20-12-2012, 06:52 PM
Abrasive Flow Machining
Abrasive Flow Machining.pdf (Size: 754.86 KB / Downloads: 132)
What is AFM ?
Developed method in 1960s, by Extrude Hone Corporation
• AFM can
Polish and deburr parts internally
Through holes
Intersecting holes
Calibrate fuel injection nozzles to a specific flow rate
A method to radius difficult to reach surfaces like intricate
geometries
Produce surface finish (Ra) as good as 0,05 μm deburr holes as
small as 0,2 mm radius edges from 0,025 mm to 1,5 mm
Widely used finishing process to finish complicated shapes and
profiles
Key Components of AFM Process
Machine :One –way AFM, Two-way AFM,
Orbital AFM
Tooling: Workpiece - Drill bit - Fixture
plate - Fixture - Piston - Cylinder
Abrasive medium: The medium that is
needed to be polished, deburred or finished.
Properties of AFM
Deburring , radiusing, and polishing are performed
simultaneously in a single operation
AFM can produce true round radii even on
complex edges
Reduces surface roughness by 75 to 90 % on cast
and machined surfaces
AFM can process dozens of holes or multiple
passages parts simultaneously with uniform results
One-Way AFM
One-way flow AFM processing pushes
abrasive media through the work piece in
only one direction, allowing the media to
exit freely from the part.