Is the welding stronger than the original metal

Welding - what do you need? The basics of welding equipment for beginners

It doesn't matter whether you want to mend a rattling exhaust or weld your own DIY furniture: With a little practice and the right equipment, hobby welding is easier to learn than you might think at first.

Here you can find out which welding equipment you need to get started and what to look out for when buying.

 

Choice of welding method

Before you can worry about the equipment, you need to decide on a welding method. It should be noted that the choice of welding method depends on many factors.

  • Material thickness,
  • Scope of the project and
  • the price

are certainly the three most important aspects that you should consider.

In the private sector that is Arc welding by far the most popular method. More precisely, arc welding is only the umbrella term for all welding methods in which a visible arc burns between the electrode and the workpiece.

MIG (metal inert gas welding)

1 Feed direction 2 Contact sleeve 3 Welding wire 4 Shielding gas 5 Melting material 6 Welding bead 7 Base material
Nathaniel C. Sheetz, GMAW weld area, CC BY-SA 3.0

MIG (metal inert gas welding) is often more suitable for beginners, because the welding wire also serves as an electrode and is fed into the arc via a feed. The inert gas ensures that the melting electrode does not react with the ambient air. The gas protects the liquid metal under the arc from oxidation, which would weaken the weld seam. For this reason, MIG is one of the arc welding machines Inert gas welding process.

As a Vairante there is still that Metal active gas welding (MAG) with reactive gases that cause the desired chemical reactions.

Video: Introduction to MIG welding

Part 1

Part 2

part 3

TIG (tungsten inert gas welding)

Kolossos, GTAW-de, CC BY-SA 3.0

Tungsten inert gas welding (TIG welding, also known as Arcatom welding or in the USA Tungsten Inert Gaswelding (TIG) or Gas Tungsten Arc Welding (GTAW)) is also a popular gas shielded welding process and is one of the arc welding processes. Here an electric one burns Arc between the workpiece and a tungsten electrode, but this does not melt away. A mostly used but optional one Filler material is held in the arc as a wire or rod and melted. In addition, the arc melts the base material.

In order to avoid a reaction of the melt with the ambient air, come Protective gases such as argon or helium, which are inert (= do not enter into any chemical reactions with the materials involved).

The advantage is that with TIG welding high seam quality can be achieved. That's what it is for slower than MIG welding and is considered to be more difficult to learn.

Video: TIG welding

 

recommendation

With the MIG welding, you're on the safer sideif you want to teach yourself how to use it. If you choose to do this, you will have to take care of a MIG welding machine and other equipment, which are discussed below.

"Six Swiss sword welderswelding sweating six Swiss swords. "

Tongue-twister

 

welding machine

The welder is by far yours largest initial edition. Fortunately, some manufacturers now offer good inert gas welding equipment that is perfectly adequate for beginners for a moderate one Price between 300 and 500 euros at. Professional devices well over 500 euros are not necessary as an initial device.

The generic term inert gas welding device is subdivided into MIG, TIG and combination devices.

There are also combination tools that you can use to weld both processes.

MIG welding

MIG welding machines have a automatic wire feed, in which the wire to be welded first has to be wound on a reel and then fed continuously during welding. To ignite the arc, the trigger on the welding gun must be pulled. As long as the trigger is held, the wire and shielding gas are fed to the welding point. The heat of the arc causes the workpiece and the electrode (wire) to fuse together to form a firm connection in the form of a weld seam.

Current MIG welding machine offers:



 

TIG welding

The filler material is supplied as a welding rod for manual welding and as a welding wire for mechanical welding.

Current TIG welding machine offers:



 

Combination devices:



 

Once you have decided on a specific welding machine, you need a suitable welding wire and shielding gas.

 

Wire and shielding gas

In terms of quantity, the wire is very inexpensive and extremely easy to use. The welding wire is wound on a spool and sold in various thicknesses. Common wire diameters depending on the thickness of the workpiece to be welded are 0.8, 1 and 1.2 mm.

Most welding machines can handle at least two wire diameters, so you can weld a range of material thicknesses. Aside from the diameter of the welding wire, you also need to be careful about that Material matched to the workpiece is.

Even with the protective gas, you cannot choose just any one, you have to choose one that suits the Welding process adapted to your choice is. MIG uses inert, i.e. inactive gases that do not react chemically. This can be argon, carbon dioxide, oxygen or helium. Argon 4.6 or protective gas 18 is often used, which consists of 82% argon and 12% carbon dioxide.

Current shielding gas and welding wire offers:





The German word "welding" comes from the old high German sueizan (= "Make hot", "heat"). It corresponds to the Old Norse sviða and was between 800 and 1000 AD used.

 

Welding helmet

The arc is so bright that Flashes and damage to the eye are inevitable if you do not use adequate eye protection. Automatically darkening helmets have become standard so you don't have to keep lifting your mask when you're not welding. The automatic blackout only sets in when bright light is emitted by the arc. Within fractions of a second, sensors on the helmet detect the arc and darken the field of vision so much that the eyes are protected.

If the arc goes out, the view brightens up again, so that you can continue working through the lens of the helmet without interrupting the work flow.



 

Welding goggles are not an alternative to the light-intensive arc welding processes. The darkening of such glasses is only sufficient for low-light welding processes or auxiliary work, but not for a direct view into an arc.

 

protective gear

Aside from protection from radiation, you also need protective clothing that keeps you safe from flying sparks shields. There is also special protective work clothing, for which you have to pay a small fortune, however.

If you want to spend significantly less, a couple is enough Welding gloves and a Welding apron made of leather paired with a fireproof undergarments and sturdy shoes.





I would never weld without work shoes. See our own post about this:

Work shoes - what should you watch out for?

Work shoes - what should you watch out for? Protection for the feet is not "for the feet"

The feet carry everyone between 25,000 and a million kilometers through life. In order to protect the indispensable mode of transport, there are increased demands on shoes for risky activities and activities. There are legal regulations in professional life. You should consider these points when buying work shoes.

Continue reading ...

 

Cinder hammer

Only applies to thatElectrode welding: When welding arises slagthat must be tapped from the seam to reveal the actual welding result. A cinder hammer has a head with two different shaped ends. One side tapers so that you can tap off slag at certain points. The other side is shaped like a chisel to remove slag from longer welds.

No slag is produced when welding with shielding gas.



 

In addition, a Wire brush are used to remove the last remaining slag and polish the workpiece.



Welding gun

Last but not least, welding tongs are needed to handle the Wire length cut can be. Some welding guns also have other functions. So you can with a Multifunctional pliers for example also the Clean the gas nozzle or pull the nozzles off the welding torch.



Conclusion - welding: you need that!

Much of the welding equipment only needs to be bought once and then lasts for many years or even decades. The running costs are limited to the electricity, the wire and the gas.

At the bottom you can get a Equipment from around 500 euros put together. Beginners who want to invest a little more money in their welding machine and accessories can get equipment for 750 euros that is completely sufficient for most applications in the private sector.

Who wants to work more professionally or higher expectations depends on the welding result, the shielding gas and wire must be precisely matched to the workpiece used and the objectives of the welding.

If the welding equipment is allowed to cost upwards of 1,000 euros, there is then in addition to extensive, high-quality accessories also welding equipment that is for you semi-professional use suffice. Special welding requirements can also be met or more materials can be welded. Alternatively, in special cases, you can let a professional weld.

Many thanks to Mr. B. Tröger for the valuable additions and corrections to the article.

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Posted by Building and DIY
Last updated: December 10, 2020