杯形薄壁梯形内齿轮旋压成形的机理  

Spin-Forming Mechanism of Cup-Shaped Thin-Walled Trapezoidal Inner Gear

作　　者：孙凌燕[1] 叶邦彦[1] 郝少华[1] 夏琴香[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2010年第2期49-54,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50475097);广东省自然科学基金资助项目(04105943);广东省科技计划项目(2006B11901001)

摘　　要：与传统筒形件流动旋压相比,杯形薄壁内齿轮旋压成形的变形机理十分复杂.为了提高内齿轮的成形质量,并为内齿轮成形参数的设计提供依据,文中采用数值模拟和工艺试验相结合的方式,从成形过程中材料的流动入手,对其变形机理进行了研究.结果表明:内齿轮轮齿的旋压成形过程是"镦挤"复合变形;变形分布具有周期性、不均匀性和不对称性;轮齿成形受工件转动方向影响,并且易出现成形缺陷.As compared with the conventional flow forming of tube-shaped parts, the spin-forming of cup-shaped thin-walled trapezoidal inner gear is more complicated. In order to improve the forming quality of inner gears and lay a foundation for the selection of forming parameters, numerical simulation and processing experiment were performed to analyze the material flow during the spinning and the corresponding forming mechanism. The results show that （ 1 ） the spin-forming of inner gears is an upset-extrusion process ; （2） the deformation distribution is periodical, nonuniform and dissymmetric ; （3） the forming of gear tooth is influenced by the rotation direction of the main spindle, and forming defects easily occur during the spinning.

关 键 词：旋压 梯形内齿 成形机理 材料流动 计算机模拟 

分 类 号：TG306[金属学及工艺—金属压力加工]