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Blade laser shock peening shape-control method with pulse widths variable in real time online

A technology of laser shock strengthening and blade, applied in the field of laser shock strengthening

Active Publication Date: 2018-03-13
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to propose an online real-time variable pulse width blade laser shock strengthening shape control method, aiming to solve the technical problem of laser shock strengthening with online real-time changes in laser parameters as the blade structure changes

Method used

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  • Blade laser shock peening shape-control method with pulse widths variable in real time online
  • Blade laser shock peening shape-control method with pulse widths variable in real time online
  • Blade laser shock peening shape-control method with pulse widths variable in real time online

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Embodiment

[0049] In the embodiment of the present invention, the blade laser shock strengthening shape control method with online real-time variable pulse width includes the following steps:

[0050] Collect and analyze the blade data, use the XL-640 X-ray stress measuring instrument to detect the stress distribution of the blade to be processed, and use the three-dimensional coordinate measuring instrument to scan to obtain the three-dimensional model of the blade. According to theoretical calculation and experimental judgment, the optimal pulse width range of the parts to be processed is deduced.

[0051] The blades of different materials and the pulse widths used at different wall thicknesses of the blades are different. In the embodiment of the present invention, the prefetch processing laser power density I is 3GW / cm 2 , then the ignition time of the aluminum material blade is:

[0052]

[0053] get t ig If it is about 5ns, the optimal pulse width time should generally be 3 t...

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Abstract

The invention discloses a blade laser shock peening shape-control method with the pulse widths variable in real time online. The method comprises the steps that acquisition and analysis are performed;a peening scheme is built so as to determine the pulse width values of different shock points; a control program is written; laser variable-pulse-width peening machining is performed; and a peening effect is detected. According to the technical scheme provided by the invention, compared with the prior art, in terms of complex curved surfaces and structures with non-uniform wall thicknesses of blades, the pulse widths can be changed in real time online as the blade structures change, it can be guaranteed that the optimal peening effect of different areas is achieved, and the situation that thepulse widths are overlarge, and consequentially, thermal damage and deformation out-of-tolerance of the blades are caused can also be avoided.

Description

technical field [0001] The invention relates to the field of laser shock strengthening, in particular to an online real-time variable pulse width laser shock strengthening shape control method. Background technique [0002] The blade is an important part of the aero-engine, which determines the performance, reliability and life of the engine. In addition, due to the complex operating conditions of the engine, the comprehensive performance requirements of the blade are high, and it is of great significance to improve the comprehensive mechanical performance of the blade. [0003] With the continuous development and maturity of laser processing technology, laser shock strengthening technology has become an effective means of blade processing and strengthening, which can greatly improve the comprehensive mechanical properties of blades. And the choice of laser power density has a direct impact on the effect of laser shock strengthening, and the laser pulse width also has a gre...

Claims

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Application Information

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IPC IPC(8): C21D10/00
CPCC21D10/005
Inventor 张永康杨丰槐张峥杨智帆于秋云
Owner GUANGDONG UNIV OF TECH
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