Journal of Materials Processing Technology XXXXXXXXXX–381 Contents lists available at ScienceDirect Journal of Materials Processing Technology journal homepage: www.elsevier.com/locate/jmatprotec A novel sheet metal forming method—Millipede forming * Shichao Ding , Paul A. Meehan, William J.T. Daniel School of Mechanical and Mining Engineering, University of Queensland, 22 Staff House Rd, St. Lucia, Brisbane, Qld 4072, Australia article info abstract Article history: Millipede forming, a novel sheet metal forming method, has been proposed and developed recently to Received 29 April 2010 overcomefundamentallimitationsinconventionalrollforming.Forthisnewmethod,therearetwomain Received in revised form 9 September 2010 aspects: use of an optimal transitional surface and implementation of a method to feed the strip through Accepted 16 October 2010 the transition surface. Achieving the optimal transitional surface involves de?ning the change of surface shapebetweena?atstripanda?nalshapedproductconceptualisedtothestrip’smid-surface,regardless of the strip’s thickness. Keywords: In this paper, one method of implementing a transition surface, Millipede forming, is introduced. A Millipede forming prototype has been built to demonstrate the working principle and can be used to produce some simple Transitional surface pro?les, within a short forming length of 200mm. Roll forming © 2010 Elsevier B.V. All rights reserved. Redundant deformation Energy consumption Springback 1. Introduction length and experimentally validated it with tests of mild steel and aluminum.Bhattacharyya’sforminglengthshowsthatdeformation For mass production of long sheet products with a unique pro- length is independent of the span space of roll stands. Other col- ?le, conventional roll forming is highly ef?cient. Although roll leagues from The University of Auckland, Panton, Zhu XXXXXXXXXXalso forming has been developed for many years, the technology still systematically analysed parameters that...
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