t is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, stack welding, sealing welding, etc., with a high aspect ratio, a small weld width, and a small heat-affected zone. Small deformation, fast welding speed, smooth and beautiful weld seam, no or simple treatment after welding, high quality weld seam, no air holes, precise control, small focus spot, high positioning accuracy, easy to realize automation.