Category Archives: How To Weld
learning how to use a mig welder is not as difficult as it may seem. It is is the easiest method of welding and is a valuable skill to learn both for your personal use and projects or as a spring board to employment. When you Learn the skills required your home workshop will never be the same, you will be able to tackle all kinds of projects such as furniture, work benches , brackets, racks, chassis and frames, gates, repair broken parts and even larger projects such as house beams and steel deck framework.
Mig Welding Employment
If you seek employment, learning how to use a mig welder gives you skills to open many new doors for you. There is a constant demand for semi skilled and skilled welders in fields such as production work, light and heavy engineering. Then there is the big money welder jobs in the oil and mineral industries. Once you learn Mig welding you also have the opportunity to start your own business. You could start out working from home making small items of furniture to sell at your local markets, over time your name will get around and you will find you will get as much work that you want.
Mig welding is commonly referred to as gas metal arc welding (GMAW), this type of welding is today the most popular and versatile method of welding. It is used in production and maintenance work and can be applied to heavy engineering, light engineering and construction work to auto body work. For example production line robotic welders in auto manufacture are Mig welders. Mig welding is perfect for day to day factory work as well as being ideal for the home or small workshop.
To get going fast with mig welding see our learn How to Weld Tutorial page.
Mig welding uses a power source and a wire feeder that feeds the wire electrode through the welding gun to the weld. The wire feed consists of a set of drive wheels for the wire and a constant speed motor to turn the drive wheels. The wire electrode comes in various coil sizes, or spools depending on the welds to be performed. These spools can be mild steel, stainless steel or aluminum in accordance to the job, and can contain hundreds and even thousands of feet/meters of wire. Most Welding machines have various functions allowing timed feeds and variable speeds.
The wire is feed through a cable that also contains a shielding gas hose and allows the electrode to run smoothly without bending or kinking. The shielding gas, or inert gas protects the weld from contamination during the welding process. Welding wires can differ with solid wires used for aluminum, stainless steel and mild steel, but also flux cored wires are also used for use on heavy steelwork.. A gasless wire is available for mild steel, this is useful in outdoor or on site situations where a gas bottle is impractical or breezes are a concern by blowing away any protective gases.
Inert gasses are gasses that will not react with metals or other gasses. With mig welding Inert gases are used to create a protective bubble around the arc and molten metal while the welding is being done. This gas is generally pure argon gas for aluminum and argon sheilding gas for mild steel applications.
Mig welding can be used to weld steel, stainless steel and aluminum , all requires slightly different gasses welding wires, and amperage settings. and due to the work requirements the heavier the metal being welded the more powerful welding machine needs to be.
For home mig welders a machine rated between 140 and 220 amps is most likely the best choice. This would allow working on metal thicknesses from 1/16″ up to 1/4″ including pipes, tubes, flat bar, round bar, angle iron, sheet metals and square hollow sections.
There’s about three typical methods how to weld stainless steel. SMAW (shielded metal arc) or just stick welding, GMAW, typically called Mig welding (metal inert gas), along with GTAW (tungsten inert gas) or alternatively Tig welding.
Stick or Arc welding.
The techniques for you to learn how to weld stainless-steel with an arc welder are little different to the welding of mild steel. Usually a smaller gauge stainless-steel electrode is required for the purpose of arc welding stainless-steels. Please note; be aware regarding finished welds,similar to mild steel welds, there’s a layer of slag still left over a finished bead, now with mild steels this slag requires chipping away, on the other hand a stainless steel weld has a tendency to ‘ping’ away while it cools down. This may result in severe damage to the eyes and so at all times use total eye safeguards when welding with stainless-steel welding rods.
Welding Stainless Steel Using A MIG.
Once again much the same procedure applied to mild steels. Naturally you will have to change your mild steel welding wire for stainless-steel welding wire. It’s usually obtainable in 304 as well as 316 grades. Make use of 316 grade stainless-steel wires in increased oxidation zones along with marine purposes. You will additionally want to use argon gas as opposed to c02 which is used for welding mild steel. The process of how to weld stainless steel by Mig welding is typical in the majority of steel manufacturing workshops.
Tig Welding Stainless Steel.
Welding stainless with a TIG is among the most tricky to learn .But in my estimation it’s the more rewarding of processes and gives a pure welded join to the welded joint.
How to weld steel utilizing a tig demands much more technical proficiency, it does however resembles working with the Oxy-Acetylene gas welding method. Tig welding machines feature a smaller hand-held torch which contains a tungsten electrode to generate its arc. Tungsten steel is utilised since it offers an higher than normal melting point. This tungsten electrode, whenever struck towards the steel produces the arc that will start the fusion process; at this stage a stainless steel filler rod will be used to increase substance into the joints. This is when the user requires a steady hand.
Learning to weld stainless steel boils down to making use of the appropriate tools and selecting the most effective procedure to do the job. Just for simple welding of stainless-steel the arc or mig method is going to be sufficient, however, if you’re looking for a high quality surface finish or even are producing a product that needs a nice and clean surface finish for example a industrial foods mixing component part or perhaps a top end bicycle your tig welder will be the best option. Just like every thing utilizing the appropriate procedure as well as plenty of practice will soon allow you to get to weld stainless steel to a professional level before you know it.
So start to learn how to weld there are several questions that need to be addressed. To begin we need to determine what metals or alloys we intend to weld and then we are to choose the process and welding machine to use with that process. here we offer a brief description of the main welding processes and the welding equipment we will need.
For the welding of mild steel, stainless steel and aluminum we can choose from three main processes. Arc welding, MIG welding and TIG welding.
Arc welding uses welding rods or welding electrodes as a means of joining metals. This is the most simple and most likely cheapest way to learn how to weld. Arc welding machines are readily available either new or second hand and are most suited for welding mild steel and stainless steel in thicknesses of 1/8th inch and upwards.
Mig welding and MIG welding machines would have to be the most versatile and easiest of the how to weld procedures to master. No need to change electrodes as the machine operates with a wire feed system and employs a spool of welding wire within the machine. Great for welding both sheet metals and heavier steels. Can be used for welding mild steel, stainless steel and aluminum. Great for welding thin metal like on motor vehicle body-work.
Mig welders generally use shielding gasses s part of the process that can be limiting in outdoor welding applications, however there are gasless welding wires on the market suitable for welding mild steel. Having a small portable mig welding machine that uses gas free welding wire is a most versatile welding machine.
Tig welding is a high tech approach to welding. This process takes time to master but will provide the best quality weld for small intricate jobs. Can be used with stainless steel, mild steel and aluminum welding. Tig welding can also be used for many exotic and specialized metals such as gold.
Tig welder machines can be small and compact such as the ‘caddy’ welders that are also capable of stick or arc welding. These machines are often seen on work sites and used by maintenance crews. A most versatile welding machine.