Setup for Projection Welding (With Diagram) ADVERTISEMENTS: After reading this article you will learn about the setup for projection welding with the help of suitable diagrams. Projection welding is another variation of spot welding in which a number of spot welds are made at one time. To achieve that, small projections are made on one sheet by press work, embossing or  Setup for Laser Welding (With Diagram) | Metallurgy After reading this article you will learn about the setup for laser welding with the help of diagrams. The word LASER stands for ‘Light Amplification by the Stimulated Emission of Radiation’. In laser welding a concentrated coherent light beam impinges at the desired spot to melt and weld the metal.