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机床主轴旋转轴线和被加工孔的轴线重合,这是决定孔加工质量的工艺要素之一。当被加工孔和机床主轴不经单独找正轴线,例如在摇臂钻床上对大型零件进行多个孔加工时,这种同轴性是难以达到的。布良斯克机器制造厂研制成功在生产中能保证机床主轴轴线和被加工孔的轴线重合而结构新颖的铰孔卡头。图为铰刀卡头,它由下列主要零件组成:卡头尾柄6;铰刀杆1;有两个相互垂直的滚珠滚道的十字
The rotation axis of the machine tool spindle coincides with the axis of the hole to be machined, which is one of the process elements that determine the machining quality of the hole. This coaxiality is difficult to achieve when the hole to be machined and the spindle of the machine tool are not machined to a single positive axis, such as multiple hole machining of large parts on a radial drilling machine. Bryansk Machine Works successfully developed in production to ensure that the axis of the spindle and machined holes coincide with the axis of the novel structure of the reaming chuck. The picture shows the reamer chuck head, which consists of the following main parts: tailstock handle 6; reamer rod 1; cross with two ball rolling perpendicular to each other