Cold extrusion moulding process of aluminium alloy complex cup-shaped thin-wall part

Abstract

The invention discloses a cold extrusion moulding process of an aluminium alloy complex cup-shaped thin-wall part. The cold extrusion moulding process includes the steps that a male die and a female die are mounted on forging equipment which can be a 3150T electric screw press or a 2500T hydraulic press, the distance and offset of the dies are adjusted, and the dies are lubricated by lubricant industrial lard; a softened cold round bar stock with a diameter of 200mm is put into the female die under room temperature; under the pressure action of the equipment, the metal flows in the female die until the cavity is full of metal and the excess metal is extruded backward to the space between the male die and the female die, forming a flange at the opening of the forged piece; and after the stroke of the equipment is over, the metal no longer flows and forms the shape and the size of a final cold extruded piece. The cold extrusion moulding process has the advantages that the size and the property of the aluminium alloy forged piece produced through the process satisfy the requirement of the design drawing, the aluminium alloy forged piece has high surface roughness and dimensional precision; and most of all, the consumption of raw material is greatly reduced, the forging procedure is reduced, processing time is saved during the mechanical processing procedure and the processing period is shortened.

Description

technical field [0001] The invention relates to a cold extrusion process, and in particular provides a cold extrusion forming process for an aluminum alloy complex cup-shaped thin-walled part. Background technique [0002] Complex cup-shaped thin-walled parts are a type of parts in aero-engine products. The shape is a nonlinear thin-walled structure. The traditional forming method is to forge a nearly solid cylindrical shape on a free forging hammer after the bar is heated. Forgings, the material utilization rate is extremely low, often less than 5%. At the same time, the amount of machining is large and the production cycle is long. Contents of the invention [0003] The purpose of the present invention is to directly cold-head and extrude the bar at room temperature through a special mold to produce a cup-shaped thin-walled part whose shape is closer to the shape of the part. Compared with free forgings, cold extrusions can greatly save metal raw materials, reduce the a...

AI Technical Summary

Problems solved by technology

[0002] Complex cup-shaped thin-walled parts are a type of parts in aero-engine products. The shape is a nonlinear thin-walled structure. The traditional forming method is to forge a nearly solid cylindrical shape on a free forging hammer after the bar is heated. Forgings, the material utilization rate is extremely low, often less than 5%. At the same time, the amount of machining is large and the production cycle is long.

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