ON THE DETERMINATION OF THERMAL PHENOMENA DURING DRILLING .1. ANALYTICAL MODELS OF TWIST DRILL TEMPERATURE DISTRIBUTIONS

Analytical temperature distributions along the cutting edge and on the flank face of a twist drill are described. The analysis is based on the assumption that the material being machined by the drill lips can be represented by a series of concentric elements. Jaeger's classical technique was used to obtain a steady state solution while a transient solution evolved from a closed-form approach to a semi-infinite solid having a constant surface heat flux. The theoretical approach also identified important physical quantities, such as the absorption coefficient of the work material, which affect the cutting temperatures. Experimental data are presented in Part II of this paper and are compared with other results that appear in the literature. © 1990.