Recoil square die

Abstract

The invention discloses a recoil square die. The recoil square die comprises an upper die and a lower die, the lower die is provided with an upward punch, a fixing device for fixing a processed bolt is arranged above the punch in a guide sliding mode, a vertical through bolt mounting passage corresponding to the upside and downside of the punch is formed in the fixing device, the bolt mounting passage is provided with an upper opening for holding the bolt, a lower outlet for enabling the lower end of the bolt to come out of the bolt mounting passage and contact with the punch to perform punching, and a limit structure having thrust fit with the processed bolt, an elastic support is arranged between the fixing device and the lower die, when using, the upper die and lower die move relatively, and the upper die compresses the head of the processed bolt on the limit structure and moves towards the punch to perform punching. According to the recoil square die, because the bolt is installed from the upper opening of the bolt mounting passage, there is a certain distance between the bolt and the upper die, the bolt can be installed or taken out conveniently, and accordingly the material change time is greatly saved, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the field of stamping dies, in particular to a recoil square die used for processing hexagonal bolts at the tail. Background technique [0002] The traditional hexagonal bolt products with inner hexagonal tail are generally stamped by special stamping dies. For example, the Chinese utility model patent with the notification number CN202963187 discloses a titanium alloy high-efficiency bolt punching hexagonal hole die. The die includes upper and lower dies. A punch is fixed on the upper die, and a processed bolt is fixed on the lower die relative to the punch of the upper die. The guide column guides the upper and lower molds. When in use, the upper mold drives the punch to move down and punch the bolts to be processed. The upper and lower wooden boards of this kind of punching inner square hole die have an open structure. When the precision of the bolts to be processed does not meet the installation requirements and a collisi...

AI Technical Summary

Problems solved by technology

The upper and lower wooden boards of this kind of punching inner square hole die have an open structure. When the precision of the bolts to be processed does not meet the installation requirements and a collision occurs during the punching process, the punch is easily broken and sputtered out, causing serious damage to the punch. The staff brings great potential safety hazards. On the other hand, the lower mold of the mold is provided with a lower mold fixing plate. After the completion, it is very inconvenient to take out the processed bolts, which increases the time for replacing parts and affects the processing efficiency to a certain extent

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