Experimental and numerical investigation on micro deep drawing process of stainless steel 304 foil using flexible tools

Irthiea, I., Green, G., Hashim, S. and Kriama, A. (2014) Experimental and numerical investigation on micro deep drawing process of stainless steel 304 foil using flexible tools. International Journal of Machine Tools and Manufacture, 76, pp. 21-33. (doi: 10.1016/j.ijmachtools.2013.09.006)

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Abstract

Flexible forming technology provides significant application potential in various areas of manufacturing, particularly at a miniaturized level. Simplicity, versatility of process and feasibility of prototyping makes forming techniques by using flexible tools suitable for micro sheet metal forming. This paper reports the results of FE simulation and experimental research on micro deep drawing processes of stainless steel 304 sheets utilising a flexible die. The study presents a novel technique in which an initial gap (positive or negative) is adopted between an adjustment ring and a blank holder employed in the developed forming system. The blank holder is moveable part and supported by a particular spring that provides the required holding force. The forming parameters (anisotropy of SS 304 material, initial gap, friction conditions at various contact interfaces and initial sheet thickness) related with the forming process are in details investigated. The FE models are built using the commercial code Abaqus/Standard. The numerical predictions reveal the capability of the proposed technique on producing micro metallic cups with high quality and large aspect ratio. To verify these results, number of micro deep drawing experiments is conducted using a special set up developed for this purpose. As providing a fundamental understanding is required for the commercial development of this novel forming technique, hence the optimization of the initial gap in accordance with each sheet thickness, thickness distribution and punch force/stroke relationship are detected.

Item Type:Articles
Additional Information:NOTICE: this is the author’s version of a work that was accepted for publication in the International Journal of Machine Tools and Manufacture. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the International Journal of Machine Tools and Manufacture 76:21-33 January 2014 DOI: 10.1016/j.ijmachtools.2013.09.006
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hashim, Dr Safa and Green, Dr Graham
Authors: Irthiea, I., Green, G., Hashim, S., and Kriama, A.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:International Journal of Machine Tools and Manufacture
ISSN:0890-6955
ISSN (Online):1879-2170
Copyright Holders:Copyright © 2013 Elsevier Ltd.
First Published:First published in International Journal of Machine Tools and Manufacture 76:21-33
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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