Automatic welding carriages are primarily classified by weld joint type into two categories: dedicated fillet welding tractor and rail-mounted fillet welding tractor.

The dedicated fillet welding tractor features an automatic induction welding torch clamping device that controls carriage movement via arc initiation and termination commands. Its gap-free drive ensures precise torch oscillation. An integrated magnetic clutching handle facilitates installation and debugging, while high-performance magnets enhance vertical welding reliability.

Rail-guided fillet welders utilize flexible rails for guidance, enabling fillet and butt welding on curved surfaces with high practical value. The flexibility of the rails allows easy installation according to steel plate markings. Equipped with switch magnets, the rails facilitate quick disassembly and installation. The rail-guided vertical welding machine employs high-precision reduction gears for smooth travel, significantly enhancing welding quality and extending equipment lifespan.