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

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...

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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

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