Centrifugal isotropic micro finishing bearing surfaces
•
1 like•166 views
Centrifugal Iso-Finishing for low micro-inch surface finish values
Recommended
More Related Content
Similar to Centrifugal isotropic micro finishing bearing surfaces
Similar to Centrifugal isotropic micro finishing bearing surfaces (20)
More from Dave Davidson
More from Dave Davidson (20)
Recently uploaded
Recently uploaded (20)
Centrifugal isotropic micro finishing bearing surfaces
- 1. Developing Isotropic Micro- Finishes with Centrifugal Iso-Finishing CONTACT: Dave Davidson | dryfinish@gmail.com | SME Technical Community Advisor | https://about.me/dave.davidson
- 2. Top: Typical Surface Developed from Centrifugal Iso-Finishing. 1. Isotropic – no machining or grinding lines. 2. Neutral or negative skew (Rsk). Asperities and peaks have been planed off, more useful load bearing surface. Bottom: Typical Gaussian Surface. 1. Grinding or Machined Super-Finishing operation produces positive skew with peaks and asperities predominating. 2. Low micro-inch Ra profilometer readings don’t tell the whole story. This surface is much less efficient as a bearing surface. AFTER BEFORE Centrifugal Iso-Finishing Bearing Surfaces. Before and after ISO-Finish processing Graphic by Jack Clark, Surface Analytics LLC
- 3. Electron Microscopy CBF or Centrifugal Iso- Finishing is the only method that produced a surface with a random scratch pattern. The other methods although nominally low micro-inch surfaces still are characterized by parallel ridges and grooves that minimizes the actual amount of the surface carrying the bearing load Graphic courtesy of Jack Clark, Surface Analytics, LLC Centrifugal Iso-Finishing Machine Isotropic surface, ridges and grooves are blended in
- 4. Visual Comparison The random and non-linear character of the surface finish pattern can be seen in these comparative photos that correlates with the electron microscopy of the previous slide. The ridge and groove characteristic of the non- isotropic surfaces can be seen by the naked eye as well. Part graphics courtesy of Jack Clark, Surface Analytics, LLC Centrifugal Iso-Finishing Machine Isotropic surface, ridges and groves are blended in
- 5. Before and After Comparison of Rollers. (1) Visual (2) 2-D View from electron microscopy (3) 3-D View from Optical Interferometry. Graphics courtesy of Jack Clark, Surface Analytics, LLC. Isotropic Surfaces developed with post-processing using Centrifugal Iso-Finishing Methods. Before Centrifugal Finishing - as ground surfaces. After Centrifugal Finishing, Isotropic surfaces with neutral to negatively skewed ground surfaces.
- 7. Other Low Micro-Inch Finishing Applications TOP: Turbine blade foil surfaces also require low micro-inch surface values. In the electron photo micrographs shown here the surfaces were reduced to 5 micro-inch Ra surface finish values by using a multiple sequence process with Centrifugal Iso-Finishing. Equipment BOTTOM: Electron Micro- Photographs show surface effects of a Centrifugal Iso- Finishing Process on ground steel surfaces. Note the change in the surface pattern orientation.
- 11. Free Sample Part Processing and Process Engineering • To make arrangements CONTACT: Dave Davidson • https://about.me/dave.davidson • Deburring/Finishing Technologist • SME Technical Community Advisor • dryfinish@gmail.com • 509.230.6821 • http://dryfinish.wordpress.com • http://partsfinished.wordpress.com • ________________________ • Free Sample Processing • Contract Deburring and Finishing Services • High Energy Finishing Equipment and Process Development