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Laser-assisted turning of silicon-nitride ceramics

: Klocke, F.; Bausch, S.; Bergs, T.

Heinrich, J.G. ; Deutsche Keramische Gesellschaft e.V. -DKG-:
Ceramic Materials and Components for Engines : 7. International Symposium "Ceramic Materials and Components for Engines" - applications in energy, transportation and environment systems
Weinheim: Wiley-VCH, 2001
ISBN: 3-527-30416-9
International Symposium on Ceramic Materials and Components for Engines <7, 2000, Goslar>
Journal Article, Conference Paper
Fraunhofer IPT ()
laser-assisted machining; laserunterstützte Bearbeitung; laser-assisted turning; laserunterstütztes Drehen; Laserintegration in Werkzeugmaschinen; silicon nitride; Siliziumnitrid; ceramic; Keramik

The production of high-precision parts made of silicon nitride ceramic such as roller bearing rings or valves, has required time and cost intensive finish-grinding operations up to now. This situation has resulted in a demand for more efficient machining techniques to be developed and made available to manufacturing industry. A prototype precision lathe with an integrated high power diode for laser-assisted turning has been developed at the Fraunhofer-IPT, which co-operated closely with industrial partners. Continuous heating of the workpiece via laser and the resultant localized loss of material strength, make it possible to machine ceramics using a geometrically defined cutting edge. Complex silicon nitride parts can be manufactured without cooling lubricant, considerably more flexibly and with surface qualities of up to Ra=0.3 µm.