A hollow frame design and differential pressure casting method

Abstract

The invention discloses a hollow vehicle frame design and differential pressure casting method. The hollow vehicle frame design and differential pressure casting method comprises the following steps that 1, a hollow structure with the wall thickness being 4 mm and meeting 1.5 times of safety of CAE is designed; 2, an aluminum alloy is subjected to dual-phase treatment; 3, a sand core is casted ina sand core mold, then the casted sand core is put into a negative pressure differential pressure casting mold, metamorphic aluminum alloy liquid is molded through a negative pressure differential pressure casting process, the sand core is removed after molding, and a semi-finished product of a hollow vehicle frame is obtained; 4, the semi-finished product is subjected to T6 stage temperature rising heat treatment; and 5, machining is conducted through a large four-axis machining center. According to the hollow frame design and differential pressure casting method, the prepared product is small in weight, high in safety, excellent in tensile strength, yield intensity and extended performance and wide in application range, and batch continuous production can be realized.

Description

technical field [0001] The invention relates to the technical field of differential pressure casting, in particular to a hollow vehicle frame design and a differential pressure casting method. Background technique [0002] Aluminum alloy castings are mostly produced by resin sand molds, metal molds or die-casting methods, but there are always defects such as inclusions, shrinkage cavities, and porosity that are difficult to solve. This is because such casting methods are difficult to precisely control the speed, pressure, and temperature of the casting process, and problems such as unstable mold filling and alloy splashing often occur, resulting in poor castings and failing to meet high-performance technical requirements. Differential pressure casting is a kind of anti-gravity special casting technology, through the realization of alloy liquid filling, solidification and crystallization, and final molding under pressure. It is based on low-pressure casting, the casting mold...

AI Technical Summary

Problems solved by technology

[0002] Aluminum alloy castings are mostly produced by resin sand molds, metal molds or die-casting methods, but there are always defects such as inclusions, shrinkage cavities, and porosity that are difficult to solve

This is because such casting methods are difficult to accurately control the speed, pressure, and temperature of the casting process, and often have problems such as unstable filling and alloy splashes, resulting in poor castings and failing to meet high-performance technical requirements.

Images