JPH0434975Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a press hole punching mold.

[Conventional technology]

The press working method is highly productive, suitable for mass production, and has the advantage of being able to manufacture parts with complex shapes relatively easily. Therefore, this press working method is used to manufacture various parts in the automobile manufacturing process. widely used.

In this press working method, the vertical movement of the upper die and lower die is generally used to perform various processes such as squeezing, bending, and drilling a plate-shaped workpiece. 1978-
There is a hole-making mold as shown in Publication No. 116119. That is, a driver cam is provided on the upper mold, and a slider cam and a die having a punch are provided on the lower mold.As the upper mold descends, a plate-shaped press work is held between the pressers, and the slider cam is raised by the driver cam. The slider cam is slid in a direction perpendicular to the downward direction of the mold, and a horizontal hole is made in the plate-shaped press work using the punch and die of the slider cam. In this type of mold, problems arise when the punch and die are provided separately on the upper and lower sides, for example, a punch in the upper mold and a die in the lower mold. This method has the advantage that there is no problem of inability to accurately drill holes due to misalignment, and that it is compatible with changes in workpiece plate thickness.

[Problem that the invention attempts to solve]

However, in the mold described in the above-mentioned conventional publication, by bringing the inclined cam surface of the driver cam into sliding contact with the inclined cam surface of the slider cam, the downward driving force of the upper die is changed to an obliquely downward driving force, and the slider cam is moved laterally. Since the slider cam is made to slide in this direction, a downward force (bending force) is applied to the slider cam, and as a result, there is a concern that the position of the punch may change over time, making it impossible to drill holes accurately. Ru.

In view of these problems, this invention aims to provide a press hole punching die that can guarantee hole punching accuracy by reducing changes in the punch position over time while maintaining compatibility with changes in workpiece thickness. It is.

[Means for solving problems]

Therefore, in the press hole punching die according to this invention, the upper die is provided with a driver cam, the lower die is provided with a slider cam, and the presser of the upper die is provided with a slide member having a punch and a die.

[Effect]

In this device, when the upper die is lowered, the slider cam is slid in a predetermined direction by the driver cam, and the sliding member having the punch is slid in the same direction by the sliding of the slider cam. A hole is made in the press work, and the slide member and the slider cam are in a linear pressing relationship, so that almost no bending force acts on the punch, and the presser of the upper mold is equipped with a punch and a die. This ensures compatibility with changes in workpiece thickness.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The drawing shows a press hole punching die according to an embodiment of the present invention. In the figure, 1 is the upper mold, 2 is the lower mold,
A driver cam 3 having an inclined cam surface 3a is fixed to the upper mold 1, and a presser 4 is provided on the upper mold 1, and the presser 4 is movable up and down a predetermined distance on the upper mold 1 by a guide mechanism 5. An elastic member 6 is interposed between the presser 4 and the upper mold 1.

On the other hand, a slider cam 7 is provided on the lower die 2 so as to be slidable in the horizontal direction, and the slider cam 7 is formed with an inclined cam surface 7a that comes into sliding contact with the inclined cam surface 3a of the driver cam 3. A spring member 8 is interposed between the lower die 2 and the slider cam 7 to bias the slider cam 7 in the backward direction. Also, lower mold 2
A press plate 9 for holding down the slider cam 7 is fixed to the slider cam by bolts 9a.

Further, a slide member 10 is provided on the presser 4 so as to be slidable in the horizontal direction.
0 is supported on the presser 4 by a presser plate 11 attached to the presser 4 by bolts 11a, and a spring member is provided between the slide member 10 and the presser 4 to bias the slide member 10 in the backward direction. 12 are interposed. This slide member 1
A punch 13 is fixed to the punch 13, and an elastic member 15 for holding down the press work 14 is attached to the tip of the punch 13.
is fixed to the presser 4, and a die 16 is fixed to the presser 4 facing the punch 13.

Next, the operation will be explained.

In this press hole punching mold, before the mold is operated, the upper mold 1 is located at the upper end position, and the presser 4 is also raised and separated from the lower mold 2, and the slider cam 7 and the slide member 10 are located in the retracted position by the spring force of the spring members 8 and 12, respectively, and the punch 13 is separated from the die 16.

When the press work 14 is placed on the lower mold 2 in this state and the main mold is operated, the upper mold 1 first descends, and the presser 4 also descends accordingly, and the press work 14 is placed between it and the lower mold 2. The driver cam 3 descends as the upper mold 1 descends, and the inclined cam surface 3 of the driver cam 3 comes into sliding contact with the inclined cam surface 7a of the slider cam 7.
As a result, the slide member 10 having the punch 15 also moves forward in the horizontal direction against the spring force of the spring member 12. When the upper mold 1 further descends, the presser 4 firmly clamps the press work 14 between it and the lower mold 2, and the elastic member 15 at the front end of the punch 13
In this state, the punch 13 moves forward, and the punch 13 and die 16 make a hole in the press work 14.

When the hole drilling is completed, the upper mold 1 rises, and the presser 4 and driver cam 3 also rise accordingly.
Since the slider cam 7 and the slide member 10 move back and return to the state before the operation described above, when the workpiece 14 is taken out, the workpiece 14 having completed drilling can be obtained.

In the mold of this embodiment as described above, the downward movement of the upper die driver cam is once changed into the horizontal sliding movement of the lower die slider cam, and the slide member having the punch is horizontally slid by this slider cam. As a result, almost no downward force is applied to the slide member itself, and only horizontal force is applied to the slide member itself, and the position of the punch hardly changes over time, allowing accurate hole drilling over a long period of time. In addition, since no downward force is applied to the holding plate of the sliding member, problems such as rattling of the holding plate or breakage of the holding plate mounting bolts do not occur, and the durability of the mold is improved. can be guaranteed.

In addition, in this mold, a punch and a die are provided on the presser of the upper mold, so for example, a punch and a die are provided on the upper mold.
This eliminates the problem of positional misalignment between the punch and die when the thickness of the workpiece changes, unlike when the punch and die are installed separately on the top and bottom, such as when the lower die is equipped with a die. , compatibility with changes in workpiece thickness can be guaranteed.

[Effect of idea]

As described above, according to the present invention, the upper mold is provided with a driver cam, the lower mold is provided with a slider cam, and the presser of the upper mold is provided with a slide member having a punch and a die, and the lowering of the upper mold is temporarily stopped by the slider cam. Since the slide member holding the punch is slid by this sliding in a predetermined direction, no bending force is applied to the punch, and the position of the punch is prevented from changing over time. This has the effect of ensuring drilling accuracy and ensuring compatibility with changes in press work plate thickness.

[Brief explanation of drawings]

The drawing is an overall configuration diagram of a press hole punching die according to an embodiment of the present invention. 1... Upper die, 2... Lower die, 3... Driver cam, 4... Pretusa, 7... Slide cam, 10
...Slide member, 13...Punch, 14...Workpiece, 16...Dice.

Claims (1)

[Claims for Utility Model Registration] A driver cam provided on the upper mold; a slider cam provided on the lower mold and slid in a predetermined direction by the driver cam; a presser that is lowered and clamps the workpiece between it and the lower mold; a die provided on the presser; and a slide provided on the presser and slid in the predetermined direction by the slider cam. 1. A press hole punching die comprising: a member; and a punch provided on the slide member and punching holes in the work together with the die.