Method and device for inhibiting wall damage caused by laser processing

By using the detection laser beam to judge the penetration state in real time during laser processing and controlling the output of high-energy laser pulses, the problem of monitoring and protection of wall damage during laser processing of gas film cooling holes is solved, and precise monitoring and suppression of wall damage is achieved.

CN119703331AActive Publication Date: 2025-03-28XIAN MICROMACH TECH CO LTD
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Patent Information

Application Number
CN202510057806.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-14
Publication Date
2025-03-28
Estimated Expiration
2045-01-14

AI Technical Summary

Technical Problem

During laser processing of air film cooling holes, aircraft engine turbine blades are prone to damage to the wall, resulting in stress concentration and shortened service life, and it is difficult for the prior art to achieve accurate real-time monitoring and protection.

Method used

By collecting the laser pulse synchronization signal before the processing laser outputs the high-energy laser pulse, outputting the detection laser beam, and judging the penetration state based on the detected light signal, controlling the output of the high-energy laser pulse, real-time monitoring and protection of wall damage is achieved.

Benefits of technology

It effectively avoids wall damage, reduces dependence on solid model and clamping accuracy, solves the problem of slow response of laser processing online monitoring technology, and realizes accurate monitoring and suppression of wall damage.

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Abstract

The invention relates to a method and a device for inhibiting wall damage in laser processing, and belongs to the technical field of laser processing, and the method comprises the following steps: S1, before a processing laser outputs a high-energy laser pulse, collecting a laser pulse synchronization signal of the processing laser; wherein the frequency of the laser pulse synchronizing signal is synchronous with that of the high-energy laser pulse; s2, obtaining an acquisition period according to the laser pulse synchronization signal, and outputting a detection laser beam; s3, collecting the detection laser beam reflected by the processing position according to the collection period to obtain a detection light signal; and S4, performing penetration state judgment according to the detection light signal to obtain a laser pulse control signal, and controlling the next pulse output of the high-energy laser pulse according to the laser pulse control signal. According to the invention, the pulse interval of the high-energy laser pulse output by the processing laser is used for detecting and deciding and controlling the output of the high-energy laser pulse of the processing laser, so that the effect of radically inhibiting the damage of the laser to the wall is realized.
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