Punching side blade is an important procedure of terminals die, its punching shape,concave die and convex die structure greatly impact the terminals on manufacture quality.

Approach to calculating method for determining double-drum crop flying shear s knife gap;

Applying mechanical principle,the torsional deformation laws of the drums and the characteristics of knife gap varying along the drum axes during the crop cutting,the function of M-T gears,and the structure characteristics of distributing gears and M-T gears such as positive s.

Application of non-standard side blade and its design of feeding material location, forming side blade and its design to punching parts side edge are introduced in progressive die.