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Magnesium alloy variable section rolling and die pressing compound forming device and forming method

A technology of composite molding and variable cross-section, which is applied in the field of plastic forming of non-ferrous metals, can solve problems such as easy cracking and poor plasticity, and achieve the effects of refined grains, optimized performance, and uniform structure

Active Publication Date: 2019-04-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional deformed magnesium alloy also has the problem of poor plasticity and easy cracking in the hot rolling process.

Method used

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  • Magnesium alloy variable section rolling and die pressing compound forming device and forming method
  • Magnesium alloy variable section rolling and die pressing compound forming device and forming method
  • Magnesium alloy variable section rolling and die pressing compound forming device and forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 selects extruded MM31 magnesium alloy plate.

[0026] 1) Cut the extruded MM31 magnesium alloy plate to be processed into the desired shape.

[0027] 2) Heating the magnesium alloy billet to 400°C, heating up to a predetermined temperature and then keeping it warm for 20 minutes;

[0028] 3) Heat the cavity surfaces of the upper template 2 and the lower template 3 to 100°C with an external heating device;

[0029] 4) putting the magnesium alloy blank into the cavity of the mould;

[0030] 5) Send the magnesium alloy variable-section rolling-molding composite molding die to the feeding position, and the rolls drive the mold to pass through the rollers to realize variable-section rolling-molding composite molding. The rolling speed is 8m / min, the distance between the rollers is 30mm, and the thickness of the upper template is 15mm, the thickness of the lower template is 15mm.

[0031] 6) After forming, short-term recrystallization annealing treatment is ca...

Embodiment 2

[0033] Example 2 uses a multi-element and small amount of magnesium alloy plate Mg-1.2Sn-0.8Zn-0.5Mn (wt.%).

[0034] 1) Cut the multi-element and small amount magnesium alloy plate Mg-1.2Sn-0.8Zn-0.5Mn (wt.%) to be processed into the desired shape.

[0035] 2) Heating the magnesium alloy billet to 350°C, raising the temperature to a predetermined temperature and keeping it warm for 10 minutes;

[0036] 3) Heat the cavity surfaces of the upper template 2 and the lower template 3 to 100°C with an external heating device;

[0037] 4) putting the magnesium alloy blank into the cavity of the mould;

[0038] 5) Send the magnesium alloy variable-section rolling-molding composite molding die to the feeding position, and the rolls drive the mold to pass through the rollers to realize variable-section rolling-molding composite molding. The rolling speed is 10m / min, the distance between the rollers is 40mm, and the thickness of the upper template 20mm, the thickness of the lower templ...

Embodiment 3

[0041] Embodiment 3 uses deformed aluminum alloy 6022.

[0042] 1) Cut the deformed aluminum alloy 6022 to be processed into the desired shape.

[0043] 2) Heat the aluminum alloy billet to 450°C, heat it up to the predetermined temperature and keep it warm for 30 minutes;

[0044] 3) Heat the cavity surfaces of the upper template 2 and the lower template 3 to 100°C with an external heating device;

[0045] 4) putting the aluminum alloy blank into the cavity of the mould;

[0046] 5) Send the aluminum alloy variable-section rolling-molding composite molding die to the feeding position, and the rollers drive the mold to pass through the rollers to realize the variable-section rolling-molding composite molding. The rolling speed is 20m / min, the distance between the rollers is 50mm, and the thickness of the upper template 25mm, the thickness of the lower template is 25mm.

[0047] 6) Short-term annealing treatment is carried out on the workpiece according to requirements after...

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Abstract

The invention discloses a magnesium alloy variable section rolling and die pressing compound forming device and method and belongs to the field of nonferrous metal plastic forming. The magnesium alloyvariable section rolling and die pressing compound forming device and method mainly aim to achieve magnesium alloy variable section rolling forming, and solve the problem of magnesium alloy variablesection forming. According to the magnesium alloy variable section rolling and die pressing compound forming device and method, due to a composite process of rolling and die pressing forming, a variable section magnesium alloy is rolled. According to a specific machining process: firstly, a rolled blank material is placed in a groove between an upper mold plate and a lower mold plate; the upper mold plate and the lower mold plate are fed into a feeding position in a guide rail groove, and are driven into an upper roller and a lower roller through friction force; and due to closing of the uppermold plate and the lower mold plate, die pressing forming of the blank material in cavities of the upper mold plate and the lower mold plate is formed. Due to the machining process, a variable section magnesium alloy workpiece uniform in structure and optimized in performance can be obtained.

Description

technical field [0001] The invention belongs to the field of plastic forming of nonferrous metals. Background technique [0002] Magnesium alloys have excellent properties, such as low density, high specific strength and specific stiffness, strong shock resistance, strong noise reduction capabilities, and superior processing performance. It can be widely used in aviation, aerospace, automobile, 3C and many other fields, and has received more and more attention in recent years. However, the existing usage conditions are far from the potential advantages of magnesium alloys. The crystal structure of magnesium alloy is a close-packed hexagonal structure, and its plastic formability at room temperature is poor, so it is greatly restricted in practical applications. [0003] Magnesium alloy sheets are generally produced by rolling process. Since the plasticity at room temperature is very low, rolling processing is difficult, so hot rolling and warm rolling are usually used. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/00
CPCB21C37/00Y02P70/10
Inventor 李志刚马品奎王慧远查敏王珵韩洪江赵泼贾红杰徐进任明文
Owner JILIN UNIV
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