Progressive die capable of eliminating wave deformation generated in stamping process of sheet metal

Abstract

The invention discloses a progressive die capable of eliminating wave deformation generated in the stamping process of sheet metal. The progressive die comprises a lower die base and an upper die base. The upper die base is provided with an outer guiding post. The lower die base is provided with an outer guiding hole, and the outer guiding post can slide in the outer guiding hole for guiding. The upper side of the lower die base is provided with a concave die back plate. The lower side of the upper die base is provided with a punch back plate. The lower side of the punch back plate is provided with a punch holding plate. A concave die is arranged on the upper portion of the concave die back plate. A punch is arranged on the punch holding plate. According to the technical scheme, the progressive die is characterized in that the maximum clearance Dmax between a circular arc chamfer segment of the cross section of the punch and a circular arc chamfer segment of the cross section of a concave die cavity of the concave die is larger than the clearance D between a straight segment of the cross section of the punch and a straight segment of the cross section of the concave die cavity.

Description

【Technical field】 [0001] The invention relates to a metal sheet stamping processing equipment, more specifically to a progressive die for eliminating wave deformation caused by stamping the metal sheet. 【Background technique】 [0002] With the increasingly fierce market competition, various manufacturers have developed continuous stamping products of large and widened metal sheets to improve the production efficiency of the products and reduce the manufacturing costs of the products. [0003] Continuous stamping products of large and widened metal sheets are prone to wave deformation problems during the stamping production process, which will seriously affect the smooth progress of subsequent production processes. The wave problem is a technical problem plaguing the industry. [0004] Analysis of the cause of the waves, the first period of time after the new mold or the notch of the grinding die, the notch is in a relatively sharp state, and the stamped product will not pro...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a progressive die that eliminates the wave deformation caused by stamping metal sheets, and to increase the cross-sectional circle of the punch of the progressive die while ensuring the product quality and punch strength. The gap between the arc chamfering section and the arc chamfering section of the cavity cross section can effectively eliminate the wave deformation caused by the progressive die stamping metal sheet

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