The invention relates to a
welding machine, particularly to an automatic straight
pipe flange welding machine which is suitable for both plug-in type
flange assembly type
welding and butt-joint type
flange assembly welding. The automatic straight
pipe flange welding
machine comprises a base, wherein base guide rails are arranged on the base, a trolley base is arranged on the base guide rails, a
control system is arranged on one side of the trolley base, a
welding torch machine is arranged on the trolley base and comprises a longitudinal adjusting mechanism, a lateral adjusting mechanism, an inner
welding torch mechanism, an outer
welding torch mechanism and a roller adjusting mechanism, wherein the inner welding
torch mechanism consists of an inner welding
torch upright post device and aninner welding
torch device, and the outer welding torch mechanism includes an outer welding torch upright post device and an outer welding torch device. The automatic straight
pipe flange welding machine has high automatic degree, improves welding efficiency, reduces
grinding time and waste of welding materials, guarantees welding quality, and attractive formation of weld seams, is convenient to operate, saves labor, and lightens labor intensity.