Superimposing method of circular light spot laser shock strengthening tracks

A technology of laser shock strengthening and light spot, which is applied in the field of laser shock strengthening treatment and superposition of circular spot laser shock strengthening track, which can solve the problem of superposition of circular spot laser shock strengthening track that has not been found.

Inactive Publication Date: 2009-09-23
西安天瑞达光电技术股份有限公司
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Problems solved by technology

No domestic published articles related to the superposition of circular spot laser shock strengthening trajectory

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  • Superimposing method of circular light spot laser shock strengthening tracks
  • Superimposing method of circular light spot laser shock strengthening tracks
  • Superimposing method of circular light spot laser shock strengthening tracks

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] The used laser shock strengthening device of the present invention is prior art: as figure 1 The shown laser shock strengthening device emits laser light from a high-power pulse laser 2, and divides the laser light into two identical laser beams by a 45° semi-transparent and semi-reflective beam splitter 5, and through a series of adjustments of 45° total reflection mirrors 6, the The focusing mirror 8 focuses the two laser beams with the same optical path respectively, and adjusts the position of the focusing mirror 8 so that the focused spot size and pulse width of the two laser beams irradiated on the front and back sides of the impact piece 7 are the same, and the light spots on the surface of the impact piece use Front focus spot. The controllable water nozzle 3 sprays water to form a uniform water curtain on the surface of the impact membe...

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Abstract

The invention discloses a superimposing method of circular light spot laser shock strengthening tracks, a double-sided impact laser strengthening system is used, an absorption protective layer of a shock piece is made of a non-transparent adhesive tape with colloid on one side or a metallic film, and water is adopted as a restraint layer of the shock piece; the superimposing rate of a shock light spot diameter is determined to be x%, the light spot diameter is D, and four shocks are performed; and the centers of adjacent light spots in each shock are at intervals of 2D(1-X%), the null points of two adjacent shocks are at intervals of D*(1-X%), and whether films need pasting again in each shock is determined according to the characteristics of the used protective layer material. The method avoids damage to the shock piece surface due to film fracture, and achieves the shock effect of light spot superimposition.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for superimposing circular spot laser shock strengthening tracks, which is suitable for laser shock strengthening treatment of parts with small curvature surfaces and the impact area is much larger than the focused laser spot. Background technique [0002] Laser Shock Processing, abbreviated LSP, also known as laser peening, is the use of high power density GW / cm 2 The short-pulse ns-level focused intense laser beam impacts the laser-absorbing protective film covering the metal surface. After absorbing the laser energy, the temperature rises rapidly, gasification, ionization, and explosion occur, and high-amplitude shock waves are induced, that is, light energy Converted into shock wave mechanical energy; the shock wave pressure up to several GPa causes the surface layer of the material to undergo ultra-high strain rate microscopic plastic deformation, forming a residual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00C21D1/09B23K26/064B23K26/352
Inventor 何艳磊李国杰李应红毋乃靓
Owner 西安天瑞达光电技术股份有限公司
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