Patent ID: 9550272
Date: 2017-01-24
CPC Classifications: B23Q,B24B,B25B

Claim:
1. A method for finishing a metal workpiece during a media based finishing operation carried out in a drag-finishing machine comprising a receptacle for containing a quantity of finishing media and having a drive arrangement for inducing relative motion between the workpiece and the media, the method comprising: providing a rotary element with a plurality of arms having first and second ends, wherein the arms extend from the rotary element from a first end at a fixed, non-perpendicular angle, wherein a magnetic fixture is retained at the second end, wherein the magnetic fixture comprises a body having a seat with a profile for locating the workpiece and a permanent magnet for retaining the workpiece in contact with the body, and wherein the magnet is substantially embedded within the body to protect the magnet from exposure to the media; retaining the metal workpiece with the magnetic fixture; and finishing the metal workpiece retained by the magnetic fixture in the media based finishing operation by driving the magnetic fixture through the media such that the workpiece is driven through the media ahead of the magnetic fixture ensures that the media exerts a force on the workpiece tending to press it against the seat of the magnetic fixture.