A few advices about welding equipment, MIG and TIG welders, plasma cutters. TIG Welding / Gas Tungsten Arc Welding (GTAW) — TIG welding is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually argon) and a filler metal, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy that is conducted across the arc through a column of highly ionized gas and metal vapors known as plasma. TIG welding is most commonly used to weld thin sections of alloy steel, stainless steel and nonferrous metals such as aluminum, magnesium and copper alloys. The process grants the operator greater control over the weld than other welding processes, allowing for strong, high-quality welds. TIG welding is comparatively more complex and difficult to master than other processes and is significantly slower.
Welding equipment tricks: how to become a more skilled welder and how to select the top welding equipment. 2% thoriated tungsten electrodes are mildly radioactive: Word on the street is that 2% thoriated tungsten electrodes are mildly radioactive. They say deer meat is too. No one gets out alive. Good news though…and it’s not just that I saved a bundle on my car insurance by switching to GEICO.. I have learned through testing a bunch of arc starts and by welding on all different metals that 2% lanthanated electrodes are about as good as the 2% thoriated. I even like the lanthanated a little better for some applications. So if you are scared of thoriated tungsten but you are even more scared of crappy electrodes that don’t work as well, use 2% lanthanated…they are colored blue. One word to the wise here. The blue ones are not brittle like 2% thoriated electrodes. And they splinter if you try to break them or snip with dykes. You have to cut or score with a grinder in order to cut to size or cut off a bib blob of metal you don’t want to sand off.
Look for ways to create more efficiencies in the welding process. This includes examining such things as wire diameter, wire feed speed, voltage, travel speed, gas type, transfer mode, etc. For instance, if the shop is currently welding with a short arc process and a 75/25 blend of shielding gas, it may be more effective to switch to a different gas and a spray mode of transfer. Or, a change in process may be warranted based on the condition of the part. If there is oxide on the part, it may be easier to change to a process that will overcome contamination problems rather than try to clean each part before welding. Your welding supplier should be up to date on the latest technology and be able to advise you on new processes, machinery and consumables that can optimize welding at the shop. In some cases, it may be better to double bevel a joint to prepare it for welding rather than single bevel it. It is recommended to double bevel any material that is more than 3/4″ in thickness. Just this simple change in procedure can save quite a bit in weld metal. On a 3/4″ thick piece, a double bevel will use 1.45 lbs. per foot of weld metal while a single bevel will use 1.95 lbs. per foot. Looking for the best TIG Welders? We recommend Welding Supplies Direct & associated company TWS Direct Ltd is an online distributor of a wide variety of welding supplies, welding equipment and welding machine. We supply plasma cutters, MIG, TIG, ARC welding machines and support consumables to the UK, Europe and North America.
Don’t use too much torch gas when welding aluminum on A/C. Don’t use too much torch gas when welding aluminum on A/C. Aluminum takes a lot of amperage to weld. Even though the melting temperature of aluminum is less than half that for steel, it takes about twice as much amperage to weld. Why? Because aluminum conducts heat away from the weld puddle faster than you can put it in. this brings me to an important point. Do not use more argon than necessary on your torch gas. If you do, it will be like blowing cool air on something you are trying to heat up with a torch. All that argon blowing on the part makes for a loud erratic arc because the arc force is so great. Have you ever lit up on a thick aluminum casting and listened to how loud the arc is? I bet your torch gas was up around 20 like the books recommend. That’s too much for aluminum (unless you are using an argon helium mix).
The welding setup, welder settings, and electrode selection will impact how fast welders can work. Industrial welders invest time in planning the size and shape of their welding areas, how parts are laid out, and how they supply their shielding gas. Testing settings or an electrode on a piece of scrap metal, especially for a beginners, will save time in the long run. Learn more about setting up an efficient shop here. Welding Downhill Increases Welding Speed: While welding downhill is a faster way to weld, it’s not as strong as welding uphill. On most projects it’s not worth sacrificing strength and durability for the sake of welding speed. However, if the metal is thin enough, then welding downhill won’t make the weld weaker and may even be the correct technique for the job. Learn about uphill and downhill welding and see these diagrams of vertical and downhill welding.
Following some simple tips can help you take your MIG welding operation to the next level and ensure you are as safe, efficient and professional as any other shop. Welding helmets, gloves, close-toed shoes and clothes that fully cover exposed skin are essential. Make sure you wear flame-resistant natural fibers such as denim and leather, and avoid synthetic materials that will melt when struck by spatter, potentially causing burns. Also, avoid wearing pants with cuffs or shirts with pockets, as these can catch sparks and lead to injuries.
All welding requires the application of heat, which melts the metal being welded. With the TIG process, the heat comes from an electric arc that streams between the electrode in a hand-held torch and the metal being welded. The arc and molten metal are shielded by an inert gas, which protects the electrode and base metal from oxidizing. Filler rod is usually added to the puddle of molten metal as the weld progresses. The essence of making a good weld is heat control, which is governed by how you modulate the arc as it streams from the torch. Let’s look at this in detail. Source: https://www.weldingsuppliesdirect.co.uk/.