为了寻求超硬磨料砂轮的修锐新方法，采用脉冲光纤激光径向辐照，对青铜结合剂金刚石砂轮进行了修锐试验研究。理论分析了脉冲激光修锐青铜结合剂金刚石砂轮的基本原理；借助超景深3维显微系统和粗糙度测试仪，获得了脉冲光纤激光烧蚀青铜结合剂轮烧蚀凹坑的表面形貌和深度，总结了激光平均功率、脉冲重复频率和离焦量等参量对烧蚀效果的影响规律；根据试验结果选择最佳工艺参量（Pm ＝20W， f＝70kHz，Δ＝0.0mm），开展了激光修锐青铜结合剂金刚石砂轮的试验，并采用超景深3维显微系统对修锐后的砂轮表面形貌进行观测。结果表明，在合理工艺参量下，脉冲光纤激光径向辐照修锐青铜结合剂金刚石砂轮，可获得良好的修锐效果。%In order to find a new method to dress super-abrasive grinding wheels , experiments were carried out on bronze-bonded diamond grinding wheels with a pulsed fiber laser irradiating in radial orientation .Its basic principle was analyzed .After the ablation of bronze-bonded wheel by means of a pulsed fiber laser , the surface morphology and depth of ablated craters were observed by 3-D video microscopy system with super depth of field and surfagauge , and the influences of laser average power , pulse repetition frequency and defocusing amount on the ablation effect were summarized . According to the experimental results , the laser dressing experiments were carried out with the best process parameters (Pm =20W, f=70kHz,Δ=0.0mm), and the surface topography after laser dressing was observed by a 3-D video microscopy system with super depth of field .The results show that , dressing of bronze-bonded diamond grinding wheels with a pulsed fiber laser irradiating in radial orientation can bring out good dressing effect with the reasonable processing parameters .
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