Abstract
An experimental technique has been developed for the measurement of the temperature distribution in the deformation zone and in the chip and tool during orthogonal cutting. The term orthogonal cutting is used for the special case where the cutting edge of the tool is perpendicular to the direction of relative motion of the workpiece and tool.
The method involves photographing the chip, tool and workpiece in a plane perpendicular to the cutting edge, using an infra-red sensitive photographic plate. The optical density of the plate is determined over the relevant field by means of a microdensitometer. A heated tapered strip, on which the temperature distribution is measured by means of a series of thermocouples, is photographed simultaneously with the tool and workpiece. This enables the optical density of the plate to be calibrated in terms of temperature, and the temperature distribution over the chip, tool and workpiece can hence be determined.
The effect of surface emissivity and of other factors on the accuracy of the technique are considered, and the results of an experiment using the photographic technique are presented and discussed in relation to previous theoretical and experimental work.