welding production line for box girder mainly use to weld under frame side beam of electric locomotive type SS3B，SS4，SS6B，SS7E，SS7，SS7C，SS7D and etc.

Mainly advantages of this equipment:

1.application scope is wide,only one welding machine can satisfy the need of various type electric locomotive’s beam,changing the couple tyre is not necessary,only need to adjust inverse distortion.

2.welding two sides symmetrily at the same time ,preventing welding distortion,good quality seam,beautiful formation.

3. Pneumatic inverse distortion, automaticly feed in material and out,improve the production efficiency and lower the labor intensity.

4.welding automaticlly,workman’s technician class doesn’t have to be high,only need short time trainning.

5.dust and smoke discharger device,improve the work envirement.