JP2643207B2 - Piercing type manufacturing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a piercing die for punching a hole in a plate-shaped work, and particularly to a method of manufacturing a piercing die for simplifying a set of a button die and a piercing punch. Things.

2. Description of the Related Art Conventional manufacturing methods of this kind are described, for example, in FIGS.
This was performed as shown in the figure. That is, first, the upper die 1 and the lower die 2 are set in a predetermined positional relationship, the button die 3 is driven into a predetermined position of the lower die 2, and then the piercing punch 4 is aligned with the position of the button die 3. Then, it is fixed to the upper mold 1 with a bolt or the like (not shown) using the punch retainer 5 (see FIG. 4).

Thereafter, as shown in FIG. 5, a plate-like work 6 as a test piece is placed on the lower mold 2, and then the upper mold 1 is lowered.
First, the plate-shaped work 6 is pressed by the pad 7 arranged on the upper die 1, and further, the upper die 1 is lowered, so that the pierce punch 4 and the die hole 3 a of the button die 3 form a plate. A test hole 6a is opened in the work 6.

After that, the plate-shaped work 6 is taken out and the test hole is taken out.
Inspect position 6a. According to this inspection, when the test hole 6a is displaced from the normal position and needs to be corrected, a correction value is detected, and the position of the button die 3 is changed to a two-dot chain line in FIG. It shifts as shown, and is again driven into the lower die 2, and the position of the pierce punch 4 is again adjusted according to the position of the button die 3 as shown by a two-dot chain line in FIG.
This operation is repeated until the test hole 6a is opened at an appropriate position, so that the button die 3 and the piercing punch 4 are set at predetermined positions.

On the other hand, as shown in FIG. 8, first, a test hole 6a is formed in a peripheral portion of the plate-like work 6 in a state shown by a solid line in the figure, and then a secondary processing is performed as shown by a two-dot chain line in the figure. In some cases, in the state shown by the solid line in the figure, the circular test hole 6a may be deformed into an ellipse or the like when subjected to secondary processing. Therefore, in the case of a piercing die for processing a workpiece that performs such secondary processing, by inspecting the shape of the test hole 6a, the shape of the test hole 6a at the time of secondary processing becomes circular. The shape correction value is detected, and the shape of the die hole 3a of the button die 3 and the shape of the pierce punch 4 are determined.

Problems to be Solved by the Invention However, in such a conventional piercing type manufacturing method, after the button die 3 is driven into the lower die 1, the piercing punch 4 is set in accordance with the button die 3. When the position and shape are repeatedly corrected, the piercing punch 4 must be set in accordance with the button die 3 each time, and the workability is poor. Was.

Means for Solving the Problems The present invention has been made in view of such a conventional problem, and a plate-like work is placed on a lower mold having a die hole provided in a predetermined position in advance. A high-pressure rubber having a work pressing surface of a predetermined area is provided thereon, and a test hole is formed in cooperation with the work pressing surface and the hole by pressing the high-pressure rubber from above. Inspect the position and shape of the hole and detect the correction value that will be the proper position and shape,
A method of manufacturing a piercing die, in which a die hole having a predetermined hole shape is formed at a predetermined position of the lower die according to the correction value, and a piercing punch is set on the upper die in accordance with the position and the hole shape of the die hole. It is characterized by having.

According to this means, the test hole is pierced in the plate-like work in cooperation with the work pressing surface having a predetermined area of the high-pressure rubber and the lower die hole. Then, the position and shape of the test hole are inspected to detect a correction value, and the die hole having the position and shape based on this value is reset to the lower die. In the past, the piercing punch was reset according to the position and shape of this die hole,
If high pressure rubber having a work pressing surface with a predetermined area is used as in the present invention, even if the position of the die hole on the lower mold side changes slightly, it is not necessary to change the position and the like of the high pressure rubber. Test holes can be pierced using rubber,
This eliminates the need for resetting the piercing punch as in the past.

After the correction value is determined, a die hole is formed in accordance with this value, and a piercing punch may be set in accordance with the die hole. Need not be performed, and as a result, the setting step can be omitted, and workability is improved.

Examples Hereinafter, the present invention will be described based on examples.

FIGS. 1 and 2 show a first embodiment of the present invention.

In this embodiment, reference numeral 11 denotes an upper die and 12 denotes a lower die. First, the two dies 11 and 12 are set in a predetermined positional relationship, and a button die 13 is driven into a predetermined position of the lower die 12. . On the other hand, a generally cylindrical urethane 14 as high-pressure rubber is mounted on the upper mold 11. In the urethane 14, the work pressing surface 14a on the plate-like work 6 side (lower surface side) has a predetermined area. The upper die 11 is lowered, and the plate-shaped work 6 is pressed on the work pressing surface 14a of the urethane 14 so that the button die 1 is pressed.
The test hole 6a is pierced in the plate-like work 6 in cooperation with the third die hole 13a. Reference numeral 6b is a scrap.

Thereafter, the plate-like work 6 is taken out and the position of the test hole 6a is inspected. According to the result, when the test hole 6a is not opened at a predetermined position, the correction value is detected.

Then, according to the correction value, lower the button die 13
Re-strike to the predetermined position of 12. Then, the upper mold 11 is lowered again, and a test hole 6a is opened in the plate-like work 6 with the urethane. In this case, the urethane 14 is a work pressing surface having a predetermined area.
Since the button die 14 is provided, even if the position of the button die 13 is slightly moved, the test can be performed without resetting the urethane 14.

When the test hole 6a is pierced at a predetermined position of the plate-like work 6 in this way, the piercing punch is set in the upper die 11 in place of the urethane 14 in accordance with the position of the button die 13. I do.

In this case, since the pier sponge need only be finally set, it is not necessary to reset the pier spong every time the test is repeated as in the prior art, and the workability is improved.

 FIG. 3 shows a second embodiment of the present invention.

In this embodiment, a die hole 12a is opened instead of driving the button die 13 into a predetermined position of the lower mold 12, while urethane 14 as high-pressure rubber is attached to the press ram 17 instead of the upper mold 11. Then, the press ram 17 is lowered, and the first
As in the embodiment, the test hole 6a is pierced in the plate-like work 6 in cooperation with the urethane 14 and the die hole 12a of the lower die 12. When the test is performed in this manner and the position of the die hole 12a of the lower mold 12 is determined, the button die 13 is first placed at the position of the die hole 12a.
And then, according to this button die 13,
Set the pierce punch 4 to 11.

According to this embodiment, the button die 13 is moved to the lower mold 12 for each test.
Since it is not necessary to repeat the operation, the workability is further improved as compared with the first embodiment.

By the way, when the plate-like work 6 is subjected to secondary processing as shown in FIG. 8, first, a test hole 6a is pierced in the plate-like work 6 using urethane. Thereafter, the plate-shaped work 6 is subjected to secondary processing, and the shape of the test hole 6a in this secondary processing state is inspected. A correction value is detected so that the test hole 6a is formed in a predetermined hole shape, and the button die 13 having an appropriate die hole 13a is moved to the lower mold 12 according to the correction value.
To set the pier punch 4 corresponding to the button die 13 at a predetermined position.

Even in the case where the hole shape is changed as described above, the workability is improved as in the above embodiment.

In the above embodiment, the high-pressure rubber is attached to the upper mold or the like. However, the present invention is not limited to this. The high-pressure rubber may be set between the plate-shaped work and the press ram to open the test hole. Further, in the above-described embodiment, the button die driving method is used as the method of forming the die holes. However, the present invention is not limited to this, and it is a matter of course that the die holes can be formed directly on the lower die.

Effect of the Invention As described above, according to the present invention, a plate-shaped panel placed on a lower mold is pressed from above with a high-pressure rubber having a work pressing surface of a predetermined area, and the high-pressure rubber and the lower mold are pressed. By opening a test hole in a plate-like panel with a hole, it is not necessary to perform a test using a pierce punch, so that the workability of a set of pierce punches and the like can be improved, which is practically useful. It is effective.

[Brief description of the drawings]

1 and 2 are views showing a first embodiment of a method of manufacturing a piercing die according to the present invention. FIG. 1 is a sectional view showing a state before setting a plate-like work, and FIG. 2 is a plate-like work. FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing a pierced state of FIG. 3, FIG. 3 is a cross-sectional view corresponding to FIG.
7 are views showing a conventional example, FIG. 4 is a sectional view showing a state in which a pierce punch is set, FIG. 5 is a sectional view corresponding to FIG. FIG. 7 and FIG. 7 are explanatory views showing a state in which the button die and the pier sponge are moved, respectively. FIG. 4 ... Pierce punch, 6 ... Plate work 6a ... Test hole, 11 ... Top mold 12 ... Bottom mold, 12a ... Die hole 13 ... Button die, 13a ... Die hole 14 ... Urethane ( High pressure rubber), 14a …… Work pressing surface

Claims (1)

(57) [Claims] 1. A plate-like work is placed on a lower mold having a die hole at a predetermined position in advance, and a high-pressure rubber having a work pressing surface of a predetermined area is disposed on the plate-like work. By pressing from above, a test hole is formed in cooperation with the work pressing surface and the hole, and the position and shape of the test hole are inspected and a correction value such that the correct position and shape are obtained. Detecting, forming a die hole having a predetermined hole shape at a predetermined position of the lower die according to the correction value, and setting a piercing punch on the upper die in accordance with the position and the hole shape of the die hole. A characteristic piercing type manufacturing method.