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 Introduction: This automatic welding machine is mainly used for submerged arc welding of assembled H beam, the working principle is as following: 1. One H-beam steel placed on workpiece support frame with 45°, which is suitable for boat welding. 2. Gantry welding machine walks on rails at adjusted welding speed. 3. Use SAW welding to weld two seam. 4. Arc-guide frame automatic seam tracking. 5. Flux automatic feed and recovery system.   Technical Parameter:   
| Model | LHM-4000                 |  
| Rail gauge                 | 4000mm |  
| Web height                 | 200~1500mm                |  
| Flange width                 | 200~800mm                 |  
| Work-piece length                 | 4000~15000mm or as user's request                 |  
| Model of welding machine                 | Two sets of ZX5-1000 automatic submerged arc welding machine |  
| Welding type                 | Boat-type welding                 |  
| Welding speed                 | 0.15~1m/min                 |  
| Returning speed                 | 3m/min                 |  
| Overall power                 | 9.6kW                 |  
| Above are our standard model, it can be designed and manufactured according to customer's request.     |  |