Manufacturing method of aero-engine aluminum alloy casing

Abstract

The invention discloses a manufacturing method of an aero-engine aluminum alloy casing. The method comprises the following steps that a titanium alloy pipe is welded into an oil-way pipeline to be cast into the aero-engine aluminum alloy casing in an embedding way to be used for forming a complex oil way in the aero-engine aluminum alloy casing, and finally, the sulfuric acid anodizing is carried out to obtain the aero-engine aluminum alloy casing capable of meeting design requirements. According to the manufacturing method of the aero-engine aluminum alloy casing, the defects that the weight of castings is increased and the sulfuric acid anodizing can not be carried out caused by a stainless steel pipe embedded casting process are overcome, and the defects that the time and materials are consumed in a copper pipe embedded casting process are overcome. The method can be applied to the manufacture of the aero-engine aluminum alloy casing cast with a complex oil way and surface sulfuric acid anodizing requirement.

Description

technical field [0001] The invention relates to a method for manufacturing an aviation aluminum alloy casting with complex oil passages, in particular to a casting and surface treatment method for an aluminum alloy casing of an aircraft engine with complicated oil passages. Background technique [0002] The case (case) is an important part of an aero-engine. Different types of aero-engines have cases of different shapes and structures, such as a fan case surrounding a fan in a turbofan engine, a turbine case surrounding a turbine in a turbojet engine, and so on. No matter what kind of casing, it usually has the characteristics of large size, thin wall and complex structure. For example, CN 102091757 A describes the characteristics of some casings, and proposes a casting method for integral casings suitable for casing parts. [0003] However, in fact, casing parts usually also include complex oil passage structures, which are usually directly formed in the casting during the...

AI Technical Summary

Problems solved by technology

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

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