| 摘要 |
A boring tool includes a clamping shaft and a boring body. Between the end face of the boring body and the clamping shaft, at least one main blade extends along a longitudinal axis of the boring body and includes a blade web with a rake face facing a groove-shaped chip space, and a free surface on the outer circumferential side, these converging at a cutting edge which runs along the boring body longitudinal axis and which removes material on an inner wall of a pre-bored workpiece core bore hole as a result of said boring tool being rotated. The main blade extending along the longitudinal axis of the boring body transitions, at the end face of the boring body into a groove blade that is aligned transversely to the element longitudinal axis of the boring body. This groove blade allows the boring tool to be displaced, prior to removing the material by rotation, into the core bore hole in an axial lifting motion such that a groove is formed which extends along the longitudinal axis of the core bore hole, the main blade of the boring tool engaging in this groove. |
