Automated Polishing And Cleaning Of Aluminum Extrusion Dies
Bill Fehl, Extrude Hone Corporation
Track: DIE DESIGN AND TECHNOLOGY - Technology in Practice
ABSTRACT --- In manufacturing aluminum extrusion dies, laborious hand finishing of
bearing surfaces together with the associated costs, delay in delivery, lack of
uniformity, repeatability, and control can be eliminated by the proper combination of
machining technologies. These technologies are readily available. Profile bearing
surfaces are increasingly produced using electrical discharge machining; either by
using sinking methods, or more commonly, wire EDM. The resulting surface is,
however, of relatively low integrity and a second machining operationknown as
Abrasive Flow Machiningwill return the surface to its full integrity, thus providing a
bearing surface which is functionally superior and optically pleasing. In use, dies need
to be periodically re-polished in order to restore the original fine bearing surface finish
and remove pick-up. Abrasive Flow Machining will perform these tasks with better
uniformity and in a fraction of the time required for handwork.
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