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Ackerl, Norbert; Warhanek, Maximilian; Gysel, Johannes; Wegener, Konrad
Materials & design, April 2020, 2020-04-00, 2020-04-01, Letnik: 189Journal Article
A 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 min−1 and a maximal geometric deviation of 3 μm 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 μm over millimeter-sized contours can be manufactured. The meta-stable diamond structure persists and is assessed via Raman spectroscopy studies at laser cut grains. Display omitted •All-in-one laser conditioning process for super-abrasive grinding tools including profiling, truing, and sharpening.•High-precision laser manufacturing with tangential strategies using 100 W average power enables a 3μm tolerance band.•Scanhead-free laser processes with mechanical axes and a spindle allow an industrial implementation on existing machine tools.•The diamond phase persists proven by Raman spectroscopy and set-free cutting edges facilitate high-speed grinding.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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