基于等距特性的侧铣精加工刀位计算改进方法  

An Improved Algorithm for Tool Path Generation of Finish Flank Milling Based on the Offset Characteristics

作　　者：黄宇婷[1] 

机构地区：[1]北京工业职业技术学院,北京100042

出　　处：《机械科学与技术》2011年第5期850-852,共3页Mechanical Science and Technology for Aerospace Engineering

摘　　要：圆柱刀轴轨迹面与设计曲面的等距面之间的最大法向误差等于圆柱刀的包络面与设计曲面之间的最大法向误差。笔者利用此性质提出一种改进的刀轴轨迹面的直纹逼近的方法来获得高精度的侧铣加工刀位。其基本思想是找出与设计曲面等距面的最大误差最小的直线逼近,利用此方法得到一系列的直线段以后采用样条插值形成刀轴迹面,再通过限制弦高差对刀轴轨迹面进行离散获得最终的刀具路径。最后把所提出的方法应用到三元叶轮的五轴精加工刀位规划中,取得了较好效果。For a cylindrical cutter,the maximum normal error between tool axis surface and the offset surface of the designed surface is equal to that between the tool envelope surface and the designed surface.In this paper,we will use this special characteristic to develop an improved method to approximate the tool axis trajectory surface with ruled surface for high precision tool positioning in flank milling.The basic idea is to minimize the maximum error between a rule line and the offset surface of the designed surface.Then,a group of sections of line can be obtained to form a ruled surface by using B-spline interpolation.The final tool path is obtained by sampling this surface into a group of sections of line by limiting the chord error.Finally,the proposed method is used in 5-axis machining impeller blades to prove its effectiveness.

关 键 词：侧铣 叶轮 五轴加工 

分 类 号：TG540.6[金属学及工艺—金属切削加工及机床]