Drill-forming Or Sharpening Patents (Class 76/5.1)
  • Publication number: 20120079918
    Abstract: A device and associated methodology for producing longitudinal components of metal with helical grooves, in particular spiral drill bits or screws, is provided. The method is suited for mass production and improves the cost effectiveness of production. The method includes providing at least one cold forming stage in which a blank is inserted in a guide mold and cold formed in a split mold with at least two movable jaws. The inner wall of the jaws includes at least one section with a contour designed as a negative of the helical grooves. By a heading tool which is movable in axial direction and which engages the free end of the blank positioned in the guide mold, the blank is pressed at least partially through the central opening of the closed split mold. Thus, helical grooves are produced during the contact with the mold contour by plastical cold forming.
    Type: Application
    Filed: June 11, 2010
    Publication date: April 5, 2012
    Applicant: SIEBER FORMING SOLUTIONS GMBH
    Inventor: Hilmar Gensert
  • Patent number: 8091459
    Abstract: A method for manufacturing a rotary tool for chip removing machining with at least one chip flute that extends in the longitudinal direction of the tool. The method involves preparing a mixture of a cemented carbide, cermet or ceramics powder and a carrier, such as a polymer, and placing the mixture in an extruding machine. The mixture is extruded in a feed direction by means of a die to form the diameter of the mixture body. The mixture body passes against a chisel which forms a chip flute in the outer periphery of the mixture body by chip-removing machining. When the chisel is displaced away from the mixture body, a non-fluted shaft portion is formed. By rotating the mixture body while contacted by the chisel, a helical chip flute can be formed. Alternatively, the body could be twisted after a straight flute has been formed, whereupon the flute becomes helical.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: January 10, 2012
    Assignee: Sandvik Intellectual Property Aktiebolag
    Inventors: Jören Kugelberg, Roine Ericsson, Jonathan Fair, Anders Micski
  • Publication number: 20110036639
    Abstract: An earth boring drill bit that includes a cutting cone with a cutting disk. Compacts are inserted within the disk having a chisel shaped end set flush with the cutting disk periphery. The compact crests and cutting disk periphery form a generally seamless cutting surface. The cutting cone can further include cutting teeth thereon also having flush mounted compacts. The compacts can be made from a material such as cemented carbide, hardfacing, tungsten, tungsten alloys, tungsten carbide and the cutter made from steel.
    Type: Application
    Filed: August 13, 2009
    Publication date: February 17, 2011
    Applicant: Baker Hughes Incorporated
    Inventors: Robert J. Buske, James L. Overstreet, Thomas M. Stefanik, Shyam Anandampillai, Robert D. Bradshaw
  • Publication number: 20100272531
    Abstract: A cutting tool having a monolithic construction includes an injection molded shank, and an extruded fluted portion extending forwardly from the shank, the shank and the fluted portion having a monolithic construction. The process for making the cutting tool includes forming a cutting tool green body by injection molding a shank of the green body and extruding a fluted portion of the green body such that the shank and the fluted portion have a monolithic construction; and then sintering the cutting tool green body.
    Type: Application
    Filed: April 22, 2010
    Publication date: October 28, 2010
    Applicant: Iscar, Ltd.
    Inventor: Amos Shavit
  • Publication number: 20100065337
    Abstract: The present invention relates to a system and method for automated or “robotic” application of hardfacing to the surface of a steel-toothed cutter of a rock bit. In particular, the system incorporates a grounded adapter plate and chuck mounted to a robotic arm for grasping and manipulating a rock bit cutter beneath an electrical or photonic energy welding source, such as a plasma arc welding torch manipulated by a positioner. In this configuration, the torch is positioned substantially vertically and oscillated along a horizontal axis as the cutter is manipulated relative along a target path for the distribution of hardfacing. Moving the cutter beneath the torch allows more areas of more teeth to be overlayed, and allows superior placement for operational feedback, such as automatic positioning and parameter correction. In the preferred embodiment, sensors provide data to the control system for identification, positioning, welding program selection, and welding program correction.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 18, 2010
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: David K. Luce, Alan J. Massey, Kenneth E. Gilmore, Keith L. Nehring