ROTARY TOOL FOR PRECISION MACHINING OF A DRILLED HOLE IN A WORKPIECE, AND METHOD FOR PRECISION MACHINING OF A DRILLED HOLE

摘要

In order to achieve as highly accurate an alignment of the frictional tool as possible and therefore as high a drilled hole quality as possible during the precision machining of a drilled hole, the cutting edges of the frictional tool are divided into two cutting groups, the cutting edges of which are spaced apart with respect to one another in each case by an axial spacing from one another. Here, the axial spacing is selected in such a way that, at a predefined first, slower feed speed, merely the cutting edges of the first cutting edge group are in engagement with the workpiece and, at a higher, predefined second feed speed, all cutting edges are in engagement with the workpiece.

主权项

1. A rotary tool for precision machining of a drilled hole in a workpiece, in particular a frictional tool, having a tool head which extends in the axial direction and has a plurality of cutting edges on its circumference, which cutting edges are arranged on an identical cutting circle, wherein the cutting edges are divided into a first cutting edge group and a second cutting edge group and the two cutting edge groups are spaced apart from one another in the axial direction by an axial spacing which is selected in such a way that, at a predefined first feed speed, only the cutting edges of the first cutting edge group are in engagement with the workpiece, and that, at a predefined second feed speed which is faster than the first feed speed, the cutting edges of both the first and the second cutting edge group are in engagement with the workpiece.