镗磨的方法近来已被广泛采用,因为这种方法除了能得到高的精度和光洁度以外,还能矯正前一工序所留下的形状誤差。通常,都是采用两种不同粒度的油石來进行粗鏜磨和精鏜磨;鏜磨的余量为0.03～0.04公厘。镗磨的油石的选擇,对于鏜磨效果有着很大的影响。現在就将怎样选擇油石說明如下。 (一)油石长度的确定:确定油石长度以前,必須先确定油石长度l与 The method of boring and milling has recently been widely adopted because this method, in addition to achieving high precision and finish, corrects the shape error left by the previous process. In general, two types of stone with different grain sizes are used for rough boring and fine boring; the balance of the boring mill is 0.03 to 0.04 mm. Boring the choice of whetstone, boring mill effect has a great impact. Now how to choose whetstone as follows. (A) the determination of the length of whetstone: determine the length of whetstone, you must first determine the whetstone length l and