The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel

Pearce, T. R.A.; Smith, D. J.; Ashfold, M. N.R.; Smith, Nicholas

Abstract

Diamond-coated fibres, produced by a hot filament chemical vapour deposition technique and having a high facet density, have been prepared for use as abrasives. Two grinding wheels containing such fibres have been fabricated with the fibres placed in a radial orientation. One wheel contained a single fibre, the other contained multiple fibres. The single diamond fibre wheel was used first to evaluate the potential for ductile grinding of BK.7 glass. A ductile-brittle transition was found, occurring at a depth of cut of ? ?m over a range of feed rates (5-50 um/s). The multiple diamond fibre wheel was then used to grind an area, using parameters identified by the single fibre tests. Microstructural analysis revealed that material removal was predominantly in the ductile mode.

Citation

Ashfold, M. N., Pearce, T. R., Smith, D. J., & Smith, N. (2003). The ductile grinding of glass using diamond fibres oriented radially in a grinding wheel. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 217(3), 387-396. https://doi.org/10.1243/095440503321590541

• Journal Article Type: Article
• Publication Date: Apr 23, 2003
• Journal: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
• Print ISSN: 0954-4054
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 217
• Issue: 3
• Pages: 387-396
• DOI: https://doi.org/10.1243/095440503321590541
• Keywords: glass, grinding glass, diamond fibres, grinding wheel
• Public URL: https://uwe-repository.worktribe.com/output/1071037
• Publisher URL: http://dx.doi.org/10.1243/095440503321590541
• Additional Information: Additional Information : The work comes from an EPSRC supported research project, with industrial support. The project review rated the project highly. Further industrial evaluation was done after the project ended. Knowledge transfer has also occurred through presentations to IGT Members at Members Technical Meetings. Ductile grinding is necessary to prevent brittle fracture and associated cracking in the grinding of precision optics, but currently results in low removal rates. By using CVD techniques to grow diamonds with a specified facet pattern and higher concentration than conventional diamond wheels, elevated removal rates are possible.