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Bidirectional composite extrusion die and extrusion forming method for magnesium alloy plate and strip

A magnesium alloy plate and composite extrusion technology, which is applied to metal extrusion dies and other directions to achieve the effects of low cost, improved secondary forming and subsequent rolling formability, and improved base surface texture

Active Publication Date: 2019-01-01
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects existing in extrusion processing and multi-directional forging deformation of existing magnesium alloy plates and strips, the object of the present invention is to provide a bidirectional composite extrusion die and extrusion forming method for magnesium alloy plates and strips

Method used

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  • Bidirectional composite extrusion die and extrusion forming method for magnesium alloy plate and strip
  • Bidirectional composite extrusion die and extrusion forming method for magnesium alloy plate and strip
  • Bidirectional composite extrusion die and extrusion forming method for magnesium alloy plate and strip

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Take the shape of the magnesium alloy billet as a cylinder (diameter 500mm, length 1000mm) as an example.

[0031] Such as Figure 1~3 As shown, a two-way compound extrusion die for magnesium alloy plate and strip: includes a cylindrical mold body 4, the left end of the mold body 4 is fixedly connected with a cylindrical extrusion cylinder 2, and the inside of the mold body 4 is along its axis from the left end to the right end. The front extruding channel 5, the transition channel 6, the side extruding channel 7, and the outlet channel 8 are sequentially provided with butt joint communication. The cross-sections of the parts on both sides have the same shape and equal area; the cross-sections of the front extrusion channel 5 and the side extrusion channel 7 gradually become smaller from left to right, and the extrusion cavity, transition channel 6 and outlet of the extrusion cylinder 2 The cross-sections of the channel 8 are equal from left to right; the cross-section...

Embodiment 2

[0039] The difference from Example 1 is that the magnesium alloy billet 3 is in the shape of a slab, the mold body 4, the extrusion cylinder 2, the extrusion cavity of the extrusion cylinder 2, and the pressure rod 1 of the hydraulic press are all in the shape of a slab. The shape of the left end of the extrusion channel 5 also changes correspondingly with the shape of the magnesium alloy billet. The structure of the two-way composite extrusion die in this example is as follows figure 1 , 2 , 4 shown.

Embodiment 3

[0041]The difference from Example 1 is that the shape of the magnesium alloy billet 3 is a cuboid, the shape of the mold body 4, the extrusion cylinder 2, the extrusion cavity of the extrusion cylinder 2, and the pressure rod 1 of the hydraulic press are all cuboid, and the front extrusion The shape of the left end of channel 5 also changes accordingly with the shape of the magnesium alloy billet. The structure of the two-way composite extrusion die in this example is as follows figure 1 , 2 , 5 shown.

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Abstract

The invention discloses a two-way compound extrusion die of magnesium alloy sheet strips and an extrusion molding method thereof. The two-way compound extrusion die comprises a die body, wherein the left end of the die body is connected with an extrusion cylinder; a front extrusion channel, a transition channel, a side extrusion channel and an outlet channel which are in butted communication with each other are arranged from left to right in the die body along an axial direction of the die body; the left end of the front extrusion channel is in butted communication with an extrusion cavity of the extrusion cylinder; cross sections of parts on two sides of a random butted communication part are same in shape and equal in area; cross sections of the front extrusion channel and the side extrusion channel are gradually diminished from left to right; cross sections of the extrusion cylinder of the extrusion cylinder, the transition channel and the outlet channel are equal from left to right; the cross section of the extrusion cavity of the extrusion cylinder and a cross section of a magnesium alloy billet are same in shape and equal in area; the cross sections of the right end of the front extrusion channel, the transition channel, the side extrusion channel and the outlet channel are shaped as rounded rectangle. Through the two-way compound extrusion die and the extrusion molding method thereof, high-plasticity magnesium alloy sheet strips can be manufactured.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a bidirectional compound extrusion die and an extrusion molding method for magnesium alloy plate and strip. Background technique [0002] Magnesium alloy is an important lightweight structural material. Compared with steel and aluminum alloy, it not only has higher specific strength and specific stiffness, but also has excellent heat dissipation performance, electromagnetic shielding performance, shock absorption performance and machining performance. Its products Widely used in aerospace, automotive and military industries. China is rich in magnesium resources, and magnesium minerals account for more than 60% of the world's total reserves, and my country's market is huge, and magnesium alloys have great potential in 3C and other aspects. However, the application of magnesium alloys in my country is still in its infancy, and the output of primary ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C25/02B21C23/06
CPCB21C23/001B21C23/002B21C23/06B21C25/02
Inventor 丁云鹏高卡樊磊郭晓琴张锐
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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