A welding machine is a critical tool used in metalworking, fabrication, and repair tasks. It joins metal parts by melting them together through heat. The machine generates high levels of heat, which causes the metal to melt, allowing it to fuse with the workpiece. Common types of welding machines include MIG welders, TIG welders, and stick welders, each designed for different materials and welding techniques.

Welding machines are available in both portable and industrial models, with features designed for different work environments. MIG (Metal Inert Gas) welders are popular for their ease of use and suitability for thin to medium thickness metals, while TIG (Tungsten Inert Gas) welding provides more precision for delicate tasks, such as working with aluminum. Stick welders are often used for outdoor or heavy-duty applications due to their durability and the ability to weld in various positions.

Welding machines are essential for a variety of industries, including construction, automotive repair, shipbuilding, and pipeline construction. They can also be used for artistic applications, such as metal sculptures. Safety features, like overload protection, grounding systems, and proper ventilation, are critical in welding machines to protect users from risks like electric shocks, burns, and fumes.