MAGNETO ABRASIVE FLOW MACHINING

SEMINAR BY

SANTOSH BELLIKATTIUSN : 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 throughor past the work piece surface

to be abraded.

Orbital Machines:

While finishing

In orbital MAFM, the work piece is precisely oscillated in two or three dimensions

Orbital MAFM concept is to provide transitional motion to the work piece

Before start of finishing

Orbital MAFM Process

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/kondratenko/library/article9.htm

• http://www.sciencedirect.com/science