Trajectory planning of deep-cutting laser profiling of superabrasive profile grinding wheels
Trajectory planning of deep-cutting laser profiling of superabrasive profile grinding wheels
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DOI：
10.1016/j.jestch.2023.101581
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发表时间：
2023-12
期刊：
影响因子：
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通讯作者：
Hui Deng;Chuan He;Weiqi Liu;Wei Xiong
中科院分区：
文献类型：
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作者：
Hui Deng;Chuan He;Weiqi Liu;Wei Xiong
成形效率低是激光修整成形砂轮技术工业化应用的主要障碍。本文首次提出了深切割激光仿形加工的轨迹规划方法，建立了高斯激光束在仿形砂轮表面能量分布的理论模型，系统研究了该方法对提高超硬磨料仿形砂轮仿形加工效率的作用。通过对比实验，证实了轨迹规划方法能有效提高V形砂轮的仿形效率，并且发现刃尖角越小，效率提高越大。磨粒尺寸的变化会导致磨粒去除方法的改变，从而影响V形砂轮的仿形效率，但对仿形精度影响不大。对于粒度为20-180 μm的金刚石砂轮，激光仿形后V形刀尖圆弧半径可控制在10 ~ 20 μm之间，这是机械或电修锐方法难以实现的。该轨迹规划方法还可以显著提高凸/凹圆弧砂轮的仿形效率，且砂轮圆弧半径或弦径比越大，效率提高越大。即使凸、凹圆弧形砂轮尺寸相同，其成形效率和材料去除效率也有很大差异。对于不同圆弧半径或弦径比的砂轮，在激光仿形时应选择不同的工艺策略，以确保效率、精度和质量之间的综合平衡。
The low profiling efficiency is the key barrier to the industrial application of laser dressing technology for profile grinding wheels. In this paper, the trajectory planning method of deep-cutting laser profiling was proposed for the first time, the theoretical model of the energy distribution of the Gaussian laser beam on the surface of the profile grinding wheel was established, and the effect of this method on improving the profiling efficiency of superabrasive profile grinding wheel was systematically studied. Through comparative experiments, it was confirmed that the trajectory planning method could effectively improve the profiling efficiency of the V-shaped grinding wheel, and it was found that the smaller the tip angle, the greater the efficiency improvement. The change of grain size will lead to the change of grain removal method, which will affect the profiling efficiency of V-shaped grinding wheel, but it has little influence on the profiling accuracy. The V-tip arc radius of the diamond grinding wheel with a particle size of 20–180 μm after laser profiling could be controlled between 10 and 20 μm, which was difficult to achieve by mechanical or electrical dressing method. The trajectory planning method could also significantly improve the profiling efficiency of convex/concave arc-shaped grinding wheels, and the greater the arc radius or chord-to-diameter ratio of the grinding wheel, the greater the efficiency improvement. Even though convex/concave arc-shaped grinding wheels were the same size, their profiling efficiency and material removal efficiency were quite different. For grinding wheels with different arc radii or chord-to-diameter ratios, different process strategies should be selected during laser profiling to ensure a comprehensive balance between efficiency, accuracy and quality.