砂轮激光修整设备及参量选择的研究

Selection of equipment and parameters used in laser turing and dressing grinding wheels

为了选择合适的激光设备及参量,以便提高激光修整砂轮效率和精度,采用300W氙灯抽运YAG普通脉冲激光器、80W声光调Q YAG脉冲激光器对青铜金刚石砂轮进行了单脉冲和连续脉冲烧蚀试验,借助于显微镜分析了激光作用后砂轮表面的微观形貌,并通过理论推导,得出一组公式,在考虑砂轮修整精度和效率的前提下,有效地缩小激光器及参量的选择范围,有助于针对不同的砂轮选择更为合适的激光参量进行更有效的修整。结果表明,声光调Q YAG脉冲激光器比氙灯抽运普通YAG脉冲激光器单脉冲能量小、脉冲频率高、脉宽窄、峰值功率高,更适合用于砂轮的高精度、高效率修整。

Single-pulse and continuous-pulse ablation was carried on bronze-bonded diamond grinding wheels with 300W xenon lamp pumped YAG pulsed laser and 80W acoustic-optic Q-switched YAG pulsed laser respectively, in order to choose appropriate laser equipment and parameters for improving the efficiency and accuracy of grinding wheel turing and dressing. The morphology of the wheel surface after laser irradiation was analyzed by means of stereo microscope. Through theoretical derivation, a formula was obtained to reduce the option range of laser and parameters effectively under the premise of guaranteeing the accuracy and efficiency. It helps choose appropriate laser parameters for turing and dressing different grinding wheels more effectively. Compared with xenon lamp pumped YAG pulsed laser, acoustic-optic Q-switched YAG pulsed laser has lower single pulse energy, higher pulse frequency, narrower pulse width, higher peak power, so it is more suitable for high accuracy and efficiency turing and dressing of grinding wheels.