Thin-walled tube bending has common applications in the automobile and aerospace industries. The rotary-draw-bending method is a complex physical process with multi-factor interactive effects and is one of the advanced tube forming processes with high efficiency, high forming precision, low consumption and good flexibility for bending angle changes. However, it may cause a wrinkling phenomenon,...

This paper presents the post-forming limits of polyamide 6 carbon (CF/PA6) thermoplastic tubes to facilitate design and process optimisation bent tubular CF/PA6 part manufacturing. Straight can be post-formed using rotary draw bending at elevated temperature achieve desired curvatures. Forming are predicted based on their winding angles, tube geometry, radius, presented as relation between angl...

Abstract Rotary draw bending is a commonly used metal forming technique for profile bending. Due to the elastic recovery of material, springback compensation control bent product quality one critical manufacturing issues. The realized bend angle has be measured before removing from machine, and process can follow an iterative approach until satisfied. However, this trial-and-error costly batch ...

We report a novel rotary piezoelectric motor using bending transducers in this work. Three transducers are used to drive a disk-shaped rotor together by the elliptical movements of their driving tips; these motions are produced by the hybrid of two first bending vibration modes. The proposed piezoelectric transducer has a simple structure as it only contains an aluminum alloy beam and four piec...