Abstract
In order to examine the cutting edge temperature in wood cutting, the back face of a single sawtooth tipped with tungsten carbide was rubbed with a disc of flat-sawn beech board at several velocities, and the temperature at the point on the side face, close to the extreme edge, was measured with an infrared radiometric microscope (Fig. 1).
The cutting edge temperature depended strongly on the rubbing velocity (V) (Figs. 4-7), and on the normal (FN) and the paralell (FP) forces in rubbing, particularly at higher velocities (Fig. 8). The temperature, in steady state, was found to have a linear relationship with the product of V and FP on a logarithmic graph (Fig. 9). This relationship suggested that the temperature rises over 400℃ at a usual velocity in wood cutting, e. g. 50 m/s, owing only to the friction on the back face.
