平面磨削淬硬薄工件磨削力研究  

Grinding Force of Surface Grinding Hardening Thin Workpiece

作　　者：张莹[1,2] 葛培琪[1] 张磊[1] 毕文波[1] 江京亮[1] 

机构地区：[1]山东大学机械工程学院,济南250061 [2]山东商业职业技术学院,济南250103

出　　处：《农业机械学报》2012年第8期231-234,197,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB706605;2009CB724403)

摘　　要：平面磨削淬硬薄工件实验测定的磨削力曲线呈现凸形,磨削后的工件表面呈现凹形,分析了曲线变化原因,并对磨削力变化进行了预测。通过磨削热力耦合有限元分析了工件变形,并对变形量影响磨削力的变化进行了分析。结果表明:工件变形导致磨削用量增大,是引起磨削力变化的主要原因,而且工件装夹方式对变形有很大影响。磨削力的变化又改变了流入工件的磨削热流密度,从而影响磨削温度场,导致磨削淬硬层分布不均。根据磨削力、磨削温度和工件变形之间的相互影响关系,通过逐步迭代法预测出磨削力变化曲线,并与实验曲线进行了对比。The grinding force curve always varied as convex in the surface grinding hardening thin workpiece. The workpiece became concavity on the ground profile. Through coupled thermal-mechanical FEM analysis, the variation of grinding magnitude caused by the grinding deformation was the main reason for grinding force variation. The mode of workpiece clamping exerted tremendous influence on the deformation. The grinding force variation affected the heat flux into the workpiece and the grinding temperature. As a result, the grinding depth is non-uniform. Through the relationship among the grinding force, grinding temperature and the grinding thermal deformation, the grinding force can be divided into intervals and be iterated. The predictable grinding force curve has good agreement with the experiment result and is useful to analyze the grinding hardening depth distribution.

关 键 词：磨削力 磨削淬硬 磨削温度 热变形 有限元 

分 类 号：TH16[机械工程—机械制造及自动化] TG580.13[金属学及工艺—金属切削加工及机床]