Transactions of Materials and Heat Treatment

Title：Multi-ram forging process for unequal diameter valve body

Authors： Xu Wencui Song Changzhe

Unit： China 22MCC Group Co. Ltd.

KeyWords： unequal diameter valve body multiram forging process forming quality folding numerical simulation Deform-3D

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2018,43(7):121-128

Abstract：

According to the geometric characteristics and performance requirements of an unequal diameter valve body, two kinds of multi-ram forging schemes were designed. Then, the forming processes of two schemes were simulated by FE software Deform-3D, and the forming load, temperature field, equivalent strain field and forming quality of forging were compared and analyzed. The simulation results show that two forming technologies have little effect on the forming load, temperature field and equivalent strain field of forging, but they have a significant effect on the forming quality of forging. Furthermore, there is end-face folding and longitudinal flash defects in the formed forging of scheme 1, and the forming quality of forging is fine in scheme 2. Thus, according to the simulation result, scheme 2 is tested and verified on the 40 MN multi-ram forging production line. The results show that the metal material has good fluidity, the forging is fully filled, and the forming quality of three flanges and convex surfaces of forging are good without folding and longitudinal flash. The results are in good agreement with the simulation results.

Funds：

“高档数控机床与基础制造装备”科技重大专项-大型多向模锻制造共性技术研究（2012ZX04010082）

徐文翠（1988-），女，学士，工程师，E-mail：xuwencui121@163.com

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