| 摘要 |
The invention relates to an apparatus for bending a margin flange (5) projecting at an angle to a surface on a workpiece (2) against the workpiece. The apparatus includes a bending tool (6) which is mounted on a tool holder (14) carried by a parallelogram mechanism (7-12) for movement in relation to a stand (1) on which the workpiece is placed. A drive arrangement (17) is drivingly connected to the tool holder (14). According to the invention, the drive arrangement (17) is connected to the tool holder (14) by a toggle linkage (25-27). The tool holder (14) includes a main part (13), which is connected to the parallelogram mechanism (7-12), and a part (15) which is movable in relation to the main part and which carries the tool (6) and by means of which a resilient element (32) is urged towards a starting position. The toggle linkage (25-27) is arranged to act on the movable part (15) of the tool holder (14) in a direction away from the starting position, when the main part (13) of the tool holder (14) is located in the proximity of an end position and the tool (6) is in engagement with the margin flange (5) on the workpiece (2). |
