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Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together. This guide will teach you how to weld steel with a flux core welder. It is essential that you are already familiar with working with metal, such as cutting it, and are aware of the safety measures associated with this type of work.
Article Edit. Learn why people trust wikiHow. Author Info Updated: October 5, To create this article, volunteer authors worked to edit and improve it over time. This article has also been viewed 14, times. Learn more Explore this Article Setup. Finishing The Weld. Practicing Welding. Show 1 more Show less Tips and Warnings. Things You'll Need.One of the very first times I turned my MIG welder on and tried making my first weld I noticed it was making the odd popping sound with my weld and I wondered what I could do to fix this issue.
Why is my MIG welder popping? MIG welders often create a popping noise if the wire speed is either to fast or to slow and not set correctly. Even though wire speed is the main culprit for the reason why your MIG welder could be popping and producing an inconsistent weld there are actually several major factors that will help you avoid this altogether. In this articleI will show you how you can fine-tune your welder to avoid this. The main reason your MIG welder will pop is that your wire speed is either to slow or to fast.
To test this simply hold your welder up to a piece of metal you are trying to weld. Hold the trigger and if the welder makes a loud popping noise and tries to push the gun back it means the wire speed is not set right and needs to be adjusted. When it comes down to it wire speed is probably the main factor as to why your welder is popping but there can be multiple causes that are making your welder pop.
First off, the thickness of your material matters. More importantly, the slower you go deep you will penetrate into the metal. The size of your wire also factors into whether or not your welder will pop. Different size wires will need to run and different speeds to avoid popping. For example, a 0. Side Note: Be sure to check your owners manual for the optimal settings before you start welding.
For example, if you are using flux core wire it will run at totally different speeds than solid core wire.
If are welding aluminum then it will run differently than stainless steel. Next to wire-speed amperage is probably the second most important factor in avoiding popping with your welder. Not having this set correctly set may be making your wire burn to hot or too cold. To figure out the amperage you should be running take the thickness of the metal you are welding and multiply it by So now that you know the factors that cause a MIG welder to pop you might be wonder how do you stop it from actually popping.
The first thing to obviously look at is your wire speed itself. Some people like to think that a faster wire speed makes them look better and get more done. To start simply adjust your wire speed up or down till you get a constant buzzing sound as you weld. Often times the tip can get plugged with splatter, dirt or even burn back into the tip causing the welding wire to stick.
Next, check the wire size and make sure you have the right wire size in your welder. This is a common mistake that can happen real easily. This recently happened to me when our supplier dropped off some welding wire and it was a 0. It this case the welding wire was running slow and since we are set up for 0. Another thing to look for is if your wire is rusty.
Often times if your wire sits out in the open in a shop or garage it will start to rust especially if their is a lot of moisture. Running rusty wire can cause your wire to stick as it passes through your welding gun and give it a jerking motion which will cause it to pop. To solve this issue either replace the wire with a fresh role if its very rusty or put a shop rag on the wire and clamp a close pin on it to help remove the dirt and rust as it passes through the welder.M ig welding is characterized by sparks and spatter flying all over the place.
It looks great on movies, but when we are doing the welding we realize spatter is a bad thing. It creates more work by increasing clean up time, it wastes material, and it can burn you if you are not wearing the right PPE. It is almost impossible to eliminate spatter in MIG welding, but we can certainly reduce it by understanding what causes it in the first place. We have to weld with what we have. So we are not going to talk about how equipment can help eliminate spatter.
This list are items that you can change right now and for free. Incorrect settings — procedures that are out of whack will cause spatter. Amperage, voltage and electrical stick out a crucial. Amperage in GMAW is determined by your wire feed speed. Running amperage that is too high will cause spatter.
To correct either lower the amperage by decreasing the wire feed speed or increase the voltage. Per the above, if your voltage is too low your spatter levels will increase.
Increase your voltage until spatter decreases. Electrical stick out is the distance from your contact tip to the work piece. A bit more for high amperage. Excessive stick out will increase spatter somewhat, but it will create bigger problems porosity due to lack of shielding gas and lack of penetration.
Work angle too steep — there is a debate on whether pushing or dragging while mig welding is the way to go. Regardless of which you prefer make sure your drag pull or push work angle does not exceed about 15 degrees.
At times there is no choice if reach is a problem. But when you can control it do not exceed 15 degrees. Steep angles generate a lot of spatter. Surface Contaminants — rust, oil, paint and other surface contaminants will create spatter. Clean surfaces as best as possible prior to welding. Mode of Metal Transfer — Short arc and globular transfers are modes of metal transfer that produce a lot of spatter.
To drastically reduce spatter you need to achieve spray transfer. However, you also need to be above the transition currents for the diameter of wire you are running. Smaller machines will not be capable of this. Erratic Feeding — when the wire feeder cannot feed wire at a constant speed there will be fluctuations in amperage that will drastically affect the arc causing a lot of spatter. For help in correcting this problem take a look at Troubleshooting Erratic Wire Feeding.
In robotic applications and other situations in which wire consistency is critical shy away from the cheap-low quality wires. A single spool or drum may be consistent, but across several spools or drums there may be variations in wire diameter, copper coating, and chemistry.
Unfortunately AWS allows for such wide range of chemistry that even a coat hanger can be made into a mig wire. The best manufactures keep their own ranges and tolerances and thus produce better product.
Bad Shielding Gas — This is very uncommon, but shielding gases of low quality can affect spatter levels. What is more common is mislabeling i. The higher the argon content the smoother the arc.
If you think it looks too complicated to get rid of spatter take a look at what it can be costing you: The Real Cost of Welding Spatter. Finally a word on anti-spatter.
Anti-spatter does not eliminate or prevent spatter.I would highly recommend investing in an auto-darkenning filter, or auto-darkening helmet.
Flash is magnificently unpleasant, and over time can do very real damage to your eyesight. Remember to move slowly and allow a puddle to develop, people tend to want to move the gun as fast as the wire is feeding.
Remember this. Voltage sets the arc length, wire speed sets the heat. There is short-circuit, globule and spray.
If the voltage is too high, and the wire speed too low, the wire will burn back, feed, make contact, burn back, feed…. Over and over again, sputtering and having terrible trouble. This feeling is very noticeable, and you will feel it happening. The settings on the chart are only recommendations, and there are many factors that can affect the optimum position for these settings.
If the wire seems to be burning off, losing the arc, advancing, reestablishing the arc and burning off again, you are deffinitely either running too high a voltage or too low a wire speed. I have two more recommendations: Join the AWS. The Welding Journal, published montly by the AWS has very useful information — the most recent issue has a very good primer on TIG welding aluminum, and a thorough discussion of preparing your tungsten electrodes.
My next recommendation: Get a gas shielding kit. Even if you stick with flux core, the wire benefits greatly from having an additional shielding gas. Latest Phillip Torrone. By Phillip Torrone Phillip Torrone. If you need metal stuck together, there is no quicker path than buying a portable volt wire-feed welder.
MAKE 03 — Page Welding archives — Link. Related Stories from Make:.
All You Need To Know About Flux Core Welding
Fortunately, with some know-how and a bit of practice, you can prevent some of the common problems associated with the process and gain the weld quality you need. Tip One: Avoid Wire Feeding Problems Wire feed stoppages and malfunctions are common problems on many job sites and they can cause a considerable amount of downtime. The two most prevalent type of wire feeding problems—burnback and birdnesting—tend to extinguish the arc prematurely, which in turn can lead to weld defects.
To prevent birdnesting—a tangle of wire that halts the wire from being fed—during FCAW welding, always use knurled V- or U-groove drive rolls in your wire feeder. Compared to a GMAW solid welding wire which uses a smooth V-groove drive rollFCAW wire is much softer due to its tubular design and if you use the incorrect drive roll, it can easily compress the wire.
Prevent burnback, as shown here, by having the appropriate wire feed speed and MIG gun to work piece distance. Additionally, setting the correct drive roll tension can prevent the wire from flattening and becoming tangled. To set the proper tension, begin by releasing the tension on the drive rolls. Increase the tension while feeding the wire into the palm of your welding glove and continue to increase the tension one half turn past wire slippage.
Using the correct drive rolls and tension settings can prevent birdnesting. Other causes of birdnesting include blockages in the liner, improperly trimmed liners or using the wrong liner. Be certain that the liner does not have any burrs or sharp edges and always use the correct size liner for your diameter of welding wire. Tip Two: Stop Porosity and Worm Tracking Porosity and wormtracking are both common weld discontinuities that can weaken the integrity of your welds.
Porosity results when gas becomes trapped in the weld metal and can appear at any specific point on the weld or along its full length. To prevent this problem, remove any rust, grease, paint, coatings, oil, moisture and dirt from the base metal prior to welding. Using filler metals with added deoxidizers also helps weld through such contaminants, but these products should never replace proper pre-cleaning. Next, maintain an appropriate electrode extension or stick-out. To prevent worm tracking—marks on the surface of the weld bead caused by gas that the flux in the core of the wire creates—avoid excessive voltage for your given wire feed setting and amperage.
It is best to follow the parameters recommended by the filler metal manufacturer for the specific diameter of welding wire. If worm tracking does occur, reduce your voltage by increments of one half volt until you eliminate the problem. There are four major causes of slag inclusions, all of which can be prevented with proper welding techniques.
help with MIG sputtering
First, avoid incorrect weld bead placement, especially when making multiple passes on thick sections of metal, such as needed for the root passes of welds or wide v-groove openings. Be certain to provide sufficient space in the weld joint for additional passes, particularly on joints requiring multiple passes. To prevent worm tracking, use the manufacturer's recommended parameters for your given wire diameter and lower your voltage setting if necessary. Second, maintain the correct travel angle and travel speed.
In the flat, horizontal, and overhead positions your drag angle should be between 15 and 45 degrees. In the vertical up position, your drag angle should be between 5 and 15 degrees.
If you experience slag inclusions at these angles, you should increase your drag angle slightly. Maintain a steady travel speed; if you travel too slowly, the weld puddle will get ahead of the arc and create slag inclusions. Next, maintain proper weld heat input, as too low of welding heat input can also cause slag inclusions. If slag inclusions still occur, increase the voltage until the inclusions cease. Finally, be certain to clean thoroughly between weld passes, removing any slag with a chipping hammer, wire brush or grinding before beginning your next weld pass.
Tip Four: Prevent Undercutting and Lack of Fusion Like other weld defects, undercutting and lack of fusion can both affect the quality of your welds and preventing them can go far in reducing downtime and costs for rework. Undercutting occurs when a groove melts in the base metal next to the toe of the weld, but is not filled by the weld metal.You must claim this bet365 offer within 7 days of opening your account.
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