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Screw-driven synchronous extruding and twisting composite device for fine-grain magnesium alloy and processing method

A technology of screw transmission and compound device, which is applied in the direction of metal processing equipment, metal extrusion, metal extrusion die, etc., can solve the problems of non-continuous production and low efficiency of processing methods, achieve continuous processing and production, and improve the use of Range, the effect of improving the comprehensive mechanical properties

Active Publication Date: 2019-12-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a synchronous extruding and twisting compound device and processing method of a spiral-driven fine-grained magnesium alloy, which has the advantages of refining the grain and weakening the texture and enabling continuous and precise processing, and solves the current problem The processing method is inefficient and cannot be continuously produced

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  • Screw-driven synchronous extruding and twisting composite device for fine-grain magnesium alloy and processing method
  • Screw-driven synchronous extruding and twisting composite device for fine-grain magnesium alloy and processing method
  • Screw-driven synchronous extruding and twisting composite device for fine-grain magnesium alloy and processing method

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Embodiment 1

[0036] A processing method of a screw-driven fine-grained magnesium alloy synchronous extrusion and twisting composite device, comprising the following steps:

[0037] S1. Material selection: solid block magnesium alloy billet 9, AZ31 magnesium alloy bar with circular cross section, diameter Φ80mm, length 100mm, magnesium content 95%, aluminum content 3.0%, zinc content 1.0% , the rest are Mn, Fe and other elements, solid sandpaper, made of SiC particles, the order of mesh is 600#, 1000#, 1200#, 2500#, solid powder high temperature graphite, 99.5% of 1200ml liquid liquid Absolute ethanol, 99% acetone of 800ml liquid liquid;

[0038] S2. Pretreatment 1: Grinding the magnesium alloy blank 9 with coarse sandpaper to remove surface impurities and burrs, and then using fine sandpaper of different meshes in order of mesh to remove the surface of the magnesium alloy blank 9 Oxide layer to reduce friction;

[0039] S3, pretreatment 2: preparing blank cleaning solution, the proportio...

Embodiment 2

[0047] A processing method of a screw-driven fine-grained magnesium alloy synchronous extrusion and twisting composite device, comprising the following steps:

[0048] S1. Material selection: solid block magnesium alloy billet 9, AZ61 magnesium alloy bar with square section, cross-sectional area of ​​60×60mm 2 , the length is 100mm, the magnesium content is 92%, the aluminum content is 6.0%, the zinc content is 1.0%, and the rest are Mn, Fe and other elements, solid sandpaper, the material is SiC particles, and the mesh number is from small to large. It is 600#, 1000#, 1200#, 2500#, high-temperature graphite in solid powder, 99.5% absolute ethanol in 1200ml liquid liquid, and 99% acetone in 800ml liquid state;

[0049] S2. Pretreatment 1: Grinding the magnesium alloy blank 9 with coarse sandpaper to remove surface impurities and burrs, and then using fine sandpaper of different meshes in order of mesh to remove the surface of the magnesium alloy blank 9 Oxide layer to reduce ...

Embodiment 3

[0058] A processing method of a screw-driven fine-grained magnesium alloy synchronous extrusion and twisting composite device, comprising the following steps:

[0059] S1. Material selection: solid block magnesium alloy billet 9, Mg-8Li-1Al-1Zn alloy round ingot, diameter Φ100mm, length 100mm, magnesium content 95%, lithium content 8.0%, aluminum content The content is 1.0%, the zinc content is 1.0%, the rest is Mn, Fe and other elements, solid sandpaper, the material is SiC particles, the mesh number is 600#, 1000#, 1200#, 2500#, solid Powdered high-temperature graphite, 99.5% absolute ethanol in 1200ml liquid, 99% acetone in 800ml liquid;

[0060] S2. Pretreatment 1: Grinding the magnesium alloy blank 9 with coarse sandpaper to remove surface impurities and burrs, and then using fine sandpaper of different meshes in order of mesh to remove the surface of the magnesium alloy blank 9 Oxide layer to reduce friction;

[0061] S3, pretreatment 2: preparing blank cleaning soluti...

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Abstract

The invention discloses a screw-driven synchronous extruding and twisting composite device for a fine-grain magnesium alloy and a processing method, and relates to the technical field of magnesium alloy application. The device comprises a base and a magnesium alloy blank, wherein a concave extrusion die is arranged at the upper end of the middle part of the inner side of the base, and the lower end of the concave extrusion die is in rotating connection with a variable-section concave extruding and twisting die through a roller bearing; the magnesium alloy blank is arranged in the concave extrusion die and the variable-section concave extruding die; a convex extrusion die is glidingly connected with the upper end of the inner side of the concave extrusion die and is positioned right above the magnesium alloy blank; a discharging port is formed in the middle part of the lower end of the inner side of the variable-section concave extruding and twisting die; and a synchronous twisting device is fixedly connected to the bottom part of the variable-section concave extruding and twisting die. According to the device, a severe plastic deformation process in which extruding and twisting aresynchronously carried out is achieved, and thus the deformation uniformity of the magnesium alloy blank is ensured in the process of fully refining grains.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy application, in particular to a synchronous extruding and twisting compound device and a processing method of a spiral-driven fine-grained magnesium alloy. Background technique [0002] As a light-weight structural material, magnesium alloy shows broad application prospects in national industry and daily production due to its low density, high specific strength, high specific stiffness, and good electromagnetic shielding performance. However, due to the close-packed hexagonal structure of magnesium alloys, only two slip systems can be activated at room temperature, so its plastic deformation ability is very poor, which greatly affects the further processing and engineering applications of magnesium alloys. In order to break through this technical problem, many studies have been devoted to improving the comprehensive mechanical properties of magnesium alloys. Generally speaking, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/21B21C25/02B21C29/00B21C43/00B21C23/00
CPCB21C23/21B21C23/212B21C25/02B21C29/003B21C43/00B21C23/001
Inventor 王利飞张学文朱星晓张华张征勇曹晓卿
Owner TAIYUAN UNIV OF TECH
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