Development of Dressing Method for Superabrasive Wheel by Gentle Wet Blasting

作者开发了一种超硬磨料砂轮的新型修整方法，即采用旋转修整机修整，并采用温和湿法喷砂修整。这种新方法的特点是将砂轮与旋转修整机整形后，对超级磨料砂轮进行温和的湿法喷砂。温和的湿法喷砂是一种非常有效的工艺，不仅可以清除掉的砂轮堵塞，而且还可以选择性地从修整后的砂轮表面清除粘结剂。对该新方法进行了试验研究，发现微湿喷砂修整砂轮也获得了理想的工作表面，修整后的砂轮具有良好的磨削性能。结果表明：1.缓湿喷砂修整能有效地去除砂轮修整表面各种粘结材料中的粘结物质，并能通过调整喷砂时间来控制磨粒凸出。微湿喷砂修整后的砂轮工作面上的每个磨粒都用粘结材料牢固地夹持，所有磨粒的点均匀地排列在同一圆周上。这是获得预期的表面粗糙度并延长车轮寿命所必需的。对缓湿喷砂修整后的金刚石砂轮的磨削性能进行了测试，结果表明，在表面粗糙度、磨削功率、法向磨削力和磨削比等各项性能指标上都达到了预期的效果。对于多孔型陶瓷结合剂CBN砂轮，使用较软的合成树脂颗粒进行温和的湿法喷砂比用氧化铝棒修整具有更好的磨削性能。

The authors have developed a new truing and dressing method for superabrasive wheel which is comprised of truing with rotary truer and dressing by gentle wet blasting. This new method is characterized by that after the wheel is trued with the rotary truer, the gentle wet blasting is applied to the superabrasive wheel. Gentle wet blasting is very effective process not only to blow off clogging of removed stocks but also to remove only bonding material selectively from the trued wheel surface. We have carried out the test of this new method and found that the dressing by the gentle wet blasting makes the ideal working surface on the grinding wheel Also, it is found that the wheel dressed by this new method shows excellent grinding performance. Obtained results are summarized as follows :1. The dressing by gentle wet blasting is very effective to remove only bonding material selectively from the trued wheel surface for every bonding material and enables to control grain protrusion finely by regulating the blasting duration.2. Each abrasive grain on the working surface of the wheel dressed by the gentle wet blasting is held rigidly with bonding material and the points of all abrasive grains are arranged uniformly on the same peripheral circle. This is desirable to obtain the surface roughness expected and to elongate the wheel life.3. The grinding performance of the diamond wheels dressed by the gentle wet blasting shows the desirable results for every performance of the surface roughness, the grinding power, the normal grinding force and the grinding ratio.4. For the porous type vitrified bond CBN wheel, the gentle wet blasting by using comparatively soft synthetic resin particles brings us the better grinding performance than the dressing by the alminum oxcide stick.