December 20th, 2004 
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Not all metals can be processed without effort by welding procedures; there are some with very high conductivity properties that accumulate and generate heat almost instantly: it is the case of aluminum and magnesium. These metals came to be used only as late as the 1940s by means of special welding procedures known as MIG welding that has now been largely replaced by the process known as tungsten inert gas or tig welding. Presently, tig welding is used for almost all aluminum workpieces that require exemplary execution. The electric arc is formed between a tungsten electrode and the metal surface, the result being a very clean weld without any signs of oxidation whatsoever.
Tig welding is an automatic or semi-automatic process that allows the creation of continuous long and durable welds that wouldn’t be possible otherwise. The best gas shield required by tig welding is helium, argon or their mixture since, in association, these two chemicals increase the welding speed and the power of the process for deep workpiece usage. However, argon is welders’ favorite gas where tig welding is concerned; the explanation for this preference lies in the density of the gas – heavier than air – and its high quality coverage.
Why is the presence of the inert gas so important for tig welding? The flow of argon passes through the welding device simultaneously with the electrode, and during the process it acts as a shield against various contaminants present in the atmosphere that may affect one way or the result of the procedure. To put it in simple words, the argon keeps the air away from the weld area. Though tig welding can presently be used to create all sorts of very fine welds, steel and aluminum are still the metals the most widely associated with the tungsten inert gas procedure.
The pieces of equipment also need to be adjusted to the requirements of tig welding; for instance there are several types of joints especially created for the purpose. We could mention t-joints, corner joints, lap and butt joints here, some of them need a filler rod, some others don’t. The independent form is the butt joint where the pieces of metal are connected along the seams. The use of each the above in tig welding processes involves different types of seams and placings of the metal pieces. Good knowledge of process specificity is an absolute must here.
Watch the video related to welding
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Help answer the question about welding
How the enormous strain caused by welding are removed?A ship body is covered by a lot of steel plates that are put together by electric welding. I wonder how the enormous strain caused by welding are removed.
About Author
Muna wa Wanjiru Has Been Researching and Reporting on Welding for Years. For More Information on Tig Welding, Visit His Site at TIG WELDING
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I’m sure I lived in that building. In the aparment those two windows on the right go in to. This is really weird to see.
(my username is purely coincidental btw)
oh my god. stupid landlords.
The fabrication of hull of large ships is normally done by panels assembled into blocks then the blocks are assembled into sections of the vessel and finally the sections are joined to form the hull.
First, panels consisting of plates and stiffeners are made. In the fabrication of the panels submerged arc welding is most suitable since most of the welding are made on flat surfaces and these can be done using automatic welding machines. Several of these machines can be run by a single operator
.For the assembly of the blocks however, most of the welding operations are done manually because automatic welding machines may no longer be suitable.
Manual arc welding is also used in the assembly of the blocks to form a section of the vessel and also for welding the sections of the hull together.
My suggestion is that you take one of those 6 week welding courses at the local college.
You just don't start by reading a book.
Now i have an office job, but i have been a welder fitter for 20 years.
Make sure the first thing you buy is a fire extinguisher
The WPS is the specific directions instructing the welder in how to execute the weld. It would specify method (mig, co2, stick, submerged arc, etc.), material for the base metal and the filler metal, directions of travel, position of the weld (horizontal, vertical, angular, etc), voltage, and similar variables.
Any WPS must be qualified to demonstrate that it produces the weld characteristics that are desired. It then becomes the recipe so to speak for each welder to follow.
A WPS is typically written by a person experienced in welding.
get an arc welder that has at least 200 amps dc
a name brand such as lincoln miller etc
practice with the 6013
switch to 7018 for higher strength
mig welds are strong but brittle they will break without warning if overloaded
and yes i know a lot of shops use the mig on everything
but if they see what i see all of the time they wouldn,t
arc welds will usually start cracking before they fail
on the lighter metals you are talking about the mig would be ok or if you plan to do any aluminum welding
but if you want to go to heavier metal later the arc welder is better
most of my welding is done on 3/4 inch or thicker metal
i will use my mig if it is nonstructural
if you think what i say about a mig is not true try fillet welds on 1/4 inch plate then bend them
you use what is most comfortable you need to be able to see the puddle of molten metal to make sure you have good penetration and a decent looking bead I prefer a glass #10 and a glass cover plate how ever I'm thinking of buying a self darkening helmet as the price has come down to around $ 50 the auto darkening system has been on the market for about 15-20 years my brother bought one when they first came out and paid about $ 275 but the novelty wore off for him you can get a auto darkening from http://www.harbor freight.com Do not look at the light with out a welding lens as you will burn your eyes out!
good job fera!
Crazy. . . It’s awesome that you got it all on video though. I’d love to see the welder guys deny that in court.
welding is a physically demanding job, regardless of the type, most of the time you are sitting or standing for long periods of time, but it is also a great trade to have, if your asking about strength, it depends on the job, if you are production welding then you do not need to be very strong, but if you are a welder-fitter you would need alot of strength, because you would be handling material by hand and it can get pretty heavy, basically its up to you to know what type of welding you want to get into, and if you feel that it would be right for you in a physical sense. hope that helps with your question, good luck.
you may want to do a search on that (google). That may give u the help u need. Good luck!
Ramshack-ian!
You'll probably need a formal internship or apprenticeship. Especially in this economy, there's no shortage of experienced workers.
Do not use welding glass. It does not protect camera lens at all.
Go to a store and buy appropriate filter even a bigger one and attach it to your camera.