CO2 welding equipment and process

• Difference between shielded mental arc welding and CO2 welding
• The principal of CO2 welding

CO2 welding equipment and accessories

• Curve A
• Touch assembly
• Curve B
• Control system
• Wire reel
• Wire feel drive motor

Setting up of GMA welding machine

• Direct current electrode positive(DCEP)
• Direct current electrode negative (DCEN) or DCSP
• Wire feeder and  drive unit
• GAM/CO2 welding torch-welding gun
• Smoke extracting torch system
• Shutting down the plant

Advantages ,disadvantages of CO2 welding over SMAW process and application of CO2 welding

• Advantages
• Disadvantages
• Application of Co2 welding process

Base metal preparation and types of metal transfer in GMAW/ Co2

• Base metal preparation
• Globular transfer
• Short circuit transfer (DIP transfer)
• Spray transfer
• Electrode
• Types of metal transfer
• Welding current
• Arc travel speed
• Stick out
• Arc voltage
• Welding procedure
• Electrode position
• Welding position
• Safety in GMA welding / Co2 welding

Straight line beading on MS plate in flat position

• Preparing the metal surface
• Welding method
• Welding of different joints in the flat position by GMAW / Co2 welding
• Fillet weld on a lap joint
• Fillet welt on tee joint – flat position
• Groove weld on a butt joint – flat position

Welding Wires used for Co2 welding in application

• Chemical properties
• Chemical composition, Weight percent

Wire feed system – Difficulties

• Drive rolls and wire guide tubes

Shielding gases for GMA welding

• Argon Carbon dioxide
• Argon – oxygen

Laying straight line beads and welding T fillet joint in horizontal position

• Suggested gases and gas mixture for use in GMAW short circuiting transfer

Welding joints in vertical position

• Groove weld but joint – vertical up – uphill motion

Burn – off characteristics of filler wire in Co2 welding

• Principle of self regulating arc length in GMAW/Co2

Flux cored arc welding

• Metal transfer in FCAW
• Classification of flux cored wires

GMA narrow gap welding

Weld defects, causes and remedies in Co2 welding / GMAW

• Troubleshooting Welding condition and defects

Apply for Certification

https://www.vskills.in/certification/Vskills-Certified-MAG-or-CO2-Welding-Operator