Method for manufacturing aluminum material casing of engine

Abstract

The invention discloses a method for manufacturing an aluminum material casing of an engine; the method is to weld a titanium alloy pipe as an oil way pipe to embed and cast in an aluminum alloy casing of an aero-engine for forming a complicated oil way in the aluminum alloy casing of the aero-engine; and finally, the sulfuric acid anodizing treatment is performed to obtain the aluminum alloy casing of the aero-engine accordant with the design requirements. The manufacturing method of the aluminum alloy casing of the aero-engine, provided by the invention, prevents the defects of casting weight increment and incapability of the sulfuric acid anodizing treatment caused by a stainless steel pipe inlaid casting process, and prevents the defects of time and material consumption caused by a copper pipe inlaid casting corrosion process. The method can be applied to the manufacturing of the aluminum alloy casing, cast with complicated oil ways and having surface sulfuric acid anodizing requirements, of the aero-engine.

Description

technical field [0001] The invention relates to a method for manufacturing aluminum alloy castings with complex oil passages, in particular to a casting and surface treatment method for engine aluminum alloy casings with complicated oil passages. Background technique [0002] Case parts usually include complex oil circuit structures, which are usually formed directly in the casting during the casting process. For example, for the aluminum alloy case, because light materials such as aluminum alloy are prone to inclusions and shrinkage (hole) defects during the pouring process, the complex oil circuit in the casting is prone to oil leakage, which affects the pass rate of the casting , so the reliability of the casing is low, and the production cost is also high. [0003] For the formation of complex oil passages in castings, a kind of embedded casting process has been formed in the field of internal combustion engines. For example, a casting process of an internal combustion ...

AI Technical Summary

Problems solved by technology

The embedded casting process described in this document belongs to a completely different technical field for the manufacture of aero-engine casing parts of the present invention. First of all, what this document relates to is an internal combustion engine crankcase, and what the present invention relates to is an aero-engine aluminum alloy. Alloy casing, secondly, what this document involves is the casting of iron and steel materials, and there will be no defects in the casting of aluminum alloys and other light materials of the present invention, or even if there are similar problems in the casting of iron and steel materials, but due to The working environment of an internal combustion engine is not as severe as that of an aero-engine, and the requirements for these defects will not be as high as those of the aero-engine aluminum alloy casing of the present invention. Therefore, the process described in this document can only be used as a reference, and its The manufacture of the aero-engine aluminum alloy casing applied to the present invention still needs some creative transformations before the processes in different technical fields can be applied to the present invention