| 摘要 |
A method for machining a through bore (5) within a workpiece (W) and a device (10) for the implementation of the method. The method is suitable for finishing and semi-finishing machining operations of through bores and holes, in particular, tapping of internal threads, drilling, counter-boring, reaming, roll burnishing and piercing, etc. The method comprises imparting to the cutting tool (4) a linear motion accompanied by rotation thereof about the bore (5) axis and imparting to the tool auxiliary motion which is associated with the propelling thereof to an initial position after completing each stroke. Propelling of the tool is carried outside the bore (5) through a duct (14) between the bore (5) exit and entrance. Since friction associated with linear backward motion of the tool (4) through the bore (5) is avoided it is possible to reduce wear of the cutting tool (4) to improve tool life and to increase productivity of machining.
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