| 摘要 |
An apparatus for bending in particular plate-shaped workpieces comprises (1) a die (2) and a punch (5) having a punch end with sloping flanks, which define a bending line extending in the longitudinal direction of the punch and a V-shaped cross-section. A driving unit moves the die and the punch relative to each other in a bending operation direction so as to carry out a bending operation. A measuring device (6) for measuring a bending angle of the workpiece comprises a housing (7) having an end whose shape corresponds to that of the end of the punch, such that at least the bending line (13) of the housing is in line with that of the punch, wherein two movable feelers (14-17) are mounted in the housing on either side of the bending line, which feelers project from the respective sloping flank (11-12) of the housing and whose projecting ends are in contact with the workpiece during a bending operation. The two feelers present on one side of the bending line (13) are spaced apart in the direction of the bending line. A processing unit is capable of deriving the bending angle from the difference in displacement between the two feelers of a pair of feelers positioned on one side of the bending line. |
