This video is definitely not about welding methods, tips or tricks or any gyaan of that sort!
The welding I use is called Arc welding. I am simply going to share my experience as beginner, with you
There are two types of welding setups you will find prominently in a industrial yard( India).
One is Arc welding and the other is Gas welding
Both have their separate uses merit and demerits
This video will focus on Arc welding, but in general, Gas welding can be used in jobs that are small and require precision
Arc welding is for heavy duty stuff, like gates, grill, welding tools, … basically all big stuff
Another misconception most people have is, Arc welding is dangerous.
But, what is not dangerous?
if you understand the logic and science behind this process
it will diminish all that misconception and phobia related to welding
this will help you handle the welding projects with a lot more confidence
I am going to give an analogy to help you understand this concept.
when two electrical wires make contact , there is spark.
we call this short circuit
which blows the fuse in the house
but if the shorting wires are thinner than the fuse wire, the wire melts
if the shorting wires are thicker than the fuse wire, its the fuse wire that melts
what if the fuse doesn't melt at all, then the shorting wires begin to become hot, till they melt the plastic coating on the wire
this is where electrical fire accidents happen and fuse is designed specifically to avoid such things
What if there is machine that can melt metals using this electrical energy and not cause any damage?
here comes a Welding machine
There are two terminal coming out of a welding machine. one terminal goes to the work piece
the other is connected to the handle which has the welding stick
When we touch this stick which is connected to the other terminal to the body of the work piece,
it sparks...or arcs and then the rod begins to melt away
it also melts the work piece but not as much and I will tell how not to damage the work piece as we move along
Safety precautious are a must in any form of welding works or while handling electrical appliances
welding shields /helmets are a mandatory .
the welding process emits a lot of ultra violet light and harmful gases
The light should never been with bare eyes and the gases should not be inhaled
Always wear welding gloves, because the handles get hot sometimes and if you let it slip accidentally,
it will make sparks where it touches, and can cause electrical hazards
The body should be insulated from ground contact and always wear rubber boots
As long as the flow of electricity is through the work piece , we are safe. The moment it begins to pass through us, we are fried
One terminal is connected to the work piece and the other is in the stick
I am not welding now. we need to understand a few tings before we do that
When we touch the the stick to the work piece it make an arc
when the arc is sustained , it means that electricity is following through the circuit
When that happens, the electrode begins to melt. It also melts the work piece, but since the stick is moved constantly
and has lesser melting point, the damage there is no damage to the work piece.
but on a thin material if you hold the electrode , it may deform , blow holes or melt the work piece
The speed at which we drag the stick will depend largely on the kind of welding stick,
the material thickness we are working with, the amperage setting and the kind of welding required
for thin material like this, i usually don't do a running bead first. I tack it in the corners then align it
after it cools down and the do the final weld
It is to be noted that the methods of welding will vary depending on many factors
the thickness of this tube is only 1.6mm. the amperage setting should be based on that.
there is specific numbers to dial but since I am using a low end machine,
I have to make a guess and try a few times before I tackle the final piece
if the amperage is too low the stick with stick to the work piece and if is too high , it will splatter or may be make a hole in the weld
and it will be a total pain to fill up those holes
these things can be learnt only by experience. no matter how many videos you follow
for thin materials i go for 12 gauge