| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drilling tool forming rotationally symmetrical and particularly cylindrical apertures in a workpiece in a machining production method. <P>SOLUTION: The drilling tool (1) comprises a support shank (2) and an interchangeable cutting insert (3) which is fit to the support shank (2) and has an asymmetrical main lip (15) divided into a guide lip (10) having a supporting land (12) and a guide land (23) trailing the supporting land (12), and a clearance lip (13) having a trailing clearance portion (14), wherein a guide land (28) and a supporting land (29) are formed on the lateral surface of the support shank (2), continuously extend the guide land (23) and the supporting land (12) of the cutting insert (3), respectively and further guide the drilling tool (1) onto the inner wall of a drill hole during a drilling operation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
