ATE Welding Engineering Robotics
 
 
 
 
Technical Lab

MIG Welding Machines

Gas Metal Arc Welding Machines (GMAW) is frequently referred to as MIG welding.  MIG welding Machine is a commonly used high deposition rate welding process.  Wire is continuously fed from a spool.  MIG welding is therefore referred to as a semiautomatic welding process. 
MIG Welding Machines

MIG Welding Benefits

All position capability
Higher deposition rates than SMAW
Less operator skill required
Long welds can be made without starts and stops
Minimal post weld cleaning is required
MIG Welding Shielding Gas
The shielding gas, forms the arc plasma, stabilizes the arc on the metal being welded, shields the arc and molten weld pool, and allows smooth transfer of metal from the weld wire to the molten weld pool.  There are three primary metal transfer modes:
Spray transfer 
Globular transfer 
Short circuiting transfer
MIG Welding Machine

The primary shielding gasses used are:

Argo 
Argon - 1 to 5% Oxygen
Argon - 3 to 25% CO2
Argon/Helium
CO2 is also used in its pure form in some MIG welding processes.  However, in some applications the presence of CO2 in the shielding gas may adversely affect the mechanical properties of the weld. 

Common MIG Welding Concerns

We can help optimize your MIG welding process variables. Evaluate your current welding parameters and techniques.  Help eliminate common welding problems and discontinuities such as those listed below:

Weld Discontinuities
Undercutting 
Excessive melt-through
Incomplete fusion
Incomplete joint penetration
Porosity
Weld metal cracks
Heat affected zone cracks
MIG Welding Machine

MIG Welding Problems

Heavily oxidized weld deposit 
Irregular wire feed
Burnback
Porosity
Unstable arc
Difficult arc starting
MIG Welding Machine

If your company is experiencing these or other welding problems you can retain ATE to improve your weld processing.  Hire ATE to act as your welding specialist.