| 摘要 |
The hydraulic pressure in a press is varied during a pressing operation in dependence on the relative movement between a pair of press components. Means sense this movement and produce a control signal which, causes a hydraulic system to vary the hydraulic pressure during the pressing operation according to a functional press relationship. The sensing means comprise a manually programmable electrical function generator which has contact points arranged in rows and columns for reproducing in an electrically readable form pairwise associated pressure and movement values constituting points in the relevant functional relationship (p=f(s)), and which at its output is connected to the hydraulic system. Its input side is operatively connected, via a measurement transducer, to one of the said components for receiving a measurement signal (s) which is a measure of the movement and which makes the function generator issue at its output the said pressure values as the movement values are reached. <IMAGE> |
