Analiza porazdelitve toplote pri brušenju titanove zlitine VT 9 in njena povezava do zaostalih napetosti
Analysis of the heat distribution when grinding of a VT 9 titanium alloy and its relation to residual stresses

english
slovenian

2002

volume 48, issue 10

Univerza v Ljubljani, Fakulteta za strojništvo

Heat distribution during machining is one of the phemenological of this process becaus it significantly influences the funktional properties of machined surfaces. This paper deals with heat distribution during the grinding of a VT9 titanium alloy and its relationship to the quality of ground parts in terms of residual stresses. The analysis of the heat distribution is based on a measurement of the temperature in the contact of the grinding wheel and workpiece, and the tangential component of the cutting force.The heat distribution when grinding a VT9 titanium alloy differs from the heat distribution when grinding a conventional (14 209.4) roll-bearing steel (a typical representative of ground-hardened steels) mainly because of the low heat conductivity of titanium alloys. Also the application of CBN and diamond grinding wheels significantly reduces the thermal exposition of the ground parts, primarly when applying cutting fluid. This fact significantly influences the residual stresses after grinding. The results of the analysis show that there is a strong correlation between energy partioning and residual stresses.

16.09.2009