the device (cylinder) must be installed on the ram side, the structure on the ram side is extremely complicated. As a result, maintenance work such as the punch mounting location becomes very difficult. There was a drawback.

[0006]

[Means for solving problems]

  This invention was made in view of the above points, and the purpose is to move it downward. The punch locks when it is moved, and the lock is released when it is moved up. Insert the lock pin into the punch holder and move the lock pin downwards. The operation is performed by the biasing means, and the upward movement is performed by the upward movement device installed outside the ram. In this way, punching can be performed without installing a drive device for operating the lock pin on the ram side. In a forging machine that automatically locks and unlocks the To provide a locking and unlocking device for the.

[0007]   In other words, this invention is designed in front of the fixed die in order to achieve the above-mentioned object. The ram is arranged so as to move back and forth with respect to the die, and the front end face of this ram The punch holder fixed to the die and the die The punches mounted on the ram so that they face each other, and the cutting formed on the outer periphery of this punch. The punch holder is inserted into the punch holder so that it can be engaged with the notch, and is moved downward. Is engaged with the notch of the punch and locks the punch in the punch holder. Installed on the outside of the ram, and a pin for urging the lock pin downward. When the ram moves to the retracted position, it is driven to move up and The lock pin itself or a link connected to the lock pin whose end is located above Abutting against the mechanism to move the lock pin upward against the biasing force of the biasing means. The lock pin is released from the notch of the punch by the movement, and the punch is unlocked. And a lock pin moving device.

[0008]

[Action]

  With the above-mentioned configuration, the lock pin is not moved downward by the biasing means. This downward movement causes the lock pin to engage with the notch in the punch, so The punch holder will be locked and the punch will not come out of the punch holder. It can be prevented. When the ram moves to the retracted position, the lock pin upper drive is driven to When the lock pin is moved upward, the lock pin is released from the notch of the punch. Since the punch is unlocked by this detachment, the punch is punched. It will be free in the holder. Therefore the punch is automatically locked and locked It can be canceled.

[0009]

【Example】

  A first embodiment of the present invention will be described below with reference to FIGS. 1 is forging Molding machine body, 2 is a die block fixed to the body 1, 3 is a die block As a result, a plurality of dies (only one shown in the figure ). 4 is a body which moves forward and backward with respect to the die 3 in front of the die 3. With the ram installed at No. 1, the punch holder 6 is attached to the front end face via the punch block 5. The dies 3 are fixed to each other at the same intervals. 7 is fitted in the punch holder 6 By doing so, the punch is attached to the ram 4 so as to face the die 3. 8 Is a notch for engaging the lock pin formed on the outer periphery of the punch 7, and is a wall that becomes the engaging surface 8a. The surface is inclined toward the tip side of the punch 7. 9 is a punch holder 6 Is inserted vertically into the punch holder 6 from the upper surface of the punch 7 toward the notch 8 of the punch 7. The lower end of the lock pin is engaged with the engaging surface 8a of the cutout portion 8 of the punch 7 by being moved downward. The punch 7 is locked to the punch holder 6 by this engagement. ing.

[0010]   Reference numeral 10 is a link mechanism including a link 11 and a link tilt rod 12, As shown in FIG. 3, one end of 11 is pivoted to the upper part of the punch holder 6 by a pivot shaft 13. While being worn, pan across the groove formed in the center of the upper end of the lock pin 9. The rod 12 is arranged on the top of the holder 6, and the rod 12 has an upper end on the other end of the link 11 and a pin 1 4 and the punch holder 6 has a free hole formed in the vertical direction on the side of the punch holder 6. When the punch holder 6 is inserted into the insertion hole 15, the punch holder 6 is arranged so as to hang downward. Has been. Then, a long hole 16 (second (Fig.) By inserting the shaft rod 17 from the side surface of the lock pin 9, The upper end of the lock pin 9 is pivotally attached.

[0011]   18 is interposed between the lower surface of the punch holder 6 and the lower portion of the link tilting rod 12. A coil spring as a biasing means that is locked by the biasing force of the coil spring 18. The cable 12 is constantly pulled downward, and the pulling force pulls the rod 12 and the link 1 The lock pin 9 is urged in the downward direction via 1. 19 is a lock A coil spring receiver fixed to the lower end of the coil 12 by screwing the lower end of the terminal 12, Is a lock nut for preventing the receiving body 19 from loosening.

[0012]   Reference numeral 21 is a lock pin upper moving device formed of an oil cylinder, and the ram 4 moving forward and backward is When moving to the last retracted position, below or in the vicinity of the link tilt rod 12 above it. It is installed on the aircraft 1 so as to be located at. 22 is a piston lock of the upper moving device 21. Denoted at 23 are top plates fixed to the tip of the piston rod 22 and driven by the upper moving device 21. Then, the piston rod 22 is lifted and the top plate 23 is tilted. It contacts the lower part of the working rod 12. This upper device 21 is a piston When the rod 22 descends, the top plate 23 is positioned below the lower surface of the ram 4. Therefore, the ram 4 is prevented from moving forward and backward. In addition, the upper moving device 21 is As shown in Fig. 2, if one is installed for two adjacent link tilt rods 12, In both cases, the size of the top plate 23 is such that it abuts both link tilting rods 12. In addition to the above, the one for three or more link tilting rods 12, Alternatively, one may be installed for each link tilting rod 12.

[0013]   24 is arranged so as to penetrate the punch block 5 so as to contact the rear end of the punch 7. Spacer 25 is a punch which is vertically movable inside a vertical hole 26 formed in the ram 4. The front wall surface 25a is in contact with the rear end of the spacer 24. 27 is It is a vertical movement mechanism of the adjusting body 25, and is provided so as to project upward on the upper surface of the adjusting body 25, and the upper part thereof is a ram. 4 a screw shaft 29 protruding through the base 28 fixed to the upper surface of the ram 4 and protruding above the ram 4. By being screwed onto this screw shaft 29, it is rotatably mounted on the base 28. And a gear 30 for rotating the screw shaft. 31 meshes with gear 30 The drive gear, 32 is a drive shaft of the gear 31, and is driven by a motor (not shown). It is driven to rotate forward and backward. By rotating the drive shaft 32, the gear 31 The gear 30 is rotated via the screw shaft 29, and the adjustment body 25 is rotated through the screw shaft 29. It is moved up or down along the rear wall surface 26a of the 26. And by this vertical movement The front wall surface 25a of the prepared body 25 is displaced forward and backward, and the punch 7 is moved by this displacement movement. It is moved back and forth through the spacer 24 to adjust the front and rear position of the punch 7. ing. When adjusting the front-rear position of the punch 7 as described above, the punch 7 is locked. Since the lock must be released, the vertical position of the lock pin 9 is detected. A sensor (not shown) can be installed near the lock pin 9 to confirm it. It is good practice.

[0014]   Since the link tilting rod 12 is configured as described above, the coil spring 18 The pulling force always lowers the rod 12 and the lever 12 The lock pin 9 is moved downward via the link 11, and the lower end of the lock pin 9 is moved by this downward movement. Is engaged with the engaging surface 8a of the notch portion 8 of the punch 7, and this engagement causes the punch 7 to pan. It is locked to the holder 6 (Figs. 1 and 2). Therefore punch 7 is punch hole You can prevent it from getting out of the da 6.

[0015]   And when it becomes necessary to adjust the front and rear position of the punch 7, the operation of the machine is stopped. After moving the ram 4 to the most retracted position, the lock pin moving device 21 is driven. Then, the piston rod 22 moves upward, and the top plate 23 at the tip of the piston rod 22 moves the link tilting roll. The lower end of the head 12 (the lower part of the coil spring receiver 19) is brought into contact with the rod 12 to The spring 11 is pushed up against the urging force of the spring 18, and the push-up causes the link 11 to pivot. It is tilted upward with 13 as a fulcrum, and this tilt moves the lock pin 9 upward. The lower end of the punch 7 is disengaged from the engaging surface 8a of the notch portion 8 of the punch 7, and the punch 7 is unlocked. (FIGS. 4-5). This allows the punch 7 to be free in the punch holder 6. Then, the driving gear 31 is rotated to drive the adjusting body 25 upward. Is moved downward to adjust the front-back position of the punch 7. After adjustment, lower the piston rod 22. When lowered, the link tilt rod 12 is also moved downward by the biasing force of the coil spring 18. Therefore, the link 11 is also returned to its original position, and the lower end of the lock pin 9 is locked. The engagement surface 8a of the cutout portion 8 of the punch 7 is engaged (FIGS. 1 and 2). Therefore bread The switch 7 is locked again, and then the machine is restarted.

[0016]   Next, FIG. 6 shows only the second embodiment of the present invention which is different from the first embodiment. ~ It demonstrates below based on FIG. The lock pin 9 has an axial direction at a predetermined position on the peripheral surface. Direction, a recess 33 is formed over a certain length, and the lock pin 9 is Pan so that it can project to the bottom of the holder 6 and engage with the notch 8 of the punch 7. It is inserted vertically in the side portion of the chitch holder 6 and is moved downward so that the recess 33 The upper peripheral surface is engaged with the cutout portion 8 of the punch 7. Punch 7 in this case As shown in FIG. 7, the notch portion 8 of the punch has a length in the length direction of the punch which is straight to the lock pin 9. It is formed to be slightly longer than the diameter so that the front-back position of the punch 7 can be adjusted. Also The coil spring 18, which is an urging means in the downward movement direction of the lock pin, is provided below the punch holder 6. It is inserted between the surface and the lower part of the lock pin 9.

[0017]   In the case of the above configuration, the lock pin 9 is lowered by the urging force of the coil spring 18. The peripheral surface above the recessed portion 33 is engaged with the cutout portion 8 of the punch 7. Then, the punch 7 is locked (the position shown by the solid line in FIG. 6). In addition, the lock pin moving device 21 is driven, the top plate 23 at the tip of the piston rod 22 is locked. The lower end of the coil 9 (the lower end of the coil spring receiving member 19) and the lock pin 9 is coiled. The lock pin 9 is moved upward against the urging force of the spring 18 so that the recess 33 of the lock pin 9 cuts the punch 7. It is made to coincide with the notch 8 (the position of the dashed line in FIG. 6). This allows the lock pin Since 9 is removed from the notch 8 of the punch 7, the punch 7 is unlocked.

[0018]   In the first and second embodiments described above, when adjusting the front-back position of the punch, the punch is rotated. Although the case of locking and unlocking has been described, the present invention can be applied to other than the above. Needless to say, can be applied.

[0019]

[Effect of device]

  As described above, the present invention is based on a lock that is inserted vertically into the punch holder. The downward movement of the cup pin is by the biasing means, and the upward movement is the lock pin installed outside the ram. Since it is designed to operate the lock pin, Automatically locks and punches without installing a drive such as a dam on the ram side. You will be able to unlock. Therefore, it is possible to eliminate the complicated structure of the ram side. Punches that can easily perform maintenance work such as punch mounting points Lock and unlock device.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part showing a first embodiment of a lock and unlock device for a punch in a forging machine.

FIG. 2 is a partially cutaway front view of a ram side in FIG.

FIG. 3 is an enlarged perspective view showing a portion of a link mechanism in FIG.

FIG. 4 is a longitudinal cross-sectional view of a main part showing a state in which the lock pin moving device is driven and the lock pin is moved when the ram moves to the retracted position.

5 is a partially cutaway front view of the ram side in FIG. 4. FIG.

FIG. 6 is a vertical cross-sectional view of a main part showing a second embodiment of the punch lock and lock release device in the forging machine.

FIG. 7 is an enlarged cross-sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

3 dies 4 Ram 6 punch holder 7 punches 8 notches 8a engagement surface of notch 9 Lock pin 10 link mechanism 11 links 12 Link tilting rod 18 Coil spring (biasing means) 21 Lock pin moving device 33 recess

Claims (3)

[Scope of utility model registration request] 1. A ram arranged so as to move forward and backward with respect to the fixed die, a punch holder fixed to a front end face of the ram, and a punch holder fitted into the punch holder. The punch attached to the ram so as to face the die and the notch formed on the outer periphery of the punch so that the punch holder is vertically movably inserted into the punch holder so that the punch moves downward. A lock pin that is engaged with the notch and locks the punch to the punch holder, a biasing unit that biases the lock pin in a downward direction, and a lock pin that is installed outside the ram and that moves to the retracted position. When it is driven, it is lifted up and its tip abuts against the lock pin itself or the link mechanism connected to the lock pin located above, and the lock pin resists the biasing force of the biasing means. The punch is locked and unlocked in a forging machine, which is provided with a lock pin lifting device that moves upward, and the lock pin is released from the cutout portion of the punch by this upward movement to unlock the punch. apparatus. 2. The lock pin is inserted vertically into the punch holder from the upper surface of the punch holder and moved downward so that the lower end of the lock pin is engaged with the notch of the punch. One end of the upper end of the punch holder is pivotally attached to the upper part of the punch holder, and the upper end of the link is connected to the link arranged on the upper part of the punch holder so as to cross the upper end of the lock pin. Pivotally attached to the link of a link mechanism composed of a link tilting rod arranged so as to hang downward from the side of the punch holder,
The biasing means in the downward direction of the lock pin is constructed by inserting a coil spring between the lower surface of the punch holder and the lower portion of the link tilting rod, and the lock pin upward moving device is driven. Causes its tip to abut against the lower part of the link tilting rod located above and push up the rod against the urging force of the coil spring, and this push-up causes the link to tilt upward with the pivotally attached part at one end as the fulcrum. The locking and unlocking device of the punch in the forging machine according to claim 1, wherein the lock pin is moved upward by this tilting so that its lower end is disengaged from the notch of the punch. 3. The lock pin is formed with a recessed portion at a predetermined position on the circumferential surface over a certain length in the axial direction, and the lock pin is formed so that the lower portion thereof projects below the punch holder. The punch holder is vertically inserted into the side portion of the punch holder so as to be engageable with the cutout portion, and by moving downward, the peripheral surface above the recessed portion is engaged with the cutout portion of the punch. Further, the urging means in the downward movement direction of the lock pin is configured by inserting a coil spring between the lower surface of the punch holder and the lower portion of the lock pin, and by driving the lock pin upward movement device, The tip of the lock pin abuts against the lower end of the lock pin located above to move the lock pin upward against the biasing force of the coil spring, and by this upward movement, the recessed portion of the lock pin is aligned with the cutout portion of the punch. The lock pin The lock and unlock device for a punch in a forging machine according to claim 1, wherein the punch lock and unlock device is configured to be disengaged from a notch portion of the punch.