Open Access
Review
Table 2
Comparison of different advanced nano-finishing techniques used for freeform surfaces.
| Characteristics | AFM | MAF | MRFF | MRAFF | R-MRAFF | Advanced R-MRAFF |
|---|---|---|---|---|---|---|
| Base medium and abrasive | Polymer as a viscoelastic base medium mixed with fine abrasives | non-magnetic abrasive particles and ferromagnetic particles and additives | Water based or Oil based medium mixed with cerium oxide abrasives | Mineral oil and grease as viscoplastic medium with CIPs and different types of abrasives depending upon requirement | Same as in MRAFF | Same as in MRAFF |
| Workpiece fixture | Cylindrical | Flat, holding devices depending on workpiece | Workpiece is fixed by an device and pendulum motion is given to workpiece | Cylindrical | Cylindrical | Negative replica of workpiece |
| Working principle | To and fro flow of abrasive laden viscoelastic medium through the restricted passage | Relative motion of medium (FMAB) with workpiece | To and pro magnetically stiffened MR polishing fluid in the vicinity of workpiece surface | To and fro extrusion of magnetically stiffened MR polishing fluid over workpiece surface | Rotation as well as to and fro extrusion of magnetically stiffened MR polishing fluid over workpiece surface | Rotation as well as to and fro extrusion of magnetically stiffened MR polishing fluid over workpiece surface through uniform channel |
| Mechanism of material removal | Indentation & shearing of material in the form of microchips | Indentation and removal of material due to rotation of brush | Shearing and material removal in the form of microchips | Shearing and material removal in the form of microchips | Shearing and material removal in the form of microchips | Shearing and material removal in the form of microchips |
| Minimum surface roughness | 46.6 nm Sarakar and Jain [Sarkar and Jain] | 36.5 nm [Basera and Jain] | 28 nm [Sidpara and Jain] | 36 nm [Kumar and Jain] | 26 nm [Nagdeve et al.] | |
| Applications | Small holes in micro-range, internal, and external 3D complex shaped surfaces | Flat, cylindrical, helical geometry, internal and external surfaces of cylindrical geometry | Flat, spherical, concave, convex and aspherical external surfaces. Brittle component etc. | Non-magnetic internal closed surfaces and external surfaces irrespective of material type | Internal and external surface of any complex geometrical shapes of non-magnetic material irrespective of hardness | Internal and external surface of any complex geometrical shapes of non-magnetic material irrespective of hardness |
| Limitations | Not deterministic | Deterministic | Deterministic | Deterministic | Deterministic | Deterministic |
| Challenges | To control the medium properties during experiments | Finishing of complex features in minimum time | Reducing finishing time | 3-D CFD simulation of MR polishing fluid | Use of Magnetic replica of freeform surface to generate the uniform magnetic fixture | Use of Magnetic replica of freeform surface to generate the uniform magnetic fixture |
| Finishing of complex features | Reducing finishing time | 3-D CFD simulation of MR polishing fluid | 3-D CFD simulation of MR polishing fluid | |||
| To archive uniform surface finish | Reducing finishing time | Reducing finishing time | ||||
| To archive uniform surface finish | To achieve uniform surface finish |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.