Types of Welding

Bronze Age

Welding can be traced back to the _________, but it was not until the 19th century that welding as we know it today was invented. Some of the first successful commercially manufactured aircraft were constructed from welded steel tube frames.

Welding

_________ is defined as a process that joins metal by melting or hammering the work pieces until they are united together

Gas welding

________is accomplished by heating the ends or edges of metal parts to a molten state with a high-temperature flame.

oxy-acetylene flame

Electric arc welding

__________ is used extensively by the aircraft industry in both the manufacture and repair of aircraft. It can be used satisfactorily to join all weldable metals, provided that the proper processes and materials are used.

Shielded Metal Arc Welding (SMAW) 

Also known as Stick welding, An arc is struck between the rod and the work and produces heat in excess of 10,000 °F, which melts both the material and the rod.

electrode

The __________ is then withdrawn from the metal approximately ¹⁄4-inch to form an air gap between the metal and the electrode. If the correct gap is maintained, the current bridges the gap to form a sustained electric spark called the arc. This action melts the electrode and the coating of flux. 

Gas Metal Arc Welding (GMAW) 

Formerly known as metal inert gas (MIG) welding.an uncoated wire electrode is fed into and through the torch and an inert gas, such as argon, helium, or carbon dioxide, flows out around the wire to protect the puddle from oxygen.

Gas Tungsten Arc Welding (GTAW)

Method of electric arc welding that fills most of the needs in aircraft maintenance and repair when proper procedures and materials are used. Preferred method to use on stainless steel, magnesium, and most forms of thick aluminum. Tungsten Inert Gas (TIG) welding

Electric Resistance Welding

_______ either spot welding or seam welding, is typically used to join thin sheet metal components during the manufacturing process. 

Spot Welding

Two copper electrodes are held in the jaws of the spot welding machine, and the material to be welded is clamped between them.

Seam Welding

Two copper wheels replace the bar-shaped electrodes. The metal to be welded is moved between them, and electric pulses create spots of molten metal that overlap to form the continuous seam.

Plasma Arc Welding (PAW)

This provides an advanced level of control and accuracy using automated equipment to produce high quality welds in miniature and precision applications.