Basics Welding information,Basics Welding,MIG Welding,TIG Welding

Basics Welding information

Welders are everywhere, and they are doing amazing things. From diving a few hundred feet underwater to repair a few holes sprung in a steel ship out at sea to out in the cold vacuum of space, welding on a spacecraft that requires repair…Or even (and just as practical) you might just find an old bloke that simply wants to weld together a nice new steel table for his workshop.

Whatever the case, if you’re interested in taking up welding yourself, enrolling in specialized training to suit your goals is always the best way to learn. If you’re a DIY type of person and enjoy a little trial and error, this article can serve to help you understand some of the basic processes and rules when it comes to beginner welding techniques.

Safety

First off, like with any work in the machine or steel working industry, a conversation on safety is necessary. For beginners, understanding the dangers and safety precautions necessary in the workplace is a fundamental step in becoming a great welder.

For the sake of avoiding this article becoming a guide on workplace safety itself, we highly recommend reading Safe Work Australia’s Model Code of Practice on Welding Processes. This outlines everything you need to know about safety standards, discussing all topics from identifying possible hazards to proper ventilation and protective equipment.

Understanding the Process
Basic welding is more than just melting two pieces of metal together, first, you must consider the type of welding machine you will use and what job you’ll be using it for Arc welding.

Now there are a variety of different methods of Arc welding, although the most common processes are Metal Inert Gas (MIG) welding, Tungsten Insert Gas (TIG) welding, and Stick welding.

MIG WELDING

MIG Welding is regarded as the easiest type of welding to learn, it works by using a wired welding electrode on a spool that is automatically fed through at a constant speed as you work. The arc melts the wire and joins it together at the base, resulting in a strong and clean weld.

The reason why gas is used in this welding technique is that it provides a shield of fog that surrounds the puddle of hot liquid metal created when welding at intense temperatures. This gas shield keeps the weld puddle free of any contaminants and is what helps ensure a strong weld with low porosity (the empty spaces in a material. A clear downfall of this method though is using a gas requires an environment usually indoors and away from any wind or elements that might blow the gas away. This can be remedied with gas-less MIG welding, which uses flux-core wire. Flux-core wire is similarly fed through automatically and is made with a coating that creates the gas while you weld- This option provides a messier finish, with welds requiring more clean-up, and flux-core wire can be pricey.

TIG WELDING

TIG welding, on the other hand, is harder to learn and takes some practice before you can master it.

TIG welding is more physically complicated, as it requires a large welding rod to be fed manually into the weld puddle, and also uses a protective gas to protect the weld puddle. When TIG welding, you need to simultaneously: control the torch, feed the wire, move at the correct speed, and also use the correct current. This is usually used for thinner gauged metals and can be applied when working on toolboxes or kitchen sinks for example.

STICK WELDING

Similar to TIG, Stick welding involves using a fixed-length electrode in joining metals, being a fixed length, the electrode is manually fed by the welder.
A downside to stick welding though is that it often provides a messy finish and would not be a viable option where a smooth, clean finish is desired (such as in sheet metal working for automobiles).