Casting method for aluminum alloy thin-wall fine-hole casting
An aluminum alloy, thin-walled technology, applied in the field of investment casting, can solve the problem that the deformed stainless steel pipe is not easy to take out, and achieve the effect of avoiding cracking
Inactive Publication Date: 2012-12-05
GUIZHOU ANJI AVIATION PRECISION CASTING
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Problems solved by technology
The use of the above embedded pipes is prone to deformation, and the stainless steel pipes are difficult to take out, etc.
Method used
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[0008] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0009] A casting method of an aluminum alloy thin-wall fine-pore casting, which mainly includes the steps of making a ceramic core, pressing a wax mold, making a shell, pouring, and cleaning the shell. 2mm-5mm, after the casting 1 is poured, the ceramic core is cleaned by high-pressure hydraulic sand cleaning, and after the ceramic core is removed, the excess material 3 at the thin-walled pores of the casting 1 is polished off by grinding.
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The invention discloses a casting method for aluminum alloy thin-wall fine-hole casting. The method mainly comprises ceramic core manufacturing, wax mold pressing, shell making, casting and shell cleaning. After wax mold pressing, 2-5mm thick wax is brushed at the thin-wall fine-hole position; and after casting is cast, high pressure hydraulic cleaning sand is adopted to clean the ceramic core and then grinding is adopted to grind off the excessive material at the thin-wall fine-hole position of the casting. According to the invention, the wall thickness at the thin-wall fine-hole position is increased in the casting process, to avoid cracking of thin-wall fine-hole of the casting during the ceramic core removing process.
Description
technical field [0001] The invention belongs to the technical field of investment casting, and in particular relates to a casting method of an aluminum alloy thin-wall hole casting. Background technique [0002] Aluminum alloy investment castings are mostly used in aviation parts. The structure is ever-changing, and the casting process for deep holes and narrow grooves is very difficult. For the casting of thin-walled aluminum alloy pores (aperture ≤ 5mm, wall thickness ≤ 3mm), it is impossible to directly use coating for casting. Usually pre-buried pipes are used for casting. Tubes include copper tubes, stainless steel tubes and quartz glass tubes. The use of the above embedded pipes is prone to deformation, and the stainless steel pipes are difficult to take out and other difficulties. When a ceramic core is used, it is easy to break the thin-walled pores of the casting when cleaning the ceramic core. Contents of the invention [0003] In order to solve the problems ...
Claims
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IPC IPC(8): B22C9/04B22C9/24
Inventor 曹建
Owner GUIZHOU ANJI AVIATION PRECISION CASTING