(一)问题的提出:在内圆无心磨床3263上,加工圆锥外圈滚道时,起初是发现砂轮的耐用度很低,即不到自动修正时,砂轮便发出磨钝的征兆,继而寻找原因,是由于滚道毛坯角度总是较成品角度为小,因而在加工开始时,总是窄端面一边先见火花,然后随著磨量去除程度,火花逐渐向宽端面的一边移动,而后布满整个滚道表面 (A) the question raised: In the inner circle centerless grinder 3263, the processing of tapered outer raceway, initially found that the durability of the wheel is very low, less than automatic correction, the wheel will blunt signs of wear, and then look for The reason is that the angle of the raceway blank is always smaller than the angle of the finished product. Therefore, at the beginning of the process, the spark is always seen at the narrow end side, and then the spark gradually moves to one side of the wide end face with the amount of abrasion removed. Full raceway surface