Toolcoatings as thermocouple for chipping

Biermann, D.^{1, a}; Pantke, K.^{1, b}; Tillmann, W.^{2, c}; Vogli, E.^{2, d}

1)

Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 301, 44227 Dortmund

2)

Lehrstuhl für Werkstofftechnologie LWT, Technische Universität Dortmund, Leonhard-Euler-Str. 2, 44227 Dortmund

a) biermann@isf.de; b) pantke@isf.de; c) Wolfgang.tillmann@udo.edu; d) Evelina.vogli@udo.edu

Kurzfassung

The acknowledgement of temperature influences onto the cutting edge and workpieces achieves a growing relevance. Particularly with regards to the cutting material-, coating-, and cooling lubricant selection, the knowledge of appearing temperatures is essential. Up to now, the action-close thermo measurement at the cutting edge is conducted by video-thermographic recordings, pyrometers or according to the principle of resistance-measurements. Modern coating technology offers new options. Already established measuring methods allow the detection of temperature and wear following the principle of conductivity variation by close meshed conductor structures plated on the cutting inserts. An improved method utilizing an alternative physical principle now allows to implicate coatings for temperature measurements by means of the so-called “Seebeck-Effect”. Applying the principle of thermo electricity just as in conventional thermo couples, different metals are affiliated with each other and exposed to an temperature gradient, so that a measurable voltage results.

Schlüsselwörter

Coatings, temperature measurement, cutting process

Veröffentlichung

In: TMS, 138th Annual Meeting and Exhibition, Supplemental Proceedings: Volume 3: General Paper Selections, 15.2.-19.2. 2009, San Francisco, S. 389-393