JPS6130750Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a die set clamp mechanism, and particularly to a clamp mechanism for a die holder attached to a press machine.

Hydraulic or pneumatic clamping devices have conventionally been used as a method for fastening die holders and press bodies in order to facilitate die holder replacement work in press machines and shorten the work time. When replacing the die holder, it is necessary to provide a relief for the tightening portion of the clamp device in the press machine or the die holder so that the clamp device does not get in the way.

For example, FIGS. 1 and 2 show a press machine with a relief, and FIGS. 3 and 4 show a die holder with a relief. That is, in FIGS. 1 to 4, a is an adapter plate, b is an upper die holder, c is a lower die holder, and d is a table. Further, e is a clamp device provided at eight locations above and below. f is the above-mentioned relief, and arrow g indicates the direction in which the die holder is taken out.

In this way, providing a relief in the press body or die holder requires extensive machining, which is disadvantageous in terms of cost, and depending on the shape, it may be unreasonable in terms of structure and strength. There are cases.

Furthermore, if the above-mentioned relief is not provided and the clamping device is removed directly by the operator's hands, not only will it take a lot of effort, but there is also a risk that the removed clamping device will be lost.

This invention is suitable for both press machines and die holders.
In addition, the clamping device can be easily removed without providing the above-mentioned relief, and there is no possibility of losing the clamping device after it has been removed.
Another object of the present invention is to provide a die set clamp mechanism that allows the die holder to be retracted to a position where it will not hinder the insertion and removal of the die holder.

For this reason, the configuration of the present invention includes a fixed part fixed to a member that becomes the fixed side when replacing the die holder of the press machine, and one end of which is pivoted to the fixed side pin provided in the thickness direction of the die holder. It consists of a lever, and an arm having one end pivotally connected to an intermediate pin provided in the thickness direction of the die holder at the other end of the lever and supporting a clamping device at the other end, and the clamping device is arranged in the thickness direction of the die holder. This press is characterized in that it is configured to generate a clamping force to fix the die holder to the press body.

To replace the die holder with the above configuration,
First, release the clamping force of the clamp device to loosen the fixation between the die holder and the press body, and then rotate the lever and arm around the fixed side pin and intermediate pin to the retracted position where they will not get in the way when replacing the die holder. Move the entire clamping device. Next, the die holder is taken out from any direction on the press body and replaced with a desired die holder. Thereafter, the clamp device is returned to the operating position by operating in the opposite direction to that described above, and the die holder is fixed to the press body in the thickness direction. In this way, in this invention, the entire clamping device is moved to the retracted position on the opposite side of the die holder with respect to the fixed part and replaced, so the die holder on the press body can be moved without the clamping device getting in the way during work. Can be replaced smoothly from any direction. Moreover, since the clamp device is moved along the die holder at this time, the space required for attaching and detaching the clamp device can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 5 to 7.

5 and 6 show an embodiment of the present invention, in which numeral 1 indicates the bed of a press machine, which may be an adapter plate. 2 is a die holder, 3 is a clamp device, 4 is a left press frame which is a member that becomes a fixed side when the die holder 2 is replaced, and 5 is a fixing part fixed to the frame 4. Reference numeral 6 denotes a fixed side pin, which is provided on the fixed part 5. Reference numeral 7 denotes a lever, one end of which is pivotally connected to the fixed side pin 6, and the other end of which has an intermediate pin 8. Reference numeral 9 denotes an arm, one end of which is pivotally connected to the intermediate pin 8, and the other end of which is pivotally connected to a clamp-side pin 10 provided on the clamp device 3. Additionally, 11 and 12 are arrows indicating the direction of drawing out the die holder, with the former pointing forward and the latter pointing backward.

In the die set clamping mechanism constructed as shown in FIGS. 5 and 6, during normal work, the die holder 2 and the bed 1 are connected to the clamping device 3.
Fixed by However, when it becomes necessary to take out the die holder 2 in the direction of the arrow 11 or 12, hydraulic pressure is applied to the clamp device 3 to loosen the die holder 2 and the bed 1. In Fig. 5, an air cylinder (not shown) etc.
When the lever 7 is rotated clockwise around the fixed side pin 6, and the arm 9 is further rotated clockwise around the intermediate pin 8 using another air cylinder, etc.,
As shown by the two-dot chain line in FIG. 5, the clamp device 3 can be suspended to the right by the fixing portion 5 and retracted at position B where it does not interfere with the insertion and removal of the die holder 2. Once the die holder 2 has been replaced, the operation is the reverse of the above.
Fix the die holder 2 and bed 1.

FIG. 7 shows an example of how the die set clamp mechanism of the present invention is actually attached to a press machine, and the die holder is fixed in this figure. Therefore, when replacing the die holder, each clamp device 3 is placed on standby by rotating the lever 7 and arm 9 to a position where they do not interfere with the insertion and removal of the die holder, as described in FIGS. 5 and 6. Become. In Fig. 7, 13 is the right frame, 14 is the left frame, 15 is the upper ram,
16 is the upper bed, 17 is the upper die set, 18 is the lower die set, 19 is the lower bed, 20 is the upper mold, 21
2 is a lower mold, and 22 is a punch.

According to the present invention, there is no need to provide a relief in either the die holder or the press body as in the conventional case, and the die holder can be smoothly inserted and removed from any direction by placing the entire clamp device in a retracted position. In this case, since the clamp device is moved in the direction along the die holder and evacuated, there is a unique effect that the space required for attaching and detaching the clamp device is small.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an example of a clamping device and relief in a conventional press machine, Fig. 2 is a front sectional view showing a part of Fig. 1, and Fig. 3 is a similar one. FIG. 4 is a front sectional view showing a part of FIG. 3, FIG. 5 is a plan view showing an embodiment of the present invention, and FIG. 5 is a sectional view taken along cutting line A-A in FIG. 5, and FIG. 7 is a partially cutaway front view showing how the mechanism shown in FIGS. 5 and 6 is attached to a press machine. 1... Bed (pre body), 2... Die holder, 3... Clamp device, 4... Press frame, 5... Fixed part, 6... Fixed side pin, 7... Lever, 8... Intermediate pin, 9... Arm, 10...
Clamp side pin.

Claims (1)

[Scope of utility model registration request] a fixed part fixed to a member that becomes a fixed side when replacing a die holder of a press machine; a fixed side pin provided on the fixed part in the thickness direction of the die holder; a lever having one end pivotally connected to the fixed side pin; The other end of this lever includes an intermediate pin provided in the thickness direction of the die holder, an arm having one end pivotally connected to the intermediate pin, and an arm supported by the other end of the arm to generate a clamping force in the thickness direction of the die holder. A die set clamp mechanism comprising a clamp device that fixes the die holder to the press body.