METHOD OF CONTROLLING THE RAM SPEED OF A PRESS RAM IN A SHAPING PRESS AND DRIVE DEVICE FOR A PRESS RAM

摘要

The present invention relates to a method of controlling a ram speed of a press ram of a metal-forming press, and a driving device, in particular for carrying out this method. According to the present invention, at least one energy storage device is connected to an auxiliary drive having connected thereto the main drive for controlling the ram speed, said energy storage device having supplied thereto the energy released during a negative acceleration of the press ram while from said energy storage device additional energy for the acceleration of the press ram during a further stroke is recovered and fed into the main drive via the auxiliary drive.