EQUIVALENT NORMAL CURVATURE APPROACH MILLING MODEL OF MACHINING FREEFORM SURFACES

作     者：YI Xianzhong MA Weiguo QIHaiying YAN Zesheng GAO Deli 

作者机构：School of Mechanical Engineenng Yangtze University Jingzhou 434023 China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University Beijing 100084 China Tianjin Pipe（Group） Corporation Ltd. Tianjin 300301 China Key Laboratory for Petroleum Engineenng of Ministry of Education China University of Petroleum Beijing 102249 China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2008年第21卷第3期

页      面：52-57页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

基　　金：China Postdoctoral Science Foundation(No.2005037348) Science and Technology Research Program of Hubei Province,Ministry of Education,China(No.D200612003) 

主　　题：Equivalent normal curvature milling model Whirlwind milling method Freeform surfaces 5-axis CNC machine Differential geometry 

摘      要：A new milling methodology with the equivalent normal curvature milling model machining freeform surfaces is proposed based on the normal curvature theorems on differential geometry. Moreover, a specialized whirlwind milling tool and a 5-axis CNC horizontal milling machine are introduced. This new milling model can efficiently enlarge the material removal volume at the tip of the whirlwind milling tool and improve the producing capacity. The machining strategy of this model is to regulate the orientation of the whirlwind milling tool relatively to the principal directions of the workpiece surface at the point of contact, so as to create a full match with collision avoidance between the workpiece surface and the symmetric rotational surface of the milling tool. The practical results show that this new milling model is an effective method in machining complex three- dimensional surfaces. This model has a good improvement on finishing machining time and scallop height in machining the freeform surfaces over other milling processes. Some actual examples for manufacturing the freeform surfaces with this new model are given.