【摘要】 通过铣削力系数实验确立了螺旋端面铣削力模型,并分析了不同条件下拐角加工的铣削力变化。针对拐角的加工过程,应用刀具轨迹的方程与加工几何动力学的结合,得到了加工参数与拐角的坐标的关系,从而在保证切削力恒定的条件下,通过改变刀具的中心坐标与铣削参数,实现了拐角加工过程的优化,同时将优化的参数应用到实际的铣削过程进行比较。结果显示,拐角处的加工质量得到了显著提高。基于优化的加工参数,采用有限元程序对拐角的变形进行计算,证明优化后的参数对工件的拐角变形影响较小。更多还原

【Abstract】 This article presents a mathematical model of helical end-milling forces through experimental identification of the cutting coefficients and analyzes the changes of corner-milling forces under different conditions. In allusion to the corner-milling process,the relationship between working parameters and the corner coordinates is investigated by way of combination of tool tracing and cutting geometrodynamics. The milling parameters are optimized by changing the coordinates of tool center and working parameters without altering cutting forces. By applying the optimized parameters to milling practice,a comparison is made to show the improved product quality. Based on these optimized parameters,a finite element method (FEM) program is used to compute deformation values of a workpiece’s corner,which evidences few effects that optimized parameters can exert on the corner deformation.更多还原