端面磨削动态热力耦合效应及对表面去除过程影响

针对端面磨削加工接触表面热力学分布特征提出一种基于动态热力耦合效应的理论建模方法.首先，建立多颗磨粒运动轨迹数学模型;其次，基于磨粒运动轨迹与磨粒高度的动态分布特征对加工工件磨削力进行解析求解;根据求得的磨削力，运用有限差分法(FDM)对端面磨削工件表面动态热力耦合过程进行分析;最后，分别采用有限元法(FEM)和端面磨削实验验证理论分析的合理性.结果表明:动态热力耦合的均一化程度会引起加工工件表面轮廓高度的差异性，减小砂轮转速可改善加工工件表面轮廓.

Dynamic Thermal Mechanical Coupling Effect in Disc Grinding and Its Influence on Workpiece Material Removal Process

A theoretical modeling method based on dynamic thermal mechanical coupling effect is proposed for the thermodynamic distribution characteristics of contact surfaces in disc grinding. Firstly， the mathematical model of movement trajectory of multiple abrasive grains is established. Then， the surface grinding force of the workpiece is modeled analytically based on the dynamic distribution characteristics of movement trajectory and the height of effective abrasive grains. Subsequently， the dynamic thermal mechanical coupling process on the workpiece surface is analyzed with the finite difference method (FDM) according to the grinding force. Lastly， the finite element method (FEM) and disc grinding experiment are applied to verify the rationality of the theoretical analysis respectively. The results show that the workpiece surface profile height is different due to the homogenization degree of the dynamic thermal mechanical coupling. The workpiece surface profile can be improved by reducing the speed of grinding wheels.