Online, efficient and precision laser profiling of bronze-bonded diamond grinding wheels based on a single-layer deep-cutting intermittent feeding method
Online, efficient and precision laser profiling of bronze-bonded diamond grinding wheels based on a single-layer deep-cutting intermittent feeding method
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DOI：
10.1016/j.optlastec.2015.12.021
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发表时间：
2016-06
影响因子：
5
通讯作者：
Deng Hui;Genyu Chen;He Jie;Cong Zhou;Du Han;Yanyi Wang
中科院分区：
文献类型：
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作者：
Deng Hui;Genyu Chen;He Jie;Cong Zhou;Du Han;Yanyi Wang
在这项研究中，一个在线的，高效的和精确的激光仿形方法，是基于一个单层深切割间歇进给方法。研究了激光切割深度和切割轨迹重叠率对激光仿形加工效率、精度和质量的影响。利用脉冲光纤激光器对青铜结合剂金刚石砂轮进行了在线仿形实验。结果表明，在激光仿形过程中，激光切割深度的增加导致材料去除效率的增加。然而，只有当激光切割深度等于砂轮初始表面轮廓误差时，激光仿形效率才达到最大。此外，选择相对高的轨迹重叠率的激光切割磨削砂轮的轮廓是有益的，在激光轮廓的精度的增加，而激光轮廓的效率和质量不受轨迹重叠率的变化。采用优化后的工艺参数进行在线激光仿形，砂轮表面的圆跳动误差和平行度误差分别从83.1 μm和324.6 μm降低到11.3 μm和3.5 μm。砂轮表面轮廓精度显著提高。理论上，激光仿形加工后，同类砂轮的最高表面轮廓精度完全取决于激光的峰值功率密度。激光峰值功率密度越高，砂轮仿形后的表面轮廓精度越高。
In this study, an online, efficient and precision laser profiling approach that is based on a single-layer deep-cutting intermittent feeding method is described. The effects of the laser cutting depth and the track-overlap ratio of the laser cutting on the efficiency, precision and quality of laser profiling were investigated. Experiments on the online profiling of bronze-bonded diamond grinding wheels were performed using a pulsed fiber laser. The results demonstrate that an increase in the laser cutting depth caused an increase in the material removal efficiency during the laser profiling process. However, the maximum laser profiling efficiency was only achieved when the laser cutting depth was equivalent to the initial surface contour error of the grinding wheel. In addition, the selection of relatively high track-overlap ratios of laser cutting for the profiling of grinding wheels was beneficial with respect to the increase in the precision of laser profiling, whereas the efficiency and quality of the laser profiling were not affected by the change in the track-overlap ratio. After optimized process parameters were employed for online laser profiling, the circular run-out error and the parallelism error of the grinding wheel surface decreased from 83.1 μm and 324.6 μm to 11.3 μm and 3.5 μm, respectively. The surface contour precision of the grinding wheel significantly improved. The highest surface contour precision for grinding wheels of the same type that can be theoretically achieved after laser profiling is completely dependent on the peak power density of the laser. The higher the laser peak power density is, the higher the surface contour precision of the grinding wheel after profiling.