| 摘要 |
In a device for rough turning and shaft turning of a workpiece, a cutting insert is provided with a main cutting edge followed by an auxiliary cutting edge. The main cutting edge is divided into a first main cutting edge functioning as a rough cutter followed by a second main cutting edge performing rough smoothing and then by the auxiliary cutting edge which provides the final smoothing. The first main cutting edge is set at a greater angle to the axis of the workpiece than the second main cutting edge which, in turn, is set at a greater angle to the axis of the workpiece than the auxiliary cutting edge. |
