Here are some tricks about welding supplies and how to make the best buying choices. MIG Welding Increases Welding Speed: In addition to welding aluminum and other softer metals, MIG-welding works faster, provides cleaner welds, and handles many different types of metals. The downside is its complexity. MIG Welders need direct currents, a steady stream of inert gas, and precise control of their torches. The amount of heat generated from MIG welding provides the deep penetration required for a strong weld, while also melting the feed wire rapidly enough to maintain a higher welding speed than other techniques. Given the inert gas required for MIG welding, keep in mind that this technique cannot be conducted in windy areas. The Right Stick Electrode Increases Welding Speed: There are three kinds of electrodes used for stick welding: fast-fill, fill-freeze, and fast-follow. While each electrode has its advantages, the fast-fill electrodes melt quickly and allow welders to work faster.
Identify the types of welding projects and materials you will weld most of the time. Are you creating metal sculptures? Do you intend to restore an old muscle car in your garage? Does the motorcycle you bought years ago require some fabrication? Maybe you need to do basic repair on farm equipment. Taking the time up front to identify the projects that will occupy the biggest percentage of your welding activity will help you determine the specific thickness of metal you will likely weld most often — and ultimately help you select the most suitable welder. Time to get a bit more specific. Let’s take a look at what welding process you can use for each metal type. Keep in mind that many of these materials are also processed using varying combinations of two or more metals to reinforce strength and functionality.
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.
And another tip is use the old school type of collet body(not gas lens) and one size smaller cup than you would use for steel that still provides good shielding. A smaller old school (not gas lens) TIG cup confines the shielding gas envelope to the puddle so that arc energy is not wasted in the form of frosty cleaning action outside the weld. A lot of Old timers use the small cups, they just don’t know why. Pay attention next time you weld aluminum and use a small cup and then turn the shielding gas flow down to around 12-15 cfh with a #6 cup and see if things don’t quiet down a bit.
Best welding advices: how to become a more skilled welder and how to pick the best welding equipment. How do I choose what size Tig Welding Rod should I use for the job? For sheet metal up to 1/8” thick, don’t use a welding rod that is bigger than the thickness of metal you are welding…at least not much bigger. A good example…is using a 3/32 rod for welding .040 metal. That will just give you a fit. The amperage is low and the weld puddle needs to be small in order to prevent blowing a hole…and then when you dip the rod into the puddle, the rod is a big heat sink and sucks the heat right out of the puddle making it hard to maintain a consistent size bead. But Beginners should probably not be practicing on really thin metal. If you are a beginner you should be practicing on around 1/8 ” thick metal, and the bigger the rod, the easier it is to feed. For 1/8 ” metal, Use larger diameter rods (3/32” to 1/8”) So here is the rule….thin metal, use a thin rod Thick metal, use a thicker rod. This might seem like a no brainer, but I have answered a lot of questions like this about the rod melting before it gets to the puddle. If torch angle and arc length are right, its usually the rod size.
Keep in mind that heavy-duty MIG welding often produces a lot of heat, sparks and spatter, and requires a lower degree of dexterity than some other forms of welding. Therefore, using thick, stiff leather gloves that provide a higher level of protection is smart. Similarly, choose leather footwear that covers your entire foot and leaves as little room as possible for spatter to fall along your ankle line. High-top leather shoes and work boots often provide the best protection. Finally, always be sure you have adequate ventilation per OSHA recommendations and check material safety data sheets (MSDS) for each metal being welded and filler metal being used. Use a respirator whenever required by the MSDS.
The arc is shaped like a cone, with the tip at the electrode and the base on the metal being welded. The closer the electrode is held to the metal, the smaller the base of the cone — but as you pull the electrode farther away, the base (and puddle) gets larger. If the puddle gets too large, gravity will simply pull it away from the base metal, leaving a hole. This is why thin-gauge metals are especially challenging for beginners. Perhaps the most important skill needed for TIG welding is moving the torch in a controlled manner, with steady forward movement, while keeping the gap between the tip of the electrode and the base metal consistently small — usually in the range of 1/8 inch to 3/16 inch. It requires a lot of practice to precisely control the arc length, keeping it as short as you can without allowing the electrode to touch the base metal or filler rod. Source: https://www.weldingsuppliesdirect.co.uk/.