| 摘要 |
During the bending stage, a pressure is applied to the tube behind the heated zone. The bent section coming from the heating zone is forcibly guided for nominal outer diameter, on at least two points of its periphery, in a plane having the maximum expected ovality. When extended to the back, the plane cuts across the center of the bending arm (8). The bending appliance (5) has a water-cooled inductor (6), a bending arm, and a frame (11) with at least continuously adjustable pressure rollers, moveable in peripheral direction. The rollers are positioned opposite to each other and are fixed at a set relative distance during bending. |
