Torsion type reciprocating extrusion device and process method thereof

A technology of reciprocating extrusion and processing methods, which is applied to the forming tools of metal extrusion, metal extrusion, metal processing equipment, etc., and can solve the problems of different deformation modes and degrees, uniformity defects of ultra-fine-grained materials, and uneven disassembly of molds. Convenience and other issues, to achieve the effect of sufficient grain refinement, improved mechanical properties, and light equipment

Active Publication Date: 2011-02-09
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the biggest disadvantage of this technology is that the production efficiency is low, the disassembly of the mold is very inconvenient, and the deformation mode and degree of deformation of the material near the inner and outer corners of the channel corners are different, which leads to the uniformity of the structure of the ultrafine-grained material prepared by this method. There are certain defects

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  • Torsion type reciprocating extrusion device and process method thereof
  • Torsion type reciprocating extrusion device and process method thereof
  • Torsion type reciprocating extrusion device and process method thereof

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Embodiment Construction

[0030] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0031] Such as figure 1 As shown, the extrusion device involved in this embodiment includes: an upper pressing head 1, a die 2, a lower pressing head 3, a positioning pin 4, a die cover plate 5, a die fixing plate 6, and a set plate fixing screw 7, wherein The die fixing plate 6 is fixed on the workbench, and the die 2 has a built-in linear variable cross-section circular extrusion channel. The profile of die 2 adopts a square structure with variable cross-section (see image 3 ), assembled between the die fixing plate 6 and the die cover plate 5. After being positioned by the positioning pin 4, it is connected ...

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Abstract

The invention discloses a torsion type reciprocating extrusion device and a process method thereof, belonging to the technical field of plastic formation. The device comprises a cavity die, a cavity die cover plate and a cavity die fixing plate, wherein the cavity die fixing plate is fixed on a work table, and the cavity die with a variable section spindle structure is arranged between the cavity die fixing plate and the cavity die cover plate. The process method makes materials generate the compound formation of reciprocating extrusion and torsion shearing so as to prepare ultra-fine grained materials with larger volume and uniform tissue.

Description

technical field [0001] The invention relates to a device and method in the technical field of plastic forming, in particular to a twisting reciprocating extrusion device and a processing method for preparing ultrafine-grained materials. Background technique [0002] The large plastic deformation technology, referred to as SPD, has a remarkable ability to refine grains, and can refine the grain structure of materials to submicron or even nanometer levels. Promising approach. In recent years, large plastic deformation technology has been developed rapidly, mainly including: equal channel angular extrusion ECAE, high pressure torsional HPT, reciprocating extrusion CEC, etc. However, due to the limitation of process conditions, these three deformation methods have their own defects. [0003] Found through document retrieval to prior art, " MICROBAND FORMATION IN CYCLIC EXTRUSION COMPRESSION OF ALLUMINUM " (reciprocating extrusion) published by M.Richert et al. In the article,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/00B21C31/00B21C25/00
Inventor 周浩王渠东
Owner SHANGHAI JIAO TONG UNIV
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