论文部分内容阅读
考虑蒸发效应、等离子体屏蔽效应与脉冲间能量累积效应基础上,建立脉冲激光烧蚀青铜金刚石砂轮传热物理模型,应用模型对脉冲光纤激光修锐青铜和整形金刚石分别进行传热数值计算,依据数值仿真结果,开展脉冲光纤激光烧蚀青铜轮和青铜金刚石砂轮的实验。理论研究和实验研究表明:相关条件下,当激光功率密度小于2.10×10~8 W/cm~2时,只能对青铜金刚石砂轮修锐;当激光功率密度大于2.10×10~8 W/cm~2小于2.52×10~8 W/cm~2时,能对青铜金刚石砂轮实现整形和修锐的合二为一;当激光功率密度大于2.52×10~8 W/cm~2时,能对青铜金刚石砂轮实现大深度修锐,但影响磨粒突出结合剂的高度和磨削性能,以上研究为脉冲激光烧蚀青铜金刚石砂轮研究提供理论指导与工艺优化,同时实验结果与数值模拟结果一致,也验证了传热模型的正确性。
Considering the evaporation effect, the plasma shielding effect and the energy accumulation effect between pulses, a heat transfer physical model of pulsed laser ablated bronze diamond wheel was established. The heat transfer numerical calculation of pulsed fiber laser sharpened bronze and plastic diamond were carried out respectively. Numerical simulation results of pulsed fiber laser ablation bronze wheel and bronze diamond wheel experiment. Theoretical studies and experimental studies show that when the laser power density is less than 2.10 × 10 ~ 8 W / cm ~ 2, the diamond grinding wheel can only be sharpened under the relevant conditions. When the laser power density is more than 2.10 × 10 ~ 8 W / cm ~ 2 is less than 2.52 × 10 ~ 8 W / cm ~ 2, the combination of shaping and sharpening can be achieved for the bronze diamond wheel. When the laser power density is more than 2.52 × 10 ~ 8 W / cm ~ 2, Bronze diamond grinding wheel to achieve a large depth of sharpening, but the impact of abrasive particles highlight the bonding agent height and grinding performance, the above study for the pulsed laser ablation of bronze diamond grinding wheel to provide theoretical guidance and process optimization, experimental results and numerical simulation results, Also verified the correctness of the heat transfer model.