FEM-based multi-scale modeling technology for the process of high-speed hard whirling of large lead screw with material of GCr15

High-speed hard whirling has been a import process for large thread part machining.However the study of its machining mechanism is inferior to its application,which has induced constraints for the improvement of the machining performance.After analyzing of the material properties of work pieces,cutting movement and process parameters,a series of key technologies of FEM-based modeling for high-speed whirling were prompted and summarized such as constitutive cutting equation for GCr15,chip separation and breakage criterion,interface properties of tool-chip,tool interaction wear,clamping contact surface properties,dynamic behavior of tool disk,a general FEM-based model for the process was investigated and accomplished at last.