Design and implementation of five-axis transformation function in CNC system

作     者：Wang Feng Lin Hu Zheng Liaomo Yang Lei Feng Jinjin Zhang Han 

作者机构：Graduate University of Chinese Academy of Sciences National Engineering Research Center for High-End CNC Shenyang Institute of Computing Technology Chinese Academy of Sciences National Engineering Research Center for High-End CNCShenyang Institute of Computing TechnologyChinese Academy of Sciences University of Science and Technology of China The 15th Institute of China Electronics Technology Group 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2014年第27卷第2期

页      面：425-437页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0802[工学-机械工程] 

基　　金：supported by the National Basic Research Program of China (No. 2011CB302400) the Important National Science & Technology Specific Projects (No. 2013ZX04007031) 

主　　题：3D cutter radiuscompensation CNC software structure Five-axis transformationfunction Motion control Rotation tool center pointcontrol 

摘      要：To implement five-axis functions in CNC system, based on domestic system Lan Tian series, an improved design method for the system software structure is proposed in this paper. The numerical control kernel of CNC system is divided into the task layer and the motion layer. A five-axis transformation unit is integrated into the motion layer. After classifying five-axis machines into different types and analyzing their geometry information, the five-axis kinematic library is designed according to the abstract factory pattern. Furthermore, by taking CA spindle- tilting machine as an example, the forward and the inverse kinematic transformations are deduced. Based on the new software architecture and the five-axis kinematic library, algorithms of RTCP （rotation tool center point control） and 3D radius compensation for end-milling are designed and realized. The milling results show that, with five-axis functions based on such software struc- ture, the instructions with respect to the cutter＇s position and orientation can be directly carried out in the CNC system.