高切込み研削における研削液の冷却作用に関する研究

抄録

Cooling action of grinding fluid is one of the most important work for improving the grinding efficiency, geometrical accuracy, and surface quality. However, there is only a little information on the heat transfer coefficient, α, in the wheel to workpiece contact zone under deep grinding. New technics for measuring α are proposed and measures for improving the cooling efficiency are given. α shows the peak value at the fluid entrance point into the contact zone, and it sharply decreases with the contact length; however, the decreasing rate is less than the theoretically expected. The average value of α in the contact zone is about 2 to 3 times as much as the theoretical because of the starling action performed by cutting edges in the contact zone. To enhance the cooling efficiency especially at the fluid exit point out of the contact zone, it is important to increase the velocity of grinding fluid and wheel speed, and it is also desirable to form shallow grooves on a wheel periphery.