Die blanking process utilizing matching of large clearance and small clearance

Abstract

The invention discloses a die blanking process utilizing matching of large clearance and small clearance, which includes: (1) blanking a product primarily by a first punch to form a processed cut; and (2) blanking the product secondarily by a second punch to complete the blanking process of the product, wherein the clearance between the first punch and a first die cut at the processed cut formed in the primary blanking is smaller than the clearance between the first punch and the first die cut at the other positions. By the die blanking process utilizing matching of large clearance and small clearance, the contradiction between the requirement of increasing clearance in secondary shearing of blanking sections of medium-thickness plates and the requirement of reducing clearance so as to reduce point burrs at cutting joints is overcome, point burrs at the cutting joints are eliminated by means of small-clearance local blanking at the processed cut, and secondary shearing is omitted by large-clearance blanking at other positions, so that section quality is improved. Accordingly, the die blanking process is simple and convenient for operation.

Description

technical field [0001] The invention relates to a blanking process, in particular to a punching process of a die with large and small gaps matched, and belongs to the technical field of punching. Background technique [0002] like Figure 1-Figure 3 As shown, in the existing die blanking process, when the first knife and the second knife are punched, the clearance between the punch and the first die edge needs to be increased due to the secondary shearing of the punched section of the medium-thick plate. The gap between 2 is certain and relatively large, but because the gap between the punch 3 and the first die edge 2 at the process notch 8 is relatively large during the first knife blanking, the formed slump angle is relatively large, thus When the second knife is punched, there are more burrs 7 at the joint, resulting in poor quality of the cross section. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a die b...

AI Technical Summary

Problems solved by technology

[0002] like Figure 1-Figure 3 As shown, in the existing die blanking process, when the first knife and the second knife are punched, the clearance between the punch and the first die edge needs to be increased due to the secondary shearing of the punched section of the medium-thick plate. The gap between 2 is certain and relatively large, but because the gap between the punch 3 and the first die edge 2 at the process notch 8 is relatively large during the first knife blanking, the formed slump angle is relatively large, thus As a result, when the second knife is punched, there are more burrs 7 at the joint, resulting in poor quality of the section

Images