Laser micro-structuring of a coarse-grained diamond grinding wheel
Laser micro-structuring of a coarse-grained diamond grinding wheel
复制标题
粗粒金刚石砂轮的激光微结构
DOI：
10.1007/s00170-018-3101-8
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发表时间：
2019-04-01
影响因子：
3.4
通讯作者：
Zhu, Pengcheng
中科院分区：
文献类型：
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作者：
Deng, Hui;Xu, Zhou;Zhu, Pengcheng
针对粗晶砂轮磨削后工件亚表面损伤严重的问题，开展了纳秒级紫外激光粗晶金刚石砂轮微结构加工研究，探讨了工艺参数对磨削槽深、槽宽、微结构效率和微结构晶粒合格率的影响。结果表明，单次激光圆切割方法即使有任意大的扫描周期，也不能得到理想的凹槽尺寸。采用多道次激光圆切割方法可有效提高微结构效率，槽的宽度和深度随道次间距的增大而增大和减小。微结构晶粒的合格率与砂轮槽间距、砂轮表面晶粒分布、晶粒直径和砂轮槽宽度有关。在假设晶粒均匀分布于砂轮表面的情况下，随着槽距的增大，合格率先增大后减小。
To address the significant subsurface damage of a workpiece after grinding by a coarse-grained wheel, the research on nanosecond ultraviolet laser micro-structuring of a coarse-grained diamond-grinding wheel was carried out, and the influence of process parameters on the depth and width of the groove, the micro-structuring efficiency, and the qualification rate of micro-structured grains were explored. The results show that the single-pass laser circular cutting method cannot achieve the desired groove size even with an arbitrarily large number of scanning cycles. The multi-pass laser circular cutting method can effectively improve the micro-structuring efficiency, and the width and depth of the groove increased and decreased respectively with the increase of the pass spacing. The qualification rate of micro-structured grains was related to the groove spacing, the distribution of the grains on the surface of the grinding wheel, the grain diameter, and the groove width. Under the assumption that the grains were evenly distributed on the surface of the grinding wheel, the qualification rate first increased and then decreased with the increase of the groove spacing.