Welding oscillators control the torch with the back and forth movement. It can reduce the number and layers of the weld by the controlling of oscillating speed, width and pause time. Then reduce welding defects for perfect welding seam. The welding oscillator is mainly used for torch welding of MIG/MAG,TIG and open arc welding. The wobbler has an input and output interface, which can be conveniently combined with welding positioner, welding roller frame and welding cross arm to achieve automatic or semi-automatic welding. It is used for weldingfillet welds, pressure vessels, flanges, steel structures, shipbuilding , pipelines, etc., can replace a large number of skilled welders, to obtain high-quality, efficient welding process.