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Counterbore stamping forming mould and process

A technology of stamping forming and countersinking, which is applied in the direction of metal extrusion dies, perforating tools, forming tools, etc., to achieve the effects of improving the precision of the parts, reducing the cost of mold processing, and improving the life of the mold

Active Publication Date: 2017-06-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a countersink hole stamping forming process and mold to solve the technical problems existing in the existing countersink hole processing

Method used

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  • Counterbore stamping forming mould and process
  • Counterbore stamping forming mould and process
  • Counterbore stamping forming mould and process

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Experimental program
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Embodiment Construction

[0033] see figure 1 (a) to figure 1 Shown in (c), a countersink punching forming process of the present invention is divided into two work steps:

[0034] In the first step, the plate-shaped blank 1 is first made into a process part 2 by means of extrusion;

[0035] In the second step, the process part 2 is made into a finished product 3 and a waste material 4 by means of punching and shaping.

[0036] The finished product 3 with counterbore is obtained by two-step forming.

[0037] in:

[0038] 1) The taper angle A2 of process part 2 is 3°-5° larger than the taper angle A3 of the countersunk hole;

[0039] 2) The large end diameter D21 of the frustum hole of process part 2 is 1mm-2mm larger than the large end diameter D31 of the countersunk hole;

[0040] 3) The diameter D2 of the small end of the frustum hole of process part 2 is 1mm-2mm larger than the diameter D3 of the small end of the countersunk hole;

[0041] The extrusion forming process of the first step of the...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D28/34B21C25/02B21C26/00B21D37/10B21C23/14B21D28/24
CPCB21C23/14B21C25/02B21C26/00B21D28/24B21D28/34B21D37/10
Inventor 杨程衡明张文旭路星星
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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