A reverse laser peening multi-element control method and device

Abstract

The embodiment of the invention discloses a multiple-unit control method and a multiple-unit control device for reverse laser shot peening. The region area and impact depth of laser shot peening treatment are reasonably designed by virtue of the modification characteristic of a surface layer material generated through laser shot peening, and a laminated section is constructed to change the Young moduli of parts, thus the inherent frequency is changed, and the dual purposes of reinforcement and frequency modulation treatment are realized; moreover, modelling analysis is carried out through a mechanical model to optimize a sizing region and parameters with regard to the common problem of structure deformation in the laser shot peening treatment, and repair for the deformation of the parts is realized through reversely loading impact loads, thus the purpose of dimensional stability of the laser shot peening parts is achieved; and moreover, the multiple-unit control method and the multiple-unit control device are capable of meeting the various needs of rotating parts, and in particular, are suitable for high-speed rotating parts bearing aerodynamic loads, such as gas turbine blades, aviation engine blades and the like.

Description

technical field

[0001] The invention relates to the field of laser peening, in particular to a multi-element control method and device for reverse laser peening. Background technique

[0002] Due to the centrifugal force and inertial force when the high-speed rotating parts are working, each particle in the material is subjected to alternating stress loads. Although the stress on the parts is lower than the yield point of the material, cracks or sudden cracks are prone to occur after a long period of work. Fatigue failure with complete fracture. According to statistics, more than 80% of the failures of mechanical parts belong to fatigue damage, and there is no obvious deformation before fatigue damage, so fatigue damage often causes major accidents, such as gas turbine parking, aircraft engine air parking, etc. Therefore, parts subject to alternating loads should be manufactured with materials with better fatigue strength on the one hand, and material strengthening treatmen...

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