Low-pressure casting process of aluminum alloy steering joint

A technology of low-pressure casting and steering knuckles, which is applied in the direction of steering mechanism, steering rod, transportation and packaging, etc. It can solve the problems that product accuracy cannot be effectively guaranteed, the density of castings is not enough, and there are many casting processes, etc., to achieve high structure density, The effect of good casting quality and high production efficiency

Inactive Publication Date: 2015-07-01
QINGDAO YUGUANG PRECISION CASTING FACTORY
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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

Method used

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Embodiment

[0014] The low-pressure casting process of the aluminum alloy steering knuckle of this embodiment includes the following steps:

[0015] (1) Selection and preparation of materials: A356 is used as the aluminum alloy material, and the A356 alloy ingot is put into a melting furnace for melting. After melting, the alloy liquid is modified and refined. Add Sr with a mass percentage of 0.045% to modify the aluminum liquid to refine the crystal grains when the aluminum liquid crystallizes; at the same time, use a rotary degasser to pass argon gas into the aluminum liquid for 13 minutes to degas the aluminum liquid. After the degassing is completed, the aluminum liquid is statically Set aside for 12 minutes; reduce the gas content in the aluminum liquid, and finally inject the treated alloy liquid into the holding furnace of the low-pressure casting machine for use;

[0016] (2) Product casting: low-pressure casting molds are used for casting; including: lower filter screen, mold cla...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B22D18/04B22D1/00B62D7/18
Inventor 陈玉光
Owner QINGDAO YUGUANG PRECISION CASTING FACTORY
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