Technique for embedding stainless steel tube in large-size aluminum alloy casting blank

Abstract

The invention relates to a technique for embedding a stainless steel tube in a large-size aluminum alloy casting blank, belonging to the technical field of casting. The technique comprises the following steps: manufacturing a wood mold with a pipe chase according to a drawing, and putting the wood mold into a sand box to manufacture inner and outer sand molds; halving the pipe chase according to the distribution and position characteristics of the pipe chase in the inner sand mold; inserting a connecting rod, of which the upper and lower ends are penetrated by binding wires, into the inner sand mold via a fraction distance point, connecting the upper end of the connecting rod to the sand box, and connecting the lower end of the connecting rod to a water pipe; closing the box, and casting; after the solution becomes solidified and cooled, removing the connection between the upper end of the connecting rod and the sand box to discharge; and cleaning by removing the exposed part of the binding wire at the lower end of the connecting rod, and taking out the connecting rod to produce the stainless steel tube embedded casting blank, wherein the connecting rod is preserved for later use. The invention is mainly used for casting home appliance mold casting blanks, has the advantages of low production cost and high casting blank yield, enhances the service performance of the molds, and greatly prolongs the service life of the molds.

Description

Technical field: [0001] The invention relates to the technical field of aluminum alloy casting, in particular to a process for pre-embedding stainless steel pipes in large aluminum alloy casting slabs. Background technique: [0002] The casting process of the existing household appliance mold billets is a green sand molding process; the household appliance molds are roughly divided into box type and type plate type, which are characterized by single casting, small batch size, large outline, external surface needs machining, and inner cavity In order not to process the surface; in the process of use, the mold needs to be heated by circulating water, which requires a heating pipe in the mold. There are currently two ways to place the heating pipe. One is that after the billet is formed, the casting Process the water pipe groove in the inner cavity of the billet, then put the water pipe into the groove, and then seal the pipe groove with a low-melting point alloy; Laborious an...

AI Technical Summary

Problems solved by technology

The reason why copper pipes are used in this process is that copper pipes have little heat deformation during casting and are easy to fix, but the disadvantage is that the cost of copper pipes is high; if stainless steel water pipes are used, the stress deformation after heating is particularly large during the casting process. It is easy to cause water pipe displacement or deformation. Since the casting process is a wet sand molding process, the strength of the sand mold is poor. After the water pipe is deformed, the box will collapse, resulting in the scrapping of the billet

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