Development of Dressing Method for Superabrasive Wheel by Gentle Wet Blasting

提出了一种新的超硬磨料砂轮修整方法，即采用旋转式砂轮修整和湿式喷砂修整相结合的方法。该方法的特点是在旋转式砂轮修整机上修整砂轮后，对超硬磨料砂轮进行温和的湿喷砂处理。温和的湿喷砂是非常有效的工艺，不仅可以吹掉被去除材料的堵塞，而且可以选择性地从修整后的车轮表面去除粘合材料。试验结果表明，采用温和湿式喷砂法修整砂轮，可获得理想的工作表面，并具有良好的磨削性能。主要研究结果如下：1.通过温和的湿喷砂进行修整非常有效，可以从修整后的车轮表面选择性地去除每种粘合材料的粘合材料，并通过调节喷砂持续时间来精细控制颗粒突出。2.通过温和的湿喷砂修整的砂轮的工作表面上的每个磨粒被结合材料刚性地保持，并且所有磨粒的点均匀地布置在同一外周圆上。这对于获得预期的表面粗糙度和延长车轮寿命是理想的。经温和湿式喷砂修整的金刚石砂轮的磨削性能表明，其表面粗糙度、磨削功率、法向磨削力和磨削比等各项性能均达到了理想的效果.对于多孔型陶瓷结合剂CBN砂轮，采用较软的合成树脂颗粒进行温和的湿喷砂比用铝氧化剂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.