MIG Welding started in the 19th century. Ever since it kept getting advanced and complex due to the fair share of technology. People started coming up with ways that made it easier and easier but technology kept on making it harder and harder.
So, we gotta know what are the dos and don’ts and also get some MIG welding tips in the meantime. This’ll help us stay safe, work faster and be a pro.
How does it work?
High Voltage electricity is used to melt metal wires that are passed through the metal torch. The melted wire being applied on the welding spot later cools down to form a bond in between the workpieces.
All of this time the weld is covered by a shielding gas that prevents the weld from being oxidized. Shielding gas also comes out through the welding torch.
Tips for Safety from Common MIG Welding Jeopardy: Always Your #1 Priority
MIG welding is just another type of welding. As like ever other types of welding it has its hazard. Here’s what they are and some MIG welding tips for safety.
Welding is more or less working with fire. Of the three things, that’s needed to set off a combustion two is already there. Um talkin’ about ignition source and oxygen.
So, make sure there’s no flammable object nearby to complete the triangle.
Endangering Your Respiratory System
MIG welding works by removing oxygen from the working area using the Shielding Gas. At time’s this process leads to the production of Carbon Mono-Oxide (CO).
Carbon Mono-Oxide when enters your lungs and reaches bloodstream it binds with hemoglobin over oxygen. This causes the victim to suffocate and die.
Moreover, there are other factors at hand like the vaporization of the metal you’re welding, filler material that you’re using, or anything on the surface of the workpieces. This vapor might also harm you.
So, it’s better to use a respirator to be on the safe side.
Endangering Your Eye and Skin
Bright and hot metal arcs during MIG welding always will cause harm to your eyes and skin. Arcs are bright enough to burn out your cornea and most likely the outer membrane of your eye.
The arc also generates UV rays (Ultraviolet rays) which is a bit carcinogenic. Besides, there’s always splashing metals and flying hot debris which can burn your skin.
Repetitive Stress Injury (RSI)
Many welders set their torch with their helmet hoods raised and then heavily nods they had to make it all off. This over time might cause permanent damage to your muscles nerve, ligament or tendons.
So, have a good Auto-Darkening helmet and you’ll not have to raise the hood every time.
Tip on Avoiding Sponge MIG Weld
This is by far the most common MIG welding mistake made by noobs and even pros at times.
MIG welding has to be done on a completely clean surface. Otherwise, those contaminants are it oil, dirt or paint will remain within the weld. Later on, it’ll cause pores on the weld, making your weld look like a sponge.
To avoid this from happening always clean your welding spot. Use a chipping hammer to clean the welding spot.
Tips for a Clean MIG Weld
Current coming out through the wire has to get back to the welder to close the loop. But if there’s no ground at all or one nearby then you’ll start hearing somewhat of an explosive sound and the weld will not be a clean one.
MIG welding is all about preciseness. If you use one of your hands you’ll probably miss the spot. Many times, your hands will vibrate. This WILL mess up your welding.
To avoid this use both hands.
HOW? Place one of your hands on the crooked portion or the neck on the gun. And other on the trigger.
Getting the Right Sound
The sound will tell you a lot about the MIG welding. You’ll be hearing a sizzling sound when everything is perfect. It won’t be too loud either.
Somethings definitely wrong if you don’t hear this sound, it might be the machine itself, wire feeding settings or some other ones.
Crackling Sound and Small Arcs
If you notice there’s a crackling sound and the arc is smaller than usual and there’s a crackling too, then there’s an issue with the wire feed speed.
Slow down the wire feed and everything will be alright.
Just Crackling Sound
But if there’s just loud crackling sound and nothing else then there’s too high amperage. Turn down the amperage a bit and it’ll be alright.
Scratchy or Hoarse Sound
Scratchy or hoarse or raspy sound means the voltage is a bit too low. You’ll have to turn the voltage higher.
Wires in MIG welding drives through the Drive Rolls. You’ll have to match the size of the roll in your welder to the drive rolls. Otherwise, your wire feed speed will be messed up BIG TIME. And you’ll never be able to fix it by changing the wire feed speed
Measurement of the wire for the drive rolls are written on the edge, match it with the size of your roll and use it.
Push …Pull ….Which One?
There’s a big debate Push or Pull. Some say there’s no difference between the two others say there is.
Well, what do those who believe there’s a difference has to say?
Push welding causes the weld not too deep and makes the weld smooth and wide.
Whereas the Pull does just the opposite. It causes the penetration to be a bit too deep and the overall weld to be narrow.
So, choose between the two depending on the thickness of the metal you’re welding.
Overhead MIG Welding
When doing overhead welding with MIG it’s recommended that you keep the weld pool small. But Why? It’ll help you with controlling your welding beads. Besides using a smaller diameter wire helps out a lot in these cases too.
Keep Changing Tips
Having a damaged tip causes issues with arcs. So be liberal with tips and keep on changing ‘em. Tips usually get damages once it touches the weld. And they get worn out after about 100 lbs of wire.
MIG Weld Heavy Metals …..??!!
Yeah, it’s feasible. You’ll just have to keep on welding at the same place over and over.
MIG Welders keep on making some common mistakes be it a pro and let’s not get to a noob. There are multiple factors on which we need to have proper precautions to have the safety. So, I’ve talked about some safety tips. Besides, there are things which need to be get done to have a proper weld. So I’ve talked about a lot of MIG Welding tips.