Thin Parts Stick Together
Q. We make small, arched, spring steel pieces that are 2 × ¼ inches from 0.022-inch stock. The arch height is 0.22 to 0.24 inch. We debur the edges in a three-foot bowl vibrator using 3/8-inch angle cut cylinders. The deburring cycle is three hours, and we remove the parts using a handheld magnet; the parts are degaussed prior to inspection. The process is acceptable, but the problem is that the parts stack together in the vibrator, and about 15 percent of them have to be reprocessed. We add a grit to help to break up the stacks. Before we were adding the grit, the rework rate was about 30 percent. What changes can we make to improve this operation? P.J.
This paper is a peer-reviewed and edited version of a presentation delivered at NASF SUR/FIN 2012 in Las Vegas, Nev., on June 12, 2012.
Choice of equipment, media and compounds has a major impact on your finishing applications.
When choosing vibratory media, understand the size, shape, starting roughness condition and metallurgical structure of the part.