The deformation in the form of wrinkle that occurs when the material exceeds its elastic limit and sets in the curve of the bend die cavity immediately behind the line of tangency at the end of the bending process. In rotary-draw bending, the terminal hump is eliminated by use of a wiper die.
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.