Abstract
In this study, the applicability to surface grinding of the semi-cold-air, whose temperature is higher than that of the air in the conventional cold-air machining, is experimentally examined from the viewpoint in the cooling effect. By the result, the followings are found out: In case of semi-cold-air grinding, the cooling fluid is gas phase similar to the airflow following wheel rotation and then is mixed easily with the airflow. This makes the cooling effect at the grinding point and the working surface of grinding wheel steady and prevents thermal shock of grains. As a result, breaking and falling off of grains are suppressed, and then wheel wear decreases. Since this improves the finished surface roughness, the semi-cold-air can be said to be suitable as cooling-method for grinding.
