Hole flanging die

Abstract

The invention discloses a hole flanging die. The hole flanging die comprises a male die body fixedly connected to an upper die base, and a female die sleeve fixedly connected to a lower die base and matched with the male die body. The male die body comprises a hole flanging part close to the upper die base, and a punching part far away from the upper die base, and the female die sleeve is matched with the punching part. The hole flanging die further comprises a movable limiting mechanism, the female die sleeve moves in the opening and closing direction of the die through the movable limiting mechanism and is fixed to the preset position, and when the female die sleeve is located at the lower limit position, a preset distance is formed between the upper end face of the female die sleeve and the lower end face of the hole flanging part. Accordingly, the hole flanging die can achieve the pre-punching and hole flanging procedures in the same die, and therefore the usage amount of the die is reduced, the tool cost of the die is reduced, the production cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a hole turning mold. Background technique [0002] Hole turning refers to the stamping method that uses a mold to turn the hole edge of the sheet into a vertical edge. It is mainly used to manufacture the assembly parts of related parts, or to process a specific shape in order to improve the rigidity of the parts. The automobile body-in-white is composed of hundreds of stamping parts welded. In order to meet the realization of the assembly function of the automobile body, some automobile stamping parts are designed with a hole-turning shape. The hole-turning shape is realized by turning the hole with a mold in the stamping process. . [0003] In the prior art, hole turning is generally realized through two processes, that is, pre-punching and hole turning, wherein the pre-punching process is in such as figure 1 As realized in the punching die shown, after the pre-punching is comp...

AI Technical Summary

Problems solved by technology

[0005] However, since the die cover 12 and the die holder are in a fixed connection form, if the hole turning is continued after the pre-punching process is completed, the hole turning part of the punch will interfere with the die cover, so the pre-punching die The hole turning operation cannot be performed, and an additional turning mold is required, which not only increases the number of mold processes, but also increases the cost of mold tooling

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