A Deep Chemical Milling Method for Ta12 and Ta15 Titanium Alloy Large Structural Parts

A large-scale structural parts, chemical milling technology, applied in the deep chemical milling of TA15 titanium alloy large-scale structural parts, TA12 field, can solve the problems of shortening the production cycle, achieve the effect of reducing connection strength, improving efficiency, and good use
CN105483704BActive Publication Date: 2018-09-28SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Publication Date
2018-09-28

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Abstract

The invention relates to the field of deep chemical milling of titanium-alloy large-scale cylindrical parts, in particular to a deep chemical milling method of TA12 and TA15 titanium-alloy large-scale structural components. The deep chemical milling method comprises the following technological lines: degreasing, washing, pickling, washing, coating with a protecting adhesive, marking, removing a protecting adhesive film on a to-be-milled surface, chemically milling and conducting vibrating finishing. The method comprises the following steps: a titanium-alloy cylindrical part is processed into a thin-walled grid rib by adopting a deep chemical milling technology, and the thin-walled grid rib is primarily marked and chemically milled to obtain a chemical milling machine case shell with all mounting bases. The manufacturing of integral, thin-walled and grid-shaped titanium-alloy large-scale cylindrical structural components is completed by adopting the titanium-alloy deep chemical milling technology, and the requirement that the large-scale cylindrical parts are chemically milled to form the grid-shaped structure is met; and deformation, caused by machining, is avoided fundamentally, the problem of low strength caused by welding is solved, the overall rigidity of the component is improved, and besides, the production cycle is shortened, and the structural weight is reduced.
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Description

technical field

[0001] The invention relates to the field of deep chemical milling of titanium alloy large cylinder parts, in particular to a method for deep chemical milling of large structural parts of TA12 and TA15 titanium alloys. Background technique

[0002] In the stage of third-generation engines in foreign countries, composite material structure external casings began to be used, and in the fourth-generation engines represented by F119, relatively more titanium alloy chemical milling external casings were used. The main reason is that with the improvement of engine performance, the temperature of the airflow in the outer duct increases, and there is a bottleneck in the development of high-performance resin-based composite materials that can withstand higher temperatures. At the same time, titanium alloy chemical milling outer duct casings have mature application experience. High temperature resistance, and through continuous improvement, it can meet the requirements...

Claims

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