用机铰刀在机床上铰孔时,由于机床精度或铰刀安装精度不高,使工件孔和铰刀中心线同轴度差,影响孔的尺寸精度和几何精度。浮动铰刀就是采用一种特殊结构将铰刀安装在刀杆上,使得铰刀以一定的浮动量来补偿工件与铰刀的定位精度或机床精度不高的缺点。 Machine reamers reaming hole in the machine, due to machine accuracy or reamer mounting accuracy is not high, the workpiece hole and reamer centerline coaxiality, affecting the hole size accuracy and geometric accuracy. Floating reamer is a special structure of the reamer mounted on the arbor, making the reamer to a certain amount of floating to compensate for the workpiece and reamer positioning accuracy or machine tool shortcomings of high accuracy.