Bending Basics: The hows and whys of springback and ...
Jul 09, 2014 · Figure 3 Coining, bottom bending, and air forming affect stressstrain properties differently. The curved line in the air forming zone shows how springback changes at different bend angles. In bottoming and coining, bending methods that usually produce 90degree bend angles, the line curves to the right of the vertical axis, showing how the metal springs forward to conform to the die angle.
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