Single Point Incremental Forming using a Dummy Sheet

Martin Skjødt, Beatriz Silva, Niels Bay, Paulo A.F. Martins, Torben Anker Lenau

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


A new version of single point incremental forming (SPIF) is presented. This version includes a dummy sheet on top of the work piece, thus forming two sheets instead of one. The dummy sheet, which is in contact with the rotating tool pin, is discarded after forming. The new set-up influences the process and furthermore offers a number of new possibilities for solving some of the problems appearing in SPIF. Investigations of the influence of dummy sheet on: formability, wear, surface quality and bulging of planar sides is done by forming to test shapes: a hyperboloid and a truncated pyramid. The possible influence of friction between the two sheets is furthermore investigated. The results show that the use of a dummy sheet reduces wear of the work piece to almost zero, but also causes a decrease in formability. Bulging of the planar sides of the pyramid is reduced and surface roughness is increased. Lowering of friction between the two sheets by lubrication only influences roughness. Suggestions for applications of this new technique are discussed, among those SPIF of tribologically difficult materials like titanium and soft aluminium.
Original languageEnglish
Title of host publicationProceed. 2nd ICNFT
Number of pages695
Place of PublicationBremen
PublisherBIAS Verlag
Publication date2007
ISBN (Print)978-3-933762-22-1
Publication statusPublished - 2007
Event2nd Int. Conf. on New Forming -
Duration: 1 Jan 2007 → …


Conference2nd Int. Conf. on New Forming
Period01/01/2007 → …

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