Extrusion die with multiple corners and forming method thereof

A corner extrusion and corner technology, applied in the field of material extrusion, can solve the problems of cumbersome process and uneven deformation of extrusion blanks, and achieve the effects of simple mold structure, overcoming uneven structure and high production efficiency

Inactive Publication Date: 2014-12-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a multi-angle extrusion die and forming method, which solve...

Method used

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  • Extrusion die with multiple corners and forming method thereof
  • Extrusion die with multiple corners and forming method thereof
  • Extrusion die with multiple corners and forming method thereof

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Embodiment 1

[0036] Such as Figure 1~5 As shown, a multi-rotational extrusion die includes a punch 3, a bolt 5, an upper die 1 and a lower die 2, the upper die 1 and the lower die 2 are tetrahedral, and the lower surface of the upper die 1 is provided with a downward The upper surface of the lower die 2 is provided with upward grooves, and bolt holes 6 are uniformly arranged on both sides of the grooves of the upper die 1 and the lower die 2, and the upper die 1 and the lower die 2 are fastened together, and the bolts 5 Solid, the grooves of the upper die 1 and the lower die 2 form an extrusion mold cavity, and the extrusion mold cavity is a multi-angle extrusion cavity; as Figure 4 As shown, the multi-corner extrusion cavity is sequentially divided into a guide section cavity 7, a first corner cavity 8, a second corner cavity 9, a third corner cavity 10, and a fourth corner cavity from the extrusion inlet. Cavities 11 and shaping section cavities 12, in which the cross-sections of the ...

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Abstract

The invention discloses an extrusion die with multiple corners and a forming method thereof and belongs to the technical field of material extrusion. The extrusion die comprises a puncher pin, a bolt, an upper die and a lower die, wherein the upper die and the lower die are tetrahedron, the lower surface of the upper die is provided with a downward groove while the lower surface of the lower die is provided with an upward groove, both sides of the grooves of the upper and lower dies are respectively provided with bolt holes, the upper die and the lower die are fastened by bolts, the grooves of the upper and lower dies are formed into an extrusion die cavity which has multiple corners. Through the die, fine and equiaxed crystals are easily formed; the problems of uneven structures and complex processes in primary ECAP (equal-channel angular pressing) formation materials are effectively overcome; the die is simple in structure, easily processed and prepared into various fine metal, alloys, intermetallic compounds, composite materials and other ultrafine-grained materials, or prepared into difficult-to-deformation metal, such as magnesium alloy, thus the one-pass extrusion technique with multiple corners is achieved and its production efficiency is high.

Description

Technical field [0001] The invention is a material extrusion technology field, which involves a multi -rotor squeeze mold and forming method. Background technique [0002] Equal channel angular presing (ECAP) is one of the methods of forming the forming of blocks of blocks based on severe plastic deformation technology.The material is strongly cut and deformed at the corner of the ECAP mold, and the size of the section of the material is unchanged, so as to achieve repeatedly squeezing, accumulating a large number of strain, and achieving the purpose of refining the material organization and improving the comprehensive performance of the material.Although the study of ECAP's preparation of ultra -fine crystal materials has obtained everyone's consensus, it has also found that there is a problem of uneven deformation, which is close to the inner corner φ [0003] The materials of the materials are large and the detailed effect is good, but at the outer corner, the response is smal...

Claims

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Application Information

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IPC IPC(8): B21C25/02B21C23/18
Inventor 汪程鹏林鹏薛凤梅杨琳池成忠林飞曹晓卿
Owner TAIYUAN UNIV OF TECH
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