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![]() ![]() Variations from one tube order to the next also play a role in springback. If the component has bends in several planes, the weld seam should be oriented so it’s along the neutral axis of the most severe bend. ![]() It shouldn’t be under compression (on the intrados, or inside of the bend) or tension (on the extrados, or the outside of the bend). If the tube has all of the bends in the same plane, the best orientation for the weld seam is along the neutral axis. Changing the weld seam’s location from one bend to the next is a sure way to change the amount of springback from one tube to the next. If it’s welded tube, it has a weld seam somewhere on its circumference, and the weld seam’s properties are different from those of the parent material. After bending one tube to 180 you may find that the next tube might come out to 179 or 181 degrees. ![]()
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