精密复杂曲面零件多轴数控加工技术研究进展
徐金亭1, 牛金波2, 陈满森2, 孙玉文2
1. 大连理工大学 汽车工程学院, 大连 116024;
2. 大连理工大学 机械工程学院, 大连 116024
XU Jinting1, NIU Jinbo2, CHEN Mansen2, SUN Yuwen2
1. School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China;
2. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
关键词: 复杂曲面, 数控加工, 刀具路径, 进给率, 加工动力学
Abstract: Multi-axis Computer Numerical Control (CNC) machining is an iconic manufacturing technology in modern industry, which dominates the manufacturing of key components in the fields of energy, power, national defense, vehicles, aerospace, etc. In these fields, the requirement for high-end equipment is strict, so that a large number of precision and complex curved parts with considerable machining difficulty and tight performance tolerances have emerged. The machining requirements for these parts have been evolving from simple shape and position accuracy in the past towards high performance requirements that place equal emphasis on accuracy and performance. This brings severe challenges to the traditional CNC machining technology for complex curved parts. The state of the art and difficulties of the key technical issues such as accuracy guarantee, improvement of machining efficiency and control of the dynamic cutting process are discussed in terms of tool path planning, feedrate scheduling and dynamics analysis of CNC machining processes. Then, the feasible routes, breakthrough direction and future development trend are also expounded, so as to provide an effective reference and guidance for high performance machining of precision complex curved parts.
Key words: complex surface, CNC machining, tool path, feedrate, machining dynamics
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