GMAW (mig) Flashcards
Gas metal arc welding is also known as what?
Mig
(Gmaw)
When doing semiautomatic welding what two things does the equipment control?
Feed and arc length
What does GMAW-S stand for?
Gas metal arc welding short circuiting
A buzzing or sharp crackling sound best describes what type of metal transfer?
GMAW-S
Gas Metal Arc Welding short circuiting
What must eyes, face, and exposed skin be protected from when GMAW Welds cool down?
Isles of silicone
What is the MAX thickness that is typically welded with GMAW-S
1/4-3/8 inch
GMAW spray welding is generally NOT done on materials thinner than what?
3/8
What is the abbreviation for pulse variation of gas welding?
GMAW-P
What type of power source must be used for pulse welding?
Inverter
A hissing or whispering sound best describes what type of metal transfer?
Spray
List the two AWS abbreviations for the arc welding processes that melt a tubular electrode with alloys, deodorizers, and slag formers in their cores?
FCSW-G
FCAW-S
How many types of feed rollers are there
3
What are the 3 types of feed rollers?
Flat
Single groove
Double groove
What are the 4 types of drive roll groove shapes?
V groove
U groove
Knurled V groove
Cogged U groove
What is a V groove drive roller used for in terms of welding?
Hard wire
Ex steel
What are U groove drive rollers used for in terms of welding?
Soft wire
Ex aluminum or soft shelled cores wires
What are knurled V groove drive wheels used for in terms of welding?
Hard wheeled wires or on spool guns
What are cogged U groove drive wheels used for in terms of welding?
Extremely soft wire or soft shelled cores wires
Ex hard facing wires
What keeps adequate pressure against the feed rolls for gripping the weld wire?
Spring type pressure adjustment
What are most guns rated under 400amps designed for use with?
CO2 gas and are air cooled
What time frame SHOULD wire be used in (mig) ?
2-3 months
What two things does the equipment control in GMAW?
Electrode feeding
Arc length
What type of power source MUST be used for pulse welding?
Inverter
What type of power source can be used for all GMAW processes?
Constant voltage
Due to GMAW using a continuous wire the duty cycle for industrial power sources should be what?
100% duty cycle
What are the two common types of wire feeders in GMAW?
Constant speed feeders
Voltage sensing feeders
What type of drive roll would be used in GMAW for feeding aluminum wire?
āUā
What is the cubic feet per hour for spray or pulse spray? (GMAW)
30-50 cubic feet per hour
Which gas produces the deepest penetration in GMAW?
C02
What is the strength of ER70S-6 wire?
70,000 lbs of tensile strength
In GMAW and FCAW amperage is set by which control?
Wire feed speed
In GMAW how does the length of the arc affect the voltage?
The higher the longer the arc the higher the voltage
When troubleshooting GMAW what 3 areas should you break it down into?
Process variables
Consumables
Equipment
