1. It can be combined arbitrarily according to the whole weight and length of the weldment, so it is very flexible and convenient to use.

2. If it is within the prescribed range, the center distance of the roller can be adjusted automatically. It is suitable for welding parts of different diameters, and the welding parts of the cylinder will be more stable in placement.

3. Silicon can also be used for power supply, which is driven by DC motor. It has the advantages of non-polar debugging, wide range of welding speed and stable welding speed.

4. Because the applicability of the roller frame is very strong, the scope of its use is very wide.

5. The combined rollers will be equipped with rubber sleeve outside the steel wheel, so the whole transmission will be more stable. Because of the greater friction, the service life of the combined rollers will be effectively improved.

6. The requirement of workpiece's wheel pressure is relatively small, which can avoid the cold working and hardening of workpiece's surface.