MIG or metal inert gas welding is one of the most significant advancements in Metal fabrication. The method is widespread in welding auto-body parts, low-alloy steels, and doing metal repairs at home. It is one of the most straightforward welding techniques, as well as the method that most welders prefer. Every MIG welder requires to have some necessary information before he or she can pick up the equipment and start welding various metals together. Throughout this post, you are going to learn more about the shielded wire MIG welding. Every information is not only going to help you become a prolific welder but also give you a hang of what you should expect.
What does the MIG welding process entail?
The whole MIG process entails joining two or more metals together in basic terms. For this to happen, you need to form an electric arc between a wire electrode and the piece of metal you are welding. You thus have first to feed the gas-shielded wire electrode through a MIG gun. The MIG welder is what controls the MIG gun, which ensures the wire goes into the molten weld pool.
The MIG gun releases a shielding gas to the welding pool to prevent any contamination that may prevent a clean finish. The whole process is much more mechanical and electrical, but once you start doing it, you are going to find it more manageable than other welding processes.
How to set up a MIG welder
Before you take any steps to start welding two materials together, you have to make sure you know how to set up the welder. It is the only way for it to work excellently throughout the fabrication process. Any error you make during setup can lead to either a poor weld or a disruption somewhere along the welding process. The main steps include:
Open up the MIG cabinet, unscrew the spindle cap, and on the spindle, slide in the wire coil. The wire should be on the bottom of the MIG machine facing the driver roll.
Open up the pressure release and adjust the tightness of the pressure roll.
While ensuring no bends whatsoever, gently feed your IG wire to the entry of the drive roll.
To keep the spool from rolling continuously and damaging the wire, you need to put the spring in place and place the cap on the wire spool.
Use a pair of pliers to remove the MIG nozzle as well as the contact tip.
Start feeding the wire to the short gun by pressing the trigger. You can then put the contact tip and the nozzle back on. Once you finish, your MIG machine is going to be ready for use. Keep in mind that as the voltage increases, the wire feed is also going to increase. You should thus ensure that the rate is set correctly for efficient and clean welding.
Before you learn how to weld and the welding techniques available. You need to learn the different welding joints. These include the corner joint, lap joint, T joint, and the corner joint. The welding technique you use depends on the joints you are going to make. It means that you don’t just push the handle in a straight line as you fabricate pieces of metal. The welding technique also depends on the torch movement. The methods include:
You can also call this the pulling process. The method requires you to hold the gun at 10 degrees angle. You should then use a backhand position to pull the gun towards your body. The technique is famous for achieving deeper penetration without the beads building up between the joints. You also get to produce a clean weld and minimum contamination, which simplifies to none as you continue learning the technique. It is also straightforward. All you have to do is maintain absolute keenness for you to come up with an incredible weld.
The forehand or push technique is the complete opposite of the backhand method. It is one of the most common welding techniques since it is hard to get any contamination from the atmosphere. Just like the pull technique, you have to hold the welding gun at a 10-degree angle or slightly below. You should then push the gun towards the direction you are planning to weld. You should also note that if you change the angle of welding, you are likely to end up with a slightly different bead.
The above techniques dictate the type of welding bead you end up with during welding. The cursive e weld bead is the most popular type of weld. It is not only clean but also very smooth. It is mostly applicable to huge metals.
The cursive V Weld, on the other, is famous for welding both vertical and overhead welds. The finish prevents the weld beats from dripping down or through the joints. You thus get a clean finish on the other side. They are so far the MIG basics that are going to see you have an easy time fabricating.
The information above contains essential details that a beginner requires to know about shielded wire MIG welding before he or she starts welding. You must know how to set up the MIG welding equipment and the basic techniques you should use to achieve clean welds.