The increase in the length of the centerline radius that occurs as a result of springback. Radial growth increases with rigidity of the material and “D” of bend. If specification of the centerline radius is critical, radial growth is offset by decreasing the radius of the bend form.
FREE Tube-Bending Guide Download:
A complete guide to the principles of the 4-Step set-up for tube-bending tools
This is a printable handbook showing how to implement in four standardized steps the “forward mandrel” set-up for rotary-draw tube-bending machines and establish process control over the so-called black art. The procedure is based upon the guiding principle that the tools make the bend and takes advantage of the inserted design of modern mandrel tooling.