A welding machine is a device used to join materials, typically metals, by applying heat and pressure. It works by melting the edges of the materials to be joined, allowing them to fuse together as they cool. There are various types of welding machines, including MIG (Metal Inert Gas), TIG (Tungsten Inert Gas), and Stick welding, each suited for different applications and materials. Welding machines can be powered by electricity, gas, or other energy sources. They are commonly used in industries such as construction, automotive, and manufacturing. Safety equipment, like welding helmets and gloves, is essential to protect the welder from harmful sparks and intense light during the welding process.