Interchange of Heat in Saw Disc Body During Cutting

Abstract

The paper presents the experimental results of a research aimed at the distribution of the temperature on the circular saw blade body. The temperature was measured at two distances from the centre of the circular saw blade body (70 mm, 140 mm) by means of an infrared thermometer. Two circular saw blades with the diameter of 350 mm and a variable adjustment of the body (with slots and without the coating, with both slots and coating) were used for the longitudinal sawing of the spruce wood (Picea excelsa) with the thickness of h = 37 mm. Feed speeds ware vf1 = 14 mpm, vf2 = 17 mpm and vf3 = 20 mpm. Cutting revolutions n = 4100 /min. were constant. The measured temperature was in the range from 21 °C till 27 °C. The highest measured temperatures were recorded on the circular saw blade with the slots and coating.

Influence of temperature distribution on circular saw blade natural frequencies during cutting

“…However, because the temperature on the periphery decreases natural frequencies (Strzelecki 1974;Schajer 1986;Nishio and Marui 1996;Svoreň et al 2017;Svoren et al 2019), the critical speed of the saw blade and thereby the maximum rotational speed of the blade are also reduced. In practice, this case is usually solved with radial slots made on the periphery of the saw blade (Fig.…”