QスイッチYAGレーザ加工音の周波数と除立特性

抄録

Sound is generated in laser beam machining. In the present paper, sound frequency characteristics and material removal rates are obtained using Q-switched YAG laser. The sound was monitored by a microphone with a frequency range of 4Hz-100 kHz. The generated sound frequency range is very wide and the highest frequency could not be measured by the microphone used in the experiment. Although the oscillation frequency of Q-switched laser is 1 kHz, the largest frequency component of the generated sound pressure level exists at 40-50 kHz for all materials used. The sound pressure level is dependent on the volumetric material removal rate ; there is a linear relationship between these values for each material. Furthermore, a microphone for audible sound is applicable to monitoring laser beam machining process because each frequency component has the same tendency for material removal characteristics.