论文信息 - A Comparative Study of Ultrasound Emission Characteristics in Laser Processing

A Comparative Study of Ultrasound Emission Characteristics in Laser Processing

Abstract The characteristics of two types of ultrasonic acoustic emissions observed in laser material processing involving melting, vaporisation and plasma generation are compared. These acoustic emission sources are: (a) ultrasonic airborne acoustic emissions due to plasma/vapour generation (acoustic nozzle), and (b) acoustic emission on the back of laser beam guide mirrors (acoustic mirror) due to laser beam back reflection. Both experimental work and theoretical analyses have been carried out to clarify the nature of the signals. A new interpretation of the “acoustic mirror” signal generation is given.

Lin Li | Lin Li

[1] Hongping Gu,et al. Resonant acoustic emission during laser welding of metals , 1996 .

[2] Martin Vicanek,et al. Oscillations of the keyhole in penetration laser beam welding , 1994 .

[3] W M. Steen,et al. Monitoring Of Laser Material Processes , 1986, Other Conferences.

[4] Ken Watkins,et al. In-process monitoring techniques for laser cleaning , 2000 .

[5] Yan Sang,et al. Relationship between airborne acoustic and optical emissions during laser welding , 1997 .

[6] Phiroze Kapadia,et al. Capillary waves on the weld pool in penetration welding with a laser , 1989 .

[7] W. Duley,et al. The effect of surface condition on acoustic emission during welding of aluminium with CO2 laser radiation , 1994 .

[8] William M. Steen,et al. Experimental study of the relationship between in-process signals and cut quality in gas-assisted laser cutting , 1990, Other Conferences.