General principle of welding

1.- Base metal.

2.- Welding cord.

3.- Energy source.

4. -Metal of contribution.

Welding is a fixing process in which the union of two or more pieces of a material (usually metals or thermoplastics), usually achieved through coalescence (fusion), in which the pieces are welded by melting, is done. add a filler material (metal or plastic), which, when melted, forms a puddle of molten material between the pieces to be welded (the weld pool) and, when cooled, becomes a fixed joint that is called cord. Types of Welding   MIG welding MIG welding is named for using metallic inert gas. This type of welding is the most used and perhaps the easiest to learn, among all types of welding. The MIG process, also known as gas metal arc welding (GMAW), is ideal for joining mild steel, stainless steels and aluminum.

TIG welding This is the right kind of welding to use when a high-quality finishing job is required that does not require much subsequent cleaning work by sandblasting or grinding. Also known as GTAW for its acronym in English, is the welding of inert tungsten gas and It is comparable with oxyacetylene gas welding. This type of welding requires a little more experience on the part of the operator to obtain adequate results. 

Arc welding Arc welding is the most basic and easy type of welding to master. This type of welding is usually used for metals with thicknesses greater than 4mm. This type of welding can be used for manufacturing, construction and some repairs. SMAW welding is useful in cases of metals 4 millimeters thick or more. For thinner metals, MIG welding is generally used. Welding and cutting by oxyacetylene gas This type of welding is more usual for gas metal maintenance and cutting, for joining soft metals such as copper and bronze and for welding delicate parts such as aluminum cooling pipes. This welding is not widely used for welding mild steel. in general. It consists of mixing oxygen and acetylene gas to create a flame capable of melting metals.

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