JPH03294019A - Die for cold press forming - Google Patents

Abstract

PURPOSE:To omit the correcting work for matching products to the die after forming and the reworking for die and to secure the finishing dimension with one time of press forming by setting the finely adjusting mechanism which is able to adjust finely the width dimension of U-letter to the pressing die. CONSTITUTION:The liner 5 which consists of the finely adjusting mechanism is set with the machine screw to the groove machined part of the side face of the pressing die 1 in the order of the shim 4 and the liner 5, and the width dimension of the pressing die 1 can be made to adjust it with the number of shim 4. Therefore, because the width dimension of die is made changeable, so the finishing dimension for forming good is made adjustable, after confirming the finishing dimension on the test pressing machine of cold press, by increasing or decreasing the number of shim 4, the width dimension of die can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to cold press forming of a long U-shaped object, and particularly to a press molding die suitable for improving finished dimensional accuracy.

[Conventional technology]

In conventional press forming of long objects with a U shape, variations in thickness and tensile strength peculiar to the material affect the finished dimensions after forming, and in molded products with tight tolerances, tolerance deviations often occur. The company had tried to correct the mold fit after molding, reprocessed the mold six times, and re-press-molded the mold, but this had become a major bottleneck in terms of cost. Note that related IkMs of this type include, for example, Japanese Patent Application Laid-open No. 173617/1983.

[What the invention seeks to solve! Ill The above-mentioned conventional technology is not aimed at supplying products through press molding of -degrees, but it is possible to complete the product by secondary means after press molding, such as correcting the mold fit after press molding or reworking the mold. Because of this, it had the disadvantage of requiring huge processing costs.

An object of the present invention is to provide a cold press molding die that eliminates post-molding mold adjustment work and mold rework, and can ensure finished dimensions with a -degree of press forming.

[! l! Means to solve a]

In order to achieve the above purpose, a removable liner on the side of the mold is used to make mold! ! A mechanism is provided to make it possible to adjust one dimension of the product, so that the product can be obtained immediately by press molding at -degrees.

[For production]

Micro II! III! The liner that makes up the structure is screwed into the grooved part of the side of the mold in the order of shims and liner, so that the width of the mold can be adjusted by adjusting the number of shims. This makes it possible to adjust the finished dimensions of the molded product by making the width of the mold variable, and after testing the finished dimensions with a trial press using a cold press, the width of the mold can be adjusted by increasing or decreasing the shims. Na II! ! can do.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1@1 and FIG.

In the figure, press Wll and Down! ! ! The side beam press molding die consists of shims 4 and 2, with grooves formed on both sides of the press die. Fine adjustment that allows you to fix the liner 5 with flat screws 6 and adjust the width of the product! It is equipped with an I mechanism,
By sliding the second press die up and down, the material 3 is pressed into a fixed lower die and cold forming is performed.

Next, the operation of this press molding will be explained. The m (W) dimension of the press mold is set in advance to an arbitrary size, and the finished size after cold press molding is confirmed with an Al check using a trial press. With that III recognition.

By increasing or decreasing the number of shims, the width (W) of the mold can be adjusted and applied to the product. With the above operations, there is no occurrence of finished products that are out of dimension tolerance due to press forming, and products that meet all required dimensions can be obtained.

Figure 3 shows the shape of the side beam, which is an example of a completed product. [See 4(8).

In order to accurately obtain the h1 dimension and h2 dimension in FIGS. 3 and 4, the above-mentioned fine 11t! One mechanism is provided on the mold side.

According to this embodiment, by cold pressing a material that can be subjected to cold press forming, it is possible to improve the dimensional accuracy of the product after pressing, and to reduce the occurrence of scratches in the product. Further, internal stress generated and remaining in the product during cold press forming can be removed by annealing cavities that are performed for the purpose of stress relief after welding and assembly.

〔Effect of the invention〕

According to the present invention, it is possible to prevent tolerance deviations in finished dimensions during press molding, and a cape and a product can be obtained by a - degree of press pressing, which is effective in shortening working time.

[Brief explanation of drawings]

l! Fig. II is a sectional view of a cold press molding die according to an embodiment of the present invention, Fig. 2 is a detailed view of the press die shown in Fig. 1, Fig. 3 is a side view of the side beam after forming light T, and Fig. 3 is a side view of the side beam after forming light T. FIG. 4 is a side view of FIG. 3. 1...Press die, 2...Lower die, 3...
...Material, 4...Shim, 5...Liner 6...Counter screw Fig. 2 11

Claims (1)

[Claims] 1. A press mold for bending a long flat plate into a U-shape using a mold consisting of a press mold and a lower mold, comprising a fine adjustment mechanism that allows the width dimension of the U-shape to be adjusted. A cold press molding die, characterized in that it is provided in the pressing die.