Patents Assigned to Kennametal Inc.
  • Patent number: 11117203
    Abstract: Holders are described herein providing secure clamping and/or positioning of cutting inserts. Briefly, a holder for a cutting insert comprises a base and a slot for receiving the cutting insert, wherein the slot forms an angle with the base ranging from 10 degrees to 60 degrees.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: September 14, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Igor Kaufmann, Raouf Benamor, John Musil, Shiva Pinnoju
  • Patent number: 11117208
    Abstract: In one aspect, composite preforms are provided for imparting wear resistance to superalloy articles. The composite preforms can be employed for metallurgically bonding alloy wear plates or pads to superalloy articles. A composite preform, in some embodiments, comprises a powder alloy composition comprising 1-30 wt. % nickel, 0.05-2 wt. % iron, 15-25 wt. % chromium, 10-30 wt. % molybdenum, 0-1 wt. % carbon, 1-5 wt. % silicon, 0.05-2 wt. % boron, 0-5 wt. % tungsten, 0-3 wt. % tantalum, 0-0.1 wt % manganese, 0-3 wt. % aluminum, 0-0.1 wt % yttrium and the balance cobalt.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: September 14, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Martin G. Perez, Michael Meyer, Robert W. Monds, Loretta M. Bell
  • Patent number: 11110524
    Abstract: A rotary cutting tool includes a replaceable cutting insert, a pocket portion for holding the cutting insert, and a chip flute portion having a plurality of helical flutes. An internal coolant passage is formed in the chip flute portion and has both a twisted geometry and a “see-through” central portion. The internal coolant passage is polygonal in cross-sectional shape having a number of cusps equal to the number of flutes. The internal coolant passage greatly increases coolant flow area, while maintaining the stiffness and rigidity of the cutting tool. A method includes forming the internal coolant passage using additive manufacturing such that the internal coolant passage has a “see-through” central portion and a twisted geometry.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: September 7, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Xiangdong D. Fang, Ruy Frota De Souza Filho, David J. Wills, Joe G. Slusarcyk, Manuel Wacinski
  • Publication number: 20210268591
    Abstract: A rotary cutting tool includes a tool body including a chip flute portion having a plurality of helical chip flutes separated by lobes. In one aspect, a tunable vibration absorber assembly is disposed within a cavity formed in the chip flute portion. In another aspect, the tunable vibration absorber assembly is disposed within a cavity of a replaceable cutting head. In each aspect, the tunable vibration absorber assembly includes at least two tunable absorber masses, a resilient material between the one or more absorber masses and the cavity, and one or more connecting members for preventing relative angular displacement of the one or more tunable absorber masses. The at least two tunable absorber masses are suspended only by the resilient material, thereby enabling the tunable vibration absorber assembly to be tuned to a desired frequency for suppressing torsional vibration of the rotary cutting tool during a cutting operation.
    Type: Application
    Filed: May 13, 2021
    Publication date: September 2, 2021
    Applicant: Kennametal Inc.
    Inventors: Ruy Frota de Souza Filho, Logan M. Semnisky
  • Patent number: 11090737
    Abstract: A rotary cutting tool includes a tool body including a chip flute portion having a plurality of helical chip flutes separated by lobes. In one aspect, a tunable vibration absorber assembly is disposed within a cavity formed in the chip flute portion. In another aspect, the tunable vibration absorber assembly is disposed within a cavity of a replaceable cutting head. In each aspect, the tunable vibration absorber assembly includes one or more tunable absorber masses, a resilient material between the one or more absorber masses and the cavity, and one or more connecting members for preventing relative angular displacement of the one or more tunable absorber masses. The one or more tunable absorber masses are suspended only by the resilient material, thereby enabling the tunable vibration absorber assembly to be tuned to a desired frequency for suppressing torsional vibration of the rotary cutting tool during a cutting operation.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: August 17, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Ruy Frota de Souza Filho, Logan M. Semnisky
  • Patent number: 11090736
    Abstract: A cutting insert includes a head portion having a number of cutting edges and a centering pin which is disposed about a central longitudinal axis and which is coupled to, and extends axially away from, the main head portion. The centering pin includes a recess structured to accommodate a portion of a setscrew. The recess includes: a first angled surface disposed generally facing away from a leading end of the centering pin at an acute first angle with respect to the longitudinal axis of the centering pin; and a second angled surface which is positioned opposing the first angled surface at an acute second angle with respect to the longitudinal axis of the centering pin.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: August 17, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Horst Manfred Jager, Ruy Frota De Souza Filho
  • Publication number: 20210220956
    Abstract: An indexable milling cutter includes a milling cutter body with a plurality of flutes and a plurality of seating surfaces adapted to mount a cutting insert thereon. The milling cutter body includes a plurality of coolant reservoirs in fluid communication with an adapter. In one aspect, each coolant reservoir lies along a circular intersection line of a coolant manifold. In another aspect, a longitudinal axis of each coolant reservoir is oriented at a non-zero angle, A, with respect to a central, longitudinal axis of the milling cutter. A plurality of coolant ducts in fluid communication with each coolant reservoir, each coolant duct having a smaller cross-sectional area than the coolant reservoir, provide multiple streams of coolant targeted at a plurality of specific critical cutting areas of the cutting insert.
    Type: Application
    Filed: January 22, 2020
    Publication date: July 22, 2021
    Applicant: Kennametal Inc.
    Inventors: Xiangdong D. Fang, Jean-luc D. Dufour
  • Patent number: 11065628
    Abstract: Wear resistant centrifuge tile assemblies include a backing portion and a wear-resistant tile. Wear resistant centrifuge tile assemblies are provided with self-fixturing features to provide a desired mounting position and to restrict movement of the wear-resistant tile with respect to the backing plate during bonding. The self-fixturing features provide the ability to perform repeatable and consistent bonding of the wear-resistant tile to the backing plate. The bonding of the wear-resistant tile to the backing plate can be performed with a braze material.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: July 20, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Robert J. Davison, Nathan G. Wood, Travis E. Puzz
  • Patent number: 11065863
    Abstract: In one aspect, particle powder compositions are provided for article manufacture by various additive manufacturing techniques. A powder composition comprises a particle component comprising sintered cemented carbide particles having apparent density of at least 6 g/cm3.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: July 20, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Paul D. Prichard, Gabriel B. Collins
  • Patent number: 11065862
    Abstract: Methods of making sintered articles from powder metal carbide compositions by additive manufacturing techniques are described herein. Sintered carbide articles fabricated by such additive manufacturing techniques, in some embodiments, exhibit densities equaling articles formed according to conventional techniques employed in powder metallurgy. For example, a method of manufacturing an article comprises providing sintered cemented carbide powder comprising a hard particle phase including tungsten carbide and a metallic binder phase and forming the sintered cemented carbide powder into a green article by one or more additive manufacturing techniques. The green article is sintered to provide a sintered article having density greater than 90% theoretical full density, wherein the green article has a density less than 50% theoretical full density prior to sintering.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: July 20, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Pantcho Stoyanov, Paul Prichard
  • Publication number: 20210162516
    Abstract: A rotary cutting tool includes a cutting head having a plurality of insert-receiving pockets for radially mounting a first type of cutting insert in a first cutting region and for tangentially mounting a second type of cutting insert in a second cutting region. The first cutting region has a first length, L1, and the second cutting region has a second length, L2, that is greater in magnitude than the first length, L1. The two types of cutting inserts provides a hybrid cutting insert design in which the first type of cutting inserts provide an increased chip gash volume for effective chip evacuation, and the second type of cutting inserts provide an increased core diameter to minimize deflection of the rotary cutting tool.
    Type: Application
    Filed: December 2, 2019
    Publication date: June 3, 2021
    Applicant: Kennametal Inc.
    Inventors: Lance David Brunetto, Ruy Frota de Souza Filho, Ronald Louis Dudzinsky
  • Patent number: 11021775
    Abstract: In one aspect, cobalt-based alloys are described herein comprising composition and microstructure permitting a balance of hardness, toughness and wear resistance desirable for wood cutting applications. A cobalt-based alloy comprises a chromium rich carbide phase in an amount of 15-30 volume percent, a tungsten-rich phase in an amount of 9-15 volume percent and a balance of cobalt-rich solid solution matrix comprising nickel, chromium, vanadium and tungsten.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: June 1, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Matthew Yao, Abdelhakim Belhadjhamida, Brad McLane
  • Patent number: 11000905
    Abstract: An improved adapter sleeve is submitted which has a shank for insertion into a toolholder for a machine tool, wherein a tool socket for holding a tool is formed in the shank, wherein a number of slots are disposed along the shank so that the shank can be compressed during clamping, wherein a cutting head is formed which is arranged on a front side (F) of the shank. In one embodiment, the cutting head has an insert seat for a cutting insert.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 11, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Josef Konrad Herud, Marcus Paul
  • Patent number: 11000921
    Abstract: Welding rods and associated cladded articles are described herein. Briefly, a welding rod comprises a hard particle component dispersed in a nickel-based alloy matrix or cobalt-based alloy matrix, the hard particle component comprising tungsten carbide particles having an average size of less than 45 ?m, and the nickel-based alloy matrix or the cobalt-based alloy matrix comprising at least one metal carbide forming element.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: May 11, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Robert J. Vasinko
  • Patent number: 10982313
    Abstract: A coated body having a substrate and a wear-resistant coating applied to the substrate by physical vapor deposition, the coating comprising a main layer applied to the substrate in a thickness of 1 to 10 ?m, wherein said main layer is formed from a nitride of aluminum and at least one other metal from the group consisting of Ti, Cr, Si, Zr and combinations thereof; and a cover layer adjacent to the main layer at a thickness of 0.1 to 5 ?m, wherein the cover layer comprises at least one alternating layer consisting of an oxynitride layer and a nitride layer arranged over the oxynitride layer, wherein the oxynitride layer is formed from an oxynitride of aluminum and optionally further metals from the group consisting of chromium, hafnium, zirconium, yttrium, silicon and combinations thereof, and the nitride layer is formed from a nitride of aluminum and at least one other metal from the group consisting of Ti, Cr, Si, Zr and combinations thereof.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: April 20, 2021
    Assignees: KENNAMETAL INC., OERLIKON SURFACE SOLUTIONS AG, PFÄFFIKON
    Inventors: Volker Derflinger, Joern Kohlscheen
  • Patent number: 10967466
    Abstract: Methods of superalloy article repair are provided. In some embodiments, a method for repairing a nickel-based superalloy article comprises providing a layered assembly over a damaged region of the nickel-based superalloy article, the layered assembly comprising a nickel-based superalloy preform, an infiltration alloy preform and a melting point depressant component. The layered assembly is heated to form a nickel-based filler alloy metallurgically bonded to the damaged region, wherein primary carbide and secondary carbide phases are present in the nickel-based filler alloy in a combined amount of 0.5 to 10 vol. %.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 6, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Michael Meyer, Martin G. Perez, Abdelhakim Belhadjhamida
  • Patent number: 10968512
    Abstract: In one aspect, articles are described comprising wear resistant coatings employing composite architectures including refractory layers of varying compositions and phases. Briefly, a coated article comprises a substrate and a coating deposited by chemical vapor deposition (CVD) adhered to the substrate, the coating comprising an inner refractory layer comprising M1-xAlxN wherein x?0.7 and M is titanium, chromium or zirconium and an outer zirconia layer or outer multiphase refractory layer comprising an alumina phase and an oxide phase comprising at least one Group IVB metal, wherein the M1-xAlxN has less than 15 weight percent hexagonal phase.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: April 6, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Debangshu Banerjee, Rodrigo Cooper
  • Patent number: 10967438
    Abstract: A collet includes an axially rearward end and an axially forward end; a nose portion; a body portion having an outer surface and an inner surface for engaging a shank of a tool; a plurality of slots extending from the inner surface to the outer surface; and a plurality of coolant channels disposed within the collet between the plurality of longitudinally extending slots and extending entirely from the axially rearward end to the axially forward end of the collet. Slots include a first slot extending from the axial forward end to within an intermediary zone, a second slot extending from the axial rearward end to at least the tool holder engagement zone such that the second slot does not intersect the first slot, and a third slot from within the tool engagement zone to within the intermediary zone such that the third slot circumferentially overlaps the first and second slots.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: April 6, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Alan J. Bookheimer, Ruy Frota de Souza Filho
  • Patent number: 10960502
    Abstract: A reaming tool includes a tool body having an axially rearward shank portion and an axially forward cutting portion, the forward cutting portion having at least one peripherally arranged cutting insert. The reaming tool also includes an inlet coolant channel formed in the tool body and an inlet opening at an axially rearward end of the shank portion. An outlet coolant channel is formed in the tool body and is in fluid communication with the inlet coolant channel, wherein the outlet coolant channel defines an outlet opening proximate to the cutting insert. In one particular aspect, at least a portion of the outlet coolant channel is non-linear. A method of making a component of the reaming tool by performing a printing operation on a substrate to form the component is also provided.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: March 30, 2021
    Assignee: KENNAMETAL INC.
    Inventor: Li Ning
  • Patent number: D914777
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: March 30, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Robert J. Davison, Nathan G. Wood, Travis E. Puzz