【摘要】 针对五轴侧铣精加工工艺,提出一种进给速度优化方法。该方法以直纹面模型描述刀轴运行轨迹以单位时间有效切削刃对应的刀轴对应线段扫掠面积(有效刀轴扫掠面积率)描述单位时间刀具切除材料面积(面积去除率),通过计算每一段数控程序的扫掠面积和执行该段数控程序所需的时间值,来调整该数控程序段的进给速度,使得五轴数控侧铣加工过程中有效刀轴扫掠面积率稳定,即面积去除率稳定,从而提高五轴侧铣切削加工过程中的稳定性,改善加工工件表面质量。通过一系列的加工对比试验,验证了所提出方法的有效性。更多还原

【Abstract】 A new method of feedrate optimization for 5-axis flank milling is introduced.Ruled surface model is used to describe the sw eep surface of cutter-axis.The area removal rate is replaced by the effective cutter-axis milling area rate(the area of the effective cutter-axis which corresponded to the cutting edge sw eep surface per unit time).The effective cutter-axis milling area of each NC block and the time needed to finish the NC block are calculated.The result is used to adjust the feedrate of the NC block to keep the effective cutter-axis milling area rate stable.Then the stability of milling process and the surface quality of the w orkpiece w ill be improved.A series of milling experiments verify the validity of the feedrate optimization method.更多还原