Method for forming slender bent irregularly-shaped hole in aluminum alloy casting

A technology of aluminum alloy castings and special-shaped holes, which is applied in the directions of casting mold components, casting molding equipment, casting molds, etc., can solve the problems of inability to make shells, difficult extraction of metal cores, and difficult shell making, etc. Difficult to extract effects

Active Publication Date: 2014-07-30
西安钢研高纳航空部件有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a precision casting forming method for aluminum alloy castings with slender and curved holes, so as to solve the difficulties in extracting metal cores and making shells difficult or even impossible to manufacture slender and curved holes relying on traditional metal cores. Shell and other problems, relying on the ceramic core to manufacture slender and curved holes, the problem of severe corrosion of the casting itself during core removal

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  • Method for forming slender bent irregularly-shaped hole in aluminum alloy casting

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Embodiment Construction

[0020] Case 1: Intermediate receiver

[0021] 1) Make stainless steel metal pipe fittings according to the shape and size of the slender and special-shaped hole in the casting diagram of the intermediate case. The diameter is 8mm, the pipe wall thickness is 1mm, and the material is 1Cr18Ni9Ti, which can ensure the stability of composition and size during the pouring process of aluminum alloy castings.

[0022] 2) Grinding, trimming and inspection of metal pipes;

[0023] 3) Put the metal tube into the wax mold and fix it, and carry out wax mold pressing;

[0024] 4) Seal the exposed hole at the end of the pre-embedded steel pipe with wax;

[0025] 5) Use X-rays to inspect the embedded parts in the wax mold;

[0026] 6) Carry out the production process of general-purpose aluminum alloy precision castings: wax mold trimming, assembly, shell making, dewaxing, shell roasting, melting and pouring, shelling, cutting and grinding, etc.;

[0027] 7) X-ray check whether the shape an...

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Abstract

The invention belongs to the field of precision casting of fired molds, in particular relates to a precision casting forming method for an aluminum alloy casting with a slender irregularly-shaped bent hole, and aims to solve the problems of difficulty in extracting a metal mold core, difficulty in manufacturing a shell, even incapability of manufacturing the shell and the like in a conventional process for forming a slender bent hole in the metal mold core as well as the problem of severe corrosion of the casting during core stripping in a process for forming a slender bent hole through a ceramic mold core. By adopting the method provided by the invention, the qualified molding of the slender bent irregularly-shaped hole in the aluminum casting can be ensured, and the size accuracy, surface roughness, wear resistance, erosion resistance and use strength of the slender bent irregularly-shaped hole in the aluminum casting can be enhanced.

Description

technical field [0001] The invention belongs to the field of investment precision casting, in particular to an investment precision casting forming method of aluminum alloy castings with slender and special-shaped curved holes. Background technique [0002] The application number CN201120322533 utility model discloses a casting shell for casting slender hole castings, which belongs to the investment mold; it aims to provide an investment mold that can obtain a complete casting without alkali boiling after casting. It consists of a core, a wax pattern coated on the surface of the core, a shell covered on the surface of the wax pattern, and a wax discharge flow channel on the shell; the core is composed of viscous wax filled in the wax pattern. Molding sand composition. The disadvantage of this utility model is that the dimensional accuracy and surface finish of the elongated holes of the casting formed by using the viscous molding sand are not high. [0003] When the invest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C9/22
Inventor 董茵海潮张凌峰郑元斌王斌周宝玲刘文娜梁晓锋
Owner 西安钢研高纳航空部件有限公司
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