JPH0123612Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to prevention of bending of a corrugated steel plate during bending of a press die.

Conventionally, there have been devices of this type as shown in FIGS. 1 to 3. FIG. 1 is a front view of a conventional follow-up device before processing, FIG. 2 is a side perspective view thereof, and FIG. 3 is a front view of the conventional follow-up device during processing. In the figure, 1 is a press ram (ram, a device for breaking), 2
a and 2b are bending punches (punching tools), 3
a and 3b are dies (molds used for cutting with a press etc.), 4 is a press bed, 5a and 5b are limit switches for cylinder operation, 6 is the main body of the trolley, 7 is a workpiece, a steel plate with a corrugate, and 8 is a Rising bed, 9 is cylinder, 10 is rising arm, 10a
is a fulcrum, and 11 is a guide. In the apparatus shown in FIG. 1, the state in which the press ram 1 is lowered and the corrugated steel plate 7, which is the workpiece, is being processed at the bottom dead center is shown in FIG. Figure 4 shows the corrugated steel plate 7 of the workpiece after the machining operation shown in Figure 3 above.
Fig. 4a is a plan view of the state, Fig. 4b is a plan view of the state.
is its front view.

Next, the operation will be explained. By lowering the press ram 1, the limit switch 5 for cylinder operation is activated.
When a is activated, the lifting arm 10 attached to the cylinder 9 using the fulcrum pin 10a as a fulcrum slides up on the lower surface of the lifting bed 8 as the press ram 1 descends, and lifts the steel plate 7 with the corrugated workpiece. Follow the instructions to complete the bending process. At that time, when the cylinder operating limit switch 5b attached to the press ram 1 is actuated, the press ram 1 rises and at the same time the raising bed 8 follows and returns to its original position.
The corrugated steel plate 7, which is the bent workpiece, remains on the rising bed 8.

As explained above, as can be seen in Figures 1 to 3, the conventional device is complicated because it consists of multiple devices, and is therefore expensive, and it is difficult to place the follow-up device. The disadvantages are that it requires a large installation area and that it takes time to balance bending and tracking.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and the die 3a, 3b
A protruding cam is provided at the upper end of the closer arm, and a pair of cam-equipped arms 21a, 21b, 21c, 2
1d, and by using a cylinder with a roller at the tip, punches 2a, 2b and cam punch 2
Since the cylinder 26 follows the cam-equipped arms 21a, 21b, 21c, and 21d when the cam-equipped arms 21a and 20b move up and down in conjunction with each other, the cam-equipped arms 21
The cams a, 21b, 21c, and 21d can move up and down in a straight line, and can be manufactured at low cost. Adjustment is also easy, and it does not take up much space to install. It can be easily adjusted using the adjustment plate 23 attached to the arm 7 with the cam. The purpose is to provide a device that can.

An embodiment of this invention will be described in detail below with reference to the drawings. FIG. 5 is a front view showing an embodiment of this invention, showing the state of the follow-up device incorporated in the mold before processing. 6 is a vertical sectional view at the center of the device of FIG. 5, and FIG. 7 is a plan view of the device of FIG. In each figure, the same symbols as the conventional ones indicate the same or equivalent parts, 20a and 20b are newly provided cam punches, 21a, 21b, 21c and 21d are arms with cams, 22 is a pin, 23 is an adjustment plate, and 24 is an adjustment screw. , 25 is a roller, and 26 is a cylinder. Arms with cams 21a, 21b, 21, respectively
When c and 21d are pushed by the lowering of the press ram 1, the cammed arm 21 is moved around the pin 22.
a, 21b, 21c and 21d are raised by rotational movement. When the bending work is finished and the ram 1 rises, the cylinder 26 is used to prevent the workpiece corrugated copper plate 7 from falling suddenly.
The rotation of the cam-equipped arm is followed by the roller 25 attached to 6. The operation of the follow-up device incorporated into the mold made of the above-mentioned members will be explained.

As the press ram 1 lowers, the cam punches 20a and 20b simultaneously lower the bending punches 2a and 2b attached to the press ram 1, and the bending punch 2
A, 2b and bending dies 3a, 3b bend a steel plate 7 with a corrugated workpiece. At the same time, the arms with cams 21a, 21b, 21c and 21d support the steel plate 7 with the corrugated workpiece, while
The bending process is completed by following the pin 22 around the line. Adjustment of the deviation or bending angle at this time is performed using the adjustment plate 23 and adjustment screw 24. When the cylinder operating limit switch 5c is actuated at the same time as the bending and tracking are completed at the bottom dead center, the cylinder 26 rises and the roller 25 moves toward the cam-equipped arms 21a, 21.
b, 21c and 21d by sliding and supporting them while rotating. FIG. 8 is a diagram of this state. When the ram 1 reaches the top dead center, the cylinder operating limit switch 5d is actuated, the cylinder 26 is gently lowered, and the corrugated steel plate 7, which is the workpiece, remains on the cam-equipped arms 21a, 21b, 21c, and 21d. .

In the above embodiment, the configuration diagram of the corrugated steel plate 7 as the workpiece is shown, but the workpiece may be any bent material with long bends.
This embodiment has the same effect as the above embodiment.

As described above, according to this invention, the dies 3a, 3
A protruding cam is provided at the upper end of the arm near b,
A pair of cam arms 21a, 21b, 21c,
21d, and by using the cylinder 26 with a roller at the tip, the bending angle of the workpiece 7 can be adjusted and the cam of the cam arm moves up and down in a straight line between the top dead center and the bottom dead center, making the device simple. This has the effect of reducing costs by integrating the system into one unit, simplifying adjustment work, and requiring less installation space than conventional systems.

[Brief explanation of drawings]

Figure 1 is a front view of the conventional follow-up device before processing, Figure 2 is its side view, Figure 3 is a front view of the conventional follow-up device during processing, and Figure 4 is the machining of a corrugated steel plate as a workpiece. Figure 4a is a plan view showing the shape after completion;
Fig. 4b is a front view, Fig. 5 is a front view of the following device built into the mold according to this invention before processing, and Fig. 6 is a view perpendicular to the plane of the paper at the center of the following device in Fig. 5. 7 is a plan view of the following device shown in FIG. 5, and FIG. 8 is a front view showing the operating state of the following device shown in FIG. 5 during processing. In the figure,
1...Press ram, 2a, 2b...Bending punch, 3
a, 3b...Die, 4...Press bed, 5a, 5
b, 5c, 5d...Limit switch for cylinder operation, 6...Car chassis body, 7...Workpiece material: steel plate with corrugate, 8...Rising bed, 9...Cylinder, 10...Rising arm, 10a...Fulcrum pin, 11...Guide, 2
0a, 20b...Cam punch, 21a, 21b, 2
1c, 21d...Arm with cam, 22...Pin, 23
... Adjustment plate, 24 ... Adjustment screw, 25 ... Roller, 26
...Cylinder, and the same reference numerals in each figure represent the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A press die for bending a copper plate, which is a workpiece material, has a curved punch for bending the copper plate, a die that has a recess of the same shape as the punch under the punch and functions as a press bed, and a die near the die. A protruding cam is provided at the upper end of the arm, the vicinity of this cam is rotatably supported, the engagement point of the cam with the punch is maintained in a straight line from the top dead center to the bottom dead center, and the workpiece is A pair of cam-equipped arms that support the copper plate and adjust the bending angle of the copper plate by rotating the arms, and a pair of cam-equipped arms that descend in conjunction with the punch and press the cam of the cam-equipped arm to rotate the arm. 1. A press mold comprising: a curved cam punch; and a cylinder provided with a roller at its tip, expands and contracts following the rotation of a cam-equipped arm, and supports the arm.