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Shear deformation blank making die and blank forming method

A technology of shear deformation and billet, which is applied in the direction of metal extrusion dies, etc., can solve the problems of cumbersome process and uneven deformation of extrusion billet, and achieve the effect of solving cumbersome forming process, simple structure and improving production efficiency

Inactive Publication Date: 2015-04-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a shear deformation billet mold and a method for forming billets, which is suitable for the billet making of metals with a small aspect ratio (0.25≤diameter D / height H≤1), and solves the problem of extrusion in the existing ECAP technology. The problem of uneven deformation of the billet and cumbersome process

Method used

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  • Shear deformation blank making die and blank forming method
  • Shear deformation blank making die and blank forming method
  • Shear deformation blank making die and blank forming method

Examples

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Embodiment Construction

[0032] The present invention is further illustrated by the following examples, but not limited to the following examples.

[0033] A cylindrical pure copper billet with a diameter of 100 mm and a height of 50 mm was sheared and deformed.

[0034] Figure 1~2 It shows a schematic structural view of the shear deformation billet mold, which includes an extrusion cylinder 2, a first punch 1, a second punch 3, a third punch 5, and a fourth punch 6;

[0035] The extrusion barrel 2 is a cylindrical sleeve with an extrusion cavity inside, the extrusion cavity is a cylindrical structure, the inner diameter of the extrusion barrel is 100 mm, and the length is 180 mm;

[0036] One end of the first punch 1 and the second punch 3 is an elliptical slope, the other end is a plane, and the middle part is a cylindrical structure. Contact; the diameter of the first punch 1 and the second punch 3 is 100 mm, the effective height of the central axis is 170 mm, and the angle between the elliptica...

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Abstract

The invention discloses a shear deformation blank making die, which includes an extrusion cylinder, a first punch, a second punch, a third punch, and a fourth punch. The method for blank forming by the die includes: (1) blank pretreatment; (2) extrusion preparation; (3) first end face extrusion deformation; (4) first upsetting extrusion; (5) second end face extrusion deformation; (6) second upsetting extrusion; and (7) blank extrusion. The die and the method provided by the invention are applicable to blank making of metal with small height-diameter ratio (with the ratio of diameter D to height H being greater than or equal to 0.25 and less than or equal to 1), and solve the problems of uneven extruded blank deformation and tedious process in the existing ECAP technology.

Description

technical field [0001] The invention belongs to the technical field of metal billet making, and in particular relates to a shear deformation billet making die and a method for forming a billet. Background technique [0002] Equal channel angular pressing (ECAP) is one of the forming methods for preparing bulk ultrafine-grained materials based on severe plastic deformation technology. The material is subjected to strong shear deformation at the corner of the ECAP die, and through the characteristics of the material cross-sectional size being constant, repeated extrusion is achieved, a large amount of strain is accumulated, and the purpose of refining the material structure and improving the comprehensive performance of the material is achieved. [0003] The L-shaped, U-shaped, C-shaped, S-shaped corner reciprocating extrusion dies and repeated upsetting extrusion proposed in the patent applications of Chinese patent publication numbers CN101259493, CN1709605, CN2757953, CN275...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/02
CPCB21C23/02B21C25/02
Inventor 汪程鹏田雅馨孙营
Owner TAIYUAN UNIV OF TECH