This equipment is a special welding robot for steel structures tailor-made for automated production in steel structure factories. 1. The equipment is mainly composed of: guide rail parts, gantry parts, robot adjustment parts, electric control box parts, welding power supply parts, etc. 2. The gantry components mainly consist of a driving end frame, a cross beam, an adjusting frame, etc. The driving end beam, cross beam and adjusting frame all adopt box beam welding structure, and then undergo stress relief treatment after welding. The structure is compact and the appearance is beautiful. 3. The active driving end beam of the whole machine uses a Japanese Panasonic AC servo driver and motor to drive a Japanese SHIMPO reducer, and then through a rack and pinion transmission, a horizontal guide wheel is installed on the side of the driving end beam. The guide wheel can be pressed against the guide rail by adjusting its eccentric shaft, thereby ensuring the stability and accuracy of the entire machine operation. 4. The moving guide rails of the cart are all made of 38KG/M. The outer sides of the guide rails are equipped with precision-machined racks. The rack is made of 45 steel with a module of 2.0. Adopt bilateral drive method. The guide rails are fixed through pressure plate backing plates. This installation method can ensure important technical parameters such as longitudinal straightness and parallelism of the two guide rails.