Method for casting aluminum piston of gasoline engine

Abstract

The invention discloses a method for casting an aluminum piston of a gasoline engine. Based on the traditional gravity casting method, the method also comprises the following steps of: adopting powder metallurgy material with good air permeability to manufacture a mould; carrying out optimization and simulation on the structure of the mould and the casting technology by MAGMAsoft solidification simulation analysis software; after moldassembly, introducing inert gas into a mold cavity of the mould before the mould is poured; and carrying out gas pressurization on molten aluminum in the stage of piston solidification. The method further improves the casting quality of the piston, thus providing the aluminum piston of the gasoline engine which is suitable for various complex structures and high in explosion pressure, strength and performance.

Description

technical field [0001] The invention relates to a casting method of an aluminum piston of a gasoline engine, in particular to a casting method of a high-quality aluminum piston of a gasoline engine. Background technique [0002] With the continuous development of gasoline engine technology, higher and higher requirements are put forward for low emission, low fuel consumption and high explosion pressure. In order to meet the above requirements, foreign piston giants such as Mahle and KS have successively developed new casting processes for passenger car pistons and achieved certain success. Due to the complex structure and uneven wall thickness transition of car pistons, most of the top combustion chambers are cast, especially for some pistons with high explosion pressure and complex structures, it is difficult to guarantee the overall quality of the pistons by ordinary gravity casting technology. There is also no guarantee of quality stability during the casting process. T...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current car piston has complex structure, uneven wall thickness transition, and complex casting combustion chamber on the top surface, especially for some pistons with high explosion pressure and complex structure, it is difficult to ensure the overall integrity of the piston by using ordinary gravity casting technology. Quality, the stability and consistency of the quality cannot be guaranteed during the casting process. Provide a casting production technology for high-burst pressure, high-strength, high-performance gasoline engine aluminum pistons that can be applied to various complex structures, and further improve Casting method for casting quality of piston