초록 ▼

A drilling tool, in particular for use in axially striking drive machines for drilling in rock, concrete or the like, which drilling tool is designed from both a vibration point of view by varying the abrupt changes in cross-section and from a drilling point of view by optimising the transport of th

A drilling tool, in particular for use in axially striking drive machines for drilling in rock, concrete or the like, which drilling tool is designed from both a vibration point of view by varying the abrupt changes in cross-section and from a drilling point of view by optimising the transport of the drilling dust. In order to arrange, from a vibration point of view, the abrupt changes in cross section, caused by the flute webs, in asymmetrically arranged axial positions, the inclination of the conveying flute constantly changes its size within a lead. Furthermore, the radial, tangential and axial force vector which acts on the drilling dust constantly changes its size, the radial force vector also changing its direction. In this way, the drilling dust is subjected to a constantly changing acceleration.

대표청구항 ▼

A drilling tool having an axis, comprising a drill head, a conveying helix adjoining the drill head and a chucking shank adjoining the conveying helix, the conveying helix having a flute web, the flute web having a face furthest from and parallel to the axis and a drilling-dust carrying surface, the

A drilling tool having an axis, comprising a drill head, a conveying helix adjoining the drill head and a chucking shank adjoining the conveying helix, the conveying helix having a flute web, the flute web having a face furthest from and parallel to the axis and a drilling-dust carrying surface, the drilling-dust carrying surface being disposed at a flank angle, wherein the flank angle is the angle between said face and the drilling-dust carrying surface, wherein the from a value less than 90°to a value greater than 90°and then to the initial value as viewed along said drilling-dusting carrying surface over one 360°turn about said axis.