2018-09-252018-09-252018http://hdl.handle.net/20.500.12091/300Welding is a process that joins materials together. Welding usually involves joining metals or thermoplastics. The material is joined with a filler and melted together with a welding tool. When heated, the filler forms a pool of molten material. When the molten material cools, the joint is strengthened. If done correctly, a weld is as strong as the parent material. Many different tools and energy sources can be used for welding, including an electric arc, a gas flame, and a laser. (See the different types of welds below). Welding can be dangerous. Precautions must be taken to avoid injury. This skill introduces the basics of welding and how to work with a professional welder.en-USMechanicalArticle