在车床上铰孔时,容易出现喇叭口。如果使用附图所示的工具,则可解决这个问题。φ14孔与铰刀的直柄是滑配合,存在一定的间隙。当铰刀切削部分开始切削时,柄部低于中心,铰刀中心与工件中心有一斜角。由于切削时,铰刀直柄的销轴同时受到扭力,所以不能自动校正。当切削部分全部切入,校准部分也进入一部分 Reaming holes in the lathe, prone to bell mouth. If you use the tools shown in the figure, you can solve this problem. φ14 hole and reamer shank is slip fit, there is a certain gap. When the cutting part of the reamer starts cutting, the shank is lower than the center and the reamer center is at an oblique angle to the center of the workpiece. Due to cutting, reamer shank shank of the same time by the torque, it can not be automatically corrected. When cutting all the cut, the calibration part also entered part