Research on New Thermal Hole Flanging Process of Connection Tube Forming in Heavy Nuclear Power Thick-wall Head
The hot hole flanging process of a connection tube in a thick-wall head was researched by finite element analysis and experiment in this paper. The deforming mechanism, main influencing factor and defects in hole flanging were analyzed. According to the stress state and the flow mode of deforming metal, the hole flanging process can be divided into two stages, that is, blending and hole flanging. Processing parameters, such as diameter of pre-holes, space ratio of die cavity, punch shape and size and their effect on forming were researched. With the increasing of pre-hole diameter, the height of the formed connection tube was decreasing and the wall thickness was increasing. With the increasing of the space ratio, the formed height was increasing variationally and the wall thickness was decreasing reposefully. The 1:3 scaled experiment was done in a 30MN hydraulic press using A508-steel. ⅢThe formed connection tube had a good quality and its end face was smooth without any crack. The measuring result showed that the error between simulation data and test data was less than 5%, which verified the feasibility of hot hole flanging process and provided an important reference for virtual production.
AN Hongping LIU Jiansheng
College of Material Science & Engineering, Taiyuan Science&Technology University, Taiyuan 030024, China
国际会议
桂林
英文
1-5
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）