一般在镗床上镗孔加工中,当轴向切削力始终是压向镗床主轴时,镗杆,接秆、钻头等在加工中不会有松动现象。当轴向切削力不是压向镗床主轴时,就不能完全靠锥柄锥度来紧固和传递扭矩。为此常用斜铁插入尾柄与镗秆相通的长槽来紧固。但是,这种紧固方式既不安全可靠,又不适用。我厂根据国外机床附件样品设计了一种镗杆紧固装置,通过生产实践证 Boring machine boring in the general processing, when the axial cutting force is always the main axis of the pressure to the boring machine, boring bar, then stalk, drill and other processing will not be loose phenomenon. When the axial cutting force is not pressed against the main shaft of the boring machine, the taper taper can not be used to tighten and transmit the torque completely. To this end commonly used oblique iron inserted caudal peduncle and boring stem connected to the long groove to tighten. However, this method of fastening is neither safe nor suitable. I plant a sample of foreign machine tool accessories designed a boring bar fastening device, through the production practice certificate