Laser cleaning method for oxidation layer of titanium alloy part of aero-engine

A technology of aero-engine and laser cleaning, applied in cleaning methods and appliances, chemical instruments and methods, laser welding equipment, etc., can solve problems such as negative effects, achieve the effects of reduced production costs, high adaptability, and the elimination of hydrogen embrittlement risks

Inactive Publication Date: 2018-07-27
SHANGHAI JUNYI IND AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a laser cleaning method for the oxidation layer of titanium alloy parts of aero-engines, and solve the problem of negative effects caused by surface pretreatment by manual grinding or pickling

Method used

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  • Laser cleaning method for oxidation layer of titanium alloy part of aero-engine

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Embodiment 1

[0028] Such as figure 1 Shown, the laser cleaning method of the oxidized layer of the aero-engine titanium alloy ring part of the present invention comprises the following steps:

[0029] Step 1: Install the titanium alloy part 106 on the chuck of the rotary positioner, and control the distance between the scanning lens and the plane of the part to be cleaned through the mechanical arm, so that the focus of the laser is located near the oxide layer 105 to be cleaned, such as figure 1 shown;

[0030] Step 2: Select the laser cleaning parameters. The average output power of the pulsed laser is 100-250W, the laser wavelength is 1064nm, the pulse frequency is 10kHz, the minimum pulse width is 15ns, the line spot is 25mm, and the line of rotation of the surface of the part to be cleaned is cleaned. The speed is 12mm / s;

[0031] Step 3: Turn on the scanning galvanometer 101 and excite the laser. The laser beam passes through the scanning galvanometer 101 through the focusing lens ...

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Abstract

The invention relates to a laser cleaning method for an oxidation layer of a titanium alloy part of an aero-engine. The method comprises the following steps that laser cleaning parameters are selected, wherein according to the thickness and the surface state difference of the titanium alloy oxidation layer, the selected laser pulse width is 10 ns-100 ns, the laser wavelength is 532 nm-1064 nm, theaverage power of the pulse laser is 50 W-300 W, the pulse frequency is 10 kHz-30 kHz, and the linear speed of the rotation of the surface to be cleaned of the part during cleaning is 10-20 mm/s; andthe laser is introduced into a scanning galvanometer or a rotary polygon mirror from a laser device by adopting an optical fiber, spot light spots are shaped into a linear light spot, the length of the linear light spot is 8 mm-40 mm, an annular part and a laser cleaning lens are controlled through a control mechanism, and the linear light spot is enabled to move on the surface of the titanium alloy part oxidation layer. According to the method, the laser cleaning process is efficient and environment-friendly, and the material hydrogen embrittlement risk caused by a traditional acid pickling method is avoided.

Description

technical field [0001] The invention belongs to the technical field of surface cleaning, in particular to a laser cleaning method for an oxide layer of an aero-engine titanium alloy part. Background technique [0002] The aero-engine is an important part of the aircraft, and the performance of the engine directly affects the performance of the entire aircraft. In the field of aero-engines, titanium alloys are a new type of important structural material. Since the 1970s, the amount of titanium alloys in aero-engines has increased significantly, generally accounting for 20% to 30% of the total weight of the structure. At present, titanium alloys are mainly used to manufacture compressor components, such as forged titanium fans, compressor discs and blades, cast titanium compressor casings, intermediate casings, bearing housings, etc. [0003] The titanium alloy parts used in aero-engines have undergone heat treatment, so a dense oxide layer is formed on the surface of the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00B23K26/36B23K26/70
CPCB08B7/00B08B7/0035B08B7/0042B23K26/36B23K26/70B23K26/702
Inventor 吴金鹏
Owner SHANGHAI JUNYI IND AUTOMATION CO LTD
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