我厂祝广贤同志改进了一种磨间断孔的磨具。这种磨具的结构如附图,它跟旧磨具不同的地方是,在心轴1上装两个同样大小的磨轮2。这两个磨轮之间的距离视间断孔的距离而定。3是轴套,4是垫圈,5是螺钉。由于这种磨具是用于精加工,所以各主要配合部分都要有高的精度,特别是同心度。 I plant Zhu Guangxian comrades to improve the grinding of a broken hole in the abrasive. The structure of this abrasive tool is shown in the attached figure, which is different from the old abrasive tool in that two same-sized grinding wheels 2 are mounted on the mandrel 1. The distance between the two grinding wheels depends on the distance between the broken holes. 3 is a sleeve, 4 is a washer, 5 is a screw. Since this type of grinding tool is used for finishing, all the major cooperating parts must have high precision, especially concentricity.