| 摘要 |
Assigned to an upper roll (3) are two side rolls (4) and one or two abutments (6) for guiding and supporting the shorter circular-arc edge of the sheet-metal blank (5). The abutments (6) are designed in such a way that they direct the supporting force or a component of the latter into an adjustable counter-pressure device (8) safeguarded against overload. The abutment (6) can be arranged between or to the outside of the side rolls. In order to ensure that the sheet-bending process is carried out in a particular, desired working region of the rolls, the abutment (6) can be adjusted parallel to the rolls on cross-members (9) or rocker levers, as a guide for the sheet-metal blank. It is thereby possible to ensure that the sheet-bending operation takes place in the working region of the rolls in which both bending-roll adjusting drives are subjected uniformly to forces. <IMAGE> |
