Title: Constant work gap perpetuation in ball end magnetorheological finishing process

Authors: Faiz Iqbal; Zafar Alam; Dilshad Ahmad Khan; Sunil Jha

Addresses: Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India ' Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India ' Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India ' Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

Abstract: Ball end magnetorheological finishing (BEMRF) is an advanced finishing method employed for super finishing of flat, curved, intricate and complex surfaces. The surface finish achieved in BEMRF process is governed by machining parameters and fluid parameters. A main contributor towards super finishing by BEMRF process is the work gap. A constant work gap ensures a uniform finishing operation throughout the entire surface; however, there are many cases wherein the work gap between tool tip and workpiece varies over the surface due to geometric form deviations induced by preceding manufacturing process or linear positioner having a tilt error. This paper describes a method to keep a constant work gap for finishing in BEMRF process. A confocal sensor is used to scan the surface in order to detect any height deviations that prevent a constant work gap. Experimental results show a considerable improvement in the surface quality while finishing with perpetuated work gap.

Keywords: work gap; perpetuation; nano finishing; non-contact measurement; confocal sensor; ball end; BEMRF; automated finishing; surface roughness; surface metrology.

DOI: 10.1504/IJPTECH.2019.100943

International Journal of Precision Technology, 2019 Vol.8 No.2/3/4, pp.397 - 410

Received: 22 May 2018
Accepted: 29 Jan 2019
Published online: 19 Jul 2019 *

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