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Working of mig welders

Working of mig welders


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Working of mig welders

By: Jacob Watson
Posted: Apr 29, 2011


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Have you ever though that how mig welders work? These welders are one of the most commonly used types of welders nowadays. The general process of welding that a mig welder employs is called gas metal arc welding (GMAW). These welders function by feeding a wire which is the electrode through a welding gun. At the same time there is a regular flow of inert shielding gas. Its main purpose is to protect the weld during the cooling process.
The most general gases used are carbon dioxide for normal welding process. The major reason behind its usage is that it costs cheap and helps in creating good weld. Argon and carbon dioxide are also used in a mixture to have a welding arc with fewer spatters, delivering cleaner welds. Pure argon gas is normally used to get the best welds during aluminum welding. There are large numbers of advantages associated with GMAW process as compared to other general welding processes. The welding gun has a trigger to control the electrode which allows you to position it without accidentally hitting an arc. After getting it into the right place, all you need to do is flip down your helmet and pull the trigger.
The inert shielding gases are responsible for making the welds smooth and clean. There exists no slag to chip off. Mig welders are also found to be extremely perfect to for weld sheet metal and thinner metals. The reason behind this is that they can weld at lower amperage than most other types of welders. Mig welders always use DC current to strike the welding arc. This is because using alternating current doesn’t give you a steady arc.
Another advantage with a mig welder is that you can adjust the voltage, amperage and the speed at which the wire is fed through the welder. The tensioner on the welding wire is variable as well. They will also have a valve to control the flow of gas. Mig welder also allows you to be used without using the shielding gas. This is known as flux cored arc welding (FCAW). Most welders have the option of switching the polarity of the welding arc for use with flux cored wire. During the welding process, the welding wire has a hollow core that is filled with flux.
Local Tool Sales is a low cost provider of quality MIG gasless welders. Browse through our wide range of cheap mig welding machines for sale:

Jacob Watson – About the Author:

Jacob Watson has 10 years of experience in writing Articles, Blogs and creative writing for numerous online article-submission directories. Besides this, he is also into wildlife-photography and music.

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More Mig Welder Articles

Pro-Series MMIG125 125 Amp Fluxcore MIG Welder Kit

  • Includes ground cable with clamp, welding gun, spool of flux cored wire, face shield and brush hammer
  • Thermal overaload protection, 80-125 Amps, Duty cycle 20% at 80 Amps
  • Wire size: .030-.035, Heating settings: two
  • Max metal thickness: 18 guage / 3/16 inch
  • For small to medium sized welding jobs around the home, garage or farm, welds all types of carbon steel.

Product Description
mfr: New Buffalo Corp.
• Welds All Types Of Carbon Steel
• For Small To Medium Sized Welding Jobs Around The Home, Garage, Or Farm
• Includes Ground Cable With Clamp, Welding Gun, Spool Of Flux Cored Wire, Face Shield & Brush Hammer

Features
• Thermal Overload Protection
• Amps: 80 (Max 125)
• Duty Cycle 20%@80 AMPS
• Wire Size: .030 – .035
• Heat Settings: Two
• MAX Metal Thickness: 18 Gauge / 3/16″

Pro-Series MMIG125 125 Amp Fluxcore MIG Welder Kit