October 1st, 2007 
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Plasma cutters can cut steel and other metals of different thicknesses using a plasma torch. Plasma can also be used for plasma arc welding and other applications.
Plasma cutters are available in various shapes and sizes. All plasma cutters function on the same principle and are constructed around roughly the same design. Plasma cutters send pressurized gas, such as nitrogen, argon, or oxygen through a small channel. In the center of this channel, you’ll find a negatively charged electrode.
Plasma cutters can cut different shapes in metals properly. It is a very simple and economic technique. With the help of these cutters, the cutting work can be done accurately, in full speed and cut any type of metal in any shape. Due to low level skill, plasma cutters are threat to conventional metalworking tools. Plasma causes the energy to break apart the gas molecules and the atoms begin to split. Generally atoms have protons and neutrons in the nucleus, surrounded with electrons. But in case of plasma cutters, electrons separate from the nucleus. Once the energy of heat releases the electrons from the atom, the electrons begin to move around quickly. If you notice most of the electrons are negatively charged and leave behind positively charged nuclei, known as ions. Electrons crash with other electrons and ions, which releases vast amount of energy, creating plasma and unbelievable cutting power.
Plasma cutters are widely used in auto shops as well as by car manufacturers to customize and create chassis and frames. Even construction companies use plasma cutters in large-scale projects to cut and fabricate huge beams or metal-sheet goods. Locksmiths use plasma cutters to bore into safes and vaults when customers have been locked out.
One major benefit of plasma cutter is that the surface of the metal outside of the cutting area remains relatively cool; this prevents the warping and paint damage that can occur with other flame cutters. A thin heat affected zone also allows the use of templates for precise curved line cutting. Plasma cutters do well as gougers and can pierce metal quickly and accurately.
Plasma cutters are also used in CNC (computer numerically controlled) machinery. The idea behind CNC tables is to allow a computer to control the torch head making clean sharp cuts. Nowadays, CNC plasma equipment can cut thick material, which provides opportunity for complex welding seams on CNC welding equipment that is not possible otherwise. For cutting thinner material, plasma cutter is replaced by laser cutting, due to superior hole-cutting abilities. CNC plasma cutters are also used in HVAC industry. In the present scenario, there is more development in CNC plasma cutting Machinery. In the past, cutting machine was horizontal in shape, but due to improvement in technology, vertical CNC plasma cutting machines are available.
Watch the video related to tig welding
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Help answer the question about tig welding
When tig welding, if there is moisture in the argon gas, does this contaminate the weld, and hurt the welder?About Author
Brayan Peter is an expert author for Welding Supply, Welding Equipments. He written many articles like Welders, Welding Machines, TIG Welding Equipment, welding helmets, Diesel Generators, Plasma Cutters. For more information visit our site http://www.everlastgenerators.com. Contact him at weldings.info@gmail.com
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The short answer is no.
There is not a massive amount of industry around the coastal areas of spain , and any welding work would really be centred around making Gates , Fences and Rejas ( Security Grilles ). If this is something that you are able to do then my advise would be to looking at starting this as your own business because you would struggle to find reasonably well paid work like this on a permanent legal contract here in Spain
There is a big difference between MIG and TIG welding, in both the process, and the skill level required of the weldor. They really are two different processes altogether, and the MIG is the much easier of the two.
There is much to read on the web, including some great information at the Miller and Lincoln websites. They can give you a pretty great overview of TIG welding. But, as with many skills, it takes hands-on practice as well as study, to be successful.
If your fiance has ever welded with a gas torch, he might already have the skills he needs. Unlike a MIG welder, a TIG does not feed an electrified filler wire for you. You are in control of a separate heat source (the torch) that you must manipulate in order to melt the base metal together, while adding the filler by hand to the molten puddle you're creating. It's the same way a gas torch works, just with electricity, rather than gas, as the heat source.
The tricky part comes in learning how hot to make the puddle, how much heat to apply (with a foot or hand controller), and how to coordinate the filler at the same time. Quite often, TIG welding involves metals like aluminum or stainless, which have their own quirks that need to be considered. It's by no means impossible to learn all of this…and it can be a very valuable skill to have, often paying higher than MIG welding jobs.
If your fiance shows this prospective employer that he is a professional who takes pride in his work, has studied the subject, and is willing to learn, he may get his foot in the door and start down a new path on his welding career. I wish him the best. Study all you can, and if you know a buddy who is good with the Oxy-Acetylene torch, go visit him right away for some practice!
Best of Luck!
Mig and TIG welding are all arc welding. TIG is arc welding in the presence of a tungsten electrode which is non-consumable and an inert gas and the welded material. This is usually used in the aircraft industry. MIG welding is still arc welding in the presence of argon and wire feed consumable. TIG is usually a better welding technique. These are different from stick arc welding which uses flux coated sticks in developing an arc.
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What is right for you, MIG or TIG? For certain type of work TIG is required, like welding chrome moly for some racing organizations. Intricate work, like gunsmithing is also well suited to TIG. TIG is used by many auto restorers who prefer a more precise, perfect finish that requires little to no finish work. TIG is most similar to gas welding in technique, so if you've done oxy-fuel welding, TIG should be a natural transition.
TIG stands for Tungsten Inert Gas welding. Also called GTAW (Gas Tungsten Arc Welding) and Heliarc® which was Linde's trade name for the TIG process when it was introduced many years ago. The arc is started with a tungsten electrode shielded by inert gas and filler rod is fed into the weld puddle separately. A slower process than MIG, it produces a more precise weld and can be used at lower amperages for thinner metal and can be used on exotic metals. TIG does require quite a bit more time than MIG to learn. It is similar in technique to gas welding.
MIG is required by law and by insurance companies in many localities for structural repair of automotive frames. MIG is also much easier to learn and faster to weld. For doing other types of welding, like sheet metal, it can be a matter of personal preference. For an auto body repair shop or a novice welder, a MIG is a good, practical all-around welder.
After welding and if application is critical , solution annealing is preferable.
You will weld in accordance to the weld procedures that will be given to you for the specific materials mentioned.
What's your question?
I was working for a company welding aircraft parts. APU assemblies for boeing, lear, and raytheon. I was recieving $18 and hour but would have been able to make more through raises and fringe benefits. i ended up quitting because they cut out all overtime. I need certs for all kinds of AL, S.S., And CrMo. I had to get tube, and plate from .020 to .375 certs before I even started welding on the parts and that took a couple of weeks….
I think a lot of people hear about guys making $40 an hour and think they can jump in on that but what they don't realize is those guys have been doing it for years and have recived annual raises etc.
What you have to your advantage is being able to Oxygen- Acetylene weld. You need to be able to use both hands. One to manipulate the TIG Torch and the other hand to feed and dip the filler wire. Good Luck !
When you talk about pulse tig it is mostly DC welding. You use the pulse to help reduce the distortion. It is mostly used on all ferrous metals. You do not need or have the pulse feature on AC for aluminum. You would need an AC or AC/DC machine for tig welding aluminum. They are some what costly. When tig welding you need to stay with the better name brand welders. Thermal arc, Hobart, Miller, and Lincoln are all good machines. To weld 1/4" aluminum you need approximately 200 or more amps. So this puts you into a machine that is in the $2000 range. Then you need a bottle of argon gas. If welding for any length of time at those amps you would need a water cooled torch. Not to mention the water cooler, foot pedal and all the other items needed. All these items are costly. I am not trying to discourage you but you need to know it is going to cost you some bucks to invest in all the equipment you will need. Good luck!
(30 years as a certified welder)
Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually an inert gas such as argon), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma.
GTAW is most commonly used to weld thin sections of stainless steel and light metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing procedures such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. A related process, plasma arc welding, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated.