脉冲激光切向整形径向修锐青铜金刚石砂轮

Pulsed Laser Tangential Profiling and Radial Sharpening of Bronze-Bonded Diamond Grinding Wheels

对脉冲光纤激光切向整形和径向修锐青铜结合剂金刚石砂轮技术进行了理论分析和试验研究。理论分析了激光切向整形和径向修锐青铜结合剂金刚石砂轮的机理,总结提出了决定脉冲激光修整效果的4个关键工艺参数:激光功率密度、激光光斑重叠率、激光扫描轨迹线重叠率及激光循环扫描次数。试验研究了这4个工艺参数对修整后砂轮表面磨粒石墨化变质层、磨粒磨削刃锋利程度、结合剂表面平整度及磨粒出刃高度的影响规律,并分别找到了在本试验条件下的理想值。

The technique of pulsed fiber-laser tangential profiling and radial sharpening of bronze-bonded diamond grinding wheels is studied theoretically and experimentally.The mechanisms for laser tangential profiling and radial sharpening of bronze-bonded diamond wheels are theoretically analyzed,and the four key processing parameters that determine the results of laser truing and dressing,including laser power density,overlap ratio of laser spot,laser scanning track line overlap ratio,and number of laser scanning cycles,are summarized and proposed.Furthermore,the effects of these four key parameters on graphitization-damaged layer of grains,sharpness of cutting edge graims,surface smoothness of bond,and mean protrusion height of the diamond grains after laser processing are experimentally studied.The ideal values of the laser power density,overlap ratio of laser spot overlap ratio,laser scanning track line,and number of laser scanning cycles are found under current experimental conditions.