THERMAL ASPECTS REGARDING THE DRILLING PROCESS

Antonio TACHE¹

Carmen TACHE<sup>2


1</sup> PETROM SERVICE S.A. Bucharest, ROMANIA
² VALAHIA University of Targoviste, ROMANIA

Abstract. The more important parameters for understanding the problem of tool wear are the contact pressure distribution and the real contact area.
When hard particle slide on the edge of the cutting tool, the plastic deformation appear and make microwaves as results of the contact pressure. The contact area it is establish and the contact pressure decrease when is obtain the limit fatigue strength (ps). At this stress, the external force is taking over by elastic deformation.
Beginning to the proposed model, when a hard particles sliding to the edge of the cutting too, it is determined the variation of some parameters: contact pressure, the critical attack angle, global wear intensity.
 

Keywords: drilling process, heat flux, work piece, cutting tool

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