热网络模型, 热流强度, 中腰导轨移动式立柱, 热阻

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A waist rail mobile column of MKL7120 CNC forming grinder made in Hangzhou Machine Tool Group Co., Ltd. was taken as research subject.A thermal network model was constructed according to the structural characteristics of the upright column. The thermal network model and the upright column’s temperature(through experiment) at special points measured on the thermal steady state was used into reversing the heat flow intensity.Then using the circuit simulation software Multisim11,and put the reversing results into the thermal network model which had already been established to solve all nodes’ temperature of the thermal network. Then comparing the nodes’ temperature data with those experimental data, the errors is less than 2%. That demonstrates the established model is correct and reasonable. This model used to analyse the characteristics of spindle speeds and the speeds of the grinding head slider provides important data for the further studies of transient temperature field and thermal deformation of the upright column.