Welding is a fabrication process where two or more parts are fused together by the use of heat, pressure, or both, forming a join as the parts cool. Welding is usually used on metals and thermoplastics. Welding automation integrates robotic with specific welder machine( according to different type of welding) and other advance technologies, like vision system, weld steam tracking system, to ensure and to reach an efficiency and high performance system.