Counterbore stamping forming mould and process

Abstract

The invention discloses a counterbore stamping forming mould and process. The counterbore stamping forming mould comprises an extrusion mould and a punching and sizing mould, wherein the extrusion mould is used for extruding a blank to form a workpiece, and the punching and sizing mould is used for punching and sizing the workpiece to obtain a finished product; the extrusion mould comprises an extrusion punch and an extrusion concave die, and the end part of the extrusion punch is an extrusion circular platform; an extrusion cutting edge is arranged at the top of the extrusion concave die, and a push rod hole is formed in the lower part of the extrusion cutting edge; the punching and sizing mould comprises a punching and sizing punch and a punching concave die; the bottommost part of the punching and sizing punch is a cylinder, and the upper part of the cylinder is connected with a sizing circular platform; a punching cutting edge is arranged at the top of the punching concave die. The taper angle of a workpiece counterbore is A2, the diameter at the large end is D21, and the diameter at the small end is D2. The taper angle of a finished product counterbore is A3, the diameter at the large end is D31, and the diameter at the small end is D3. The counterbore stamping forming mould and process realize the precise forming of counterbores under small deformation and low loading, avoid hole bursting, etc., improve the processing efficiency of the counterbores, and reduce the reject rate and the manufacture cost.

Description

technical field

[0001] The invention relates to the field of forming technology, in particular to a countersink punching forming process and a mold. Background technique

[0002] Generally, countersunk holes of products are manufactured by machining in China, which is very passive and inefficient when faced with large-volume products.

[0003] On the other hand, stamping processing, such as punching through the hole first and then pressing the countersunk hole; or extruding the countersunk hole and then punching through the hole; When countersinking, the deformation of the hole is large, resulting in problems such as hole cracking, workpiece deformation, and punching burrs.

[0004] Therefore, how to improve the processing efficiency of the countersink hole and the precision of the workpiece, reduce the scrap rate, and thereby reduce the manufacturing cost has become more and more important in the industry. Contents of the invention

[0005] The object of the present inv...

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