JPH0715616Y2 - Press die with indexing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is provided with an indexing device, and the indexing operation of the indexing device allows the workpiece to be processed while being rotated by one pitch at a time. The present invention relates to a press die with an indexing device.

(Prior Art) For example, in a drum type clothes dryer, a large number of small holes 1a for taking in warm air are formed in the back plate of the drum as shown in FIG. The small holes 1a of the back plate 1 are formed by a punching process of a press, but since the space between the small holes 1a is quite small, when the small holes 1a are punched by a single pressing process, the press die is pressed. The intervals between the die holes and the punch pins in step 1 are very narrow, and as a result, the strength of the mold is reduced and there is a risk of damage.

In order to solve this problem of breakage, conventionally, when the small holes 1a are divided into rows arranged in the radial direction of the back plate 1, for example, the die holes and punches are provided corresponding to the small holes 1a every two rows. A pin is provided and the back plate 1 is moved to the 4th position by a manually operated indexing device.
The punching is performed while rotating by one pitch shown by an angle α in the figure. That is, by the first machining, the small holes 1a in the row shown by A in FIG. 4 are punched out, and then the indexing device is manually operated to rotate the back plate 1 by one pitch and the second machining is performed. The small holes 1a in the row indicated by B are punched out, and then the back plate 1 is manually rotated again by one pitch to punch the small holes 1a in the row indicated by C, whereby the punching of all small holes 1a is completed. It is a thing. However, this requires manual operation of the indexing device one by one, which is troublesome and inferior in productivity.

Therefore, it is conceivable that the indexing device is driven by a motor or a hydraulic cylinder so that the back plate 1 can be automatically indexed. In this case, a drive source dedicated to the indexing device is provided. This is a cost disadvantage.

(Problems to be solved by the invention) If the indexing device provided in the press die is configured to be driven by a motor or hydraulic cylinder, the drawbacks of manual operation can be solved, but There is a problem that a drive source dedicated to the indexing device is required, and the manufacturing cost of the press die as a whole becomes high.

Therefore, an object of the present invention is to provide a press die with an indexing device, which can automatically drive the indexing device, does not require a drive source dedicated to the indexing device, and can reduce the manufacturing cost. There is.

[Construction of the Invention] (Means and Actions for Solving Problems) The press die with the indexing device of the present invention is provided with a rotatable indexing plate, and the work material is integrated with the indexing plate. A fixed die that is set to rotate and a movable die that is provided so as to reciprocate in the contact and separation directions with respect to the fixed die and that cooperates with the fixed die to process a workpiece are provided. A gear part having a large number of teeth formed in the circumferential direction is provided on the indexing plate, and a slider is provided on the fixed die so as to reciprocate in the direction along the rotation direction of the indexing plate. Is provided with a transmission mechanism for converting the reciprocating movement into a reciprocating motion, and the slider is provided with a feed pawl rotatably so as to be engaged with and disengaged from a tooth of the gear part, and the locking pawl is engaged with the tooth of the gear part by an elastic member. When the slider is moved forward in conjunction with the movement of the movable die in the direction of contacting the fixed die, the feed claws are moved so as to ride on the teeth and pass through the teeth to allow the slider to move forward. The feed pawls are engaged with the teeth to rotate the indexing plate in one direction when the slider moves back in conjunction with the movement of the mold away from the fixed mold. Further, the stopper mechanism is rotatably provided on the fixed mold so as to be engaged with and disengaged from the teeth of the gear portion, and the overrun prevention is urged by an elastic member in a direction to engage with the teeth of the gear portion. For preventing reverse rotation, which is rotatably provided on the fixed die so as to be engaged with and disengaged from the teeth of the gear part, and is biased by an elastic member in a direction to engage with the teeth of the gear part. The locking claw and a cam member that is provided on the slider and engages and disengages with the overrun prevention locking claw when the slider reciprocates. The overrun prevention locking claw is formed when the slider moves forward. The indexing board is rotated by a predetermined angle when the slider is returned, by being engaged with the cam member and rotated in a direction of releasing the engagement with the teeth of the gear portion against the elastic force of the elastic member. When it is released, the engagement with the cam member is released and the elastic force of the elastic member It is configured to rotate in a direction in which it engages with the teeth of the gear portion to stop the indexing plate rotated by the predetermined angle by engagement with the teeth, and the reverse rotation preventing locking claw is formed by the feed claw. When the indexing board rotates, it rides on the teeth of the gear and allows it to pass, and when the indexing board is rotated by a predetermined angle by the feed claws, it engages with the teeth of the gear and moves in the opposite direction of the indexing board. It is characterized in that it is configured to prevent the rotation of the.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. This embodiment is applied to a press die for punching a large number of small holes 1a on the drum back plate 1 shown in FIG.

First, in FIG. 3, reference numeral 11 denotes a fixed die, which is a die 13 attached to a holder 13 fixed to a bed 12 of a press via a spacer 14, and the center of the die 15 is A guide pin 15a fitted in the center hole 1b of the drum back plate 1 is provided in a protruding manner, and a large number of die holes 15b are formed so as to be radially arranged around the guide pin 15a. The die holes 15b correspond to the small holes 1a formed every two rows, for example, when all the small holes 1a finally formed on the drum back plate 1 shown in FIG. 4 are divided into rows arranged in the radial direction. ing. On the other hand, 16 is a punch type as a movable type attached to a ram (not shown) of the press, which is reciprocally moved by the ram in a vertical direction which is a contacting / separating direction with respect to the die type 15. The die 16 has a punch pin 16a projecting from the die hole 15b in a one-to-one relationship. 17 is a drum back plate 1 which is a work material and is placed on a die 15
This is an indexing device for rotating by pitch, and the indexing device 17 will be described below with reference to FIGS. 1 and 3.

That is, 18 is an annular indexing plate which is arranged on the outer periphery of the die die 15 so as to be flush with the die die 15, and which is the holder 13
It is rotatably supported by a bearing 19 provided on the. A guide pin 18a is provided on the upper surface of the indexing board 18, and when the drum back plate 1 is set in the die mold 15,
A positioning hole 1c formed in advance on the drum back plate 1 is fitted into the guide pin 18a. Further, an annular gear 20, which is a gear portion, is attached to the lower surface of the indexing board 18, and a large number of teeth 20a are formed on the outer peripheral portion of the gear 20. Reference numeral 21 denotes a guide member attached to the holder 13, in which a slider 22 is reciprocally inserted and supported in a direction along the rotation direction of the indexing plate 18, that is, along the tangential direction of the gear 20. 22 is constantly urged in the direction of arrow D by a compression coil spring 23. And the slider
A roller 25 is rotatably supported by a shaft 26 in an elongated hole 24 formed in 22, and a cam projection 27 having an inclined surface 27a on its side surface is attached downward to the punch die 16. There is. The roller 25 and the cam protrusion 27 constitute a transmission mechanism 28 for converting the vertical reciprocating motion of the punch die 16 into the lateral reciprocating motion of the slider 22 and transmitting the converted motion.
As will be more apparent from the description below, when the punch die 16 descends and rises, the slider 22 reciprocates by the cam protrusion 27 contacting and separating from the roller 25 through the insertion hole 29 formed in the upper surface of the guide member 21. Is configured to work. Reference numeral 30 is a feed pawl rotatably attached to the slider 22 by a shaft 31, which is a compression coil spring 32 as an elastic member.
Is urged to rotate in the direction of arrow E by the
It is engaged with 20a. Then, when the slider 22 moves in the direction opposite to the arrow D, the feed claw 30 is disengaged from the tooth 20a, gets over the tooth 20a, and the slider 22 moves in the direction D. In this case, the tooth 20a is engaged with the tooth 20a to press the tooth 20a, and the gear 20 and thus the indexing board 18
Is rotated in the direction of arrow F. Reference numeral 33 is a stopper mechanism composed of a locking claw 34 for preventing overrun and a locking claw 35 for preventing reverse rotation. This stopper mechanism is rotated by the feeding claw 30 in the direction of arrow F when the indexing plate 18 is rotated by a predetermined angle. The rotation of the board 18 is stopped by the locking claws 34 for preventing overrun, and the reverse rotation of the indexing board 18 is prevented by the locking claws 35 for preventing reverse rotation, whereby the indexing board 18 is held at the stopped position. To do. That is, both locking claws 34 and 35 are rotatably supported by the holder 13 via the shaft 36, and
The coil springs 37 and 38, which are elastic members, are urged to rotate in the directions of arrow G and arrow H, respectively. The locking claw 34 for preventing overrun is always provided with the teeth 20 of the gear 20.
When the slider 22 moves in the direction opposite to the arrow D while the gear 20 is engaged with the gear 20 to prevent the gear 20 from rotating in the arrow F direction, the substantially L-shaped engagement as a cam member attached to the slider 22 is performed. The tip inclined surface 39a of the releasing cam member 39 is slidably contacted (engaged) with the pin 34a provided on the upper surface of the overrun preventing locking claw 34 to rotate the locking claw 34 in the direction of the counter arrow G. False tooth 20a
The engagement with is to be released. On the other hand, the anti-reverse locking pawl 35 is always fitted into the tooth groove 20b of the gear 20 (engaged with the tooth 20a) to hold the gear 20 and thus the indexing board 18 at the stop position, and the gear 20 moves in the arrow F direction. When it rotates in the direction, it rotates in the direction opposite to the arrow H to allow the tooth 20a to pass in the direction of the arrow F.

Next, the operation of the above configuration will be described. First, the drum back plate 1 is arranged so that its center hole 1b is inserted into the center guide pin 15a of the die die 15 and the outer peripheral side positioning hole 1c is inserted into the guide pin 18a of the indexing board 18. Set on die 15 (see Fig. 3). Thereafter, when the press is operated, the punch die 16 is lowered by a ram (not shown). As the punch die 16 descends, the cam protrusion 29 enters the elongated hole 24 of the slider 22 from the insertion hole 29 of the guide member 21,
Since the roller 25 is lowered while pressing the roller 25 on the inclined surface 27a, the slider 22 moves in the direction opposite to the arrow D against the spring force of the compression coil spring 23. Then, the feed pawl 30 rotates in the direction opposite to the arrow E direction against the spring force of the compression coil spring 32, and the tooth 20a is rotated.
As shown in FIG. 2, the disengagement cam member 39 moves in the direction opposite to the arrow D while pressing the pin 34a of the overrun prevention locking pawl 34 with its inclined surface 39a (forward). Therefore, the locking claw 34 rotates in the direction opposite to the arrow G against the spring force of the tension coil spring 37, and the engagement with the tooth 20a is released. Then, in the process of the punch die 16 descending to the lowest position, the punch pin 16a of the punch die 16 and the die die 1
The small holes 1a in the row indicated by A in FIG. 4 are punched in the drum back plate 1 in cooperation with the die holes 15b of the number 5. At the time of punching out the small hole 1a, the overrun prevention locking claw 34 is disengaged from the tooth 20a.
By maintaining the fitted state with b, the rotation (reverse rotation) of the gear 20 in the direction opposite to the arrow F is prevented, and the gear 20 and thus the indexing board 18 are kept in a stopped state.

After the punching of the small holes 1a in the row A is completed in this way, the punch die 16 moves up. As the punch die 16 rises, the cam protrusion 27 separates from the roller 25, so that the slider 22 is moved (returned) in the direction of arrow D by the spring force of the compression coil spring 23. Then, the feed claw 30 has teeth 20
Since the gear 20 and the indexing board 18 are rotated in the direction of the arrow F by engaging with and pressing the a. With the rotation of the indexing board 18, the reverse rotation preventing locking claw 35 rides on the tooth 20a while rotating in the direction of the counter arrow H against the spring force of the tension coil spring 38, and one Tooth 20a is locking claw 3 for preventing overrun
After passing through 4, the inclined surface 3 of the engagement releasing cam member 39
9a is separated from the pin 34a of the locking claw 34 for preventing overrun, so that the locking claw 34 falls into the tooth groove 20b of the gear 20. Then, when the indexing plate 18 is rotated by a predetermined amount, that is, by one pitch shown by an angle α in FIG. 1, by the feed claw 30, the overrun preventing locking claw 34 engages with the tooth 20a, and thus the gear 20 and by extension. The rotation of the indexing board 18 is stopped, and the locking claw 35 for preventing reverse rotation
Fits in the tooth groove 20b and holds the gear 20 and thus the indexing board 18 at the stopped position. In this way, the index board 18 is 1
When the punch piece 16 is rotated by the pitch, the punch piece 16 is lowered by the ram, and by the lowering of the punch die 16, the slider 22 is moved in the direction opposite to the arrow D in the same manner as described above, and the feed claw 30 is moved by the tooth.
Overrun with one 20a and locking claw 3 for preventing overrun
The engagement releasing cam member 39 rotates the member 5 in the direction opposite to the arrow G to release the engagement with the tooth 20a. Then, the process in which the punch die 16 descends to the lowest position is shown in FIG.
The small holes 1a in the row indicated by are punched. After punching the small holes 1a in the row B, the punch die 16 rises, so that the slider 22 moves in the direction of arrow D by the spring force of the compression coil spring 23 in the same manner as described above, and the gear 20 is moved by the feed pawl 30. When it is rotated in the direction of arrow F and is rotated by one pitch indicated by angle α in FIG.
The rotation of the gear 20 and thus the indexing board 18 is stopped by engaging with a and the reverse rotation preventing locking claw 35 is fitted in the tooth groove 20b, whereby the gear 20 and thus the indexing board 18 are brought to the stopped position. Retained. After this, the punch die 16 descends again to punch the small holes 1a in the row indicated by C in FIG.
Rises. By the lowering and raising of the punch die 16, the gear 20 and thus the indexing plate 18 are rotated by one pitch in the direction of arrow F. Then, when the small holes 1a in the row indicated by C in FIG. 4 were punched, all the small holes 1a were punched in the drum back plate 1, and accordingly, the small holes 1a in the C row were punched. After that, the drum back plate 1 is removed from the die mold 15, and the next drum back plate is set in the die mold 15.

As described above, according to this embodiment, since the indexing device 17 is automatically indexed by using the reciprocating motion of the punch 16, the troublesome manual operation is not required. The property is improved. Moreover, since a drive source dedicated to the indexing device 17 is not required, the manufacturing cost of the press die as a whole can be kept low. Further, since the small hole 1a is punched when the punch die 16 descends, the indexing board 18 is stopped when the punch die 16 descends, and the indexing board 18 rotates when the punch die 16 rises. However, since the indexing operation is performed in conjunction with the up-and-down reciprocating motion of the punch die 16, the timing can be easily set. Besides, the gear by the feed claw 30
Since the rotation of the arrow F in the direction of arrow F is stopped by the locking claw 34 for preventing overrun, the indexing board 18 that tries to continue rotating due to inertia can be forcibly stopped, and the indexing board 18 can be indexed. The rotation angle can be set accurately, and when the punch die 16 descends, the slider 22 moves in the direction opposite to the arrow D, and along with this, the feed claw 30 slides in contact with the tooth 20a and moves in the same direction to move the gear 20. However, since the gear 20 and hence the indexing board 18 are held in a stopped state by the reverse rotation preventing pawl 35, the indexing board 18 is punched when the small hole 1a is punched.
There is no risk of movement of the small hole 1a, and the small hole 1a can be punched into the regular position in the drum back plate 1 without displacement.

In the above embodiment, the gear 20 is formed separately from the indexing board 18, but this is formed by forming teeth on the outer peripheral portion of the indexing board 18.
The gear and the gear 20 may be integrated. Further, in the above-mentioned embodiment, the present invention has been described as being applied to the case where the small hole 1a is punched in the drum back plate 1, but the present invention is not limited to this, and the workpiece is processed by the indexing operation of the indexing device. The present invention can be widely applied and practiced in the case of press working while rotating by 1 pitch at a time.

[Effect of the Invention] As is apparent from the above description, according to the press die with the indexing device of the present invention, the indexing device can be automatically indexed by utilizing the reciprocating motion of the movable die. Therefore, the productivity is improved, the drive source dedicated to the indexing device is not required, and the manufacturing cost can be reduced. Moreover, when the slider is moved back, the indexing plate is rotated by a predetermined angle,
The overrun prevention locking pawl engages the gear teeth to forcibly stop the indexing disc that tries to continue rotating due to inertia, and the feed pawl slides on the gear teeth when the slider moves forward. Even if an attempt is made to rotate the gear part in the opposite direction by moving the contact part, the reverse rotation preventing engagement claw engages with the teeth of the gear part to prevent the reverse rotation, so that the processing position for the workpiece is displaced. This has an excellent effect that the press work can be performed at a regular position without fear.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, and FIG. 1 (A) is an enlarged plan view of an essential part showing a partially cutaway view.
1B is a partially cutaway front view taken along the line I-I of FIG. 1A, and FIG. 2 is an enlarged plan view of an essential part shown in a state different from that of FIG. 1A. FIG. 4 is a vertical sectional view showing a structure of a mold with a part thereof removed, and FIG. 4 is a plan view of a drum back plate as a material to be processed. In the figure, 1 is a drum back plate (workpiece), 11 is a fixed type, 15 is a die type, 16 is a punch type (movable type), 17 is an indexing device, 18
Indexing board, 20 is a gear (gear portion), 21 is a guide member, 22 is a slider, 25 is a roller, 27 is a cam protrusion, 28 is a transmission mechanism, 30
Is a feed claw, 32 is a compression coil spring (elastic member), 33 is a stopper mechanism, 34 is a locking claw for preventing overrun, 35 is a locking claw for preventing reverse rotation, 37 and 38 are tension coil springs (elastic member), 39
Is a disengagement cam member (cam member).

Claims (1)

[Scope of utility model registration request] 1. A fixed die, in which a work piece is processed while being rotated by one pitch, and an indexing board is rotatably provided so that the work piece is set so as to rotate integrally with the indexing board. And a movable die for processing a work piece in cooperation with a fixed die provided so as to reciprocate in the contacting and separating directions with respect to the fixed die, and a plurality of teeth provided in the indexing plate in the circumferential direction. A formed gear portion; a slider provided on the fixed die so as to reciprocate in a direction along the rotation direction of the indexing plate; a transmission mechanism that converts the reciprocating movement of the movable die into a reciprocating movement of the slider; Is rotatably provided so as to be engaged with and disengaged from the teeth of the gear part, and is urged to rotate by an elastic member in a direction of engaging the teeth of the gear part, and moves in a direction of contacting the fixed mold of the movable mold. When the slider that is linked to Rotate to pass through the teeth to allow the slider to move forward, and engage with the teeth of the gear to index when the slider moves back in conjunction with the movement of the movable mold away from the fixed mold. A feed pawl that rotates the board in one direction, and a stopper mechanism that holds the index board at that position when the index board that is rotated by the feed pawl is rotated by a predetermined angle, the stopper mechanism comprising: An overrun preventing locking claw that is rotatably provided on the fixed mold so as to be engaged with and disengaged from the teeth of the gear part, and is urged to rotate by an elastic member in a direction to engage with the teeth of the gear part, A locking claw for preventing reverse rotation, which is rotatably provided on the fixed mold so as to be engaged with and disengaged from the teeth of the gear part, and is biased by an elastic member in a direction to engage with the teeth of the gear part. Locking claws provided on the slider for preventing the overrun when the slider reciprocates The overrun preventing locking claw is engaged with the cam member when the slider is moved forward, and engages with the teeth of the gear portion against the elastic force of the elastic member. When the indexing disk is rotated in a direction to release the engagement and the indexing disk is rotated by a predetermined angle when the slider is moved back, the engagement with the cam member is released and the elastic member elastic force causes the teeth of the gear portion to disengage. Is configured to stop the indexing plate rotated by a predetermined angle by rotating in a direction to be engaged with the teeth and the reverse rotation preventing locking claw of the indexing plate by the feed claw. When it rotates, it rides on the teeth of the gear and allows it to pass, and when the indexing plate is rotated by a predetermined angle by the feed claws, it engages with the teeth of the gear and prevents the indexing plate from rotating in the opposite direction. A press die with an indexing device, which is characterized in that