Model of Thermal State of the System of Application of Coolant in Grinding Machine

A high grinding performance and ensuring the accuracy and quality of processing depend on a stable thermal regime in the cutting zone, which is carried out by efficient removal of the released heat. Application of lubricating and cooling fluid allows reducing the power and cutting forces, accelerates heat transfer, provides a reduction in temperature in the cutting zone. It’s found out, that the most instability is characteristic for the heat entering the machine tool from the coolant system. Potentialities of decreasing of heat fluxes influence at the grinding machine on the accuracy by improving cooling ability of coolant tank are researched. The heat exchange processes in the coolant tank of the grinding machine are studied. A mathematical model describing the temperature regime of coolant in the grinding machine tank is proposed. The model makes it possible to estimate the steady-state and non-stationary temperatures of the coolant in the tank, depending on the course of the stages of the grinding cycle and to define the rational volume of the coolant, considering the cooling of cutting zone, the grinding parameters, and the characteristics of the grinding wheel. The dependence of the value of the average coolant temperature in the grinding machine tank from volume of coolant is determined.