WOOD CUTTING MODES IN CIRCULAR SAWING MACHINES DEPENDING ON HEAT RESISTANCE OF THE MATERIAL OF THE TOOL EDGES
The heatphysical analysis of wood cutting process by circular saws has been carried out. The thermal capacity in a contact zone of saw with a work piece, cutting temperature, heatreturn factors of cutting part of saw, thermal firmness and the major technology factors of cutting process were taken in account in the appointment of wood cutting modes depending on heat resistance of edges material of the cutting part of the saws. Essential dependence of feeding speed of heat resistant temperature of a saw tooth material established. The results of pilot studies on determination of average value of tooth heatreturn factor, the temperature distribution on its height and dependence of cutting temperature on cutting capacity are given. Heatreturn factors values of saw teeth are de-fined by a method of complete factorial experiment. Formulas are developed for calculation of giving speed in circular saw machines taking into account cutting temperature for a longitudinal and cross-section cutting of wood. Application of cutting modes by circular saws on heat resistance of a material of the tool will allow to re-duce an emergency expense of round saws, to optimize cutting modes, to lower costs of tool preparation.