But voltage transformers can also be constructed for connection to not only one single phase, but for two-phases, three-phases, six-phases and even elaborate combinations up to 24-phases for some DC rectification transformers. Thus far we have looked at the construction and operation of the single-phase, two winding voltage transformer which can be used increase or decrease its secondary voltage with respect to the primary supply voltage. Three-phase voltages (and currents) are raised or lowered by means of three phase transformers as the three phase transformer can have its windings connected in various ways. There Is No “Try.A three-phase electrical system in used to generate and transmit electric power over long distances for use by offices and industry. Welding Efficiency Programs: Do or Do Not.Looking for more welding-related insights? Try these other Airgas Thinks posts: Put conventional wisdom to the test and see how much more stable and easy to use these filler materials can be. If you consistently weld thinner material, you may also want to consider trying some lower energy shielding gases like 95% argon/5% O 2. Try your “thin” base metal with some “big” wire. Yes, it goes against commonly accepted logic, but it’s worth a shot. Wouldn’t it make sense to use a single wire that can effectively develop a quality weld on all of these materials? You could eliminate operations or wire changes-or even reduce capital costs-by purchasing simpler welding machines that only need to run one size of wire. Many fabrication operations have multiple instances of all possible combinations of thinner and thicker base metals. If all that isn’t enough, there’s one more thing to keep in mind. Now the job takes 30% longer and uses 30% more gas and electricity. This represents a 30% reduction in productivity. 035” wire, we will only be depositing 4.1 pounds per hour of weld metal. Then, however, we run into another problem. Of course, we can always lower the current density to match that of larger wires by reducing wire feed speed. This results in massive repair and rework costs. When we have a higher current density, and we encounter a gap while welding, the higher density tends to blow through the joint and over-penetrate. However, reality tells us that the joints don’t always fit right, and gaps are the rule, rather than the exception. If the joint fits properly, and there are no gaps, it isn’t a big deal. What is the big deal with current density? 052” wire? We end up with 140 IPM wire speed, 24 IPM travel speed and a current density of 89,500 amps per square inch. 045 wire is about 120,000 amps per square inch, and the. All seems well, until we look at current density. To make the same weld (at same travel speed, same deposition), we need 325 IPM of MIG wire when using. 045” wire at 200 inches per minute (IPM), which will deposit about 5.4 pounds per hour of weld at about 24 IPM of travel speed. Let’s assume we want a ~1/8 fillet weld on a tee joint of 1/8” base metal. Certainly, these may seem like oversimplifications, but there’s sound reasoning behind it. 045” can be considered small, and all others as big. And when it comes to wire diameter, generally speaking, anything less than. One way to break up metal thicknesses is as follows: Thin is everything 1/8” and below everything else is thick. But really, shouldn’t we first define what is thick or thin, big or small? There is a widely accepted point of view that “thin” metal should be welded with “small” diameter wire. One of the many things to choose in MIG welding is the size of MIG wire you want to use. Read his detailed breakdown below to find out why you want to consider using thicker wire, even when welding thinner materials. Bigger is almost always better-at least when you’re talking about MIG wire diameter-according to Fred Schweighardt, Advanced Fabrication Project Leader at Airgas.
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