基于刀具实际廓形的刀位轨迹计算方法  

Tool Path Calculation Method Based on the Actual Tool Profile

作　　者：赵萍[1] ZHAO Ping(Liaoning Province college of communication, Shenyang 110122, China)

机构地区：[1]辽宁省交通高等专科学校机电工程系,沈阳110122

出　　处：《沈阳理工大学学报》2017年第4期73-77,82,共6页Journal of Shenyang Ligong University

基　　金：辽宁省博士启动基金计划项目(20141172);辽宁省教育厅科研项目(L2014513)

摘　　要：为解决由于刀具磨损和制造误差对复杂曲面精加工的影响,根据刀具的实际廓形计算刀位轨迹,首先利用机器视觉测量系统检测刀具的廓形,从而获得实际刀具曲面,然后采用自适应等参数法规划加工路径,最后利用最小有向距离原理和曲面空间离散的方法计算刀具曲面和工件曲面的最小有向距离,通过调整刀具位姿,使刀具的刀触点恰好在工件的理论面上,从而得到优化的刀位轨迹。实验表明,采用这种轨迹计算方法编制的数控加工程序能够加工出满足精度要求的曲面。Due to tool wear and errors in the manufacturing process, calculating the tool path based on the tool theory model has a great deal of influence on the accuracy of surface finishing machining. In order to solve the above problem, the paper calculates the cutter tool path according to the actual profile of the cutter. Firstly, the tool profile is measured by the machine vision measurement system to obtain the actual tool surface, then the adaptive pa- rameters algorithm is used to plan the machining path, finally the minimal orientation -dis- tance of the cutter surface and the workpiece surface is obtained based on the minimal orien- tation-distance algorithm and curved space discrete algorithm. By adjusting the tool position, the cutter contact is set just on the workpiece theory, so as to optimize the tool path. The re- sults show that it can produce the surface meeting precision requirement with the NC pro- gramming by this method.

关 键 词：复杂曲面加工 刀位轨迹计算 机器视觉测量 最小有向距离算法 

分 类 号：TH164[机械工程—机械制造及自动化]