圆锥刀侧铣整体叶轮叶片曲面的刀轴轨迹规划  

Knife axis trajectory planning for integral impeller blade curved surface of conical tool flank milling

作　　者：阎长罡[1] 施晓春[1] 邓晓云[1] 

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《计算机集成制造系统》2014年第5期1114-1120,共7页Computer Integrated Manufacturing Systems

摘　　要：针对圆锥刀侧铣加工整体叶轮叶片曲面中复杂的刀轴轨迹规划问题,提出一种可行的刀轴轨迹生成方法。该方法首先根据两点偏置法给出初始的刀轴面,然后利用圆锥面的几何性质调整优化刀轴位置,"强制"刀具面与叶片曲面每瞬时线接触,建立以刀轴位置为变量的刀具面上多点与叶片曲面相切的超定方程组,并用最小二乘法求解。利用共轭曲面的数字仿真原理,以叶片曲面为基准面,以其上发出的标杆射线为纽带,建立刀具包络面与叶片曲面之间的误差计算模型,并给出加工干涉的判定依据。实例计算表明,刀轴优化后的包络误差显著降低,验证了所提方法的有效性。Aiming at the complicate knife axis trajectory planning in integral impeller blade curved surface of conical tool flank milling,a feasible knife axis trajectory generation method was proposed.This method was divided into two steps,the initial knife shaft surface was proposed according to the two-points offset method in the first step; the knife shaft position was optimized by using geometry properties of conical surface in the second step.Through forcing the each instantaneous contact of tool surface and blade surface line,an overdetermined system of the tool surface multipoint tangent to blade surface with knife shaft position as variable was established,and the least square method was used to solve this equation system.According to the digital simulation principle of conjugate surface,the error calculation model between the cutter envelope surface and the blade surface was built by using the blade surface as the datum plane and the benchmarking ray as a link.The decision basis for machining interference was also given.The example showed that the envelope error of the knife shaft was significantly reduced after optimization,and the effectiveness of the proposed method was also proved.

关 键 词：圆锥刀 侧铣 叶轮叶片 刀轴轨迹规划 共轭曲面 数字仿真 

分 类 号：TH161.12[机械工程—机械制造及自动化]