Basic Welder Information Need to know As a Beginner
A welder joins or fuses metal by melting the parts and then using a filler to form a joint. Welding can be difficult for certain metals because they are prone to cracking and distortion when overheated. Welds are done even underwater and in outer space. Underwater welding is mostly used to repair pipelines and ships.
Welder equipment comes in many sizes, prices, and types to fit the needs of most everyone that enjoys working with welders, from home shops to industry. There are two basic types of welders, alternating welding current (AC) and direct welding current (DC).
There are different welding processes, arc welder, gas welder, resistance welder, and energy beam welders. Arc welds are done with the use of electrical current. It requires inexpensive welders equipment. A gas welder is used for repairing pipes and tubes. It is also used in the jewelry industry, and with plastic and other materials that cannot stand higher temperatures. Resistance welding is the most environmental friendly among all the methods but requires costly equipment which cannot be used in all situations.
A welder can be used for housing, transportation, and manufacturing to repairs. A weld can be done from gas flame, electric arc, to a laser.
The MIG welder is the most popular. Operator appeal and the weld appearance are excellent with MIG welders and the MIG welding process. Good MIG weld techniques will yield excellent results. The properly made finished weld has no slag and virtually no spatter.
MIG welding process can be used on a wide variety of material types such as mild steel, low alloy steel, aluminum, stainless steel (careful not to overheat), and on a wide range of material thicknesses.
A variety of metal transfer modes exists in the MIG welder, including axial spray, globular, short-circuiting, pulsed spray and surface tension transfer. Some of these modes may require specialized MIG welders and/or specific shielding gas mixture.
TIG welders are designed for the Gas Tungsten Arc Welding process (GTAW), which is commonly referred to as the Tungsten Inert Gas process (TIG welding). The TIG process derives the heat for welding from an electric arc established between a non-consumable tungsten electrode and the part to be welded. Filler metal, if used, is manually fed into the weld puddle when TIG welding.
The TIG weld process requires an air or water-cooled torch to hold the tungsten electrode and is connected to the TIG welder. The TIG welding process also requires an external shielding gas, typically argon, helium, or a mixture of the two to protect the molten metal and electrode from atmospheric contamination.
High-quality welds can be produced with TIG welders. The TIG welding process also has all position welding capability and is excellent on very thin materials. Additionally, a TIG welder makes welds that have an outstanding appearance, and clean-up is fast and easy since there is no slag and essentially no spatter.
Arc welding is a process of joining metals by means of the heat created in an electric arc. The pieces of metal to be welded (base metal) are placed in position and the intense heat of an electric arc is applied to the joint, melting the metal. At the same time, additional filler metal may be added to the joint and mixed with the melted base metal. Upon cooling, the melted metal becomes one solid piece. This mixing and solidifying of metal are called fusion.
Arc welding is vital to many industries. The arc welder is involved in construction, transportation, fabrication, petrochemical and other industries. Arc welders are involved in consumer appliances to fabricating heavy machinery and structural steel. Arc welding is the main method for building and other industrial constructions, including oil and gas pipeline, and oil refinery construction.
Arc welding is strong enough to hold our bridges up. It must withstand the weight and vibrations of cars and trucks passing over ARC Welded bridges!