Welding machine and cylinder ring machining method

The invention discloses a welding machine and a barrel ring processing method, and belongs to the technical field of clothes processing device processing. The welding machine comprises a machine body and a first butt seam positioning assembly; a working table and a positioning block are arranged on the machine body, a welding groove penetrating in the preset direction is formed in the working table, the positioning block and the working table are oppositely arranged in a spaced mode in the preset direction, and a first pressing plate and a second pressing plate are arranged on the surface, facing the positioning block, of the working table and located on the two sides of the welding groove correspondingly. The first pressing plate and the second pressing plate can move towards the positioning block; the first seam aligning and positioning assembly comprises a first seam aligning and positioning piece movably arranged on the workbench along a first set track, and the first seam aligning and positioning piece c