作　　者： ; ; ; ;

机构地区： 上海交通大学机械与动力工程学院

出　　处： 《中国激光》 2005年第3期431-435,共5页

摘　　要： 激光辅助机械修整金刚石砂轮是一种金刚石砂轮修整新方法,它利用激光束加热砂轮表面使得金刚石修整笔的修整材料模式从脆性断裂变为塑性流动,从而提高砂轮表面修整质量,降低金刚石笔的磨损.运用ANSYS软件建立了激光辅助机械修整过程中金刚石砂轮温度场的有限元模型,并用热成像仪NEC TH7100WX/WV测量了实际工况下的温度场.结果表明,在相同工况下运用仿真模型所得分析结果与实测值拟合得很好.利用所建立的金刚石砂轮温度场的计算机仿真系统可对砂轮修整过程进行前期预测、工艺参数调整及优化等,避免加热温度过高使砂轮表面金刚石颗粒石墨化,或加热温度不足使砂轮表面硬度下降不够等情况的发生,从而减少了直接进行修整实验带来的盲目性. Laser assisted mechanical dressing and truing of diamond grinding wheel is a new truing and dressing method. The essential of the method lies in that laser irradiation makes deformation of diamond dresser material turn into ductile flow from brittle fracture, thereby improving the diamond wheel surface dressing and truing quality and reducing the wear of diamond dresser. A simulation model established by finite element methods using ANSYS software showed the distribution temperature field inside the diamond wheel. The actual temperature field under experimental condition is measured by infrared thermal imager (Model NEC TH7100WX/WV). The analyses show that the theoretical calculation results are consistent with those of experiments in the same experiment condition. The simulation model provides good effects on the quality forecast, parameter regulation and optimization in the process of truing and dressing diamond wheel. It also helps to avoid that high temperature make diamond grain graphitization or the temperature is not high enough to soften diamond wheel. The simulation model reduces the blindness to true and dress diamond wheel directly.

关 键 词： 激光技术 金刚石砂轮在线修整 有限元法 温度场

领　　域： [金属学及工艺] [金属学及工艺] [电子电信]