| 摘要 |
The sheet metal is bent transversely to its grooves without any wrinkle formation in deep profiles. The sheet is positioned between two pressing assemblies displaceable with respect to each other and each groove on each side of the sheet is filled over the whole cross-section thereof with an incompressible bending core (18, 19) formed by at least two longitudinal, superposed strips (24) longitudinally slidable with respect to each other. The sheet is bent around a bending line into a desired angle or arch between forming surfaces (11, 16) which are formed by the assemblies and which are smooth in the direction of the bending line. The press comprises separate bending cores (18, 19), similar to a leaf spring stack, formed by the superposed strips (24). The cross-section of each strip stack corresponds to that of the profile groove of the sheet up to the height of the adjacent ridges. The lower assembly has two tiltable devices (14-17). <IMAGE> |
