等前角剐齿刀设计计算方法  

Design and Computation Method of Slicing Cutter with Equal Rake Angle

作　　者：李佳[1] 杨唐军 王鹏[1] 郑淑贤[1] 

机构地区：[1]天津大学机构理论与装备设计教育部重点实验室,天津300072

出　　处：《机械科学与技术》2017年第12期1877-1884,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：天津市科技支撑计划重点项目(16YFZCGX00130)资助

摘　　要：针对目前剐齿加工生产中加工工件表面质量差,左右齿面加工精度不一致的问题,提出了一种等前角剐齿刀的设计计算方法。根据待加工工件齿面的几何特征和剐齿加工的运动关系,基于曲面共轭原理,求取工件齿面共轭面;选择球面作为初始前刀面,以无理论刃形误差为目标,采用齿面共轭面与初始前刀面的交线作为切削刃;根据切削前角一致性原则对初始前刀面进行再设计,沿切削刃构造前刀面;通过模拟刃磨,求取一系列无理论刃形误差的切削刃,依次构造后刀面,最终获得完整的具有相等切削前角的剐齿刀具;通过计算实例验证该设计计算方法的可行性和有效性。In the view of the problems, the poor quality of machined surface and inconsistent machining precision of left and right tooth surfaces, the design and computation method of slicing cutter with equal rake angle is proposed. On beginning, the conjugate surface of gear surface is obtained based on the principle of conjugate surface according to the geometric feature of machining gear tooth surface and the motion relationship in slicing. Meanwhile, the sphere surface is chosen as the original rake face. To achieve the requirement of theoretical error- free edge profile, the intersecting curve of conjugate surface and original design rake face is calculated as the cutting edge. On the basis of those works, the original rake face is redesigned by constructing a new rake face along the cutting edge complying with the principle of consistent rake angle. With this method, a series of cutting edges with theoretical error-free edge profile are obtained by means of the simulative cutter sharpening, which are used for constructing the flank face. As a result, the complete slicing cutter with equal rake angle is obtained. The calculation case is performed to verify the feasibility and effectiveness of the above developed method. At last, the conclusion and discussion are provided.

关 键 词：齿轮刀具 剐齿刀设计 等前角 无理论刃形误差 

分 类 号：TH721[机械工程—仪器科学与技术]