The description of Gantry Auto-welding Machine:
Gantry Auto-welding Machine is an important steel structure machine. Gantry Auto-welding Machine for H-type steel accepts the AC frequency converter to control speed with the merits of stable and reliable running and quick returning. It uses the auto-arc tracing & centering device to ensure the welding gun is auto and correct centering to the target workpiece. The column-beam welding machine can increase the height of web plate according to the need of users. 
Main technical specification of Gantry Auto-welding Machine:
| Model | LMH-4000 |
| Height of web plate | 200-1500mm |
| Width of web plate | 200-800mm |
| Thickness of flange plate | 6-40mm |
| Thickness of web plate | 6-32mm |
| Model of welder | Two sets of model MZ-1-1000 auto submerged-arc welders |
| Form of welding | boat-type welding |
| Welding speed | 0.15-1.0m/min |
| Returning speed | 3m/min |
| Gauge | 4000mm |
| Gas pressure | 0.2-0.8Mpa |
| Overall Power | 10kw (excluding the welder) |