Engine aluminum cylinder body low-pressure casting method

Abstract

The invention discloses an engine aluminum cylinder body low-pressure casting method. Casting of an engine aluminum cylinder body is achieved through core manufacturing, molten aluminum processing and low-pressure casting. Compared with high-pressure casting having the defects that casting inner air holes can be generated easily, the organization is loose and insufficient casting exists, low-pressure casting has the advantages that the casting technology parameters of low-pressure casting can be adjusted at will within any technological range, it can be guaranteed that liquid metal is stable in model filling, the writhe, the impact and the splashing caused in the model filling process of the molten metal can be reduced or avoided, and therefore less oxidizing slag is formed, the defects of castings are avoided or reduced, and the quality of the castings is improved; model filling can be performed on the molten metal under the action of pressure, the fluidity of the molten metal can be improved, the forming performance of the castings is good, the castings with the contours clear and the surface smooth and clean can be formed easily, and large thin-wall castings can be formed more easily.

Description

technical field [0001] The invention relates to a method for casting an aluminum cylinder body of an engine, which belongs to the technical field of casting, in particular to a method for low-pressure casting of an aluminum cylinder body for an engine. Background technique [0002] At present, the cylinder block casting is a recognized cutting-edge technology in the domestic foundry industry. The complex structure of the engine aluminum cylinder block, the large wall thickness difference, the characteristics of the cast iron cylinder liner and the closed water jacket structure make this product still unable to be produced in China. The cast aluminum cylinder block meets the performance requirements, and it is easy to have defects such as pores and shrinkage during production. Since the cylinder block is one of the key parts of the engine, and the aluminum alloy engine is one of the important symbols of the lightweight of the automobile engine, the quality of the engine direc...

AI Technical Summary

Problems solved by technology

[0002] At present, cylinder block casting is a recognized cutting-edge technology in the domestic foundry industry. The complex structure of the engine aluminum cylinder block, the large wall thickness difference, the characteristics of the cast iron cylinder liner and the closed water jacket structure make this product still unable to be produced in China. The cast aluminum cylinder block meets the performance requirements, and it is easy to have defects such as pores and shrinkage during production