Analysis of critical process parameters of ductile mode grinding of brittle materials
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Oliver Faehnle
,
Marius Doetz
Abstract
The process of ductile mode grinding has been analyzed experimentally. Besides the traditional approach, controlling the depth of a cut on feed-controlled ultra-precision machines (UPMs), two alternative approaches have been tested. By applying fluid jet polishing (FJP) using a grinding slurry, a stable ductile mode grinding could be set up. Subsequently, loose abrasive grinding processes on load-controlled traditional spindle machines have been tested to be suited for ductile mode grinding identifying the dependence of crack initiation on the type of slurry fluid being applied. In that way, substantially improved levels of surface roughness could be achieved, although local brittle cracking within the generated clear apertures still remained. Furthermore, critical process parameters were identified determining the process window of feed-controlled ductile grinding applied on state-of-the-art UPM machineries. These have been analyzed experimentally, and it was found that the critical depth of a cut significantly depends on the set of critical process parameters being applied. Finally, the critical ductile grinding process parameters could be identified determining the generated level of surface roughness achieving 0.83 nm Ra on tungsten carbide.
References
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©2017 THOSS Media & De Gruyter, Berlin/Boston
Artikel in diesem Heft
- Cover and Frontmatter
- Community
- News from the European Optical Society EOS
- News
- Topical issue: Optical Surfaces
- Editorial
- Topical issue on optical surfaces
- Research Articles
- Freeform surface descriptions. Part I: Mathematical representations
- Freeform surface descriptions. Part II: Application benchmark
- Analysis of critical process parameters of ductile mode grinding of brittle materials
- Spectral laser damage testing of optical materials
- Reducing light scattering from surface contaminations by thin film design
- Scattering from reflective diffraction gratings: the challenges of measurement and simulation
- Defined wetting properties of optical surfaces
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Artikel in diesem Heft
- Cover and Frontmatter
- Community
- News from the European Optical Society EOS
- News
- Topical issue: Optical Surfaces
- Editorial
- Topical issue on optical surfaces
- Research Articles
- Freeform surface descriptions. Part I: Mathematical representations
- Freeform surface descriptions. Part II: Application benchmark
- Analysis of critical process parameters of ductile mode grinding of brittle materials
- Spectral laser damage testing of optical materials
- Reducing light scattering from surface contaminations by thin film design
- Scattering from reflective diffraction gratings: the challenges of measurement and simulation
- Defined wetting properties of optical surfaces
- Research Articles
- Methodology for assessing laser-based equipment
- Does the foveal shape influence the image formation in human eyes?
