According to the size of the workpiece in diameter, the wheelset of the automatic swing angle can be adjusted, and at the same time, the center can be adjusted automatically, and the welding operator and welding positioner can be matched. It can better weld the inner and outer circumferential seams of the workpiece, as well as the inner and outer longitudinal seams. When driving, the noise will be lower, and the workpiece will be more stable when turning. The cylindrical cylinder can be polished, transferred, welded and glued. The rotating speed of the roller must be uniform and stable, and any creeping phenomenon must be strictly prohibited. It has the functions of over-voltage protection and self-protection, as well as the corresponding functions of storing and prompting faults, as well as the protection of automatic switch and protection settings.

It is necessary to carry out the corresponding device of safe conduction to the roller rack, forbidding the current passing through the bearing and the roller rack in the welding process; the self-adjusting roller rack also has the display technology, because it is set in the welding speed, which not only accurately but also effectively reduces the difficulty of operation; if the non-circular long workpiece is welded, it can be directly clamped in the ring. Of course, the clamp can also be directly placed on the roller rack for welding operation; it can adjust the roller rack with two heights of master and slave properly, and can also weld different segments and cones.