Velocity Preset and Transitional Zone＇s Shape Optimization for Tailor Rolled Blank

• Published in: 钢铁研究学报：英文版 no. 4; pp. 279 - 287
• Main Author: Dong-cheng WANG Lian-chao DONG Hong-min LIU Yan WANG
• Format: Journal Article
• Language: English
• Published: 2015
• Subjects: 垂直速度; 形状优化; 裁缝; 轧制力; 过渡区; 过渡曲线; 速度公式; 预置
• ISSN: 1006-706X; 2210-3988

Tailor rolled blank （TRB） is a type of emerging material to produce lightweight vehicle parts. Transitional zoners shape is an important parameter for tailor rolled blank. It not only affects mold design and the local carrying capacity of the stamping parts, but also determines the maximum value and variation characteristics of rolling force. How to get the best transitional zone＇s shape is a key problem for production of tailor rolled blank. A double power function is put forward using for transitional curve, which is continuous and smooth at all connection points inde- pendent of its parameters, so the sudden change of mechanical parameters during rolling and forming process can be avoided. At the same time, the velocity formula and restriction for arbitrary transitional curve are derived to preset vertical velocity of the roller and judge whether the curve can be rolled successfully or not. Then, the finite element method （FEM） is used to verify the precision of velocity formula and study the mechanical characteristics of different curves. Finally, a method to obtain the optimal curve equation is put forward and verified.