MIG Welding. Gas metal arc welding (GMAW), also known as MIG (metal inert gas) welding or MAG (metal active gas) welding, is a process in which an electric arc forms between an electrode and a metal workpiece, heating the metals and causing them to melt, and be joined.

1. presentationonmigwelding
PRESENTED BY-
GAURAV KUMAR
DEPARTMENT– MECHANICAL
ENGINEERING
ROLL NO. – 34200717053
COLLEGE– FUTURE INSTITUTE OF
TECHNOLOGY
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2. CONTENTS
 INTRODUCTION
 WORKING
 APPLICATIONS
 ADVANTAGES
 DISADVANTAGES
 REFERENCES
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3. INTRODUCTION
 MIG welding is also known as gas metal arc
welding (or GMAW).
 MIG welding is an arc welding process.
 The process can be semi-automatic or
automatic.
 In MIG welding a constant voltage, direct
current power source is most commonly used
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4. WORKING
 First, DC current supply with high current at low voltage.
This current passes though welding electrode.
 A consumable wire is used as electrode.The electrode is
connected to the negative terminal and work piece from
positive terminal.
 A arc will generate between electrode and work piece .This
arc used to produce heat which melts the electrode and the
base metal.
 This arc is well shielded by shielding gases.These gases
protect the weld form other reactive gases
 This electrode travels continuously on welding area for
making proper weld joint.The angle of the direction of
travel should be kept between 10-15 degree.
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6. APPLICATIONS
 MIG is best for fabrication of sheet metal.
 Generally all available metals can be weld
through this process.
 It can be used for deep groove welding.
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8. ADVANTAGES
 It provide higher deposition rate.
 It produce clean weld with better quality.
 There is no slag formation.
 Minimize weld defects
 It can be used to make deep groove weld.
 It can be easily automated.
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9. DISADVANTAGES
 Higher initial or setup cost.
 It cannot be used for outdoor work because
wind can cause damage of gas shield.
 It required high skilled labor.
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10. REFERENCES
 https://www.mech4study.com/2017/04/mig-
welding-principle-working-equipment-
applications-advantages-and-
disadvantages.html
 https://www.slideshare.net/parashararchit/m
etal-iner-gas-welding
 https://en.wikipedia.org/wiki/Gas_metal_arc_
welding
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