Title: Experimental investigations into cylindrical electro-chemical magnetic abrasive machining of AISI-420 magnetic stainless steel
Authors: K.B. Judal; Vinod Yadava
Addresses: Department of Mechanical Engineering, Motilal Nehru National Institute of Technology, Allahabad-211004, India; Department of Mechanical Engineering, Government Engineering College, Patan-384265 (Gujarat), India ' Department of Mechanical Engineering, Motilal Nehru National Institute of Technology, Allahabad-211004, India
Abstract: Cylindrical electro-chemical magnetic abrasive machining (C-EMAM) is an advanced abrasion-based hybrid machining process used for efficient finishing of cylindrical surfaces made of difficult-to-machine electrically conducting materials. In this work, experiments were performed on self-developed C-EMAM process setup to investigate the effects of electrolytic current, current to electromagnet, workpiece rotational speed and frequency of vibration on performance of the process during machining of magnetic stainless steel (AISI-420) using unbonded magnetic abrasives. The performance of the process is evaluated in terms of material removal and surface roughness. It is observed that for magnetic steel, magnetic abrasion has significant contribution in material removal, whereas electro-chemical dissolution helps rapid reduction in surface roughness due to abrasion passivation-synergism at peaks of surface profile. Workpiece speed and current to electromagnet have greater effect on synergy of material removal.
Keywords: hybrid machining; electro-chemical dissolution; unbonded magnetic abrasives; UMAs; magnetic abrasion; surface roughness; cylindrical electro-chemical MAM; magnetic abrasive machining; magnetic stainless steel; cylindrical surfaces; electrically conducting materials; electrolytic current; current to electromagnet; workpiece rotational speed; vibration frequency; material removal rate; MRR; surface quality.
International Journal of Abrasive Technology, 2012 Vol.5 No.4, pp.315 - 331
Received: 17 Sep 2012
Accepted: 18 Nov 2012
Published online: 04 Feb 2013 *