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Particularly thin-walled and open profile shapes are prone to bending failures as buckling, cracking, formation of wrinkles and cross sectional deformations. In consequence, conventional bending procedures are of limited use for the manufacture of these profiles. FlexBend is a new apparatus for transverse-force free bending of tubes or bar material with an unique system for the stabilization of the cross section against deformation. With FlexBend the profile is completely supported by flexible tool shapes during the entire forming process, avoiding the twisting of asymmetrically loaded profiles and supporting the cross section actively.
Keywords: bending, tubes, profiles, transverse-force free, building of wrinkles, tool
With FlexBend metals can be bent into complex shapes and variable cross-sections. FlexBend is also especially suitable for the manufacture of lightweight design structures consisting of fiber-reinforced plastics which are normally formed in molten state.
- Transverse-force free
- No cross section deformation
- No buckling or cracking
- No formation of wrinkles
- Suitable for metals and plastics
- One tool for all profiles
- One tool for all materials
A German patent application for this invention has been filed at the end of 2016. A first prototype and experimental data on the invention are available. On behalf of the TU Dortmund, PROvendis is seeking a licensee for the new technology.
C. Löbbe und G. Grzancic: „FlexBend – Entwicklung einer Technologie zum querkraftfreien Profilbiegen durch flexible Werkzeugformen, 6. Dortmunder Kolloquium zum Rohr und Profilbiegen, 02. - 03.11.2016.
Institute of Forming Technology and Lightweight Components (IUL), Activity Report 2016, TU Dortmund, 30.03.2017, hdl.handle.net/2003/35908.
Dr. Joachim Kaiser
+49.208 94105-23 also TU Dortmund: +49.231 7556421