Hollow metal profile bending - has mandrel to fill the hollow interior on entry to the bending rollers

摘要

To bend hollow metal profiles, in a rolling bending action, the hollow profile of the workpiece is filled by a basic mandrel. The workpiece is advanced by a pushing force into the bending station, where rollers impose the required bend. - The push forces are applied to the workpiece along its longitudinal axis, together with a rotary movement. The mandrel can slide and be blocked in the bending zone. The mandrel is held in the hollow profile of the workpiece by a holding rod. A unit to push the workpiece is at the entry side of the workpiece into the bending station using a profiled slide which travels along a guide path, under power, which can be locked to the workpiece and released from it. One or more roller guide stations are positioned along the slide path, to be locked into the required position, to give a keyed lock round the workpiece and prevent distortion while advancing pressure is applied to it.