Cutting forces with respect to different cutter orientations are analyzed for five-axis NC machining of a ball-end cutter.A measure is then defined to quantify the effects of cutter orientation variation.According to ...Cutting forces with respect to different cutter orientations are analyzed for five-axis NC machining of a ball-end cutter.A measure is then defined to quantify the effects of cutter orientation variation.According to the measure,a novel model and algorithm are proposed to wholly optimize cutter orientations based on a cutter contact(CC) point mesh.The method has two advantages.One is that the cutter orientation smoothnesses along the feed direction and pick-feed direction are both wholly optimized.The other is that only the accessibility cones of mesh points are required to compute and the computation efficiency is improved.These advantages are shown by simulating the machining efficiency,the stability of feed velocities and the smoothness of cutting force.A computational example and a cutting experiment are finally given to illustrate the validity of the proposed method.展开更多
文摘整体叶轮是由复杂空间曲面构成的五轴加工零件,其广泛的应用于航空航天的发动机、汽轮机、液压泵等设备,存在加工困难、加工质量难以保证等问题。为提高整体叶轮的加工效率和加工质量,在UG NX 8.0环境下进行整体叶轮的刀轨规划并生成刀轨文件,并在UG Post Builder模块中设置专用的后处理器以生成NC代码。研究结果为提高UG软件在多轴加工领域的应用,为合理规划整体叶轮加工工艺,提高叶轮的加工效率和加工精度提供了实际参考。
基金supported by the National Basic Research Program of China ("973" Program)(Grant No.2005CB724103)the National Natural Science Foundation of China (Grant No.50805093) the Science & Technology Commission of Shanghai Municipality (Grant No.07JC14028)
文摘Cutting forces with respect to different cutter orientations are analyzed for five-axis NC machining of a ball-end cutter.A measure is then defined to quantify the effects of cutter orientation variation.According to the measure,a novel model and algorithm are proposed to wholly optimize cutter orientations based on a cutter contact(CC) point mesh.The method has two advantages.One is that the cutter orientation smoothnesses along the feed direction and pick-feed direction are both wholly optimized.The other is that only the accessibility cones of mesh points are required to compute and the computation efficiency is improved.These advantages are shown by simulating the machining efficiency,the stability of feed velocities and the smoothness of cutting force.A computational example and a cutting experiment are finally given to illustrate the validity of the proposed method.
