Effect of the cross-sectional-shape design of a drill body on drill temperature distributions

The temperature distributions along the primary cutting edges and on the flank surfaces are calculated numerically using the variational approach of the three-dimensional finite element method for two different cross-sectional shape designs of a drill body. This is to illustrate that the different cross-sectional shape designs of a drill body have some degree of influence on the drill temperature fields. The calculated results demonstrate that the possibility of a longer drill life from the thick web drills with curved primary cutting edges is due to a more uniform temperature distribution and a relatively lower temperature along the primary cutting edges and on the flank surfaces.