Patents Assigned to Komet Praezisonswerkzeuge Robert Breuning GmbH
  • Patent number: 6030155
    Abstract: The invention concerns a drilling tool for machine tools. The drilling tool comprises a drill body with two chip-conveying grooves which are delimited at their flanks by helically curved ribs. Disposed at the end of the drill body is a drill head which comprises two segment parts, which are separated from each other by opposite axially aligned chip spaces, and two cutting plates which are each disposed in a recess in the segment parts in the region of an axially parallel radial chip-guide surface at different radial spacings from the drill axis with mutually partially overlapping working regions. At a transition point, the chip-guide surfaces merge into the flanks of the adjacent chip-conveying grooves. Disposed at at least one of the transition points is a transition surface which is gradually recessed so that it widens the cross-section of the chip space and merges into a flank of the adjacent chip-conveying groove.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: February 29, 2000
    Assignee: Komet Praezisonswerkzeuge Robert Breuning GmbH
    Inventors: Gerhard Scheer, Konstantin Baxivanelis