Tool and method for generating a threaded hole, the tool having chip dividers

A tool for generating a threaded hole, wherein:

• a) the tool is rotatable in a working movement in a rotational movement with a predetermined direction of rotation about a tool axis (A) extending through the tool and at the same time is movable in an axial forward direction axially of the tool axis,
• b) said tool comprises at least one thread generation area and at least one drilling area which are rigidly motion-coupled to each other,
• c) the drilling area is provided for generating a core hole and is arranged axially offset to the tool axis with respect to the thread generation area and/or is arranged in an area of the tool lying further forward in the forward direction, in particular at a front or free end, than the thread generation area,
• d) the thread generation area projects radially to the tool axis further outwards than the drilling area,
• e) the thread generation area runs along a helical line or thread helix with a predetermined thread pitch angle and a predetermined winding sense of the thread to be generated and has a working profile which corresponds to the thread profile of the thread to be generated,
• f) the drilling area has at least one drilling edge, and
• g) at least one chip divider is arranged on the drilling edge, which forms an interruption of the drilling edge.

A method for generating a thread with a predetermined thread pitch and with a predetermined thread profile in a workpiece, comprising:

• a) using a tool for generating a threaded hole, wherein:
• (i) the tool is rotatable in a working movement in a rotational movement with a predetermined direction of rotation about a tool axis (A) extending through the tool and at the same time is movable in an axial forward direction axially of the tool axis, (ii) said tool comprises at least one thread generation area and at least one drilling area which are rigidly motion-coupled to each other, (iii) the drilling area is provided for generating a core hole and is arranged axially offset to the tool axis with respect to the thread generation area and/or is arranged in an area of the tool lying further forward in the forward direction, in particular at a front or free end, than the thread generation area, (iv) the thread generation area projects radially to the tool axis further outwards than the drilling area, (v) the thread generation area runs along a helical line or thread helix with a predetermined thread pitch angle and a predetermined winding sense of the thread to be generated and has a working profile which corresponds to the thread profile of the thread to be generated, (vi) the drilling area has at least one drilling edge, and (vii) at least one chip divider is arranged on the drilling edge, which forms an interruption of the drilling edge;
• wherein:
• b) the tool is moved into the workpiece in one working movement during first work phase,
• c) the working movement comprises a rotational movement with a predetermined direction of rotation about the tool axis of the tool and an axial feed movement of the tool in an axial forward direction axially of the tool axis, synchronised with the rotational movement according to the thread pitch of the thread generation area, such that a full rotation of the tool about the tool axis corresponds to an axial feed of the tool by the predetermined thread pitch,
• d) during the working movement, the drilling area of the tool generates a core hole in the workpiece and the thread generation area generates phase a thread in the inner wall of the core hole produced by the drilling area in the first working, the thread running under the predetermined thread pitch, the drilling area and the thread generation area executing the working movement together without changing their relative position to each other.