Deformation method for flat sheet metal, involves deforming flat sheet by movement of upper and lower curved supports toward each other, and while flat sheet metal is supported by mandrel

摘要

The deformation method involves arranging a flat sheet metal between an upper curved support (32) and a lower curved support (31). The flat sheet metal is deformed, by the movement of the supports toward each other, and while the flat sheet metal is supported by a mandrel (33). An independent claim is also included for an apparatus for deforming a flat sheet metal to form e.g. pipe.