JPS6072621A - Press die - Google Patents

Abstract

PURPOSE:To perform >=2 stages of operation with one die by providing a slide key which activates or inactivates a punch to the die and actuating automatically the slide key when the die operation attains a prescribed count number. CONSTITUTION:A slide key 10 which activates or inactivates a punch 8 is provided between a backing plate 2 and a punch plate 3 with a press die which can work at least >=1 point of separate shapes (a), (b) in the stage of working repeatedly switch contact points (c) having the same shape by automatic pressing. A ratchet rotating plate 12 which counts the number of die operations is also provided and when the die operation attains a prescribed count number, the slide key 10 is automatically actuated to activate or inactivate the punch 8. Then >=2 stages of operation are made possible with one press die by which workability is improved and the cost of the die is reduced.

Description

[Detailed Description of the Invention] The present invention relates to a press mold, and its purpose is to
When performing repeated shape machining, such as the machining of switch contacts using automatic press work, if at least one different shape machining is required, reduce the number of molds used or the number of parts of the mold used, and The goal is to reduce costs and shorten the mold production delivery time, as well as improve work efficiency.

FIG. 1 shows a contact point of a switch, which is an example of a part processed using the present invention. This part is basically a repeat of the 0-section shape, but the 0-section shape is cut by one out of every five pieces as shown by sections a and b. That is, four switch contacts C of the same shape are attached to the base d, and the next part is cut to form four switch contacts C of the same shape again. It is to be renewed.

Of course, when 12 pieces are used as a set, the next part of the 12th piece is cut. The conventional processing method for such parts is to first create a part with the same shape as the 0 part by press working, and then perform another press work or manual work to remove the unnecessary parts (part a, However, since this processing method required two steps, the yield rate was poor, and the processing cost, including the equipment costs for the mold and press machine bones, was high.

The present invention has been made in view of the vaporization issues, and the above-mentioned drawbacks have been solved by adopting the structure described below.

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

FIGS. 2 to 6 are sectional side views of essential parts inside the press mold.

In the figure, reference numeral 1 denotes a punch plate, and a punch holder 1 (not shown) is fixed to the ram surface of a press sliding portion. 2 is a backing plate, and the backing plate 2
There is a hole 2b for inserting the coil spring 11 on the side of the
A slide key 10 is slidably inserted into the lower surface, and is fixed to the punch holder 1. 3 is a punch plate that is fixed to the backing plate 2, and has a large diameter part 3a and a small diameter part 3b to accommodate the punch 8.
A hole 3c is provided to cut the side 1. Reference numeral 4 denotes a stripper plate, which is suspended from the backing plate 2 by a suspension bolt (not shown), and is in a state where it can move vertically. Further, a coil spring is inserted between the stripper plate 4 and the banking plate 2 (not shown). A die holder 7 is fixed to a part of the bolster (not shown) of the press machine. A backing plate 6 is fixed on the die holder 7. Through holes 7a and 6a are provided in the die holder 7 and backing plate 6 at positions corresponding to the front NQ punch 8, respectively. 5
is a die rate, and a die insert 9 is inserted and fixed at a position corresponding to the punch 8. Further, the die plate 5 is fixed on the banking plate 6. 12 is a ratchet rotary plate with a large number of tooth surfaces 12b (+tiii),
The ratchet rotary plate 12 also serves as a counter to count the number of press operations, and is connected to the cam 4 through the main shaft 13.
and the holder plate 17 so as to be rotatable. A stepped hole 12a is formed at a predetermined position of the ratchet rotating plate 12, and a push pin 15 is slidably inserted into the hole 12a. The push pin 15 is pressed against the cam plate 14 by a coil spring 16. A stopper pin 18 for determining the position of the slide key 10 is attached to the holder plate 17, and the holder plate 17 is mounted on the cam &14 in a circular manner. The cam plate 14 has a convex portion 14b facing the side surface of the ratchet rotary plate J2, and the ratchet rotary plate 120 entrance 1111.1 of the convex portion 141) has a ft-th slope 14a.
In other directions, the exit side vertical surface 14C1
It becomes. The cam plate 14 is fixed to a holding plate 19. The holding plate 19 is provided with a stepped hole 19a, and a stopper pin 20 is inserted into the hole 19a from above.
is slidably inserted. A coil spring 21 is inserted above the stopper pin 20 and sealed in the hole with a set screw 22. Therefore, the stopper pin 20 is always pressed downward by the coil spring 21. Further, the holding plate 19 is fixedly attached to the punch holder 1. Reference numeral 10 denotes a slide key, and its tip portion 10 is housed in a groove portion of the backing plate 2 while being guided by a sliding QJ function. Slide key 1
0 is always pushed outward of the backing plate 2 by the coil spring 11. 23 is a ratchet pawl, which is attached to the holder 25 by a support shaft 24 so as to be rotatable. Although not particularly shown, a stopper is attached to the holder 2 to prevent the ratchet pawl 23 from rotating more than a certain amount.
It is set in 5. Ratchet' pawl 23 and die holder 7
A coil spring 26 is inserted between them, and the ratchet pawl 23 is always pressed against the direction that rotates in the countertime direction. Furthermore, a seat 23b is provided on the ratchet pawl 23 and the die holder 7 to prevent the coil spring 26 from slipping. Further, the holder 25 is fixed to the die holder 7 and has several openings.

Next, the operation of the present invention will be explained. First, the member processed by the present invention is a general length material or a coil material. The process of automatically pressing this member into a continuous, identical shape is the same as a general press mold, but the punch is moved or immovable at a predetermined time "υ" inside the mold. This differs from a general press mold in that it has a mechanism 41 that creates a discontinuous shape. The operation of the mechanical parts that characterize this mold will be explained below. FIG. 4 is a state diagram in which the press 11 is closed with the press-E machine ram surface at the bottom dead center. In this state, Lacheso) +! ! 1 turning plate 1.2
The end surface 15a of the push pin 5 inserted into the cam plate 14 contacts the convex jf++14b, so the tip of the push pin 15 protrudes beyond the side surface 12a of the rotating board 12, and the end surface 10a of the slide key 10 is in contact with.

The slide key 10 is pushed by the coil spring 11 in the direction of being taken out from the banking plate 2, and the ratchet rotary plate 12 receives a force that causes it to rotate counterclockwise, but the stopper pin 20 prevents it from rotating beyond a certain position. It has become. At this time, the push pin 15 is not located directly above the figure, so the slide key 10 is pressed against the coil spring 1.
1, the lower surface 1 of the tip of the slide key 10 is retracted by
0b has not reached 1Δ of 80th punch. Therefore, since the punch 8 moves upward with the punch tip 8a in contact with the member A, the member A is not cut.

Next, when the upper ram surface of the press machine begins to rise and the mold gradually begins to open up and down, the ratchet rotating plate 12 also rises, and the tooth surface 12b of the ratchet rotating plate 12 comes into contact with the tip 23a of the ratchet pawl 23. Furthermore, as the ram surface continues to rise, the ratchet rotary plate 12's edge 12b becomes the ratchet pawl 2.
The ratchet rotary plate 12 is pulled downward while being hooked on the tip 23a of the ratchet rotary plate 12, and begins to rotate clockwise (in the direction of the arrow). At this time, the tip 23 of the ratchet pawl 23
a is constantly pushed in a direction (counterclockwise) to hook the cylindrical surface 12b of the ratchet rotary plate 12 by the coil spring portion. Further, since the end surface 15a of the push pin 15 is in contact with the convex portion 14a of the cam plate 14, the tip end 15b of the push pin 15 remains protruding from the 1ul1 surface 12a of the ratchet rotating plate 12. When the position of the push pin 15 moves due to the rotation of the ratchet rotary plate 12, the push pin tip 15b presses the slide key end surface 10a, and the slide key 10 gradually enters deeper into the groove 2a of the backing plate 2 (moving forward in the right direction in the figure). do). slide key 10
Since the tip 10c of the slide key 10 is sloped, when the slide key 10 moves forward in the right direction, the slide key 10 first contacts the punch end surface 8b, and when the slide key 10 moves further thereafter, the tip 10c of the slide key 10 contacts the punch end surface 8b. Go into the darkness with Backing Great 2 and move Punch 8 downward. Further, when the ratchet rotary plate 12 rotates, the stopper pin 20 comes into contact with the tooth surface 12b and moves up and down. In addition, in Section 6 1-, the ram surface of the press machine is at the highest position (
FIG. Then, when the press ram surface starts to descend again, the tooth surface 12b of the ratchet rotary plate 12 and the tip 23a of the ratchet pawl 23 are separated, and the slide key 10 is moved back by the coil spring 11 between the slide key 10 and the backing plate 2. The ratchet rotary plate 12 is subjected to a force that causes it to rotate counterclockwise, but the stopper pin 20 prevents the ratchet rotary plate 12 from rotating.

When the ram surface continues to descend in this state, the punch tip 8a comes into contact with the member A first. When the ram surface continues to descend further, the slide key 10 is now inserted between the punch end surface 8b and the backing plate 2, so the punch end surface 8b is pushed by the slide key lower surface 10b, and the member A is cut by the cutting edge of the punch tip. do. Figure 2 is a diagram of the state of the rack when the ram surface has dropped to the lowest point (bottom dead center) in this state.

Next, the ladle ram surface starts to rise, and the ratchet rotating plate 12
begins to rotate clockwise, the position of the push pin 15 held by the ratchet rotating plate 12 moves, and the push pin 1
The end surface 15a of the cam plate 14 falls one step lower than the convex surface 14b of the cam plate 14 and comes into contact with the lower surface 14CVC.

At this time, the tip f'fls15b of the push pin 15 is retracted from the 1 μm surface 12a of the ratchet rotary plate 12, so the end surface 10a of the slide key 10 loses its support and the coil no.
The punch 8 moves back to the point where it contacts the stopper pin 18, and the punch 8 loses its support as shown in FIG. In this state, even if the ram surface is lowered and the press is closed, the above-mentioned tracing member will not be processed. Further, when the press ram surface is turned up and down repeatedly, the ratchet rotary plate 12 rotates clockwise and the push pin 15 moves while bringing the end surface 15a into contact with the cam plate lower surface 14C, but the position of the slope 14a of the cam plate 4 When it reaches this point, the push pin end surface 15a moves while contacting the inclined surface 14a and reaches the convex surface 14b. For this reason, the tip of push pin 15! 1h1 part 15b also gradually changes to the ratchet rotating plate 1.
It begins to protrude from the side surface 1.2a of 2. In this way, the ratchet rotating plate 12 counts the number of vertical movements of the press ram surface.

In the above embodiment, adjustment is made so that the ratchet rotary plate 12 rotates by one tooth in one press stroke. In addition, processing is performed with the punch in a movable state once every 12 strokes of the press up and down.

FIG. 7 shows another embodiment of the present invention, in which the solenoid 35 is electrically turned ON in response to the operation of the press.
By turning OFF, the system slide key 10 is advanced to the upper position of the punch 8 or retreated to make the punch 8 movable or immovable to control whether processing is performed or not, and has the same effect as the above embodiment. Of course, it belongs to this case. In this case, the number of mold operations (the number of vertical movements of the press ram surface) is not particularly shown, but the number of openings and closings is controlled by a switch that turns 1 ON or OFF when the punch holder 1 is lowered or raised. is counted, and when the predetermined number of times is reached, the solenoid 35 is
It is better to do oJ or OFF J.

In addition, in the same figure, 34 is a pin that connects the slide key 10 and the plunger 35alH; 6 is a solenoid 35
The mounting plate 36 is attached to the punch holder 1.

As described above, the present invention provides a slide key 10 between the banking plate 2 and the punch plate 3 for turning the punch 8 into a movable state or an immovable state, as well as a counter for counting the number of mold operations. When the number of counts reached a predetermined value, the slide key 10 was automatically operated to make the punch 8 movable or immovable.
It is possible to perform two or more processes with one press, greatly improving work efficiency, and reducing mold costs and operating costs for the press machines.

[Brief explanation of the drawing]

Figure 81 is an external shape diagram of a part processed using the present invention;
Figures 2 to 6 show examples of the press mold of the present invention,
Fig. 2 is a cross-sectional side view of the mounting part showing the punch 8 moved one step, Fig. 3 is a top view of the same sectional view, Fig. 4 is a main part showing the punch 8 in an immovable state, and Fig. 5 The figure is a cross-sectional top view of the same, Figure 6 is a cross-sectional side view of the mounting part showing the state where the ram surface is raised to the maximum position, and Figure 7 is a main part 1υ showing another embodiment.
It is a side view. 2... Backing plate 3... Punch plate 8... Punch 10... Slide key 12... Ratchet rotary plate patent applicant Alps'Tunkei Co., Ltd.

Claims (1)

[Claims] In automatic press processing, at least 1
In a press die that can process different shapes in more than one place, a slide key is provided between the backing plate and the punch plate to set the punch in a movable or non-movable state, and a counter is provided to count the number of die movements. A press mold characterized in that when the mold movement reaches a predetermined count, the slide key is automatically operated to change the state of the punch to a movable state or a non-movable state.