| 摘要 |
An apparatus is provided which forms flanges on sheet metal for ventilation duct walling. The apparatus comprises a die support which contains a pressure die, a beam punch carrier mounted in low-friction manner on the die support, and a forming roller pivotally housed in a recess of the die support. Hydraulic drives are supported, each between the die support on the one hand and the beam punch carrier or the forming roller on the other hand, and these produce the movements necessary for edge folding and roll forming. The forces which arise are taken up directly at their point of origin by the mutually moving parts themselves. |
