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A method for rotary extrusion forming of light alloy cup-shaped parts

A technology for extrusion forming and cup-shaped parts, applied in the direction of metal extrusion dies, etc., can solve the problems of easy folding or cracks, poor forming effect, etc., to reduce performance anisotropy, enhance deformation strengthening effect, and large plasticity The effect of strain

Active Publication Date: 2018-08-17
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to aim at the defects and deficiencies of the prior art, to provide a light alloy cup-shaped piece rotary extrusion forming method, the purpose is to improve the formability of magnesium alloys, obtain large plastic deformation, improve the comprehensive mechanical properties of formed components, Overcoming the poor forming effect in the traditional rotary extrusion forming process, which is prone to defects such as folding or cracks

Method used

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  • A method for rotary extrusion forming of light alloy cup-shaped parts
  • A method for rotary extrusion forming of light alloy cup-shaped parts
  • A method for rotary extrusion forming of light alloy cup-shaped parts

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Embodiment

[0041] A 7075 aluminum alloy cup-shaped piece with an outer diameter of 200mm and an inner diameter of 170mm is prepared from a cylindrical solid blank as a specific example, and a method for rotating extrusion forming of a light alloy cup-shaped piece with a "fan leaf"-shaped structure boss mold surface is introduced in detail. .

[0042] The specific process size of the mold parts adopted in the embodiment is as follows: see Figure 7 As shown, the diameter D1 of the working belt 13 of the punch 1 is 170mm, the chamfer R1 at the bottom of the working belt 13 is 10°, the thickness H1 of the working belt 13 is 20mm, and the inclination α0 of the "fan blade"-shaped boss 14 is 30°. The rounded corner R0 at the bottom of the leaf "shaped boss 14 is 5°; see Figure 5 , 7 As shown, R4=D1 / 2=85mm, L0=L1 / 2=15mm, R3=55mm; refer to Figure 8 As shown, the height of the forming die 2 is H2=200mm, the draft angle of the inner cavity side wall is 0.5°, the opening angle of the arc surfa...

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Abstract

The invention provides a light alloy cup-shaped part rotary extrusion forming method. The method comprises the steps that (1) charging is conducted; (2) homogenizing heat treatment is conducted; (3) forming pre-preparation is conducted, specifically, a die subjected to preheating heat preservation is mounted on a hydraulic machine, the end, making contact with a blank, of a die punch is provided with a blade-shaped-structure boss die face, and a plurality of arc surface grooves are formed in the side wall of an inner cavity of a forming female die; (4) the blade-shaped-structure boss die face punch moves downwards, and an upper workbench does not rotate at the moment and just moves downwards; (5) part of metal flows into a blade face zone, under a punch end face working zone, of a boss successively, and metal on the periphery of the blank successively flows into the grooves of the inner cavity wall of the forming female die; (6) the upper workbench of the forming hydraulic machine drives the blade-shaped-structure boss die face punch to start rotating; and (7) forming is completed, a cup-shaped part subjected to extrusion forming is ejected out of a die cavity of the forming female die. Through the method, the comprehensive mechanical properties of magnesium alloy forming components are improved.

Description

technical field [0001] The invention relates to the technical field of metal plastic processing and forming, in particular to a method for rotary extrusion forming of a light alloy cup-shaped piece with a leaf-shaped structure boss mold surface. Background technique [0002] Cup-shaped components are one of the most representative structural forms in the fields of aerospace, national defense, transportation, etc., and are typical parts of reverse extrusion technology. The reverse extrusion forging has precise shape and dimensional accuracy, less cutting allowance, and good comprehensive mechanical properties. It has the characteristics of "high efficiency, high quality, and low energy consumption", and has high use value in technology and economy. The cup-shaped component prepared by the traditional reverse extrusion forming process requires multiple times of upsetting and drawing to achieve the ideal fine-grain strengthening effect, and the production efficiency is low. Fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/18B21C25/02
CPCB21C23/186B21C25/02
Inventor 薛勇张治民陈帅帅徐健王强赵熹
Owner ZHONGBEI UNIV
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