Low-pressure casting process of aluminum alloy steering joint

Abstract

The invention discloses a low-pressure casting process of an aluminum alloy steering joint. The process comprises the following steps: (A) a material is selected and prepared (A356 alloy is adopted; Sr with the mass percentage of 0.04-0.05% by the total quantity of alloy liquid is added to deteriorate molten aluminum so as to refine grains in the crystallization of the molten aluminum); (B) a product is cast by a low-pressure casting mold through the steps of descending of a filter screen, mold closing, liquid rising, mold filling, pressure keeping, opening of water cooling, pressure unloading, closing of water cooling, opening of an upper mold, ejection and part taking. The process mainly solves such problems as high equipment tonnage, complex procedures in manufacturing process and high material cost of a conventional aluminum alloy steering joint casting method, can produce casting products accordant with the requirements without needing expensive investment, is high in structure compactness of castings, is high in casting quality, and is high in production efficiency. Meanwhile, the molten metal is high in utilization rate; and the consumption of auxiliary materials is less.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a low-pressure casting process of an aluminum alloy steering knuckle. [0003] Background technique [0004] The low-pressure casting process of aluminum alloy steering knuckle includes at least the processes of lower filter screen, mold clamping, liquid raising, mold filling, pressure maintaining, water cooling, and pressure relief. In the current casting process of aluminum alloy steering knuckle, the finished casting density Not enough, further processing is required, not only the casting process is more, which affects the production capacity, but also the accuracy of the product cannot be effectively guaranteed, and the scrap rate is high. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems in the prior art, the object of the present invention is to provide a low-pressure casting process of alumi...

AI Technical Summary

Problems solved by technology

[0004] The low-pressure casting process of aluminum alloy steering knuckle includes at least the processes of lower filter screen, mold clamping, liquid raising, mold filling, pressure maintaining, water cooling, and pressure relief. In the current casting process of aluminum alloy steering knuckle, the finished casting density Not enough, further processing is required, not only the casting process is more, which affects the production capacity, but also the accuracy of the product cannot be effectively guaranteed, and the scrap rate is high