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Laser impact intensified on-line detection method and apparatus based on waveform characteristics of shock wave

A technology of laser shock strengthening and waveform characteristics, which is applied in the direction of measuring devices, ultrasonic/sonic/infrasonic generation, instruments, etc., to achieve the effect of strong practicability, small external influence, and accurate judgment

Inactive Publication Date: 2009-07-15
JIANGSU UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing detection methods in the laser shock peening process, and provide an online detection method and device with strong adaptability to the processing environment, stability and reliability, and low cost

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  • Laser impact intensified on-line detection method and apparatus based on waveform characteristics of shock wave
  • Laser impact intensified on-line detection method and apparatus based on waveform characteristics of shock wave

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Embodiment Construction

[0019] Combine below figure 1 , figure 2 The details and operation of the method and apparatus of the present invention are described in detail. The device for realizing the real-time detection method includes a laser generator 18, a photoelectric trigger circuit 4, a shock wave sampling circuit 6, an acoustic sensor device 7, an acoustic wave absorbing component 8, a control system 12, a five-axis workbench 15 and other auxiliary parts. In the online detection process of laser shock strengthening, the working steps to realize the method, as well as the specific functions and parameters of each part of the detection device are as follows:

[0020] (1) The photoelectric trigger circuit 4 is composed of the photosensitive element 1, its peripheral circuits and a trigger circuit. The laser 18 emits a short-pulse high-power laser beam 17, passes through the water confinement layer 16, and irradiates on the aluminum foil absorbing layer 2 to generate plasma luminescence. The ph...

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Abstract

The invention relates to an on-line detection method and device of laser shock processing effect, belonging to the machine manufacturing and laser device field, mainly suitable for the laser shock processing technology capable of increasing the mechanical performance of the parts. The on-line detection of the laser shock processing effect is performed by detecting the amplitude and pulse width of the shock wave spreaded in the air. The detection device comprises a photoelectric trigger circuit; a sound sensing circuit composed of three sound sensors and acoustic wave absorption device; a shock wave sampling circuit and other subsidiary components. The laser shock processing effect can be judged in complicated environment and the effective on-line detection of the laser shock processing effect is realized and the processing automaticity is increased.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing and laser devices, in particular to a laser shock strengthening online detection method and device based on shock wave waveform characteristics, which is mainly applicable to the laser shock strengthening process for improving the mechanical properties of key components. Background technique [0002] With the development of aviation, aerospace, automobile, energy, medicine and other technologies, laser shock peening technology has been widely researched and applied. Laser shock strengthening is to irradiate the absorbing layer on the metal surface with a short-pulse high-peak power laser, and the absorbing layer absorbs the laser energy to undergo instantaneous vaporization, evaporation, and ionization to generate high-temperature and high-pressure plasma. Due to the confinement of the confinement layer, the plasma will generate high-pressure shock waves to act on the metal surface, causing...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34G01N27/00
Inventor 张永康秦海永李杨周立春张朝阳
Owner JIANGSU UNIV
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