热冲压成形工件冷却效果仿真研究(英文)  

Numerical study of cooling characteristics for blanking in hot stamping

作　　者：赖晨光[1,2] 满超[1] 文凯平 阎志刚[1] 段梦华 

机构地区：[1]重庆理工大学车辆工程学院,重庆400054 [2]Institute of Fluid Science, Tohoku University, Sendai 980-8577, Japan

出　　处：《机床与液压》2015年第6期27-31,共5页Machine Tool & Hydraulics

基　　金：supported by National Natural Science Foundation of China (51305477);2013 Program for Innovation Team Building at Institutions of Higher Education in Chongqing(KJTD201319);Part of the work was carried out under the Collaborative Research Project of the Institute of Fluid Science,Tohoku University,Japan

摘　　要：在热冲压加工过程中快速冷却高温成形件是一个关键问题。在加工模具中分别布置了2种不同的冷却水管:一种是光滑管,另一种是在光滑管内增加横挡板。通过对2种冷却方案的数值模拟,得到了2种方案工件的冷却效果,以及不同冷却管中冷却液的流动和换热情况。结果显示:内横槽管对工件的冷却效果要明显优于光滑管,其换热能力更强;当保压时间为10 s时,工件的平均温度比使用光滑管进行冷却时低12 K,对热冲压过程冷却水管的设计有重要的参考意义。Cooling down the high temperature of blanking rapidly is a key problem in hot stampmg procedure. Two different cooling tunnels were set in hot stamping mold, one was smooth inner wall, and another added trian- gle backup bars in it. Cooling performance for blanking in the two cases as well as the flow and heat transfer situa- tion of cooling water in two different tunnels were obtained after the numerical simulation. The result shows that, the cooling effect of inner backup bars tunnel is advantageous than smooth tunnel, and also the heat transfer abili- ty is stronger. For backup bars tunnel, the average temperature of work piece is 12k lower than that of smooth tun- nel while holding time is 10 s. For designing of cooling tunnels in hot stamping, this research also provided impor- tant references.

关 键 词：热冲压成形 数值模拟 冷却水管 强化换热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]