A method for folding a steel sheet over another to provide a hollow assembly, as a vehicle door, has an eccentrically driven form tool

摘要

A pair of sheet steel pressings (26,27) are clamped (28) together while an eccentric shaft (20) first raises a form tool (4) to raise a flange of one sheet (26) against a plunger (29) which is then withdrawn as the form tool moves over and descends to form the joint. A cam (19,20) is connected to the form tool.