A review on magnetically assisted abrasive finishing and their critical process parameters

Abstract

Magnetically assisted abrasive finishing (MAAF) processes are the precision material removal processes that have been applied to a large variety of materials from brittle to ductile and from magnetic to non magnetic. The MAAF process relies on a unique “smart fluid”, known as Magnetorheological (MR) fluid. MR fluids are suspensions of micron sized magnetizable particles such as carbonyl iron, dispersed in a non-magnetic carrier medium like silicone oil, mineral oil or water. The MAAF processes overcome the limitation of abrasive flow machining by deterministically control the abrading forces by applying magnetic field around the workpiece. MAAF process is divided into two parts; one is magnetorheological finishing (MRF) and another is magnetorheological abrasive flow finishing (MRAFF). The MRAFF process gives better results as compared to results of MRF because it has additional reciprocating motion of MR fluid. In this article the attempt has been made to review various technical papers related to MRF and MRAFF. The experimental setups, process parameters, MR fluid, modeling & optimization and applications are discussed in this paper. This review article will be useful to academicians, researchers and practitioners as it comprises significant knowledge pertaining to MAAF.

Machining the Surface of Orthopedic Stent Wire Using a Non-Toxic Abrasive Compound in a Magnetic Abrasive Finishing Process

“…achieve high surface fineness and dimensional accuracy in products with different shapes such as circular pipes, cylindrical bars, planes, and micro-scale diameter wire [9][10][11]. Owing to its major advantages, the MAF process has been applied, for example, in medical applications, automotive, aerospace, and nuclear industries, and in the hydrogen supply system [9,12].…”

“…Unlike the other conventional machining processes, the MAF process uses very little cutting force with the flexible magnetic abrasive compound, which can produce a high-quality, damage-free surface. The MAF process has been used to achieve high surface fineness and dimensional accuracy in products with different shapes such as circular pipes, cylindrical bars, planes, and micro-scale diameter wire [9][10][11]. Owing to its major advantages, the MAF process has been applied, for example, in medical applications, automotive, aerospace, and nuclear industries, and in the hydrogen supply system [9,12].…”

Study on influential parameters of hybrid AFM processes: a review

“…But in the MRF process when the conc. of abrasives was increased, MR chain becomes weak due to the increase in the distance between two CIP, hence change in roughness value and material removal was decreased [8,10]. The wt.% of processing oil in R-AFF should be kept optimum for proper mixing and bonding of abrasives and processing oil.…”

“…The finishing of a complicated turbine blade made of super-alloy and holes and slots in glass and semiconductor was difficult if conventional processes were used [4][5][6][7]. Also, when the roughness value required in micrometer/nanometer range, the cost of machining increases sharply [8][9][10][11][12]. To overcome these problems of conventional machining processes, researchers have developed advanced finishing processes.…”

Study on mechanism of improving efficiency of permanent-magnet small ball-end magnetorheological polishing by increasing magnetorheological fluid temperature

“…The polished surface quality and profile accuracy of these parts are required highly. Magnetorheological (MR) polishing method has the advantages of high machining accuracy, no tool wear and no subsurface damage, and the roughness of polished surface can reach nanoscale 1 , 2 or even angstrom dimension 3 . Thus, it is suitable for polishing these parts.…”