JPS6048300A - Punching method and device thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punching device, and particularly to a punching device for punching a plate material, such as a synthetic resin plate or a composite plate of paper and synthetic resin plate, which is inferior in rigidity to a metal plate.

For cards such as cash cards and credit cards, the unit section (1) corresponds to one of these cards.

(1) are punched out from an original plate (A) (Fig. 1) in which a large number of sheets (1) are arranged vertically and horizontally. This original plate is shown in Figure 2.
It has a three-layer structure consisting of a middle layer (121) made of paper or a soft vinyl chloride sheet on which many printed parts corresponding to the unit sections are printed, and an outer layer (131, (+41) welded to both the front and back sides of the middle layer (121). The rigidity is inferior.

For this reason, conventionally, each unit section (1) is punched out from the original plate (A) using a hollow blade (2) as shown in FIG. 3 to produce the product (B).

However, when punching using this hollow die blade (2), it is troublesome to remove the product (B) from the hollow die blade (2), and moreover, the hollow die blade (2) and its tip are The durability of the base plate (21) that partially bites in is insufficient, and when a certain number of punches are punched out, it is necessary to resharpen or modify the hollow mold blade (2) and replace the base plate 011.

On the other hand, another type of punching device is shown in FIG.
There is a combination of a punch (3) and a die (4), and if this is adopted, the disadvantages of using the hollow blade described above can be overcome.

This is because the punch (3) and the die (4) have sufficient durability, and the product (B) can be taken out from the product passage (41) on the die (4) side.

However, in this case, the punching process is difficult.

(2) is insufficient, and as shown in FIG. 6, there is a significant burr and the sheared surface 01) is also noticeably uneven.

Since the original plate (A) has the three-layer structure described above and its rigidity is inferior to that of a gold-layer plate, etc., at the beginning of the punching process, as shown in Figure 5, the part corresponding to the unit section (1) is dice(
4) This is because it bends in a convex shape toward the side and is sheared in this state.

An object of the present invention is to prevent the punched part from bending during the shearing process, in order to improve the finish obtained by punching using a combination of a punch and a die.

The first invention to solve the above problem is (3) to shear the peripheral edge of the punched part while adhering it to the punch side.

According to the invention of the first method, the part to be punched out in the punching process is sheared while being attracted to the end face of the punch, that is, while not maintaining a right angle to the local end side (blade part) of the punch. becomes. Therefore, the punching process (shearing process) proceeds under the same conditions as for a plate made of a highly rigid material such as a metal plate.

Based on the effects of the above technical means, the present invention has the following unique effects.

Since the punched part is sheared while remaining perpendicular to the cutting tool, the sheared surface is approximately perpendicular to the plate surface, eliminating or extremely reducing burrs and improving the finish of the product. ” This is true even if the part to be punched out or the original plate side is a product.

Since the rounded and punched parts are not bent during the shearing process, the die dimensions are similar to the dimensions of the die, and this dimensional accuracy is improved compared to conventional ones with burrs. From this, the product aisle (41) as shown in Figure 3
This has the advantage that the movement resistance when the product passes through is reduced, allowing the product to move smoothly.

Next, to explain the technical means of the second invention, this technical means forms a concave part in the end face of the punch, provides an intake passage in the punch that communicates with the concave part, and provides the intake passage in the punch. is connected to the suction port of a suction device that suctions air in conjunction with the operation of the punch, and the suction device performs the suction operation during the shearing process of the punch.

” The technical means described in 1. interact as follows.

A workpiece plate is interposed between a die and a punch, and when the clamp device descends, the peripheral edge of the part to be punched is first compressed by the clamp and die, and then the end face of the punch comes into contact with the workpiece plate.

At this point in time, the suction device performs a suction operation to place the concave portion of the end face of the punch in a negative pressure state, and the part to be punched is attracted to the end face of the punch.

Therefore, even after the edge of the punch begins to bite into the workpiece plate, that is, after the start of new cutting, the part to be punched does not bend toward the die and remains in close contact with the edge of the punch. Shearing action progresses.

After the shearing process is completed, the suction operation of the suction device is stopped and the punch returns to its initial state.

Based on this effect, the second invention has the following unique effects.

Since the suction device performs suction operation only during shearing, the punched portion is easily separated from the punch after shearing is completed, and is reliably transferred to the die side. Therefore, there is no problem in that the punched material rises with the punch and is punched out twice.

Further, since the negative pressure portion is formed only on the end face of the punch, the suction portion can be kept to the minimum necessary, and the capacity of the suction device can be small. Therefore, hit υ ■ 馨 SET 滝汰し; ten axes Jru 1 memorize 1 monument f r? ←↓↓I- Can also be used for small-sized parts.

Hereinafter, details of embodiments of the present invention will be described based on the drawings.

The apparatus of the embodiment shown in FIGS. 7 to 10 includes a punch (3)
This machine has a punching device consisting of a die (4) and a die (4), and the original sheet (A) is intermittently fed into this punching device, and the punch (3) performs a punching operation when the original sheet (5) is stopped.

In this embodiment, the die (4) and the cylinder (31) for pressing the periphery of the punched part are 1lff as in the conventional case.
The clamp 01) is connected to the output shaft 1321K of an air cylinder (6) that drives the punch (3) up and down. Unit sections +11, +11 arranged perpendicular to the feeding direction in (A)
The same number of devices are installed in parallel. Therefore, one operation of these punching devices punches out the rows of unit sections tl+, +11 at once.

The end face of each punch (3) has a concave groove (
is disposed around the end surface near the periphery, and further, the middle of the long side thereof is connected by an intermediate groove.

The bottom (34) of this groove has a large number of openings Q5i, (
35] are open, and each of these openings is communicated with an intake passage inside the punch (3). This intake path (3
The other end of 6) is connected to the suction device (5) through the flexible tube (51) from the connection port (371) provided on the output shaft. One may be provided as a.

This suction device employs a device that generates negative pressure, that is, suction force, by supplying air.
A predetermined negative pressure (air suction force) is generated. (Fig. 8) The suction device is already known as a vacuum pump with an ejector, but according to this suction device, when the air cylinder (6) is used to drive the punch, the driving source can be shared. .

Next, the operation timing of the suction device (5) needs to be related to the operation of the punch (3), but on the downstream side of this actual IQ+, the air cylinder (
6) and the output from the control device (7) that controls the output shaft (3).
The output from the detection device (8) that detects the lowered position of the device 21 is input to the AND circuit (9), and this output causes the suction device +51 f! : I'm trying to make it work. (10th
(Fig.) Therefore, there is an output signal from the control device (7) indicating that the punch (3) is in the descending driving state, and the output shaft (goods), that is, the punch (3) has descended below a certain position (shear processing starts). There is an output from the AND circuit (9) only when the detection device (8) produces an output signal indicating that the temperature has fallen below the point (15), which causes the suction device 15) to operate.

The control device (7) is an air cylinder (6).
The vertical drive changeover switch can be used as is, and a combination of the optical switch ff11 and the mark (2) provided at a predetermined position on the output shaft G21 can be used as the detection device (8).

Usually 1. The shearing process using this punching device.

Since the process is completed in a very short time (about 1 second), it is also possible to adopt a configuration in which the suction device @ (5) is operated only at the moment when the punch (3) enters the shearing machine 6.

In addition, the suction device (5) is used only during the downward movement of the punch (3).
You can make it work, and the configuration for this is as follows:
The position of the punch (3) relative to the original plate (A) 1 or the die (4) is detected directly or indirectly, and the signal at this time is used to stop the operation of the suction device (5) and start lowering the punch (3). The suction device (5) may be started by a signal from a changeover switch for controlling the air cylinder (6) at the time.

Note that various other known devices may be employed as the operation timing setting device for the suction device (5).

For example, as shown in Figure N, a disc-shaped crank (61
) can be used to raise and lower the punch (3) completely by providing a cam part (62) on the periphery of the crank (61) and making the switch 541 for controlling the suction device correspond to the cam part (62).

This switch is connected to a solenoid valve inserted into the air supply circuit of the suction device (5), and the cam part (62) closes the switch 64) within a certain range before the lowest position of the punch (3). All you have to do is make it happen. This is because during this time, the electromagnetic valve is opened and the suction device (5) performs the suction operation.

In addition, in this case, the base (10) with multiple punches +3) and t3) attached to one crank (61)
a guide post (10a) that is raised and lowered by
(10b), and one switch 6
4) to control all the suction devices (5).

Furthermore, in the embodiment 1, the transfer device includes a pulse motor (15) that operates intermittently, and a clamp claw (1) screwed into a feed screw (16) that is rotationally driven by the pulse motor (15).
A combination with η is adopted.

The rear end of the original plate (A) is held between the clamp claws (17),
・It is made to move in a straight line depending on the amount of operation of the electric smoker (15). That is, unit sections +11 and fi+ are sequentially fed below the punch (3). In addition, in this embodiment, the product passage (41) is arranged so that the product (B) can continue in a stacked manner within the product passage (41), in other words, so that the posture of the product (B) within the product passage is not disturbed. 4
U whose cross section of 1) almost matches the planar shape of product (B)
In addition to arranging the product passageway (1) into a circular arc shape, a back-up arm (Aη) that is swingable along the product surface iiRf4]IK is inserted into the product passageway from the lower end opening. This backup arm (42) has its fulcrum shaft (44) connected to the product passageway (41).
The arc-shaped portion (43) on the tip side is configured to have the same curvature as the arc of the product path, so that the arc-shaped portion (43) is positioned at the center of the arc of the product path (41). This means that you can move around.

The sleeve (4m) is a rotating partner of the back arm (42) with the fulcrum shaft (44), and the back-up arm (421) is designed to provide a predetermined rotational resistance to the fulcrum shaft. This allows for so-called free-stop operation, in which the device swings depending on the situation, but does not move due to its own weight.

As a configuration for this purpose, as shown in Fig. 12, the fulcrum shaft (
A configuration can be adopted in which the pair of support rods (4x-, (49) are pressed against the sleeve (49) with a predetermined pressure contact force) (46+).

Therefore, although a vacuum pump with an ejector is used in each of the embodiments, it is also possible to use other vacuum pumps, or alternatively, to use a negative pressure tank connected to the vacuum pump as the air suction source.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an original plate (A) to be considered for carrying out the present invention, FIG. 2 is an enlarged cross-sectional view of the main part thereof, and FIG. Fig. 4 is an explanatory diagram of the conventional example, Fig. 5 is an explanatory diagram of the shearing process according to the conventional example of Fig. 4, Fig. 6 is an explanatory diagram of the sheared end surface in this case, and Fig. 7 is a detailed diagram of the present invention. Explanatory diagram, No. 8
The figure is an explanatory diagram of the intake device (5). Fig. 9 is a perspective view of the end face of the punch, Fig. 10 is a block diagram for setting the operation timing of the suction device @ (5) in the embodiment of the present invention, and Fig. 11 is a sectional view of another embodiment. 12th
The figure is an explanatory diagram of the fulcrum shaft (44), and (A)...
... Original board (1) ... Unit section (3) ...
... Punch (4) ... Dice (5) ...
...Suction device (33) ... Concave groove ■ ...
...Intake path agent Yoshihiro Sakagami, patent attorney s3 Figure 2 Figure 1 Figure 5 Figure 6111 Figure 4

Claims (2)

[Claims] (1) A punching method in which a predetermined shape is punched out from an original plate using a bonder and a die, and the circumference R is sheared while the part to be punched is adsorbed to the bonder side. (2) In punching a predetermined shape from an original plate using a punch and a die, a recess is formed on the end face of the punch, and an intake passage communicating with the recess is provided in the punch, A punching device, wherein the suction passage is connected to a suction port of a suction device that sucks air in conjunction with the operation of the punch, and the suction device performs a suction operation during the shearing process of the punch.