我厂的产品中,有些孔的加工精度要求很高;例如苏式 K 型悬臂式水泵叶轮上的孔,要求达到 A 级精度,光洁度要求▽▽_6,孔与叶轮曲面的垂直度是0.016/100公厘。为了达到以上的质量标准,我们曾经采用浮动铰刀等多种方法来加工,但都不能得到良好的结果。后经加工车间李传尚同志提出, For example, the holes on the impeller of the Soviet K-type cantilever pump are required to achieve Class A accuracy and smoothness requirements ▽▽ _6. The verticality between the hole and the impeller surface is 0.016 / 100 mm. In order to achieve the above quality standards, we have used a variety of methods such as floating reamers to process, but can not get good results. After processing workshops Comrade Li Chuan Shang proposed,