The influence of part asymmetry on the achievable forming height in multi-pass spinning

Iacopo Russo, Christopher Cleaver, Julian Allwood, Evripides Loukaides

Research output: Contribution to journalArticlepeer-review

11 Citations (SciVal)


Metal spinning is an incremental forming technique commonly employed in the production of hollow axisymmetric components. In recent years, asymmetric spinning processes have been developed to expand the range of component geometries achievable by the technique. However, most of these processes have employed a solid mandrel to set the target shape and provide internal support to the workpiece, thus requiring new tooling to be manufactured for every new part. Moreover, no studies have been performed on the link between the geometry of the target part and the achievable forming height. In this paper, the range of curvature in the target part's planform is used to quantify its degree of asymmetry, and the influence of this parameter on the formability of spun parts is investigated in a series of experimental trials. The hypothesis that the range of planform curvature predicts the likelihood of workpiece failure is tested. Methods to design the multi-pass toolpaths and the blanks required to spin both axisymmetric and asymmetric components without a mandrel are developed. The results show that increasing the degree of asymmetry of the target part only weakly influences the achievable forming height. This finding points to the potential of the technique to produce multiple geometries flexibly and to reduce the costs of prototyping and testing new sheet metal parts considerably.
Original languageEnglish
Article number116350
Pages (from-to)1-16
Number of pages16
JournalJournal of Materials Processing Technology
Early online date31 Jul 2019
Publication statusPublished - 1 Jan 2020


  • Asymmetric shape
  • Flexible manufacturing
  • Forming height
  • Mandrel-free
  • Metal spinning

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'The influence of part asymmetry on the achievable forming height in multi-pass spinning'. Together they form a unique fingerprint.

Cite this