Low-pressure cast aluminum-alloy wheel-casting sequential-solidification temperature-field compensating method

Abstract

The invention relates to a low-pressure cast aluminum-alloy wheel-casting sequential-solidification temperature-field compensating method, wherein the areas of a mould needing temperature compensation are found out by simulating solidification for casting before product casting, the areas are generally positioned at a top mould and a side mould according to the casting characteristics of an aluminum-alloy wheel, a heating resistance wire and a thermocouple are installed at the top mould and the side mould when the mould is developed, the heating resistance wire and the thermocouple are connected with a low-pressure casting-system control cabinet, the mould temperature is set according to the technical requirements of casting processes, and when the mould temperature reaches the technical requirements, the heating resistance wire stops working; and when the temperature is insufficient, the heating resistance wire begins to work, thereby the temperatures of the side mould and the top mould which are after-cooled are guaranteed to be balanced, the sequential solidification of molten aluminum is guaranteed, casting defects are reduced, and compared with a traditional process, the method is a more economical and practical method for guaranteeing casting sequential solidification.

Description

technical field [0001] The invention relates to the field of casting of aluminum alloy wheels for automobiles, in particular to a method for compensating the sequential solidification temperature field of low-pressure casting aluminum alloy wheels. Background technique [0002] At present, the annual demand for automobile aluminum alloy wheels in the world has reached 500 million pieces, of which aluminum wheels account for about 60%, that is, the annual demand is 300 million pieces. In 2009, China's annual output of aluminum wheels reached 70 million pieces, becoming the world's largest manufacturer and consumer of aluminum wheels for automobiles. [0003] Although the manufacture of automobile aluminum wheels has achieved rapid development in China in recent years, the domestic aluminum wheel manufacturing technology level is only at the middle level in the world, especially the casting level. The gap is huge. The important factor affecting the casting level is that the ...

AI Technical Summary

Problems solved by technology

[0003] Although the manufacture of automobile aluminum wheels has achieved rapid development in China in recent years, the domestic aluminum wheel manufacturing technology level is only at the middle level in the world, especially the casting level. Huge gap

The important factor affecting the casting level is that the molten aluminum fails to solidify in sequence during the casting process, which eventually leads to the existence of a large number of pores, porosity, and shrinkage cavities. In order to solve the above problems, the domestic aluminum wheel casting industry often adopts adjustments. Adding cooling air ducts to nodes, increasing blank wall thickness, and adding dark risers to ensure the sequential solidification of molten aluminum. Although the above methods can achieve certain results, they often cause problems such as increased blank weight, low casting yield, and increased manufacturing costs. , so the automotive aluminum wheel manufacturing industry urgently needs to find a more economical and practical way to ensure the solidification of the casting sequence

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