Aluminum Alloy Die Casting Blank Precision Forming Technology

Abstract

The invention provides an aluminum alloy pressure casting blank precise forming process method. The method comprises the following steps that (1), a mould is fabricated according to the structure of acasting; (2), a wax mould, a pouring cup, a horizontal pouring channel, a straight pouring channel and an inner pouring gate are pressed through a wax injector, the wax mould is subjected to shape trimming, the wax mould is subjected to mould combination according to a combination diagram, and then the combined wax mould is subjected to oil removal; (3), the wax mould subjected to mould combination is subjected to multi-layer san suspension; (4), dewaxing is performed, a mould shell obtained after dewaxing is dried by 20 hours or more in the ventilation condition, the mould shell is subjectedto calcination in a chamber type electric resistance furnace, and the mould shell is inspected after the mould shell is cooled to the room temperature; (5), the washed mould shell is required to be subjected to a shell drying process; (6), sodium silicate-bonded sand is adopted for modelling, and then the sand mould is subjected to drying treatment; (7), a molten aluminum alloy is smelted, pressure-regulating pouring is adopted, when half of the crystallization period is reached, the temperature of the sand mould is lowered by 5-10 s, and the temperature of the sand mould is decreased by 2-4DEG C; (8), the casting is cleaned; (9), the casting is subjected to heat treatment.

Description

technical field [0001] The invention relates to the technical field of precision casting aluminum alloys, in particular to a process method for precise forming of aluminum alloy die casting blanks. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, marine aluminum alloy and chemical industry. Cast aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It has considerable market potential and is a new material. In the field of industrial use, it is second only to steel. With the development of modern industry and new casting technologies, the demand for cast aluminum alloys is also increasing. [0003] At present,...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of many surface holes, poor quality and mechanical properties, and high scrap rate of the produced aluminum alloy die castings, the purpose of the present invention is to provide a precision forming process for aluminum alloy die casting blanks, so that the aluminum alloy die castings Most of the holes in the aluminum alloy die-casting are evenly distributed inside the aluminum alloy die-casting, which effectively reduces the probability of the hole being exposed on the final surface, and at the same time reduces the aperture of the generated hole, improves the surface quality of the aluminum alloy die-casting, and strengthens the mechanical properties of the aluminum alloy die-casting , while greatly reducing the scrap rate