Study on methods of enhancing the quality, efficiency, and accuracy of pulsed laser profiling
Study on methods of enhancing the quality, efficiency, and accuracy of pulsed laser profiling
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DOI：
10.1016/j.precisioneng.2016.02.005
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发表时间：
2016-07
影响因子：
3.6
通讯作者：
Cong Zhou;Deng Hui;Genyu Chen
中科院分区：
文献类型：
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作者：
Cong Zhou;Deng Hui;Genyu Chen
采用脉冲光纤激光器对粗粒青铜结合剂金刚石砂轮切向仿形进行了系统的研究。本研究的目的是改善轮廓质量，提高轮廓过程的效率和准确性。我们的研究结果表明，当使用一个长的激光脉冲，石墨化后的轮廓是不可避免的。但是，在激光仿形过程中，通过从侧面向表面吹氩气，可以降低石墨化程度，从而提高仿形质量。较高的激光峰值功率导致较高的仿形效率。只有当激光切割深度等于砂轮的初始表面轮廓误差时，即，采用“深单层切割、步进进给切向激光仿形法”，可获得最高的仿形效率。提高激光峰值功率或激光扫描路径的重叠率可以提高仿形精度，而对质量没有明显影响。激光仿形后，砂轮表面的初始圆跳动和平行度误差分别由83.1和324.6 μm减小到6.8和3.8 μm。由于脉冲光纤激光器的峰值功率不够高，因此砂轮的表面轮廓精度略低于使用金刚石砂轮的轮廓精度。
A pulsed fiber laser was employed in a systematic study on the tangential profiling of a coarse-grained bronze-bond diamond grinding wheel. The goal of the present study was to improve the profile quality and enhance the efficiency and accuracy of the profiling process. Our results demonstrate that when using a long laser pulse, graphitization of the grain after profiling is unavoidable. However, by blowing argon from the side onto the surface during laser profiling, the degree of graphitization can be reduced, thereby improving the profiling quality. Higher laser peak power resulted in higher profiling efficiency. Only when the laser depth of cut was equal to the initial surface profile error of the grinding wheel, i.e., the “deep single layer cut, stepwise feeding tangential laser profiling method” was used, could the highest profiling efficiency be attained. Increasing the peak power of the laser or the overlapped rate of the laser scanning paths enhanced the profiling accuracy with no appreciable effect on the quality. After laser profiling, the initial circular runout and parallelism error of the surface of the grinding wheel were reduced from 83.1 and 324.6 μm to 6.8 and 3.8 μm, respectively. Because the peak power of the pulsed fiber laser was not sufficiently high, the surface profile accuracy of the grinding wheel was slightly lower than the profile accuracy using the diamond wheel.