Method and system for setting the hydraulic pressure influencing a grab member

摘要

PCT No. PCT/FI91/00204 Sec. 371 Date Dec. 30, 1992 Sec. 102(e) Date Dec. 30, 1992 PCT Filed Jul. 1, 1991 PCT Pub. No. WO92/00913 PCT Pub. Date Jan. 23, 1992.The object of the invention is a method and a system for setting the hydraulic pressure influencing a hydraulic grab member by using adjustment members. The setting of the maximum value of the pressure takes place automatically by reading the identifying information on the piece (6) being handled by means of a reading device (1), on the basis of which the control unit (3) linked to the reading device (1) directs the adjustment member (4). When the operator of the system starts raising the hydraulic pressure from the hydraulic tank (13) by means of the operating valve (9) of the grab member (5), the adjustment member (4) limits the hydraulic pressure going to the compression cylinder (8) of the grab member (5) and thus a compressive force of the correct magnitude is directed onto the piece (6) being handled.