Metal mold gravity casting process of aluminum alloy chassis rear axle bracket

Abstract

A metal mold gravity casting process of an aluminum alloy chassis rear axle bracket comprises the steps as follows: (1) optimization of a casting structure; (2) selection of a process scheme: a, selecting a parting surface; b, determining a pouring position; c, adopting a metal mold and sand core process; (3) design of a pouring system: adopting a bottom pouring open type pouring system to ensurethat the areas of all pouring gates are increased gradually towards an ingate; (4) design of a sand core and an exhaust system; (5) control of the mold filling speed. The process has the advantages asfollows: 1, castings have stable internal quality and high tensile strength; 2, the bottom pouring open type pouring system is adopted, the mold filling speed is decreased, and gas carrying and secondary oxidation slag inclusion preventing effects are good; 3, water cooling is set at hot node parts where risers are not suitable to adjust the mold temperature to realize simultaneous solidificationof castings.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a metal mold gravity casting process for an aluminum alloy chassis rear axle bracket. Background technique [0002] At present, with the continuous improvement of automobile energy saving and emission reduction requirements, it is one of the most effective methods to replace traditional steel with cast aluminum materials for chassis structural parts design. Chassis The rear axle bracket is the component with the highest safety requirements in the chassis system. One end of it is connected to the subframe and the other end is connected to the steering knuckle. Once it fails, it will directly threaten the life safety of the occupants. How to manufacture It is very difficult to produce a hollow thin-wall cast aluminum control arm product that meets the requirements of lightweight, and there are no successful precedents at home and abroad for reference. Contents of the invention...

AI Technical Summary

Problems solved by technology

Chassis The rear axle bracket is the component with the highest safety requirements in the chassis system. One end of it is connected to the subframe and the other end is connected to the steering knuckle. Once it fails, it will directly threaten the life safety of the occupants. How to manufacture It is very difficult to produce a hollow thin-walled cast aluminum control arm product that meets the requirements of light weight, and there is no successful precedent at home and abroad.

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