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为了提高小孔加工质量,我们用黄铜制做了一种小孔研磨器。用它来研磨孔径φ1.7～3.5毫米,孔深3～20毫米的淬火通孔,扩张量在0.1毫米以上,不圆度在0.001毫米以下,喇叭口不超过0.001毫米,光洁度可提高五级达到▽▽▽▽11以上。研磨器的形状如图所示。它的大端夹持在研磨机或车床的卡盘上,工作部分中段的两侧开有0.3毫米的弹性槽。当锥度心轴朝卡盘方向打紧时,中段外径就胀大,有效地防止和消除被研孔两端喇叭口。研磨器内径与外径的比约为1:1.8,前端孔比心轴外径稍大些。锥度心轴可用大号缝衣针代替,为保证孔与心轴(针)配合良好,孔内先灌入适量粗研磨剂,与心轴(针)
In order to improve the quality of the hole processing, we made a small hole grinder brass. Use it to grind the quenched through hole with a hole diameter of 1.7 ~ 3.5mm and a hole depth of 3 ~ 20mm with an expansion of 0.1mm or more, an out-of-roundness of below 0.001mm, a bell mouth of not more than 0.001mm and a smooth finish of up to five Reached ▽▽▽▽ 11 or more. The shape of the grinder as shown. Its large end is clamped on a chuck of a grinding machine or a lathe. The sides of the middle section of the working section are provided with 0.3 mm elastic grooves. When the taper mandrel tighten the direction of the chuck, the middle section of the outer diameter of the expansion, effectively prevent and eliminate the bells at both ends of the bell mouth. Grinder diameter and diameter ratio of about 1: 1.8, the front hole slightly larger than the outer diameter of the mandrel. Taper spindle can be replaced by a large needle, to ensure that the hole and the mandrel (needle) with a good hole first poured into the amount of coarse abrasive, and the mandrel (needle)