In the expansion of the aluminum industry, aluminum castings have played a very important role. Anyone who is into the industry of metal castings have got to be willing to be taught particular information of welding aluminum castings with less amperage. There is certainly few Tig welding inverters that can assist you to meet your objective of power saving why you try to weld your castings in aluminum. These inverters employ power as low as 115v only. These machines are first-class power sources but their output is limited to 200 amps only. At 200 amps, it’s not hot enough enabling you to weld with more comfort.
A different proven system to reduce amperage during welding is the preheating of the aluminum parts at a temperature of 200 degree. For preheating aluminum castings, you may employ either a furnace or an oxy-fuel torch. But if you won’t have these two tools in place, still you have options to lower your amperage. Now in such a case, you need a gas grill. You may spare a gas grill just for preheating of aluminum parts but not for cooking anything on it. When you are ready with your gas grill, utilize aluminum foil to wrap the part to be preheated. Then put it on the oven. Keep the flame at medium and allow the heat to conduct through the part. Using a small propane torch won’t be a bad idea to make the part hot enough by moving the torch over it.
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If you didn’t like the idea of using gas grill, here is another tip for you to reduce the amperage. When you try to Tig welding aluminum castings with less amperage, prefer using a 50-50 helium/argon mix as a substitute of straight argon. This mix does the magic, as helium provides more energy. Especially, for thick aluminum, employ of helium is generally recommended. Helium adds more voltage to aluminum arc and supply of extra current is not needed. For aluminum with a thickness less than ¼ inch, use of straight argon can be a sensible choice.
Still, there is one great tip for Tig welding aluminum castings with low amperage. Now, you can think using a small Tig cup. Sometimes it is also called as Tig welding nozzle. This is actually a ceramic tip that is fixed at the end of the Tig torch. This Tig cup allows release of less shielding gas and prevents the oxidation of the tungsten electrode. The idea is not to apply too much torch gas. The less amount of gas projected on the aluminum parts demands for less mount of amperage. Moreover, the degenerated arc energy adds to the gas shielding. Thus, welding parts get an extra amount of energy. In fact, allowing too much gas to flow will make it difficult to work with it.
Today, aluminum industry is a well-developed industry and hundreds of compositions of aluminum alloy castings are available keeping in mind their commercial usage. In most types of commercial casting processes, these recommendations for Tig welding aluminum castings will be greatly beneficial to reduce amperage. Visit shelmetcastings.com and find more proven tips about catings.
