Al2O3陶瓷的激光辅助磨削机理

Laser-Assisted Grinding Mechanism of Al2O3 Ceramics

针对氧化铝陶瓷难加工、加工表面质量差等问题,进行了激光辅助热磨削加工的研究.根据氧化铝陶瓷的热物理性能参数,分析了激光辅助磨削热加工机理,搭建激光辅助磨削加工实验系统,进行激光辅助磨削与常规磨削加工实验.采用扫描电子显微镜(SEM)和激光共聚焦分析加工后的工件表面.结果表明:采用激光辅助磨削加工氧化铝陶瓷可改变材料的去除方式,使陶瓷的脆性去除变为塑性去除;与常规磨削加工相比,加工表面形貌脆性断裂减少,表面粗糙度值更低,表面质量更好,砂轮使用寿命延长.

Aiming at the problems of difficult processing of alumina ceramics and poor surface quality,laser-assisted heating grinding was studied.According to the thermophysical performance parameters of alumina ceramics,the laser-assisted heating grinding mechanism was analyzed,a laser-assisted heating grinding experimental system was built,laser-assisted heating grinding and conventional grinding experiments were performed.The scanning electron microscopy(SEM)and laser confocal analysis were used to analyze the processed workpiece surfaces.The results showed that alumina ceramics can change the material removal method and make the ceramic brittle removal into plastic removal by using the laser-assisted heating grinding.Compared with conventional grinding,the morphology of the processed surface has less brittle fracture,lower surface roughness value,better surface quality and longer service life of the grinding wheel.