By Shot Peening Or Blasting Patents (Class 29/90.7)
  • Patent number: 9956613
    Abstract: A sliding member having a hardness proper for an environment where a high-pressure is applied and having a good abrasion resistance. A sliding member 1 comprises a first sintered compact layer 2 formed by solidifying an iron-based metallic powder with a sinter; and a second sintered compact layer 3 formed by solidifying a copper-based metallic powder on a surface of the first sintered compact layer 2 to improve a sliding characteristic. The second sintered compact layer 3 is densified by a blast process where the powder is collided against a surface of the second sintered compact layer 3.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: May 1, 2018
    Assignee: Senju Metal Industry Co., Ltd.
    Inventors: Satoshi Masuda, Naoki Sato, Ryoichi Kurata
  • Patent number: 9783877
    Abstract: Systems and methods in accordance with embodiments of the invention implement bulk metallic glass-based macroscale compliant mechanisms. In one embodiment, a bulk metallic glass-based macroscale compliant mechanism includes: a flexible member that is strained during the normal operation of the compliant mechanism; where the flexible member has a thickness of 0.5 mm; where the flexible member comprises a bulk metallic glass-based material; and where the bulk metallic glass-based material can survive a fatigue test that includes 1000 cycles under a bending loading mode at an applied stress to ultimate strength ratio of 0.25.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: October 10, 2017
    Assignee: California Institute of Technology
    Inventors: Douglas C. Hofmann, Gregory Agnes
  • Patent number: 9517545
    Abstract: The present invention is about the design and manufacturing method of constructing nano-structured lattices. The design of the four periodic two-dimensional lattices (hexagonal, triangulated, square and Kagome) is described; and the process of making nano-structured lattices is outlined in the present invention.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: December 13, 2016
    Assignee: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Jian Lu, Phu Son Mai, Chun Sheng Wen
  • Patent number: 9126308
    Abstract: A large table 30 is rotatably disposed at a position within an area that includes a projected area toward which shot is projected and a non-projected toward which no shot is projected. A plurality of small tables 32 are disposed on the large table 30. Each of the small tables 32 has a rotating shaft 33 that is parallel to the rotating shaft 31 of the large table 30. Thereby each of the small tables 32 can rotate. Workpieces 12 are placed on the small tables 32. A centrifugal projector 20 centrifugally accelerates shot to project it toward the workpieces 12 on the small tables 32. Each of the workpieces 12 on the small tables 32 is pressed down from above by the holding member 48 of the holding mechanism 46. The holding member 48 can rotate along with the workpiece 12.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: September 8, 2015
    Assignee: SINTOKOGIO, LTD.
    Inventor: Masatoshi Yamamoto
  • Patent number: 9056386
    Abstract: The present invention aims to provide a method of shot-peening treatment that substantially improves the durability (particularly, heat check resistance) of the treated surface of the steel products in the process of treating by shot peening (hereafter, “SP”) the surface of the steel product that is the work to be treated and that was treated by heat hardening. The SP treatment of the present invention that gives the SP treatment to the steel product that was heat-treated and that is a work to be treated comprises the first SP treatment that removes the compound layer (white layer) and a second SP treatment that gives compressive residual stress to the first SP treated surface that was treated by the first SP treatment where the second SP treatment is carried out only to the products where it has been proved by the non-destructive inspection that the compound layers are removed by the first SP treatment.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: June 16, 2015
    Assignee: SINTOKOGIO, LTD.
    Inventor: Yuji Kobayashi
  • Patent number: 8955225
    Abstract: In forming an actuator, a large end surface of a tapered roller of a tapered roller bearing is shot with minute particles of silicon carbide having a diameter of 0.5 to 100 ?m and having an angle formed by crushing, and such a surface is scraped concavely at a diameter within a range from 0.5 to 100 ?m to form a large number of concavities having a depth of equal to or greater than 1 ?m at a pitch of equal to or less than 200 ?m. The concavities are non-continuous and isolated from each other, and serve as a lubricant puddle. The concavities are formed by scraping and not by plastic deformation, and thus the surface is not hardened.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: February 17, 2015
    Assignee: NSK Ltd.
    Inventors: Masato Kobayashi, Tomoharu Saito, Shinji Fujita, Takanori Tanaka
  • Patent number: 8943659
    Abstract: A method and device for the surface peening, especially ultrasonic shot-peening, of at least one partial element of a component of a gas turbine, is disclosed. The partial element, e.g., a sealing fin, and at least one surface of a vibration device impinging the blasting material are positioned relative to each other at an angle between 70° and 90° based on the direction of extension of the sealing fin.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: February 3, 2015
    Assignee: MTU Aero Engines GmbH
    Inventors: Erwin Bayer, Max Niegl, Holger Polanetzki, Thomas Peschke, Thomas Dautl, Philipp Thuemmler
  • Patent number: 8936236
    Abstract: A manufacturing method of a coil spring for an automobile suspension includes forming a material into a coil shape; performing a heat treatment step on the material; performing a warm shot peening step on the material, and performing a hot setting step on the material. By performing the warm shot peening step prior to the hot setting step, a stronger compressive residual stress is imparted in a direction along which a large tensile stress acts during actual use of the coil spring, thereby improving sag resistance and durability of the coil spring. A coil spring is also manufactured according to this method.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: January 20, 2015
    Assignee: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Tomohiro Nakano, Takayuki Sakakibara, Takanori Kuno, Shingo Mimura, Masami Wakita
  • Patent number: 8931318
    Abstract: A device for surface-peening, especially for the ultrasound shot-peening of a component of a gas turbine, having at least one vibration means that comprises a surface that propels the peening material, and having a holding means with which a surface area of the component and the surface of the vibration means can be arranged with respect to each other is disclosed. In this context, the angular position of the surface of the at least one vibration means can be adjusted relative to the surface area of the component of the gas turbine. Moreover, a method is provided in which the angular position of the surface of the at least one vibration means can be adjusted relative to the surface area of the component.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 13, 2015
    Assignee: MTU Aero Engines GmbH
    Inventors: Erwin Bayer, Max Niegl, Martin Bussmann, Thomas Peschke
  • Patent number: 8893538
    Abstract: Uniform nano-scale microstructures can be reliably formed on the surface layer of this metal product while still improving the surface roughness and make the surface layer robust enough not to disappear due to wear. The surface of the metal product is repeatedly subjected to instantaneous rapid heating and rapid cooling by intermittently ejecting onto the surface of the metal product shot with a mixture of three or more approximate but different particle sizes for a high ejection density, thereby forming uniform microstructures near the surface of the metal product and forming micro-diameter dimples in the metal surface.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: November 25, 2014
    Assignee: Fuji Kihan Co., Ltd.
    Inventor: Yoshio Miyasaka
  • Patent number: 8852362
    Abstract: There is provided an austenitic stainless steel pipe excellent in steam oxidation resistance. The austenitic stainless steel pipe excellent in steam oxidation resistance contains, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, and is configured so that a region satisfying the following Formula exists in a metal structure at a depth of 5 to 20 ?m from the inner surface of the steel pipe: (?/?)×?/?×100?0.3 where the meanings of symbols in the above Formula are as follows: ?: sum total of the number of pixels of digital image in region in which orientation difference of adjacent crystals detected by electron backscattering pattern is 5 to 50 degrees ?: the number of total pixels of digital image in region of measurement using electron backscattering pattern ?: analysis pitch width of electron backscattering pattern (?m) ?: grain boundary width (?m).
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: October 7, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yoshitaka Nishiyama, Mitsuru Yoshizawa, Masahiro Seto, Katsuki Tanaka
  • Patent number: 8834126
    Abstract: A method for protecting a fan blade with an airfoil, a tip, a root and a sheath, the root to be inserted into a hub includes peening the airfoil of the blade; inserting a scrim cloth between the fan blade and the sheath to galvanically isolate the fan blade from the sheath; bonding the sheath to the blade with an epoxy adhesive; peening the blade root; bonding wear pads to the root with epoxy adhesive to galvanically isolate the root from the hub; applying a protective cover to the tip of the blade; and applying a coating to all exposed areas of the blade to inhibit corrosion.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: September 16, 2014
    Assignee: United Technologies Corporation
    Inventors: James O. Hansen, Joseph Parkos, Thomas J. Watson, Christopher J. Hertel, Kelly L. Hoover
  • Patent number: 8739589
    Abstract: For surface strengthening of blisk blades, a blade area of the blisk is completely inserted into a water bath (13), and a multitude of high-pressure water jets are injected into the water bath which are directed bilaterally and essentially vertically—and opposite to each other—to both blade sides. Cavitation bubbles imploding near the blade surface that are generated in the water bath on the periphery of the high-pressure water jets to produce micro jets upon imploding, exerting an effect on the blade surface, creating plastically formed depressions without sharp edges. An apparatus for performing the method includes a container (3), a jetting unit (6) having parallel spaced apart water-jet tubes (4) with nozzle openings connected to a high-pressure water conduit (5) to produce the high-pressure water jets.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: June 3, 2014
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventors: Wolfgang Hennig, Goetz G. Feldmann
  • Publication number: 20140090222
    Abstract: There is disclosed a high-hardness atomized powder comprising in mass %: 2 to 8% of B; and one or two or more of Ti, Cr, Mo, W, Ni, Al, and C in an amount satisfying the following expression: 0?(Ti %/10)+(Cr %/25)+(Mo %/10)+(W %/6)+(Ni %/10)+(Al %10)+(C %/1)?1.00, the balance being Fe and unavoidable impurities, and having a particle diameter of 75 ?m or less. The powder, which has high hardness and is inexpensive, is particularly suitable for a powder for a projecting material for shot peening.
    Type: Application
    Filed: March 23, 2012
    Publication date: April 3, 2014
    Applicant: SANYO SPECIAL STEEL CO., LTD.
    Inventor: Toshiyuki Sawada
  • Patent number: 8650920
    Abstract: A method and device for surface peening, particularly ultrasonic shot peening, of a component in the region of a passage opening is disclosed. A vibration device impinging the blasting material is disposed on one side and a counter-element is disposed on an opposite side relative to a component region having the passage opening. The counter-element is disposed at a distance relative to the corresponding side of the component region.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: February 18, 2014
    Assignee: MTU Aero Engines GmbH
    Inventors: Erwin Bayer, Eggert Reese, Juergen Steinwandel
  • Patent number: 8627695
    Abstract: A method for ultrasound shot-blasting by a cloud of balls set in motion through contact with a sonotrode having one metallic surface including an area of difficult access, characterized in that the surface is that of a hook axially restrained on a turbomachine blade including a groove provided between the hook and the base of the blade, and the cloud of balls is contained in a chamber encompassing the groove and the surface portion outside the groove.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: January 14, 2014
    Assignee: SNECMA
    Inventor: Ana Viguera Sancho
  • Patent number: 8613211
    Abstract: A shot peening apparatus 1 includes: a storage container 2 that stores therein shots B impacting on a shot-peening treated region U; a vibrator 5 that accelerates the shots B; a shot outlet 4 that is formed on the storage container 2, and connected to a shot collecting passage 10 through which the shots B in a container inside 2I are collected, and through which the shots B are taken out from the container inside 2I into the shot collecting passage 10; and a shot inlet 3 that is formed on the storage container 2, and connected to a shot supplying passage 9 through which the shots B are supplied into the container inside 2I, and through which the shots B are supplied into the container inside 2I from the shot supplying passage 9.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 24, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Jun Fujita, Takeshi Yamamoto, Atsushi Kamiyoshi, Mitsuru Handa, Yoshihiro Watanabe, Kanehisa Hattori, Shogo Sasaki
  • Patent number: 8607604
    Abstract: A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: December 17, 2013
    Assignee: Mitsubishi Heavy Industries
    Inventors: Norikazu Tezuka, Kazuharu Hirokawa, Keisuke Ihara, Kei Osawa, Hiroshi Ishikawa, Taiji Torigoe, Ryuichi Yamamoto, Yukihiro Hashimoto, Nobuyuki Izutsu, Koji Takahashi
  • Patent number: 8607605
    Abstract: A spring wire is subjected to a first shot peening process and a second shot peening process. In the first shot peening process, a first shot is projected on the spring wire at a first projectile speed. High kinetic energy of the first shot produces compressive residual stress in a region ranging from the surface of the spring wire to a deep position. In the second spring wire process, a second shot is projected at a second projectile speed lower than the speed of the first shot. The kinetic energy of the second shot is lower than that of the first shot. The low kinetic energy of the second shot increases the compressive residual stress in a region near the surface of the spring wire.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: December 17, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventors: Akira Tange, Hideki Okada, Motoi Uesugi, Yosuke Hisano
  • Patent number: 8578745
    Abstract: The invention relates to a peening device for peening a component with a part to be peened and a part not to be peened. The peening device comprises a chamber with at least one opening located therein, wherein the opening is dimensioned in such a manner that the part not to be peened of the component can be guided there through, and a fixture for retaining the component which features a section which entirely covers the opening of the chamber when the part not to be peened is at least partially guided into said opening, and said section completely encloses the part not to be peened of the component between the adjacent region of the part to be peened of the component and the opening.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: November 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Berndt, Helge Reymann
  • Publication number: 20130209309
    Abstract: Provided are a magnesium alloy sheet having improved formability at room temperature and a method for manufacturing same. According to one embodiment of the present invention, the method for manufacturing the magnesium alloy sheets having improved formability at room temperature is characterized by comprising a first pretreatment step of applying residual compression stress to the surface the magnesium alloy raw material.
    Type: Application
    Filed: August 29, 2011
    Publication date: August 15, 2013
    Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Young Seon Lee, Yong Nam Kwon, Seong Hoon Kang, Kwang Seok Lee, Dae Yong Kim, Ji Hoon Kim, Sang Woo Kim
  • Patent number: 8499597
    Abstract: A device for surface peening, in particular for ultrasonic shot peening, of a component of a gas turbine, having at least one vibration device that includes a surface that impinges the blasting material, and having a holding device by which a surface area of the component can be positioned relative to the surface of the vibration device, the surface of the vibration device being subdivided into at least two adjacent partial surfaces, each including an overlapping part by which a part of the surface area of the component can be treated by blasting material impinged both by the one and by the other partial surface.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: August 6, 2013
    Assignee: MTU Aero Engines GmbH
    Inventors: Erwin Bayer, Max Niegl, Holger Polanetzki, Thomas Peschke, Thomas Dautl, Philipp Thümmler
  • Publication number: 20130189905
    Abstract: A method for improving the strength characteristics of orthopedic prostheses, such as femur necks, femoral stems, cotyloid elements, systems of the spinal column, including the step of: starting from a prosthesis made of metal, subjecting the prosthesis to a peening treatment to improve the surface hardness of the prosthesis and eliminate micro-scoring caused by the machining of machine tools, the method further including a subsequent step of performing a surface finishing treatment by vibration finishing.
    Type: Application
    Filed: August 2, 2011
    Publication date: July 25, 2013
    Applicants: ADLER ORTHO S.R.L.
    Inventors: Aldo Toni, Patrizio Cremascoli
  • Patent number: 8468862
    Abstract: A process for treating a surface of a component to improve its surface finish and induce residual compresses stresses in a near-surface region of the component. The process entails performing a first peening operation to form residual compressive stress layers in the near-surface region of the component, and then performing at least a second peening operation to cause surface smoothing of the surface of the component while retaining residual compressive stresses in the near-surface region of the component. The first peening operation comprises wet glass bead peening at a first intensity with a first glass bead media, and the second peening operation comprises wet glass bead peening at a second intensity with a second glass bead media, wherein the second intensity is lower than the first intensity and the second glass bead media is smaller than the first glass bead media.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: June 25, 2013
    Assignee: General Electric Company
    Inventor: Swami Ganesh
  • Patent number: 8453305
    Abstract: The present invention is directed to a method and apparatus for processing a metallic gear comprising providing a gear, directing a first peening media at the metallic gear thereby exposing a plurality of surfaces on the metallic gear to the first peening media whereby the strength and wear properties of the teeth roots of the gear are enhanced, directing a second peening media at the metallic gear thereby exposing a plurality of surfaces on the metallic gear to the second peening media whereby the KSI of the surface of the gear is enhanced, providing a container, placing a fine finishing medium in the container, placing the gear with the fine finishing medium in the container, coupling vibrations to the container to vibrate the fine finishing medium with the wetted gear, removing the gear from the container, washing the gear and rinsing the gear with rust inhibitor.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: June 4, 2013
    Assignee: Engineered Abrasives, Inc.
    Inventor: Michael J. Wern
  • Patent number: 8418332
    Abstract: Surface texturing is employed to modify the topography of one or more surfaces (radial or cylindrical) of the bearing system for a roller cone rock bit. The surface texturing results in a dimpled surface which retains additional lubricant helpful in reducing friction in the boundary and mixed lubrication regimes. Shot peening is disclosed as one method for texturing the desired surface.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: April 16, 2013
    Assignee: Varel International Ind., L.P.
    Inventor: Xiaobin Lu
  • Patent number: 8375542
    Abstract: When manufacturing slender metallic components (9) by cutting shaping from pre-manufactured forgings (1), the respective component (9) upon finish machining by cutting is dimensionally inspected to determine deformations (a) induced by manufacture, as compared to the nominal position, and on the basis of the measuring result the position of tensile stress areas (4) in rim layers of the component (9) is determined. For positionally balancing the component (9), the tensile stress areas (4) causing deformation of the component (9) are subjected to controlled shot peening at a specified intensity.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: February 19, 2013
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Rainer Mielke
  • Publication number: 20130004317
    Abstract: A method of making a turbine rotor is disclosed. The method includes forming a last stage disk preform having a disk axis, the preform having a rotor face and an opposed shaft face, the rotor face having a circumferential, axially-extending rotor rib protruding therefrom, the shaft face having a circumferential, axially-extending shaft rib protruding therefrom, the disk preform comprising a disk preform material. The method also includes joining the rotor rib to a rotor preform to form a rotor joint, the rotor preform comprising a rotor preform material. The method further includes joining the shaft rib to a shaft to form a shaft joint, the shaft comprising a shaft material, wherein the disk preform material is different than the rotor preform material and the shaft material.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Swami Ganesh, Steven Louis Breitenbach, Robin Carl Schwant
  • Patent number: 8332998
    Abstract: A method of shot peening in which with respect to a carburized and quenched metal part, only its surface abnormal layer detrimental to the fatigue strength thereof is scraped without scraping of the martensitic structure underlying the surface abnormal layer, namely, in which the fatigue strength can be rendered stable and enhanced without surface cracking. As bombardment shot, use is made of a shot with hardness higher than that (first hardness) of the surface abnormal layer occurring at a surface layer portion of metal part prior to shot peening but lower than that (second hardness) of the martensitic structure.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: December 18, 2012
    Assignee: Sintokogio, Ltd.
    Inventor: Yuji Kobayashi
  • Patent number: 8322004
    Abstract: A metallic fuel system component includes an internal surface and an external surface. The metallic fuel system component is made by inducing compressive residual stress in only a portion of the internal surface of the metallic fuel system component by transmitting a laser shock wave through the metallic fuel system component from the external surface to the internal surface.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 4, 2012
    Assignee: Caterpilar Inc.
    Inventors: Stephen R. Lewis, Alan R. Stockner, Dennis H. Gibson, Marion B. Grant, Jr., Avinash R. Manubolu
  • Patent number: 8317943
    Abstract: Disclosed is a ball for a constant velocity joint, and a method for producing the same. The ball for a constant velocity joint is produced via a quenching step for heating a spherical body consisting of a material corresponding to a high carbon chromium bearing steel regulated by Japanese Industrial Standards (JIS) to 840-900° C. and then cooling the spherical body under such a condition as 10-25 vol. % of austenite remains up to a first part where the depth from the surface is 0.1 mm, a step for tempering the spherical body at 150° C. or more, and a step for shot peening the spherical body and imparting a compression residual stress of ?1000 MPa or more to a region reaching second part where the depth from the surface is 0.2 mm.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: November 27, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takafumi Murakami, Naoto Shibata, Shunta Osako
  • Patent number: 8308150
    Abstract: A spring wire with hardness of 50 to 56 HRC is subjected to first and second shot peening processes within a warm working temperature range of 150 to 350° C. In the first shot peening process, the first shot of a shot size of 1.0 mm or more is used. In the second shot peening process, the second shot smaller in shot size than the first shot is used. Through these shot peening processes, compressive residual stress is imparted to the spring wire. The spring wire includes a residual stress increase part, residual stress peak part, and residual stress decrease part. In the residual stress decrease part, a part including the compressive residual stress magnitude of which is equivalent to the magnitude of the compressive residual stress at the surface of the spring wire exists at a position at a depth exceeding the permissible pit depth.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 13, 2012
    Assignee: NHK Spring Co., Ltd.
    Inventors: Akira Tange, Hideki Okada, Isao Sumiyoshi, Mitsuhiro Sugiyama
  • Patent number: 8252130
    Abstract: Surface processing of titanium alloy members for aerospace equipment imparts high wear resistance, lubricity and high fatigue strength. The method includes an oxygen diffusion step for causing oxygen to diffuse and penetrate in solid solution form into a surface of a titanium alloy member under an oxygen-containing gas atmosphere and a particle bombardment step for bombarding the surface of the titanium alloy member with an airflow containing particles. The aerospace equipment can include a flap rail member and slat rail member for aircraft.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: August 28, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuyuki Oguri, Takashi Kimura, Takahiro Sekigawa, Takayuki Takahashi
  • Patent number: 8151613
    Abstract: The object of the present invention is to provide a method for shot peening by which a compressive residual stress that is higher than any achieved by the conventional method can be achieved while the thickness of the processed material that is scraped is suppressed. The method is characterized in that the shot materials are shot against the processed material that has the hardness of 750 HV or more that is calculated from equations (1) to (3) below. The shot materials have Vickers hardness that is higher than the hardness of the processed material by 50 HV to 250 HV. The thickness of the processed material that is to be scraped is suppressed to 5 ?m or less. HV(m)={f(C)?f(T,t)}(1??R/100)+400×?R/100??Equation (1) f(C)=?660C2+1373C+278??Equation (2) f(T,t)=0.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: April 10, 2012
    Assignee: Sintokogio, Ltd.
    Inventors: Ryohei Ishikura, Takashi Kano, Makio Kato, Yuji Kobayashi, Satoru Ujihashi, Kiyoshi Okumura
  • Patent number: 8113025
    Abstract: Impact consolidated powders form deposits that are densified by substantially simultaneous shot peening of the impact consolidated powder.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: February 14, 2012
    Inventors: Ralph M. Tapphorn, Howard Gabel
  • Patent number: 8091192
    Abstract: A device for surface blasting, e.g., for ultrasonic shot blasting, components, e.g., gas turbine components, includes at least one vibrator having an oscillating surface, e.g., having at least one ultrasonic sonotrode, the or each oscillating surface of the or each vibrator being adjoined by a machining chamber for receiving a section to be blasted of the component to be machined. The machining chamber is bounded in its cross-section by at least three sides, e.g., by at least two substantially vertical sides and by at least one substantially horizontal side. At least the substantially vertical sides of the machining chamber are formed by oscillating surfaces of in each case one vibrator.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: January 10, 2012
    Assignee: MTU Aero Engines GmbH
    Inventors: Erwin Bayer, Thomas Dautl, Thomas Peschke, Holger Polanetzki
  • Patent number: 8051565
    Abstract: A method of reducing crack propagation in an airfoil includes: providing an airfoil having a root spaced apart from a tip, spaced-apart leading and trailing edges, a suction side extending from the leading edge to the trailing edge, and an opposed pressure side extending from the leading edge and the trailing edge, supporting the airfoil against bending loads; and burnishing the airfoil using a burnishing element, so as to create at least one burnished section of residual compressive stress, the at least one burnished section being located adjacent the leading edge and spaced from the leading edge by an offset distance selected so as to avoid deformation of the leading edge.
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: November 8, 2011
    Assignee: General Electric Company
    Inventors: Alberto Luna, Joshua Leigh Miller, William Terence Dingwell, Michael Jay Brunck, William Lee Imhoff, Paul Moncelle, Dale Robert Lombardo, Andrew Philip Woodfield
  • Patent number: 8034198
    Abstract: The present invention relates to an austenitic stainless steel tube for boiler, used for superheater or reheater in thermal power plant, giving excellent resistance to high temperature steam oxidation, in particular to an austenitic stainless steel tube containing 16 to 20% Cr by weight, and being cold-worked at the inner surface of the tube. The Cr concentration in the vicinity of the inner surface of the steel tube is 14% by weight or larger, and the hardness at 100 ?m depth from the inner surface of the steel tube is 1.5 times or larger the average hardness of the mother material or is HV 300 or larger.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: October 11, 2011
    Assignee: NKK Tubes
    Inventors: Yusuke Minami, Hitoshi Iijima, Motohisa Yoshida, Toshihiko Fukui, Tatsuo Ono
  • Patent number: 8024846
    Abstract: A method for preparing a surface includes providing an article having an article surface, thereafter first processing the article surface to establish a first residual compressive stress state and a first surface roughness in the article surface, and thereafter second processing the article surface by surface compressive texturing to establish a second residual compressive stress state and a second surface roughness in the article surface. The second surface roughness is quantitatively less than the first surface roughness, and substantially no material is removed from the article surface in the step of second processing.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: September 27, 2011
    Assignee: General Electric Company
    Inventors: Alberto Luna, Jeffrey F. Wessels, Dale R. Lombardo
  • Patent number: 8020295
    Abstract: Gas turbine engines systems and related methods involving dimensionally restored fasteners are provided. In this regard, a representative method for dimensionally restoring a mechanical fastener for a gas turbine engine includes: providing a mechanical fastener; and relocating existing material of the fastener such that a dimension of the fastener is restored.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: September 20, 2011
    Assignee: United Technologies Corp.
    Inventors: Derek W. Anderson, Allen W. Brown
  • Patent number: 7992416
    Abstract: Ultrasonic peening treatment is desirable where an application of a compressive stress is helpful to reduce the incidence of crack formation on highly stressed parts. Ultrasonic peening treatment can be performed in field applications without requiring a rotor to be removed from the machine. The system includes an acoustic element that excites peening media within a peen chamber. A frame is attachable to an assembled turbine rotor component and includes support structure engageable with the acoustic element. The frame is cooperable with a chamber tooling that defines and encloses the peen chamber together with the turbine rotor component.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: August 9, 2011
    Assignee: General Electric Company
    Inventors: Raymond Joseph Stonitsch, Diane Marie Beagle, Jean-Michel Duchazeaubeneix, Patrick Cheppe, Philippe Jacob, Vincent Desfontaine
  • Patent number: 7987569
    Abstract: A high performance main bearing cap has particular surfaces densified for improved fatigue crack resistance. The surfaces densified are the bolted face inside of a perimetral margin and outside of bolt head interface areas around the main bolt holes, the surfaces of the main bolt holes and the side bolt hole threads. Preferred methods of densification are single needle programmable pattern peening of the bolted face peened area, over-burnishing of the bolt holes, and forming the threads rather than cutting them for the side bolt threads.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: August 2, 2011
    Assignee: GKN Sinter Metals, LLC
    Inventors: Terry M. Cadle, Susan M. Cadle, legal representative, Joel H. Mandel, Donald J. Phillips
  • Patent number: 7984537
    Abstract: Both the inner and outer circumferential surfaces of a coil spring are peened by passing sequential segments of the spring around offset pulleys mounted within a peening cabinet. As the spring is pulled around one of the pulleys, the coils fan out from the pulley to permit the peening media to impact portions of the inner and outer circumferential surfaces of the spring, and as the spring is pulled around the other pulley, the portions of the surfaces not peened as the segment traveled around the first pulley will be peened.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: July 26, 2011
    Assignee: Electronics Inc.
    Inventor: Jack Champaigne
  • Patent number: 7966856
    Abstract: Solutions for robotic fastener peening in turbine machines are disclosed. In one embodiment, an apparatus includes: a peening machine having a peening head; a robotic apparatus including: a robotic arm coupled to the peening machine; and a base member coupled to the robotic arm, the base member mounted independently of the machine element; a vision system for locating a fastener on the machine element; and a control system coupled to the vision system, the peening machine and the robotic apparatus, the control system configured to control movement of the robotic apparatus and the peening machine based upon vision system data and spatial information about the fastener and the machine element.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 28, 2011
    Assignee: General Electric Company
    Inventors: Salahuddin Razi, Brian D. Albin
  • Patent number: 7950121
    Abstract: A method for rounding edges of parts, in particular of turbo engines, is disclosed. An edge to the surfaces is rounded, the edge being created by at least two adjacent surfaces of the part. A blasting jet consisting mostly of abrasive particles is directed at its center approximately tangentially to the angle bisecting line between the surfaces at the edge and is moved at a defined rate of advance in relation to the part along the edge such that there is a defined removal of material of the part with rounding toward the surfaces.
    Type: Grant
    Filed: March 20, 2004
    Date of Patent: May 31, 2011
    Assignee: MTU Aero Engines GmbH
    Inventor: Klemens Werner
  • Patent number: 7946009
    Abstract: A method of manufacturing a vehicle suspension component, such as a helical coil spring, includes the step of rotating a first impeller to project ceramic peening media in a first direction toward the vehicle suspension component to peen a surface section of the vehicle suspension component. In one example, the vehicle suspension component is peened with metal peening media before peening with the ceramic peening media.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: May 24, 2011
    Assignees: MSSC US, Saint-Gobain Centre de Recherche Et d'Etudes Europeen
    Inventors: Jeffrey Paul Dixon, James Hall, Ryan Versluis, Joseph A. Fader, Francois-Xavier Abadie
  • Publication number: 20110107571
    Abstract: A peening device suitable for peening annular weld zones inside undersea pipes, the device comprising at least one peening tool, with at least one hammer actuated to perform radial reciprocating movement in translation for peening against the inside surface of the pipe and/or said weld, wherein: said peening tool has a single hammer; and said hammer is pivotally mounted so as to be capable of varying its angle of inclination relative to the surface for peening; and said device includes a carriage suitable for moving in axial longitudinal translation XX inside a pipe and for supporting means for moving said peening tool in longitudinal and radial translation, and in rotation relative to said carriage; and said hammer co-operates with means for actuating radial reciprocating movements in translation by peening by making use of electromagnetic energy and reciprocating motion inside a solenoid coil, preferably also in co-operation with a spring.
    Type: Application
    Filed: July 10, 2008
    Publication date: May 12, 2011
    Applicant: Saipem S.A.
    Inventors: Eric Kerdiles, Jean-Yves Goalabre, Xavier Rocher
  • Patent number: 7934407
    Abstract: A process for producing a metallic component of a structural member or the like used in an aircraft or automobile or the like, the process including shot peening the surface of a metallic material, wherein the fatigue properties of the metallic material are improved with almost no variation in the surface roughness over the course of shot peening. Shot peening the metallic material surface uses a shot material having an average particle size of not more than 200 ?m, and the ratio of the surface roughness of the metallic material surface following the projection step relative to the surface roughness of the metallic material surface prior to the projection step is not less than 0.8 and not more than 1.5.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: May 3, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuyuki Oguri, Takahiro Sekigawa, Akiko Inoue
  • Publication number: 20110074079
    Abstract: A manufacturing method of a coil spring for an automobile suspension includes forming a material into a coil shape; performing a heat treatment step on the material; performing a warm shot peening step on the material, and performing a hot setting step on the material. By performing the warm shot peening step prior to the hot setting step, a stronger compressive residual stress is imparted in a direction along which a large tensile stress acts during actual use of the coil spring, thereby improving sag resistance and durability of the coil spring. A coil spring is also manufactured according to this method.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 31, 2011
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Takayuki Sakakibara, Takanori Kuno, Shingo Mimura, Masami Wakita
  • Patent number: 7832243
    Abstract: A shot-peening device(s) is installed on a side of a cabinet defining an ejection chamber in the cabinet. Shots ejected from the device to a workpiece fall and are conveyed in a horizontal direction by a horizontal screw conveyor positioned above a lower end of the cabinet and then conveyed upward by a vertical screw conveyor whose base end is above the lower end of the cabinet. The shots pass from an upper section of the vertical screw conveyor through a chute to reach an opening/closing gate. When the gate is opened and the shots are supplied to the device(s) for re-ejeciton, a portion of the shots is cause to overflow from the gate. The overflowed shots are caused to pass through a separator to remove impurities and then returned to the horizontal screw conveyor.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: November 16, 2010
    Assignee: Sintokogio, Ltd.
    Inventors: Koji Ushida, Mitsuo Ishikawa, Hiroaki Watanabe, Hideaki Kaga, Nobuyoshi Kawai, Akikazu Yokoi