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Direct control of cutting tools by novel microtechniques

: Lüthje, H.; Löhken, T.; Böttcher, R.

Verband der Elektrotechnik, Elektronik, Informationstechnik -VDE-:
MICRO.tec 2000. VDE World Microtechnologies Congress: Applications - Trends - Visions. Proceedings. Vol.1 : VDE World Microtechnologies Congress, September 25 - 27, 2000, Expo 2000, Hannover, Germany
Berlin: VDE-Verlag, 2000
ISBN: 3-8007-2579-7
World Microtechnologies Congress (MICROTEC) <2000, Hannover>
Conference Paper
Fraunhofer IST ()
smart tool; microsystem; temperature and wear sensor; integrated thin film sensors

This paper deals with novel smart tools for the cutting industry. Based on the combination of advanced coating techniques with an efficient sensor-and microsystem technology smart tools have been realized, which enable on-line control of the cutting conditions measured directly at the cutting edges. For achieving this, special thin film sensors for measurement of temperatures and wear have been integrated into the hard coating system of cutting inserts. The electrical connection of the sensors was performed by micro mechanical contacts which connected the integrated sensors and thin film circuit structures to a micro electronic module, which contained signal conditioning and telemetric transfer of the data to the control station of the lathe. The tool was tested during turning of aluminium alloys and steel C45. Whereas tests with C45 showed an insufficient strength of the insulation layer, aluminum cutting leads to interesting results. It turned out, that temperature rise from room temperature to almost maximum temperature occurs within milliseconds only.