MAGNETO ABRASIVE FLOW MACHINING
SEMINAR BY
SANTOSH BELLIKATTI
USN : 2GI02ME024
BATCH NO: 12
INTRODUCTION
• What is Magneto Abrasive Flow Machining?
Magnetic abrasives are emerging as important finishing
methods for metals and ceramics.
• Extrude Hone Corporation, USA, originally developed the
AFM process in 1966.
• Modeling of surface generation and process monitoring of
AFM was conducted by Williams and Rajurkar during the late
1980s
PRINCIPLE
a) Off-state MR fluid particles
(b) Aligning in an applied magnetic field
TYPES OF MACHINES
One-way machines:
medium chamber adapted to
receive and extrude medium
unidirectionally across the
internal surfaces of a work
piece
Two-way machines:
The medium is extruded,
hydraulically or mechanically,
from the filled chamber to the
empty chamber via the
restricted passageway through
or past the work piece surface
to be abraded.
Orbital MAFM Process
Orbital Machines:
In orbital MAFM, the work
piece is precisely oscillated in
two or three dimensions
Before start of finishing
Orbital MAFM concept is to
provide transitional motion to
the work piece
While finishing
PROCESS PARAMETERS
1. Flow rate (volume) of the medium.
2. Magnetic flux density.
3. Number of cycles.
4. Extrusion pressure.
5. Viscosity of the medium.
6. Grain size and concentration of the abrasive.
7. Work piece material.
8. Flow volume of the medium.
ADVANTAGES
• A very high volume of internal deburring is possible.
• MAFM deburrs precision gears.
• MAFM polishes internal and external features of
various components.
• MAFM removes recast layer from components.
• Effective on all metallic materials.
• Controllability, repeatability and cost effectiveness.
• Less Time Consumption.
LIMITATIONS
• Abrasive materials tend to get embedded, if
the work material is ductile.
• Require closed environment.
• Require start up hole.
APPLICATIONS
• Automotives
• Medical implants
• Manufacturing industries
REFERENCES
• V.K. Jain - Advanced (Non-traditional)
Machining Processes (e-book)
• http://masters.donntu.edu.ua/2010/fimm/ko
ndratenko/library/article9.htm
• http://www.sciencedirect.com/science