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Automatic welding
Uses equipment, which welds without the constant adjusting of controls by the welder or operator. Equipment controls joint alignment by using an automatic sensing device.
Cold weld
Defective weld due to improper contact or inadequate heat during welding.
Continuous weld
Continuously welding one coil to another at the entry end and splitting off coils of a specific weight at delivery end.
Electrode
Filler metal in the form of a wire or rod whether bare or covered, through which current is conducted between the electrode holder and the arc.
Gas flame cutting
A metal cutting process that utilizes rapid oxidation of the metal by a jet of pressurized oxygen. Gas flame cutting is most commonly used in the manufacturing of heavy equipment and used in
construction of structural members for buildings, and also in repair work. It is used to cut ferrous metals by rapid oxidation of a narrow, heated, zone. In industrial applications, oxy-fuel cutting is
the predominant flame process for cutting of mild and low-alloy steels.
Gas metal arc welding (GMAW)
A welding process in which a piece of electrically charged wire being fed through a pistol grip type handle completes an electrical arc with the pieces being welded. The electrical arc provides the
heat source and the advancing wire provides filler material for the weld bead. Simultaneously, inert gas flows through the end of the pistol grip type handle along with the wire. This inert gas
floods a few square centimeters of work area to prevent the problems that can arise from oxidation. This welding process is used where deep penetration is necessary, speed in production is
necessary, larger pieces are being joined, and the cosmetic appearance of the bead is of little concern. Gas metal arc welding is also referred to as wire feed welding and MIG welding.
Gas Tungsten Arc Welding (GTAW)
A welding process in which an electrical arc is struck at the tip of a tungsten stylus by completing an electrical circuit through the piece being welded and the stylus. Simultaneously, inert gas
flows over the stylus and floods a few square centimeters of work area to prevent the problems that can arise from oxidation. While the electrical arc is being maintained as a heat source, filler rod is
added to the weld bead area to join the two pieces of parent metal. This type of welding process is used where a neat clean weld bead is desired, where deep penetration is needed, where oxidation
presents problems, where speed in production is necessary, or where robotics will be used. Gas tungsten arc welding is also referred to as TIG welding (Tungsten Inert Gas) and Helli-arc welding.
Lap weld
Coil ends are “lapped” over one another and welded, doubling the thickness of the steel at the weld and are then marked by a hole punch.
Lap-welded joint
Welded seam in which the two metal pieces to be joined overlap one another.
Metal arc weld
Metal melting and fusing process using a continuous metal consumable electrode with an inert gas around the electrode to shield against oxidation.
MIG or MIG weld
MIG stands for Metal Inert Gas welding and is often referred to as wire-feed welding. MIG welding is a commonly used high deposition rate welding process. During the welding process, wire is
continuously fed from a spool. MIG welding is sometimes referred to as a semi-automatic welding process.
MIG Weld (Metal Inert Gas) or GMAW Gas Male Tool
A mold duplicating the interior dimensions of the part. See Gas Tungsten Arc Welding (GTAW).
Oxy-fuel cutting
A flame application for cutting processes that uses an oxy-fuel (typically oxy-acetylene) flame and straight oxygen as a cutting jet to separate the metal. This process is used on carbon steels and
sometimes on stainless steels. Oxy-fuel cutting and welding products include oxy-acetylene and oxy-fuel welding and cutting apparatus. See Gas Flame Cutting.
Plasma Arc Cutting (PAC)
An arc cutting process, which severs metal by using a constricted arc to melt a small area of the work. This process can cut all metals that conduct electricity.
Resistance Spot Welding (RSW)
Melting and joining action of two adjoining metal surfaces created by the thermal reaction of the metal to the flow of an electrical current forming a weld nugget.
Robotic welding
There are two popular types of industrial welding robots. The two are articulating robots and rectilinear robots. Robotics control the movement of a rotating wrist operating in space which
repeatedly and precisely applies the welding to specific pre-determined points.
Shielded Metal Arc Welding (SMAW)
An electric arc is established between a flux-coated consumable rod electrode and the work piece. A gaseous shield is provided by vaporization of the flux coating. SMAW is frequently referred to as
“stick” or “covered electrode” welding.
Shielding gas
Inert gas used for oxidation protection during welding.
Tack weld
Usually refers to a temporary weld used to hold parts in place while more extensive. Final welds are made. In some sheet metal applications, tack gelds may provide sufficient strength to eliminate
the need for an "all around" fillet weld.
TIG or TIG Welding
TIG is short for Gas Tungsten Arc Welding (GTAW). In the TIG welding process, an arc is formed between a non-consumable tungsten electrode and the metal being welded. Gas is fed through the
torch to shield the electrode and molten weld pool. TIG is most commonly used in high quality, high precision, welding applications.
TIG weld (Tungsten Inert Gas)
Process using a non-consumable tungsten electrode and a shielding gas, with filler material optional.
Weld accessibility
Ease of reaching the weld area with the torch or electrode.
Weld distortion
Depression or bulge on surface, caused by thermal expansion.
Welding
Welding is a process for joining similar metals. Welding joins metals by melting and fusing the base metals being joined and the filler metal applied. Welding employs pinpointed, localized heat
input. Most welding involves ferrous-based metals such as steel and stainless steel. Welding covers a temperature range of 1500º F - 3000º F. Weld joints are usually stronger than, or as strong as,
the base metals being joined. Typically, welding is used for forging, blacksmithing, oil pipelines, and food equipment applications. See electrode, MIG, and TIG.
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