Hemming device and method with workpiece protection

The machine has suction pads holding body panels (20) and has a first set of rollers (14a) and a second set of rollers (15a). The rollers shape the edge (22) of an outer body panel (21) and fold it over the edge of an inner panel (24). The second rollers press on an arcuate protection strip (1) which in turn presses on the body panel.