采用声光调Q Nd:YAG单脉冲激光径向烧蚀树脂结合剂超硬磨料砂轮,通过Taly表面粗糙度仪测量烧蚀凹坑深度,光学显微镜观察凹坑微观形态.理论分析了烧蚀凹坑的形成机理,试验建立起了凹坑深度与脉冲功率密度之间的关系曲线,研究了激光参量(平均功率、脉冲重复频率和离焦量)对烧蚀凹坑深度的影响.试验证明,以单脉冲烧蚀砂轮试验为指导,结合具体试验条件选择激光参量进行修锐,可得到满意的地形地貌.

Acousto-optic Q-switched Nd YAG pulse laser is employed to dress resin bonded superabrasives wheels in orthogonal direction. The crater depth of single pulse is measured by Taly surface roughness instrument and the surface morphology of ablated crater is observed by light microscope (LM). This рrфеr theoretically analyzed the formation of ablated crater, experimentally established the relation between the crater depth and pulse laser intensity, and studied on the crater depth influenced by laser parameters: average power, pulse repetition frequency and defocus distance. Experiment indicates that, on the basis of single pulse ablation on the wheels, a favorable topography is obtained by selecting suitable laser parameters.