3D profile bending with five controlled degrees of freedom

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dc.contributor.advisorTekkaya, A. Erman
dc.contributor.authorStaupendahl, Daniel
dc.contributor.refereeEngel, Bernd
dc.contributor.refereeBickendorf, Jobst
dc.date.accepted2020-12-04
dc.date.accessioned2021-06-28T05:42:54Z
dc.date.available2021-06-28T05:42:54Z
dc.date.issued2021
dc.description.abstractIn the recent decades, several processes for kinematic bending of tubes and profiles to three-dimensional contours have been developed. Although these processes offer the potential to cope with current demands for natural aesthetic design and high flexibility, they are not yet widely used in the industry. One reason has been, until now, the lack of fundamental knowledge about the forming process itself – specifically the forces and torques acting on the profile during 3D bending and the resulting stresses and strains in the cross-section. In order to generate a comprehensive understanding of the mechanics of 3D bending, first, the geometrical characteristics of 3D-shaped profiles are analyzed. Subsequently, the controlled degrees of freedom (cDOFs) process kinematics need in order to produce 3D shapes are derived. This groundwork is used to set up a 5-cDOF profile bending process with integrated force and torque sensors. Additionally, a new kind of contact-based contour measurement device is developed that allows time-efficient analyses of 3D profile shapes. A curved elastic model is created, which is able to accurately model in-plane springback and the interaction of torque and bending force components. During the analysis of the plastic profile behavior, equations are set up that describe the reciprocal effects of axial and shear stress and are used to calculate the bending force and torque acting on a profile during 3D bending. The geometric relation of profile shape and bending kinematics is finally used together with the elastic and plastic analyses to set up a comprehensive process model, which can accurately simulate the profile behavior during 3D-profile bending and can be used to generate spring-back compensated NC-data for bending processes with 3-6 cDOFs.en
dc.identifier.urihttp://hdl.handle.net/2003/40280
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-22153
dc.language.isoende
dc.relation.ispartofseriesDortmunder Umformtechnik;113
dc.subject3D-Biegende
dc.subjectProfilbiegende
dc.subjectBiegende
dc.subjectTorsionde
dc.subjectSpannungsüberlagerungde
dc.subjectProzessmodellde
dc.subjectKonturmessungde
dc.subject3D bendingen
dc.subjectProfile bendingen
dc.subjectBendingen
dc.subjectTorsionen
dc.subjectTwistingen
dc.subjectStress superpositionen
dc.subjectProcess modelen
dc.subjectContour measurementen
dc.subject.ddc620
dc.subject.ddc670
dc.subject.rswkRohrde
dc.subject.rswkProfil <Bauelement>de
dc.subject.rswkFreies Biegende
dc.subject.rswkDreidimensionale geometrische Modellierungde
dc.subject.rswkFreiheitsgradde
dc.subject.rswkMechanische Spannungde
dc.subject.rswkDehnungde
dc.subject.rswkRückfederungde
dc.subject.rswkDreidimensionale Bearbeitungde
dc.title3D profile bending with five controlled degrees of freedomen
dc.typeTextde
dc.type.publicationtypedoctoralThesisde
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationStaupendahl, Daniel: 3D profile bending with five controlled degrees of freedom. Düren: Shaker, 2021. (Dortmunder Umformtechnik ; 113) Zugl.: Dortmund, Techn. Univ., Diss., 2020de
eldorado.secondarypublication.primaryidentifierISBN 978-3-8440-8006-3de

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