声光调Q Nd:YAG脉冲激光修锐树脂结合剂CBN砂轮

DRESSING OF RESIN - BONDED CBN GRINDING WHEELS BY ACOUSTIC - OPTIC Q - SWITCHED Nd: YAG PULSED LASER

采用声光调Q Nd:YAG脉冲激光径向辐照,对树脂结合剂CBN砂轮进行修锐试验研究。研究了单脉冲激光辐照下,平均功率、脉冲频率和离焦量等参数对烧蚀凹坑深度的影响,由此可方便获得合适的激光修锐参数;分析了声光调Q YAG脉冲激光修锐树脂CBN砂轮的选择性去除机理。观察并比较了声光调Q脉冲激光、连续激光和机械法修锐后砂轮表面的地形地貌。试验表明声光调Q Nd:YAG脉冲激光径向辐照修锐树脂CBN砂轮,可获得更为良好的修锐效果。

Experimental studies on laser dressing of resin - bonded CBN grinding wheels by an acoustic - optic Q - switched Nd: YAG pulsed laser in wheels radial orientation were earned out. Hie effects of laser average power, focal position and pulse repetition frequency on the depth of wheels surface craters ablated by single laser pulse were studied, and thus obtained suitable laser dressing parameters . The selective removal mechanism of laser dressing were analyzed. The surface topography obtained after pulsed laser dressing, that after continuous laser dressing and also that after conventional mechanical dressing were observed and compared. The results showed that, dressing of resin - bonded CBN wheels by acoustic - optic Q - switched Nd: YAG pulsed laser in wheels radial orientation could bring out better dressing effect.