微纳尺度下铣削力模型

The milling force model in micro-nano scale

为了真实反映微纳尺度下铣削力的变化规律,在充分考虑微铣削过程中刀具钝圆半径、最小切削厚度、弹性恢复等条件下,区分材料变形的剪切区和犁耕区,运用正交切削理论分区建立单元切削力,并由实验数据标定剪切区和犁耕区的切削系数,建立了一个新的微纳尺度下的铣削力模型.实验与仿真结果表明:新模型较真实地反映了微纳尺度下复杂的铣削力,修正了现有铣削力模型,为微切削加工机理研究、加工表面质量控制和刀具磨损的监测等提供了一定的参考依据.

In consideration of micro milling tool edge radius,minimum cutting thickness,elastic recovery and other conditions,using the theory of orthogonal cutting partition establishing unit cutting force,a new micro milling force model is established which distinguishes the material deformation of shear zone and ploughing area.The experimental and simulation results show that the new model can truly reflect the complex milling forces in micro-nano scale.It provides some reference for the research of the micro cutting mechanism,the surface quality control and the tool wear monitoring.