标题：Nonequivalent Milling of Roller Gear Cams Based on Approximation Method of Offset surface
作者：Ge Rongyu; Feng Xianying; Guo Peiquan
作者机构：[Ge Rongyu; Guo Peiquan] Univ Jinan, Sch Mech Engn, Jinan 250022, Peoples R China.; [Feng Xianying] Shandong Univ, Sch Mech Engn, Jinan 250061, Peop 更多
会议名称：International Conference on Manufacturing Science and Engineering (ICMSE 2009)
会议日期：DEC 26-28, 2009
来源：MANUFACTURING SCIENCE AND ENGINEERING, PTS 1-5
关键词：Roller gear cam; Approximation; Offset surface; NURBS; Nonequivalent; milling
摘要：The roller gear cam surface is manufactured with nonequivalent milling method in many cases, by which the machining error is unavoidable. In order to simplify the tool position, we can transform one problem approximating the designed surface with the tool envelope surface to another problem approaching the theoretical tool axis trajectory surface with the actual one. Furthermore, the theoretical tool axis trajectory surface, which is an offset surface of the designed cam surface, is reconstructed by the NURBS ruled surface. In order to find the best tool axis vector to minimize the machining error, a simple least square approximation method is established to figure out all the control points of the NURBS tool axis trajectory surface. A numerical calculation and simulation example is described to verify the effectiveness of the tool position method proposed in the paper.