Folding-shearing: Shrinking and stretching sheet metal with no thickness change

Allwood J. M., Cleaver C. J., Loukaides E. G., Music Ö., Nagy-Sochacki A.

CIRP Annals, vol.68, no.1, pp.285-288, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 1
  • Publication Date: 2019
  • Doi Number: 10.1016/j.cirp.2019.04.045
  • Journal Name: CIRP Annals
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.285-288
  • Keywords: Sheet metal, Bending, Shearing
  • TED University Affiliated: Yes


© 201950% of all sheet metal is scrapped, mainly by trimming following deep-drawing. To combat this a novel process inspired by the mechanics of spinning is proposed and its feasibility is tested with a novel experimental rig. A sheet is first folded along its long axis and then drawn through a die-set in a state of shear to reduce its width with no average reduction of thickness. The performance and limits of the process are evaluated with a novel experimental rig and new analytical and numerical simulations. The extension from this pre-cursor process to a more general forming process is discussed.