Welding Flashcards
when setting up the oxy-acy cutter, where do you stand when turning on the valves
off to the side, do not face it
what can turning on the oxygen suddenly do
make the regulator explode
when turning on the acytelene tank how far should you turn the valve
1/2 to 3/4
how do you purge the lines
turn on each valve on the torch one at a time for a few sec
when lighting the torch, how much should you turn the acytelene valve
about 1/8 to 1/4 on the valve, not opening enough will cause black soot floaters
what are the inner cones on the torch tip known as
the neutral flame
what is the formula for a begginer to achieve a good solid weld
joint prepparation and proper machine set up
what is SMAW
shielded metal arc welding/ stick
what is MIG
metal inert gas welding
what is FCAW
flux core arc welding
what is TIG
tungsten arc welding
what do arc welding machines consist of
grounding clamp
electrode clamp
welding rods/electrodes
which welding rods have deep penetration and work on dirty metal
6010 and 6011
which welding rods have medium penetration and works best on clean metal
6013 and 7018
which welding rod has medium penetration and needs a clean joint
7024
what do the first two # on a welding rod mean
the tensile strength per square inch of weld
what is typical steel rated
A36
how much tensile strength does A36 have
36,000 pounds
what do the last two # on the welding rod mean
the flux/shielding, the higher the # the more shielding
what are the steps to setting up a stick welding machine
selecting your rod
set the polarity according to manufactures recommendation
set the amperage to the recommendation
what polarity do 6011 rods work with
both AC and DC
where is MIG welding most commonly used
fabrication shops where production is high
what protects the weld from air on MIG welders
gas, that comes through the tip
what metal can be MIG welded
almost any metal
what are the three most common metals welded with MIG
carbon
stainless
aluminum with a special feeder because it is very soft
what was MIG called when it was first developed
GMA gas metal arc
what is MIG also known as
GMAW gas metal arc welding
what three things does MIG welding require
electricty to produce heat
an electrode to fill the joint
shield gas to protect from air
what electrical current does MIG use
DC
on the MIG the handle is the _____ side
positive
what does the code mean on the MIG welding wire
ER: an electrode or filler rod that is used in either a wire feed or TIG welding
70: a min of 70,000 tensile strength
S: solid wire
6: the amount of dioxidizing and cleansing agent on the electrode
what is the most common wire used for welding carbon steel
ER 70S-6
what are the most common size of welding wire
.023
.030
.035
.045
what are the three typical shielding gases for MIG
argon
carbon dioxide
helium
what are some cons of MIG
wind is a major factor outdoors
always need a bottle of gas
needs a clean joint
what are the most common welding techniques
circles
whipping
weaving
what are the welding positions
flat/1G drag rod between 10 and 30%
horizontal/2G point rod upwards at a 45% angle
vertical/3G point rod at 45%
overhead/4G same as flat
