Abstract
Recently, servo presses have become widely used in manufacturing companies since they have the capability of high accuracy and free motion of the slide. This paper describes the optimum trajectory to achieve target values of the bottom dead point and the contact force between the slide and the die cushion (DC), and shows its implementation method. The optimum trajectory is derived using final-state control by dividing into two stages from the collision of the slide and DC until reaching the bottom dead point. Effectiveness from the viewpoint that controlled the DC load and the bottom dead point is shown by using two degrees of freedom control system as a method for following to the optimum trajectory.
