Forging Patents (Class 76/5.4)
  • Patent number: 6540452
    Abstract: The invention relates to a drilling tool for machine tools and to a method for the production thereof. The drilling tool has at least one chip conveyor groove (16) and at least one functional channel (20). In order to produce the body of the drill (10), the wall of a tubular metal blank is simultaneously impinged upon by substantially radially oscillating form-giving forces in several forming sections spread over the periphery, moving in an axial direction along the surface of the blank, whereby at least one chip conveyor groove (16) is shaped and at least one functional channel (20) is formed. When the chip conveyor grooves (16) are formed on at least two interspaced forming sections in a peripheral direction in the wall of the blank (50), the parts of the wall in the area of two opposite-lying chip conveyor grooves (16) come to rest against each other in a sealed manner, defining at least two functional channels (20, 24) on the inner surfaces thereof.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: April 1, 2003
    Assignee: Komet Praezisionswerkzeuge Robert Breuning GmbH
    Inventors: Dietmar Bolkart, Gerhard Scheer, Konstantin Baxivanelis, Michael Koecher, Jacek Kruszynski