SWIVEL BENDING MACHINE FOR CREATING AN OPEN HEM ON A SHEET AND SHEET BENDING METHOD

Abstract: a swivel bending machine and method produces a hollow fold on a sheet with a lower beam for supporting the sheet, an upper beam with a wedge-shaped bending edge for clamping the sheet between the upper beam and the lower beam, a rotatable or pivotable bending beam for bending the sheet section of the sheet protruding between the upper beam and the lower beam in a first bending step along the wedge-shaped bending edge into an acute angle, and a movement device for moving the wedge-shaped bending edge out of the sheet section pre-bent into an acute angle. the swivel bending machine further bends the sheet section into a hollow fold in a second bending step with further actuation of the bending beam between the bending beam and the lower beam, while the sheet is fixed against the lower beam by the wedge-shaped bending edge.

Inventor(s): Klemens RIEGER

CPC Classification: B21D39/02 (WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire ))

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