- [Instructor] There are three types
of welding typically used in a sheet metal company,
MIG, TIG and spot welding.
MIG welding allows for quick fabrication
and thicker parts.
The MIG welder's filler material is a wire
that's fed through the handle and makes quick work
of fabricating the parts.
There's also an assist gas that flows
through the handle and keeps oxygen away
from the weld zone so that you have a nice, clean weld
with less splatter.
Spot welding is great for joining flat surfaces
and is quick and easy.
The welder passes high amounts of energy
across the electrodes and the materials melt together.
There is no filler material on a spot welder.
TIG welding is slower, however offers ultimate control
and is perfect for intricate parts.
The filler material is hand-fed into the weld,
so lots of skill is required to make good welds.
Taking a look at some welds, you can see from the video
that the weld around the periphery of this is a TIG weld.
It's a very small weld and is very intricate.
The weld on top is a bit bigger and is a MIG weld.
It's much faster,
however it does produce a little bit rougher weld.