Shearing mechanism's optimal design for flying crank shear

Using the constrained optimization, random search, to optimize the bar lengths of crank mechanism of flying crank shear of Hot Rolling Factry, Baosteel Co.,Ltd, based in multi-body dynamics theory. We programmed in C++, calculated, and selected the best solution from a set of solutions we got. After optimization, the cutting angle and The difference between the instantaneous velocity and the average velocity in the cutting area of the shear are decreased.