JPH01113130A - Drawing press die - Google Patents

Abstract

PURPOSE:To reduce the die cost and to improve the productivity by forming a die face by plural linking members and fixing the die face and a die base via a fixing member as well. CONSTITUTION:The lower die face formed by linking members 8, 9, 10 is arranged on a lower die base 16 and similarly the die face formed by linking members 8', 9', 10' is fixed to an upper die base 17. A punch 19 and die 23 are prepd. in advance and the linking members 9, 10, 9', 10' are deviated with performing a trial press. When an adequate wrinkle pressing face is formed, a high molecular resin, etc., are flowed between the die face and die and fixed by its solidification. In case of pressing a fixed plate is removed. The reuse of the die face is thus enabled and the manufacturing time of the die face is drastically shortened. Consequently the die cost is reduced and the productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement of a drawing press mold having an undulating wrinkle pressing surface.

[Prior art]

For example, as shown in FIG. 6, wrinkle pressing portions 2.3, 4.
There is a product l whose surface 5 is not flat but undulating. This product
When press-forming, wrinkle press parts 2, 3, 4.5
The wrinkle presser portion is held and pressed using a press machine made to match the undulations of the wrinkle press.

Therefore, when pressing the flat plate with the undulating wrinkle pressing surface, the seventh
As shown in the figure, the complicated deformation of the edge of the flat plate is concentrated in the center of the flat plate, resulting in bulges 6 and fold lines 7. If pressed in this state, for example, folds IJij 7 may remain on the product surface, or Otherwise, wrinkles may appear on the product surface, resulting in the product being discarded as a defective product.

The occurrence of these fold lines and wrinkles is caused by subtle changes in the undulating shape of the wrinkle presser, so the shape of the wrinkle presser surface cannot be determined theoretically to match the shape of the product, but can be determined empirically. many.

A typical conventional die face is a fixed type with a wrinkle pressing surface machined to match the shape of the product.

Furthermore, although this is at an experimental level, there is a method in which the wrinkle pressing surface can be formed freely by bundling wires together.

And the present invention, which targets wrinkle pressing surfaces with ups and downs,
There are many ideas to improve the versatility of press machines and press molds, although their differences differ.

For example, when pressing a box product, as shown in Japanese Utility Model Application No. 56-95432, there is a railless mold that can freely change the length of the four sides. A simple mold for presses that made it possible to replace the die, as shown in Utility Model Application Publication No. 59-6016, a mold mechanism that made it possible to replace the punch plate and gouging plate according to the shape of the product, Utility Model Application Publication No. 59-6016 As shown in Japanese Utility Model Publication No. 137917, the gap between a pair of processing blades is adjusted with a spacer block to form a metal processing die for processing various materials, and as shown in Japanese Utility Model Application Publication No. 59-25326, it is possible to combine gouly plates. There is a standard type die plate that can be freely separated and standardizes the goo plate.

[Problem that the invention seeks to solve]

First, the fixed type die face, which is a common die face, has the following problems.

The undulating wrinkle pressing surface is designed to match the product. Then actually try pressing using that die face. Correct the defect.

In this way, in the case of a fixed type, the Gui face is created by repeating trial pressing and correction several times.

Therefore, since it takes a long time and requires a lot of labor, there are problems in that productivity is low and costs are high.

In addition, there is a problem of material economy E because a lot of wasted material is used for trial pressing, and due to time and cost considerations, even if some wrinkles occur in the product, it may not improve performance. Since products within an acceptable range were allowed in terms of appearance, there were also defective products, and countermeasures were taken such as making the material dimensions thicker in anticipation of errors in the die face. For these reasons, there is a problem of poor material yield.

Furthermore, since it is a -product-die face, even if the shape of the product changes slightly due to a model change, for example, the die face cannot be used and a new die face must be made. There is a problem.

Next, bundles of wire can be freely deformed to match the shape of the product, making it compatible with all kinds of products.
There are the following problems.

That is, in the process of press working, the material is drawn into the press mold and shaped. Therefore, the material will sag on the wrinkle-pressing surface that holds the edge of the material, and the wrinkle-pressing surface must be capable of allowing this sliding.

So, I formed it by bundling wire together. Since the wrinkle holding surface is a slightly uneven surface, the material does not easily slide during pressing, and the amount of material pulled in during pressing cannot be controlled, causing problems such as cracks in the product.

Another problem is that the durability of the mold is low.

[Means to solve the problem]

In order to solve the above problems, the present invention forms the die face of a drawing press mold with a plurality of link members, and fixes the die face to the mold base by interposing a fixing member between the die face and the mold base. It is characterized by having done.

[For production]

With this configuration, the displacement of each link is adjusted according to the shape of the product, and a suitable wrinkle pressing surface can be formed in a short time while performing trial pressing.

〔Example〕

An embodiment of the present invention will be described in detail below. The die face shown in FIG. 1 has an overall rectangular shape with a concave central part, and includes semi-fixed link members 8 and 11 formed in a U-shape, and an intermediate link member 9. ，
10 are movably connected by a pin 14.

The connecting portions 12 are fitted with projections and recesses, and this fitting portion is smooth without any difference in level.

Moreover, the wrinkle pressing surface A has smooth undulations as a whole. Reference numeral 15 designates a long hole for the pin 14, which is movable in the downward direction at the connecting portion 12 of the link member 9.10. Reference numeral 13 denotes a dowel pin hole for regulating the positional relationship between the upper die face and the lower die face.

1B is a lower die.

In the embodiment shown in FIG. 2, the elongated hole 15 shown in FIG. 1 is not provided, and the semi-fixed link member 8 is moved horizontally as shown by arrow A to adjust the die face surface (wrinkle pressing surface A). It was designed to do this.

As for the other parts, the same parts as in FIG. 1 are indicated by the same reference numerals, so the explanation thereof will be omitted.

In FIG. 3, 18 is a fixed member, and link member 8
, 9 and 10 to the lower mold stand 1B, and the link member 8'.

The die face formed by 9' and 10' is fixed to the upper mold stand 17. And this fixing member 18.

For example, it is a coagulating material such as cement or polymer resin. Or
The fixing member 18 may be replaced by bolts, blocks, or welding.

Reference numeral 21 denotes a fixing plate for regulating the positional relationship between the upper die face and the lower die face, and is fixed by inserting a dowel pin 22 into the dowel hole shown in FIG.

19 is a punch, 20 is a punch stand, and 23 is a die.

In FIGS. 4 and 5, link members 8' and 8.9'
and 9.1G', 10" and 11" and 11 are fixed with the fixed plate 21 with equal gaps, respectively.
The link members fixed in this manner are connected by pins 14. As a result, the wrinkle pressing surfaces A of the upper die face and the lower die face deform while maintaining similar shapes even when the link member is displaced. Also, the difference between Fig. 4 and Fig. 5 is that the position of the connecting part 12 (Fig. 1) between link members 9, 10, 9' and to' is slightly from the bottom of the recess in Fig. 4. It is located at a remote location, and in the case of Figure 5, it is located at the bottom of the depression.

That is, when the link member is moved, the shape of the depression (V-shape) is maintained in the case of FIG. Form a die face with the shape of .

The operation of this embodiment configured as above will be explained next.

First, punches 18 and dies 23 are made to match the shape of the product. A die face that matches this is then selected.

Next, while performing a trial press, the link members 9, 10.
Move 9” and 10”. During this movement, since 9' and 9 and 10' and 10 are fixed by the fixing plate 21, they are moved while maintaining their mutual positional relationship. And when the most appropriate wrinkle pressing surface is formed.

For example, a polymer resin is poured between the die face and the mold table and solidified and fixed. As a result, the wrinkle pressing surfaces of the upper die face and the lower die face become substantially the same surface and are fixed to the upper die stand 17 and the lower die stand 16.

When performing press working, the fixing plate 21 is removed. If bolts, blocks, or polymer resin are used for the fixing member 18, the die face can be reused even if the parts change slightly due to, for example, a model change of an automobile. is possible.

In the above description, the die face has a rectangular shape and has a depression in the center, but the die face is not limited to this, and can also be applied to a die face as shown in FIG. 6, for example. Further, the shape and number of link members are not limited to these.

〔Effect of the invention〕

As detailed above, according to the present invention, since the die face is formed by a plurality of link members, it is possible to easily form an appropriate wrinkle pressing surface on the product.

As a result, the time required to make the die face is greatly shortened and productivity is improved, while the material waste due to trial presses and defective products are reduced, and the material yield is greatly improved by optimizing material removal. Has excellent effects.

In addition, in conjunction with the increased use of the die face by link members, the die face and die base are fixed by the fixing member, so the die face can be removed, and even if the shape of the product changes slightly due to model changes, etc. The die face can be reused, and drawing press molds can be standardized, thereby shortening the mold manufacturing period, reducing mold costs, and improving productivity.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view of a drawing press die, FIG. is a vertical sectional view showing the relationship between the die base and the die face, FIG. 4 is a front view of the die face when the connection of the link member is located away from the recess, and FIG. 5 is a view showing the relationship between the link member and the die face. FIG. Figure 6 is an explanatory perspective view showing a product with undulations on the wrinkle pressing surface, and Figure 7 is a perspective view showing the state in which the material is pressed by the wrinkle pressing surface in order to press the product shown in Figure 6. FIG. 8.9, 10.11... Link member (upper die face) 8', 9', 10', 11'... Link member (lower die face) 16... Lower die stand, 17. ...Upper mold stand, 18...Fixing member. Patent applicant Toyota Motor Corporation (and 2 others) Figure 3 Figure 04 Figure 6 Ward Figure 7

Claims (1)

[Claims] A drawing press mold characterized in that the die face of the drawing press mold is formed of a plurality of link members, and the die face is fixed to the mold stand via a fixing member between the die face and the mold stand.