Title: Force analysis during spot finishing of titanium alloy using novel tool in magnetic field assisted finishing process
Authors: Anwesa Barman; Manas Das
Addresses: Department of Mechanical Engineering, Indian Institute of Technology, Guwahati, 781039, India ' Department of Mechanical Engineering, Indian Institute of Technology, Guwahati, 781039, India
Abstract: Magnetic field assisted finishing process is a nanofinishing process which uses magnetic field for precise control of finishing forces. Magnetorheological fluid mixed with diamond abrasive particles in base medium of glycerol, hydrofluoric acid, nitric acid, and deionised water is used as the polishing medium. The novel tool is a magnet fixture made of mu-metal which is used to hold the magnet during finishing. In the present experimental study, finishing at a spot on flat titanium alloy is carried out to analyse the forces involved in the finishing. Normal force is the main force responsible for the indentation by the abrasive particles on the workpiece surface. Tangential force helps in removing indented material. The measured normal force and tangential force during the spot finishing are 3.285 N and 0.43 N, respectively. The final surface roughness achieved after spot finishing is 10 nm from initial surface roughness of 200 nm. The percentage improvement in surface roughness is 95%.
Keywords: nanofinishing process; MR fluid; magnetic field assisted finishing; MFAF; finishing force.
International Journal of Precision Technology, 2019 Vol.8 No.2/3/4, pp.190 - 200
Received: 31 May 2018
Accepted: 01 Feb 2019
Published online: 09 Jul 2019 *