基于四点偏置法的非可展直纹面侧铣刀位计算  

Cutter Location Calculation Based on the Four Offset Method of Flank Milling for Undevelopable Ruled Surface

作　　者：严涛[1] 刘志兵[1] 王西彬[1] 樊勇[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《图学学报》2015年第6期840-845,共6页Journal of Graphics

基　　金：国家自然科学基金资助项目(51375055)

摘　　要：针对非可展直纹面五轴侧铣加工的问题,分析了非可展直纹面几何特点,根据等距映射下的极差不变性,提出了一种计算非可展直纹面叶片五轴侧铣刀位数据的新方法。以刀具包络面与设计曲面之间的整体误差为优化目标,建立了圆柱铣刀侧铣非可展直纹面的刀位计算方法,运用四点偏置法确定初始刀位,采用最小二乘法对初始刀位进行优化,建立刀轴矢量偏转模型进一步修正刀位以减小过切误差。通过实例计算分析,表明该方法可以在一定程度上减小加工误差。The existing method of five-axis flank milling to machine undevelopable ruled surface is researched, through the analysis of the geometric characteristics of the undevelopable ruled surface, a new method is proposed to calculate the cutter location data of five-axis flank milling with undevelopable ruled surface impeller. The global error optimization between the tool envelope surface and the design surfaces is the goal, and a method to calculate the cylindrical cutter location when flank milling the undevelopable ruled surface is established, putting forward a four-point method to determine the initial cutter location, optimizing it using the least squares method, establishing cutter correction model to further optimize the cutter location to reduce the over-cut error. By analyzing the example, it is proved that processing error can be reduced to some extent through this method.

关 键 词：非可展直纹面 五轴侧铣 四点偏置法 刀位计算 

分 类 号：TH161.1[机械工程—机械制造及自动化]