Using back welding to the welding seam bottom of the box beam is to prevent large current burning through bottom of welding seam; generally used the CO2 gas shielded welding.
And being similar with other structure, the cantilever back welding is composed of moving cart, column, cantilever beam, welding arm, welding seam tracking device, wire feeder, electric control system and the welding power, etc.
1. The dimension of the column is large, so it makes the overall rigidity structure bigger.
2. The main part of upper beam is square tubes and has light weight rigid good characteristic. The upper beams have guide and rack, so it makes dragging plate and welding beam moving levelly on the beam.
3. Two sets of motors drive four wheel axles through the gear. It composes 4 wheel driving systems, in order to make it stable and reliable operation.
4. The cantilever box beam welding arm has two groups of two welding seam. It can welds two welding lines simultaneously.
5. Usually we use Tangshan Panasonic CO2 welding machine( YD-600KH), also  you can select other brand. Users can choose single arc single wire backing welding or double arc double wire welding according to their requirement.

Wuxi Zhouxiang Complete Set of Welding Equipment Co.,Ltd,founded in 1991,located in Wuxi city, about 100km from Shanghai.We have fixed assets of 150 million yuan,cover an area of 160,000 m2, staff 500 people,including more than 100 engineering and technical personnel.Our company was certified to ISO9001 Quality System Certification firstly in the industry and many products were certified to China Compulsory Certification(CCC).Our products sell well at home and abroad,including  Europe,America,Southeast Asia,Middle East and other countries.
Zhouxiang products mainly include CNC flame/plasma cutting machine,H beam light duty production line,H beam heavy duty production line,Horizontal H beam production line,H beam assembly welding straightening integral machine,Corrugated web H beam production line,Box beam production line, Welding manipulator, Rotator, Positioner,Edge milling machine,End face milling machine,Shot blasting machine series,kinds of plate rolling machine,Profile bending machine and welders,fiber laser cutting machine,CO2 laser cutting machine,laser tube cutting machine,Fiber laser cutting robot and Fiber laser welding robot etc.
We have high sincerity to do business with customers all over the world and establish good friendships.