An Extrusion Forming Method of "Big Belly and Small Mouth" Type Branch Light Alloy Components

Abstract

The invention discloses an extrusion molding method of a large-belly and small-mouth branch light alloy component. The method comprises the following steps: (1) preparation before molding: a light alloy cylindrical part and an extrusion molding mold are totally preheated; the extrusion molding mold mainly comprises an upper mold module, a lower mold module, an ejection device and split inner and outer support modules; a molding angle is arranged on a convex mold of the upper mold module, and is transited from small to big and from big to small; the split inner and outer support modules are arranged between the upper mold module and the lower mold module; the ejection device is arranged below the lower mold module, and is connected with the lower mold module in a clearance fit manner; and the top end of the ejection device is contacted, matched and connected with the split inner and outer support modules; (2) molding process: the light alloy cylindrical part is deformed by three phasesunder the effect of convex mold pressure: (1) a radial micro-necking deformation phase, (2) a radial large-necking deformation phase, and (3) a final molding phase; and (3) a necking cylindrical partis taken down after the extrusion molding is finished.

Description

technical field [0001] The invention relates to the technical field of plastic processing and forming of metal materials, in particular to an extrusion forming method of a "big belly and small mouth" type branch light alloy component. Background technique [0002] With the rapid development of my country's aerospace technology, high-tech weaponry and marine development, complex branch components (twig components refer to parts that protrude in the direction of material radius) are more and more widely used in various fields. ; Such as missile and satellite wing cabin sections with ribs or bosses, deep-water equipment shells (deep-sea exploration or operating cabins greater than 1,000 meters, deep-sea torpedo shells), missile fins for weaponry, artillery brackets, Forgings with complex shapes, such as armored vehicle bodies, etc., with holes and flanges in multiple directions. Among the branch components, there are many "big belly and small mouth" parts (that is, the diameter ...

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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, and provide a method for extrusion forming of branch-like light alloy components with a "big belly and small mouth", using the hot extrusion compression opening forming method to realize the "big belly and small mouth" complex The precision plastic forming of branch components can effectively overcome the problems caused by the existing traditional processing and manufacturing methods, improve the formability of light alloys, improve the comprehensive mechanical properties of formed components, greatly improve the utilization rate of materials, save energy and reduce consumption

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