Die for composite cold extrusion forming of automobile micro motor aluminum shell and using method

Abstract

The die comprises a female die, a male die and an ejection material, the female die comprises a female die seat cushion block and a female die seat outside the female die seat cushion block, a clamping block is arranged on the outer side of the female die seat, the female die seat is internally provided with a female die cushion block and a bottom die, the female die cushion block is internally provided with a cushion head, and the ejection material is arranged on the male die seat. A male die structure is arranged in a die cavity of the bottom die on one side of the cushion head, the male die comprises a punching rod and a punching die seat cushion block, a material returning ejector rod is arranged in the cushion head, and a spring is arranged outside the material returning ejector rod. The method comprises the steps of (1) selecting a horizontal multi-connecting-rod toggle-rod type cold extrusion press, (2) manufacturing a female die, a male die and an ejection material, (3) manufacturing an aluminum blank, (4) treating the manufactured aluminum blank, and (5) conducting composite cold extrusion molding.Metal plastic deformation is good, the grain structure is more compact, and the mechanical properties such as tensile strength, compressive strength, bending strength and toughness are enhanced.

Description

technical field [0001] The invention relates to the field of metal forming, in particular to a mold for composite cold extrusion forming of an aluminum shell of an automobile micro-motor and a use method thereof. Background technique [0002] The aluminum casing of the automobile micro motor is a new product in the refined and lightweight metal casing industry. At present, there are two main production processes for forming aluminum shells of automobile micro-motors in domestic enterprises: one is die-casting, which heats the aluminum material and die-casts it in a die-casting mold; Stretching (usually 7~8 passes), multiple tempering to remove stress. The production process is complicated, the process is many, the energy consumption is high, the environment is poor, the production efficiency is low, and the manufacturing cost is high. Therefore, it is necessary to provide a new technical solution to solve the above problems. [0003] In the published document CN2011100601...

AI Technical Summary

Problems solved by technology

This is for multiple extrusions. The plastic deformation effect of the finished metal after extrusion is poor, and the tensile strength and bending strength also need to be strengthened.

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