Formability and Force Analysis of Steel Foils in Single Point Micro-Incremental Forming (SPMIF)

Thirumalai, Muthusamy and A.K., Jeevanantham and Ravuri, Kishore and Ananthanarayanan, Rajeshkannan (2018) Formability and Force Analysis of Steel Foils in Single Point Micro-Incremental Forming (SPMIF). Materials Today: Proceedings, 5 . pp. 12772-12781. ISSN 2214-7853

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Abstract

Single point incremental sheet forming (SPIF) is one of the latest near-net shape manufacturing technologies in which sheet metals are subjected to a step by step plastic local-deformation to form the final geometry. In this regard, many researchers have made an attempt to increase the flexibility and accuracy of the process by deforming the sheet at micro scales under the name ‘Single Point Micro Incremental Forming (SPMIF)’. In this paper, it is attempted to investigate the forming limits and forming forces in micro-features formed by SPMIF on stainless steel foils of 0.04 mm thick. A 3-axis CNC vertical milling machine was used to deform the foils with the hemispherical end tool tip diameters of 200 μm and 300 μm. The effect of rotational speed on the forming forces and forming limits of stainless steel foils has also been reported. Taguchi’s L18orthogonal array was used to analyze the effect of spindle speed, tool tip diameter and incremental step-down. It was found that forming forces decreases with the increase in spindle speed and the process was feasible enough to produce pyramids in micro-scale with higher forming limits than conventional forming.

Item Type:	Journal Article
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
Depositing User:	Rajeshkannan Ananthanarayanan
Date Deposited:	30 Aug 2018 02:09
Last Modified:	30 Aug 2018 02:09
URI:	https://repository.usp.ac.fj/id/eprint/10934

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