Casting process of pump valve casting

Abstract

The invention provides a casting process of a pump valve casting, relating to the technical field of casting. The casting process comprises the following process steps: (1) analyzing the structure of the pump valve casting, carrying out three-dimensional modeling and designing on the to-be-casted pump valve casting by virtue of three-dimensional software according to drawing requirements so as to fabricate an effect pattern; (2) slitting a three-dimensional model into a plurality of spliced modules according to the characteristics and casting requirements of a mold; (3) machining each spliced module on a numerical control machining device by virtue of polyurethane foam, and drilling a plurality of through holes in each module so as to facilitate the vacuuming in a modeling process; (4) adhering the modules into a whole, namely a specific mold, by virtue of double-faced sticky tapes, tightly inosculating junctures of the modules, and sending the mold into a modeling region to be modeled so as to obtain the pump valve casting. The casting process has the advantages that by carrying out mold modeling and splitting by virtue of the three-dimensional software, the size of a casting blank of the mold can be precise and stable, the reserved machining allowance is small, the profile-followed wall thickness of the mold is accurate, and the casting blank is lightened and the like.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting process for pump valve castings. Background technique [0002] The existing castings all adopt sand casting. Firstly, the inner and outer wooden molds are made according to the drawings and casting requirements, and the inner and outer wooden molds are respectively placed in clay sand to obtain the same clay sand inner mold and clay sand outer mold as the wooden molds. After the clay sand inner and outer molds are dried, the clay sand inner and outer molds are closed, and the smelted aluminum solution is injected. After the aluminum solution is fully solidified, the mold blank is taken out for deburring and sand cleaning. Due to the complex shape of some castings, the outer surface can realize the normal up and down demoulding, but the inner cavity can not realize the normal up and down demoulding, only the left and right demoulding can be used, so the inner cavity is m...

AI Technical Summary

Problems solved by technology

Because the V method has the advantages of good casting appearance quality, high precision, reducing environmental pollution, and improving the working environment of the workshop, it has been developed rapidly in recent years; but the V method casting process is only suitable for castings with simple structure and easy demoulding. For parts that are difficult or impossible to demould, some manufacturers adopt the method of lowering the resin sand core, which increases the consumption of raw materials and production time, and the surface of the billet inner cavity cannot achieve the advantages that the V method should have.