Ultra-short pulsed laser conditioning of metallic-bonded diamond grinding tools
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-01-29 |
| Journal | Materials & Design |
| Authors | Norbert Ackerl, Maximilian Warhanek, Johannes Gysel, Konrad Wegener |
| Institutions | ETH Zurich, Inspire |
| Citations | 27 |
Abstract
Section titled āAbstractāA novel approach for machining of cylindrical ultra-hard materials with a highly defined contour is presented. Diamond grinding tools with complex geometry are manufactured with picosecond orthogonal and quasi-tangential laser ablation. Hitherto, laser manufacturing required a special axis configuration and optical beam deflection devices are utilized. Here, strategies and processes on a scanhead-free configuration using ultra-short pulsed laser are discussed enabling straight-forward implementation in industry. This rapid and flexible approach for the production of master tools for industrial grinding processes reveals benefits compared to conventional techniques. The manufacturing time is comparable to standard processes, however, increased grain protrusion is attained with the presented laser sharpening strategy. An ablation study for maximal material-removal rate reveals the impact of wavelength, strategy, and repetition rate at high average power up to 100 W. A combined laser manufacturing routine enables an ablation rate of 35 mm3 minā1 and a maximal geometric deviation of 3 Ī¼m after finishing. The final grinding tools are sharpened by a radial laser process preferentially removing the metal-based binding material. Hence, high-precision diamond grinding wheels with a mean error of smaller 1 Ī¼m over millimeter-sized contours can be manufactured. The meta-stable diamond structure persists and is assessed via Raman spectroscopy studies at laser cut grains.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2011 - Conditioning and monitoring of grinding wheels [Crossref]
- 2017 - Analytical modeling of grinding-induced subsurface damage in monocrystalline silicon [Crossref]
- 1995 - Grinding assisted by Nd:YAG lasers [Crossref]
- 1997 - Laser assisted machining: an overview [Crossref]
- 2002 - A novel laser-assisted truing and dressing technique for vitrified CBN wheels [Crossref]
- 2003 - Laser dressing of vitrified aluminium oxide grinding wheels [Crossref]
- 2004 - Dressing of resin-bonded superabrasive grinding wheels by means of acousto-optic Q-switched pulsed Nd:YAG laser [Crossref]
- 2006 - Laser dressing of metal bonded diamond wheel [Crossref]
- 2010 - Experiment and numerical simulation study on laser truing and dressing of bronze-bonded diamond wheel [Crossref]
- 2012 - Dressing and truing of hybrid bonded CBN grinding tools using a short-pulsed fibre laser [Crossref]