Laser shock prediction method based on laser fluctuation and surface laser light scattering and device

Abstract

The purpose of the invention is to provide a laser shock prediction method based on laser fluctuation and surface laser light scattering and a device. The surface roughness of a part after impact is predicted through laser energy spatial distribution data measured in real time to set laser device input parameters; and the data of the surface roughness variation of the part is measured in real timethrough a laser scattering measurement method to correct the laser device input parameters in real time, so that the part finally meets the design requirements. The invention also discloses a laser shock reinforcing device based on the laser beam parameter fluctuation and part surface laser scattering measurement data, which comprises a computer, a laser shot blasting device, a part robot, a partrobot controller, a measuring laser device, a detector, and an information collecting system. The laser shock reinforcing device based on the laser beam parameter fluctuation and the part surface laser scattering measurement data can perform laser shot blasting through the real-time variation of the laser energy data and the change of the surface roughness data of the part to improve the surfaceprecision.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a device based on a laser shock prediction method based on laser fluctuations and surface laser scattering. Background technique [0002] Aeroengines are known as the "Flower of Industry". The engine blade is its core. The aero-engine is a typical high-precision, variable-section thin-walled part. Its quality directly determines the safety and reliability of the aero-engine. Laser shock peening will inevitably increase the surface roughness during the processing of the blade, and the increase in the surface roughness of the blade will weaken the mechanical properties of the blade, which will greatly reduce the safety, reliability and fatigue strength of the aero-engine. In addition, it is impossible to observe the change of the surface morphology of the part during the impact process, and after the impact is over, the surface of the part is difficult to repair, resulting ...

AI Technical Summary

Problems solved by technology

Laser shock strengthening will inevitably increase the surface roughness during the processing of the blade, and the increase in the surface roughness of the blade will weaken the mechanical properties of the blade, which will greatly reduce the safety, reliability and fatigue strength of the aero-engine.

In addition, it is impossible to observe the change of the surface morphology of the part during the impact process, and after the impact is over, the surface of the part is difficult to repair, resulting in the scrapping of the part

[0003] The existing technology can only use flat-hat beam laser to impact, and the laser energy myopia is considered as uniform distribution. Although compared with Gaussian beam, flat-hat beam has more advantages for laser peening, but the spatial distribution of laser energy of flat-hat beam Still very uneven, resulting in extremely poor and uneven surface roughness of the part after impact

Images