However, in the case of laser welding, there is no amperage at all since there is no electrical current flow within the workpiece. Micro TIG welding and laser beam welding have similar applications where in the case of TIG welding the amperage is quite low. Welding application has a direct correlation with the amperage used in a weld. In this section, we will discuss the welding application, the base material, and specifically how this applies to the amperage selection on a welding machine. Keep Reading Welding Application and Base Material.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.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |