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Optimization of axisymmetric open-die micro-forging/extrusion processes: An upper bound approach
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.ORCID iD: 0000-0002-7527-719X
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-0101-0062
Materials Engineering, Monash University, Wellington Road, Clayton, Victoria, Australia.
2013 (English)In: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 71, 58-67 p.Article in journal (Refereed) Published
Abstract [en]

There is a trend towards component miniaturization and strong drive towards cost effective and sustainable metal forming techniques of miniaturized components. This paper presents an upper bound solution for the optimization of open-die forging/extrusion processes in the forming of micro-pins from a sheet metal. Using such an analytical modeling approach, the critical blank thickness, the resulting final part geometry, together with the required forming load were predicted based on the location of the neutral plane under the punch during the process. Based on the phenomenological findings of the process, the geometry size factor, x, was introduced explaining its relative importance to the model. Experimental results obtained from C11000 copper samples using a progressive microforming process was found to agree well with the results predicted by the model. The results were also validated with other results reported before from a similar process.

Place, publisher, year, edition, pages
2013. Vol. 71, 58-67 p.
Keyword [en]
micro forming, modelling, upper bound analysis, copper
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hj:diva-21139DOI: 10.1016/j.ijmecsci.2013.03.010ISI: 000319547800006Scopus ID: 2-s2.0-84877582218Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-21139DiVA: diva2:619891
Available from: 2013-05-07 Created: 2013-05-07 Last updated: 2016-10-28Bibliographically approved

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CiteExportLink to record
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