砥石-工作物接触面における冷却効果

鋼の立軸平面重研削に関する研究

抄録

The cooling effect on the wheel-work contact area is expected because the contact area is large in the vertical spindle abrasive machining of steel. The considerations including the cooling effect must be given to the grinding temperature on the contact area. This report experimentally studies the heat transfer coefficient to coolant on the contact area and the influeAces of the heat transfer coefficient and the grinding conditions on the contact area grinding temperature. The main results are as follows. On the contact area, the heat transfer coefficient of 0.5-1.0 cal/cm²·s·°C can be obtained relatively easily in the proper methods of cooling. It is considered that the relatively higher heat transfer coefficient can be obtained because of velocity increase of coolant stream on the contact area by rotating wheel. The cooling effect on the contact area increases with widening contact area and slowing work feed rate as well as increasing heat transfer coefficient. The cooling effect of the order of 50% was obtained in the case of slow feed rate (6-12 m/min) by the proper cooling methods. The grinding temperature on the contact area dose scarcely change with the feed rate as a result of cooling.