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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

Active Publication Date: 2018-09-28
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a deep chemical milling method for large-scale structural parts of TA12 and TA15 titanium alloys, which uses titanium alloy deep chemical milling technology to complete the manufacture of titanium alloy integral, thin-walled, grid-shaped large-scale cylindrical structural parts, Satisfies the grid-like chemical milling structure of large cylinder parts; fundamentally avoids deformation caused by mechanical processing, solves the problem of strength reduction caused by welding, improves the overall rigidity of components, shortens production cycle, and reduces structural weight

Method used

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

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Effect test

Embodiment 1

[0059] In the present embodiment, the formula of chemical milling fluid is as follows:

[0060]

[0061] the rest is water;

[0062] Temperature 15°C.

[0063] The motor speed is 120 rpm, and the rotation direction of the motor is changed every 15 minutes. The wall thickness of the part is chemically milled from 10mm to 1.1mm, and the hydrogen content test result is 65ppm. After chemical milling, the surface of the TA12 titanium alloy part is smooth without irregularities. etch marks, pits and pits. The surface of the machined part is free of any dirt, residue, surface film and other unwanted items. The chemical milling line should be clearly defined, and whether the shape and size meet the requirements of the drawing.

Embodiment 2

[0065] In the present embodiment, the formula of chemical milling fluid is as follows:

[0066]

[0067] the rest is water;

[0068] The temperature is 28°C.

[0069] The motor speed is 125 rpm, and the rotation direction of the motor is changed every 15 minutes. The wall thickness of the part is chemically milled from 10mm to 0.9mm, and the hydrogen content test result is 55ppm. After chemical milling, the surface of the TA12 titanium alloy part is smooth and there is no irregular dip etch marks, pits and pits. The surface of the machined part is free of any dirt, residue, surface film and other unwanted items. The chemical milling line should be clearly defined, and whether the shape and size meet the requirements of the drawing.

Embodiment 3

[0071] In the present embodiment, the formula of chemical milling fluid is as follows:

[0072]

[0073] the rest is water;

[0074] Temperature 40°C.

[0075] The motor speed is 130 rpm, and the rotation direction of the motor is changed every 15 minutes. The wall thickness of the part is chemically milled from 10mm to 0.9mm, and the hydrogen content test result is 45ppm. After chemical milling, the surface of the TA15 titanium alloy part is smooth without irregular immersion etch marks, pits and pits. The surface of the machined part is free of any dirt, residue, surface film and other unwanted items. The chemical milling line should be clearly defined, and whether the shape and size meet the requirements of the drawing.

[0076] The results of the examples show that the present invention is applied in the manufacture of aero-engine parts, effectively guaranteeing product quality and meeting the requirements of design drawings. At the same time, the processing cycle o...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/04
CPCC23F1/04
Inventor 王辉滕志强侯广库杨树林孙士江
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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