Method for operating forging hammer during forging of workpiece, involves compensating surplus energy position of upper tool when actual achieved starting height is above optimum starting height

摘要

The method involves detecting a return stroke speed and a return stroke acceleration of upper tools (15) by a sensor device (11). A braking function or acceleration and braking function is determined on the basis of the measured values and an optimal starting height (SSH). A control valve (8) of a controller (10) is controlled according to the determined brake function or the determined acceleration and braking function. A surplus energy position of the upper tool is compensated or eliminated, when the actual achieved starting height (TSH) is above the optimum starting height.