摘要
三角凸缘法兰轴套工件是汽车传动系统重要零件。在热锻成形工艺中,由于非对称结构和复杂的金属流动产生的应力集中对成品率造成严重影响。文章设计了一种新型三角凸缘法兰轴套预锻凸模结构,对热锻成形过程进行耦合仿真分析,分析了凸模结构参数对工件金属最大流程K和内应力σ的影响。结果表明,采用预锻制坯、闭式模锻预锻、终锻成形的工艺方案,坯料利用率显著提高。预锻凸模坡面起始点的设计需考虑凸模与坯料接触条件,坡面角度θ与金属最大流程K呈正相关,坡面的起始点与工件中心轴的距离L与金属最大流程K负相关。预锻凸模模具可满足工件成形要求。
Triangular flange shaft is an important component of automobile transmission system.Stress concentration induced by non symmetric structure and complex metal flow may affect the forming quality during hot forging.A new kind of pre forging punch structure for the triangular flange shaft was designed and verified through the thermal coupling simulation of hot forging.The influence of the punch structure parameters on the metal maximum flow K and internal stressσis analyzed to optimize the punch structure.The results show that the process of upsetting,pre forging and finish forging can greatly improve the utilization rate of blank.The slope angleθof punch has positive correlation with the metal maximum flow K,and the distance Lbetween the starting point of slope structure and the center axis has negative correlation with the metal maximum flow K.The design of punch must consider the contact condition of punch and blank.This pre forging punch structure can meet the requirements of the forming.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2016年第2期1-5,48,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51305116)
安徽省合芜蚌自主创新试验区专项资助项目(20130205)
关键词
三角法兰轴套
金属最大流程
凸模结构
损伤
triangular flange shaft
metal maximum flow
punch structure
damage
