Patent ID: 8631742
Filing Date: 2014-01-21
Classification: B30B

Abstract:
1. A method for operating a press or a line of presses in which a workpiece is transferred from one press to another press, each press comprising a ram and a die, the method comprising controlling stroke of each ram according to a function f(x) =a(0)/2 +a(1)*cos(1*x) +a(2)*cos(2*x) +. . . +a(n)*cos(n*x) +b(1)*sin(1*x) +b(2)*sin(2*x) +. . . +b(n)*sin(n*x), thereby actively influencing at least one stroke rate of each ram, position of each ram defined in terms of time or path, driving force of each ram, speed or acceleration of each ram, minimum freedom of motion of each press, transfer movement from one press to another press so as to achieve smaller strokes together with an optimized and sufficient freedom of motion of each press.