The presentation discusses Metal Inert Gas (MIG) welding, an arc welding process that can be semi-automatic or automatic and typically uses a constant voltage, direct current power source. It covers the working principles, various applications, advantages such as higher deposition rates and clean welds, and disadvantages including high setup costs and the need for skilled labor. References include links to articles and studies related to MIG welding.

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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THANK YOU