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    • 3. 发明授权
    • A METAL SHEET PRESS-BENDING MACHINE
    • BIEGEPRESSE
    • EP1011886B1
    • 2002-01-23
    • EP97945096.2
    • 1997-10-16
    • Gasparini, Luciano
    • Gasparini, Luciano
    • B21D5/02
    • B21D5/02Y10S72/702
    • A press-bending machine to bend metal sheets, having improved features in the respective press-bending with measuring and control system operating on at least four points of the bending angle, of the type in which the press-bending machine has: an upper vertically reciprocal elongated bending punch (2, 101); a lower static elongated bending matrix (5-102) with at least a longitudinal bending groove (5'-102'); feeler means to measure the respective bending movement of the metal sheet in bending inside said bending groove, to control by data process logic unit the bending parameters of bending process in said bending machine, said feeler means operating with at least four bending detection points, characterized in that all said detecting points are conceived in such a way to be divided in two sets of bend detecting points, one to one side (6-9''; Rc-Rt left ; 18'; 108'-107'; 109'-1010') and one to the other side (7-9'''; Rc-Rt right ; 18''; 108-107; 109''-1010'') and in symmetrical way divided in number and position respective to the vertical plane passing along the respective sheet bending line corresponding with the bending corner of the resulting bent sheet.