Arrangement for presses

B - Operations – Transporting – 30 – B

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B30B 15/26 (2006.01) B21D 22/12 (2006.01) B30B 15/16 (2006.01) G05B 19/08 (2006.01)

Patent

CA 1147436

ABSTRACT OF THE DISCLOSURE The invention relates to a press arrangement of the kind in which forming depends on hydraulic pressure which varies during a pressing operation, comprising a pair of relatively mov- able components which are made to carry out a relative movement during the pressing operation, means for sensing the said movement and generating a control signal which, according to a functional relationship relevant to the pressing operation, depends on the sensed movement, and a hydraulic system for regulating by means of the control signal the hydraulic pressure during the pressing operation according to said functional relationship. Such a press arrangement is described in British Patent Specification No. 1,491,237. The invention provides a press arrangement which is characterised in that the said means comprise a manually program- mable electrical function generator which has a large number of contact points arranged in rows and columns for reproducing in an electrically readable form pairwise associated pressure and move- ment values constituting points in the relevant functional rela- tionship (p = f(s)), and which at its output is connected to the hydraulic system, while 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 move- ments covered and which makes the function generator read off in turn and in sequence and issue at its output the said pressure values as the movement values are reached.

325575

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