Welding is a method of manufacturing (production) that allows the materials to be joined together. The overall operation that is generally used on metal or thermoplastic materials has techniques and types of its own.
The technique which is often adopted starts with melting the work piece sections to be welded. The section that has been melted is filled with a filler, then its joint is cooled and stiffening is provided. In certain cases, the process of joining by heat is made under a particular pressure. The aforesaid method is different from soldering and hard soldering because as part of soldering and hard soldering methods, the joining process is performed at low melting points and the work pieces are formed without melting.