青铜结合剂金刚石砂轮激光修锐试验研究

Experimental research on laser dressing of bronze bond diamond grinding wheel

用YAG脉冲激光对青铜结合剂金刚石砂轮进行修锐试验研究,为改善激光修锐效果,提出辅助交叉吹气的方法,实验研究了激光功率密度和离焦量对结合剂去除效果的影响.对修锐后的砂轮表面形貌显微观察表明,辅助交叉吹气方法有助于磨粒的暴露,有明显的修锐效果.同时,对修锐砂轮的磨削力测量结果表明,修锐后法向磨削力比修锐前下降10%～15%,切向下降5%～7%,比单独同轴吹气下降3%～5%,提高了砂轮的磨削性能.该结果为金属结合剂超硬磨料砂轮的激光修锐应用提供了理论与试验依据.

A new method to true diamond grinding wheel using Nd. YAG laser was presented, which used assistant side blowing to improve the laser dressing effects. Both modeling and experiment were conducted to investigate the effect of laser power density and focal offset on bond removal. The comparison between the surface topography on bronze bond diamond grinding wheel before and after laser dressing shows that using assistant side blowing can make the abrasives exposure more enough, and thus laser dressing can get effective dressing results. Meanwhile, the grinding force measurements were performed, and the results show that the grinding force decreases to 10%-15% in normal direction, 5%-7% in tangent direction, and the grinding force also decreases 3%-5% compared with the original method of inside blowing. And its grinding capability was improved effectively. The experimental research has provided an in-depth understanding of the relation between laser truing parameter and grinding quality, formed the laser dressing basis both in theory and experiment.