![]() ![]() Welding can be done with a plain square type of edge preparation, as shown in figure 1. When the base metal thickness varies between 1/32 inch to 3/16 inch (0.8 mm to 4.8 mm), no edge preparation is generally necessary. What Groove-Design Is Good For What Thickness? The surface should be free from dust, oxides, oil, grease, or any other contaminants. Before commencing the welding, the welder must ensure that the surface of both parts is clean. During fit-up of plates, a pre-setting of the plates can be done to off-set the welding distortion that would occur as a result of welding.Ī good fit-up contributes to the final quality of the weld. ![]() This means that the two parts should be aligned with a uniform root gap throughout the weld length, and the assembly should be tack welded, so that it remains in place during welding. The edges shown in the above figure 2 above can be prepared using several techniques, such as flame cutting, shearing, flame grooving, machining, chipping, or carbon arc air cutting or gouging.īefore welding, a fit up needs to be made. Different groove designs are suited for different thicknesses. This edge preparation can be done in several designs, such as U-groove, V-groove, J-groove, and so on. As can be seen, as the thickness increases, beveling of the two edges becomes necessary to obtain a good weld. The following figure shows butt joints in higher thicknesses. ![]() Such low thickness base metals can be joined without any edge preparation. As can be seen, there is no beveling of the two parts in these thicknesses. ![]() The following figure shows plain square butt joints of various thicknesses. Butt joint is the most commonly used in the industry among all joint types. In welding, butt joints are used to join the edges of two plates or surfaces located in approximately the same plane. ![]()
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