Table of Content
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