This content is not included in your SAE MOBILUS subscription, or you are not logged in.
High Speed, Automatable Superfinishing of Rear-Axle Hypoid Gears
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2012 by SAE International in United States
Annotation ability available
The benefits gained by superfinishing rear-axle hypoid gearsets are now well documented. Friction, wear and operating temperature are significantly reduced. The main impediment to commercially implementing this process, however, is that it increases manufacturing cost in terms of process speed, work in process and labor. The cost of superfinishing can be significantly reduced by employing a newly developed and fully automatable drag finishing process.
The most primitive form of drag finishing occurred when Roman soldiers dragged their armor through sandy fields for obtaining a mirror-like appearance. Today's drag finisher, of course, is much more sophisticated. A circular turret is located above a circular bowl containing loose, ceramic media. Parts are attached to multiple rotating spindles on the turret, which in turn are immersed in the media in the bowl below, and are dragged through the media. This generates a high flow of media over the gearsets. By a judicious choice of media and a chemical accelerator, the hypoid gearsets can be superfinished in less than five minutes to an Ra of less than 0.15µm, while maintaining gear geometry. The turret speed, spindle speed and direction of rotation and depth in the media are controlled with a programmable logic controller. The angle of the spindle can also be adjusted. A novel fixture has been developed that adds quick change capability of gearsets (a matter of seconds), and facilitates automation.
CitationFrechette, M., Sroka, G., and Bell, M., "High Speed, Automatable Superfinishing of Rear-Axle Hypoid Gears," SAE Technical Paper 2012-01-0164, 2012, https://doi.org/10.4271/2012-01-0164.
- Proceedings of the ASME 2007 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2007 September 4 7 2007 Las Vegas, Nevada, USA DETC2007-34860
- Winkelmann, Lane Holland, Jerry Nanning, Russell REM Chemicals Inc. “Superfinishing Motor Vehicle Ring and Pinion Gears” AGMA 2004
- Hashimoto, F.F.H. Zhou, R.S. Howlett, K. U.S. Patent 5,503,481 1996 “Bearing Surfaces with Isotropic Finish” REM Chemicals, Inc. Southington, CT
- Michaud, Mark Winkelmann, Lane Snidle, Ray Alanou, Mark “EFFECT OF SUPERFINISHING ON SCUFFING RESISTANCE” ASME 2003 Design Engineering Technical Conference
- Sroka, Lane Winkelmann “Superfinishing Gears- The State of the Art” Gear Technology magazine Nov Dec 2003
- Chmielewski, David Walther Corp. “Is This the Mass-Finishing Answer You Have Been Looking For?” PF online May 1997
- Gillespie, LaRoughx “Mass Finishing Handbook” first 328 2006