自动换刀机构弧面凸轮建模与造型分析  

Modeling and Profile Analysis of Globoidal Cam in Automatic Tool Changer

作　　者：余剑武[1] 罗红[1] 舒新[1] 吴耀[1] 文丞 胡其丰 

机构地区：[1]湖南大学国家高效磨削工程技术研究中心,湖南长沙410082

出　　处：《机械传动》2017年第7期88-92,共5页Journal of Mechanical Transmission

基　　金：国家重大科技专项课题(2013ZX04008-021)

摘　　要：针对自动换刀机构中弧面凸轮工作廓面设计加工困难,分度期轮槽两侧廓面同时与滚子啮合的问题,以某加工中心的弧面凸轮为例,分析了弧面凸轮与分度盘的运动及位置关系,推导并修正了弧面凸轮的轮廓曲面数学方程;采用分段建模的方法,在Pro/E中编程分别创建弧面凸轮分度期、停歇期的各轮廓曲线簇,通过线面实体化造型,实现了弧面凸轮的精确建模。结合弧面凸轮廓面性能分析和加工实例,验证了该模型满足设计与加工要求,为提高其数控磨削加工精度提供了技术支持。Aiming at the problems of the work profile of globoidal cam in automatic tool changer（ ATC） is difficult to design,manufacture and both side of cam groove meshing with the roller in indexing period,taking the globoidal cam of a certain machining center as example,the motion and position relationship between globoidal cam and indexing plate are analyzed,the mathematical equation of globoidal cam contour surface is derived and modified. By using the segment modeling method,the cam profile curve groups in both indexing period and dwell period are created in Pro/E software. By the physical modeling of line and surface,the accurate 3D solid model of the globoidal cam is established. After globoidal cam profile performance analysis and machining practice,the designed globoidal cam model is verified to meet the design and machining requirements,which provides technical support for improving its finish grinding accuracy.

关 键 词：自动换刀机构 弧面凸轮 数学模型 分段建模 轮廓曲面 

分 类 号：TG596[金属学及工艺—金属切削加工及机床]