Methods Patents (Class 219/69.17)
  • Patent number: 8963040
    Abstract: A device and method for removal of fasteners by Electro-discharge Machining (EDM) such that portions of the fastener, such as a flange, may be separated from other portions of the fastener, such as a shank.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: February 24, 2015
    Assignee: Perfect Point EDM Corporation
    Inventors: James T. Legge, Mervyn Rudgley
  • Publication number: 20150034603
    Abstract: Components, such as turbine blades or vanes, are formed to a desired shape and dimensions by ablation machining a work piece surface. Recast layer material created on the work piece surface during the ablation machining is subsequently removed by fluoride ion cleaning (FIC). Exemplary ablation machining methods include laser machining and electric discharge machining (EDM). The work piece material may include superalloys commonly used for fabrication of turbine blades or vanes, which are susceptible to recast layer formation during EDM or laser machining. Post ablation FIC recast layer removal is easier than known methods, such as mechanical grinding, secondary EDM machining of the layer at lower speeds and/or current intensity, or chemical etching processes. Ablation machining processes can be optimized for speed and efficiency without regard for recast layer avoidance, with knowledge that the recast layer will be subsequently removed by the complimentary FIC process.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Inventor: Ivan F. Oliver Vargas
  • Publication number: 20150028548
    Abstract: A tool holder with a main part, a deformable receiving portion for clamping a tool, and at least one blocking element which is designed to engage into a corresponding counter element on the tool in order to prevent the tool from moving axially out of the tool holder. The at least one blocking element is integrally formed with the receiving portion. A clamping system having such a tool holder and a method for producing a receiving portion for such a tool holder are also described.
    Type: Application
    Filed: December 20, 2012
    Publication date: January 29, 2015
    Inventor: Franz Haimer
  • Publication number: 20150024229
    Abstract: A method of reinforcing a part formed from a sheet metal panel that has a predetermined area that requires reinforcement by forming a grid pattern of V-shaped channels in the predetermined area. The grid pattern may be formed by wire electrodes in an electro-hydraulic forming tool having a one-sided die. Alternatively, the grid pattern may be formed by a plurality of electrodes that are arranged in an array that is aligned in at least two directions on the opposite side of the part from the one-sided die.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventors: Sergey Fedorovich Golovashchenko, John Joseph Francis Bonnen
  • Publication number: 20150021299
    Abstract: Embodiments are directed to forming three-dimensional millimeter scale or micro-scale structures from single or multiple sheets or layers of material via electro discharge machining (EDM). In some embodiments, the electrodes are formed by single layer or multi-layer, single material or multi-material deposition processes. In some embodiments single electrodes form a plurality of parts or structures simultaneously. In some embodiments a sacrificial bridging material is used to hold parts together during and after EDM processing.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: Heath A. Jensen, Uri Frodis, Christopher G. Wiita, Michael S. Lockard
  • Publication number: 20150014902
    Abstract: A die for extrusion molding includes a first face, a second face, a raw material supply section, a molding section, and a structure. The molding section has a second through hole that extends from the second face toward the first face so as to communicate with a first through hole. The structure is such that a material for the die is machined to form the material into a predetermined shape and to provide a machining-affected layer on an inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, the oxidized layer is removed so that a treated surface is provided, and the treated surface is nitrided by ion implantation to provide a nitride layer.
    Type: Application
    Filed: September 29, 2014
    Publication date: January 15, 2015
    Applicant: IBIDEN CO., LTD.
    Inventors: Kiyotaka ANDO, Shuichi KAWANO, Makoto ASAI
  • Publication number: 20150014903
    Abstract: A die for extrusion molding includes a first face, a second face, a raw material supply section, a molding section, and a treated surface. The second face is provided opposite the first face. The molding section has a second through hole that extends from the second face toward the first face so as to communicate with a first through hole. The treated surface is provided on an inner wall surface of the second through hole to have a structure such that a material for the die is machined to form the material into a die shape and to provide a machining-affected layer on the inner wall surface of the second through hole in the molding section, an oxidized layer is provided by heating the machining-affected layer to oxidize the machining-affected layer so as to convert the machining-affected layer into the oxidized layer, and the oxidized layer is removed.
    Type: Application
    Filed: September 29, 2014
    Publication date: January 15, 2015
    Applicant: IBIDEN CO., LTD.
    Inventors: Makoto ASAI, Shuichi KAWANO
  • Patent number: 8927069
    Abstract: A method and apparatus for modifying low emissivity (low-E) coated glass, so that windows using the processed glass allow uninterrupted use of RF devices within commercial or residential buildings. Glass processed in the manner described herein will not significantly diminish the energy conserving properties of the low-E coated glass. This method and apparatus disrupts the conductivity of the coating in small regions. In an embodiment, the method and apparatus ablates the low-E coating along narrow contiguous paths, such that electrical conductivity can no longer occur across the paths. The paths may take the form of intersecting curves and/or lines, so that the remaining coating consists of electrically isolated areas. The method and apparatus are applicable both to treating glass panels at the factory as well as treating windows in-situ after installation.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: January 6, 2015
    Assignee: Eritek, Inc.
    Inventors: Eugenio Estinto, Robert Winsor
  • Publication number: 20150001182
    Abstract: A wire electrical discharge machining apparatus includes: multiple main rollers around which a wire winds in parallel; multiple workpiece feeding units for feeding the workpiece toward the wire; a machining power supply unit for supplying a machining voltage to the workpiece; and a power supply terminal for supplying the machining voltage to the wire. The multiple workpiece feeding units are respectively arranged at a first position for feeding the workpiece toward a wire portion having a wire plane of the wire and a second position for feeding another workpiece toward another wire portion having another wire plane of the wire. The power supply terminal is arranged at a third position between the first position and the second position. The machining voltage supplied from the single machining power supply unit is supplied to the workpieces to be electrically discharge machined by the multiple workpiece feeding units.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Inventor: Haruya Kurihara
  • Patent number: 8907244
    Abstract: The present invention includes steps of, determining a search starting position; setting a center position, and a first position and a second position with a distance provided therebetween; obtaining a measurement point group including measurement points of the center position, the first position, and the second position; and determining a measurement point closest to the tip portion in the measurement point group based on positions of the measurement points in a second direction and selecting a position of the measurement point in a first direction as a selected position. When the measurement point group is obtained initially after the determination of the search starting position, the search starting position is set as the center position; and when the measurement point group is obtained after the selection of the selected position, the selected position is set as the center position. The distance is narrowed for every selection of the selected position.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: December 9, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiaki Kurokawa, Hidetaka Katougi
  • Publication number: 20140320969
    Abstract: A method to prepare low reflective surface according to an example of the present invention comprises: the first step to prepare materials having pillar structure on the surface; the second step to prepare aluminum surface-materials by treating for the pillar structure to have aluminum surface; and the third step to prepare a low reflective surface with dual protuberance structure by forming nano-flake layer on the pillar surface of the material surface through oxidation of the surface aluminum of the aluminum surface-materials. The method to prepare low reflective surface can provide a low reflective surface structure that can be applied to photovoltaic device surface or various display surface as a surface able to reduce reflection significantly by absorbing wavelengths in the range of visible and infrared ray through internally total reflection with simple, low cost, and ecofriendly process.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 30, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Heon Ju LEE, Myoung Woon MOON, Kyu Hwan OH, Seong Jin KIM, Eu Sun YU, Tae Jun KO, Seung Chul KIM
  • Publication number: 20140291296
    Abstract: Methods, systems, and devices are disclosed for fabricating clean, oxidation-free nanoparticles of electrically conducting metals and alloys using spark erosion techniques. In one aspect, a method includes dispersing bulk pieces of an electrically conducting material in a dielectric fluid with mechanical vibrations within a container; generating an electric field using electrodes in the dielectric fluid using by an electric pulse, in which the electric field creates a plasma in a volume existing between the bulk pieces that locally heats the bulk pieces to form structures within the volume, the dielectric fluid quenching the structures to form nanoparticles, and filtering the nanoparticles through a screen including holes of a size allowing nanoparticles of the size or smaller to pass through the screen to a region in the container, in which the dielectric fluid inhibits oxidation of the surface of the nanoparticles.
    Type: Application
    Filed: October 12, 2012
    Publication date: October 2, 2014
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Sungho Jin, Ami Berkowitz
  • Patent number: 8835792
    Abstract: A device and method for the removal of a metal-sheath layer from a metal-sheathed structure using capacitive discharge in conjunction with step-up and step-down transformers to create a low voltage, high current pulse to remove a selected portion of the metal-sheath layer from the metal-sheathed structure.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: September 16, 2014
    Assignee: The Cleveland Electric Laboratories Company
    Inventors: Witold Pietrzak, Donald Robert Way
  • Patent number: 8822873
    Abstract: A method for manufacturing a honeycomb structure forming die including a liquid groove forming step for forming linear processing liquid grooves whose width is smaller than that of the slit, in positions for forming the slits that form the partition walls of the honeycomb structure by subjecting the kneaded clay to extrusion in one side end face as a kneaded clay forming face of a plate-shaped die substrate. An introduction hole forming step for forming introduction holes for introducing the kneaded clay is performed before or after the liquid groove forming step. Slits communicating with the introduction holes are formed by performing comb-like electro-discharge machining by a comb-like electrode where plate-shaped protrusion electrodes, each corresponding to the width of the slit, are disposed in positions including the processing liquid grooves.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: September 2, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Seiichiro Hayashi, Tomoki Nagae, Masanari Iwade, Hirofumi Hosokawa
  • Publication number: 20140203000
    Abstract: A process for identifying existence of a welded spot on a cut-out part and retention of the cut-out part on a workpiece in a wire electrode is disclosed which makes it possible to go ahead process steps while identifying automatically the retention of the cut-out part on a workpiece, ensuring unmanned work of the wire electrode discharge processor with saving the personnel and labor. The process comprises a rough cutting step to cut out the part from the workpiece, a welding step to partially weld the part with the workpiece, and an inspection step to detect whether the wire electrode comes into contact with a welded spot while moving the wire electrode along the cutting path of kerf in the workpiece. After the wire electrode has come into contact with the welded spot whereby the retention of the part on the workpiece has been identified, a step goes ahead to one of next procedures.
    Type: Application
    Filed: March 28, 2013
    Publication date: July 24, 2014
    Applicant: SEIBU ELECTRIC & MACHINERY CO., LTD.
    Inventors: Takashi Mitsuyasu, Masatoshi Kawano
  • Publication number: 20140202992
    Abstract: A worm wheel is provided in which a step is not formed near a tooth face meshing with a worm, and noise does not easily occur during power transmission. A worm wheel 1 includes a circular arc-shaped tooth section 5 that is a portion meshing with a worm 101 and configuring a circular tube worm gear, and a helical tooth section 4 that is connected to one end side of the circular arc-shaped tooth section 5. An angle of torsion at an arbitrary reference point 14 in a tooth depth direction of a tooth 3 on a boundary 7 between the circular arc-shaped tooth section 5 and the helical tooth section 4 is equal to an angle of torsion at a second reference point 15 corresponding to the first reference point 14 in the tooth depth direction of the tooth 3 in a diameter portion P0 of a throat of the circular arc-shaped section 5. As a result, a step is not formed on a tooth face on the boundary 7 between the circular arc-shaped tooth section 5 and the helical tooth section 4.
    Type: Application
    Filed: February 14, 2014
    Publication date: July 24, 2014
    Applicant: Enplas Corporation
    Inventor: Koji Akiyama
  • Publication number: 20140186164
    Abstract: A method of machining cooling holes in a component includes the steps of inserting an electro discharge machining guide that houses an electrode into an internal cavity of a component, and machining a cooling hole into a wall of the component with the electrode. A gas turbine engine component includes first and second spaced apart walls providing an internal cavity. The first wall has outer and inner surfaces. The inner surface faces the internal cavity. A cooling hole extends through the first wall from the inner surface to the outer surface. The cooling hole includes entry and exit openings respectively provided in the inner and outer surfaces. The exit opening includes a cross-sectional area that is smaller than a cross-sectional area of the entry opening.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: James M. Koonankeil, Edward F. Pietraszkiewicz, Karl A. Schachtner, Kevin J. Klinefelter, Markus W. Fritch, Jason Daley
  • Publication number: 20140183165
    Abstract: An erosion device and a corresponding method are disclosed for machining a hollow-cylindrical workpiece, wherein the device is elongated and/or formed in the manner of a tube or cylinder and is characterized in that at least two rotationally acting drives (A1, A2), each with a drive shaft (AW1, AW2), and also an erosion electrode (E), interacting with the drives (A1, A2) and formed in the manner of a ring or disc, are provided.
    Type: Application
    Filed: December 27, 2013
    Publication date: July 3, 2014
    Applicant: Westinghouse Electric Germany GmbH
    Inventor: Marco ECKERT
  • Publication number: 20140175064
    Abstract: Erosion electrodes and associated devices, systems, and methods for providing improved performance during a process driven by FEED and facilitated by fluid flushing of a worksite is disclosed. Use of erosion electrodes having varying cross-sectional geometries result in customizable channels, within which the FEED process may proceed, improving efficiency and efficacy of the process as the erosion electrode is advanced longitudinally into a work-piece.
    Type: Application
    Filed: January 12, 2012
    Publication date: June 26, 2014
    Inventors: Mervyn Rudgley, James T. Legge
  • Publication number: 20140144886
    Abstract: In an embodiment, a bearing assembly includes superhard bearing elements distributed circumferentially about an axis. At least one of the superhard bearing elements may include a first arcuate end portion, a second arcuate end portion, a first substantially planar face, a second substantially planar face, and a bearing surface. The first and second arcuate end portions may be generally opposite each other. The first substantially planar face may extend between the first and second arcuate end portions. The second substantially planar face may be generally opposite the first substantially planar face. The first substantially planar face may have a length greater than a length of the second substantially planar face. The bearing surface may extend between the first arcuate end portion, the second arcuate end portion, the first substantially planar face, and the second substantially planar face. The bearing assembly includes a support ring that carries the superhard bearing elements.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Applicant: US SYNTHETIC CORPORATION
    Inventors: Craig H. Cooley, Timothy N. Sexton
  • Patent number: 8710392
    Abstract: An apparatus and method for machining apertures into a conductive workpiece is disclosed. The apparatus has a tank capable of holding a dielectric fluid, and a fixture for holding the workpiece in the tank. An electric discharge machine with an electrode, a power supply connected to the electrode that produces machining pulses for electric discharge machining through the workpiece, and a controller for regulating the power supply and electrode position is also part of the apparatus. Finally, the apparatus has a pressure transducer connected to the fixture, and a process controller in communication with the electric discharge machine controller and pressure transducer.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: April 29, 2014
    Assignee: United Technologies Corporation
    Inventors: Sergey Mironets, James M. Koonankeil, Edward F. Pietraszkiewicz, Thomas R. Davis
  • Publication number: 20140103014
    Abstract: In carrying out electric discharge machining of a graphite or carbon-composite workpiece by a wire electric discharge machine, a voltage lower than that used in machining a metal workpiece by the wire electric discharge machine is supplied to a machining gap. Further, the peak value and the pulse width of a total discharge current flowing from a power supply device for electric discharge machining to a wire electrode are adjusted within ranges of 30 to 150 amperes and 0.3 to 6.4 microseconds, respectively.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 17, 2014
    Applicant: Fanuc Corporation
    Inventor: Yasuo ARAKAWA
  • Publication number: 20140097157
    Abstract: A method including mechanical removal and electrical discharge machining (EDM) working allowing symmetrical or asymmetrical holes to be produced with exact contours in a layer system including a metallic substrate and a non-metallic outermost layer is provided. In a first step, an outer region of the hole is worked by mechanical removal. In a final method step, when the underlying substrate or a metallic adhesion promoting layer has been reached an electrical discharge machining tool is used.
    Type: Application
    Filed: September 25, 2013
    Publication date: April 10, 2014
    Inventor: Hans-Thomas Bolms
  • Publication number: 20140094835
    Abstract: An infusion flow guidewire and a system including an infusion flow guidewire. The minimal cross section flexible infusion flow guidewire includes a nitinol hypotube, a flexible tip having a closed distal end, a coil, a core wire and at least one distally located rearwardly directed jet orifice for infusion of fibrinolytics and for introduction of high pressure fluids for maceration and rearwardly directed flow of thrombus debris located in tortuous small sized vessels. Apparatus, some of which is removably attachable, is provided in the system for grasping members of the invention for rotational torqueing and for longitudinal actuation along and within the vasculature.
    Type: Application
    Filed: December 9, 2013
    Publication date: April 3, 2014
    Applicant: MEDRAD, Inc.
    Inventors: John Riles, Douglas J. Ball, Michael J. Bonnette, Eric J. Thor, John L. Teschendorf, Hieu V. Le
  • Publication number: 20140042128
    Abstract: An electric discharge machining process, an article for electric discharge machining, and an electrically-conductive electric discharge machining coolant are disclosed. The electric discharge machining process includes electric discharge machining a target region of a component. The article includes a non-electrically-conductive layer, an electrically-conductive layer, and a target region on the non-electrically-conductive layer. The electrically-conductive electric discharge machining coolant includes a hydrocarbon liquid and carbon powder suspended within the hydrocarbon liquid.
    Type: Application
    Filed: August 8, 2012
    Publication date: February 13, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Ganjiang FENG, Jon Conrad SCHAEFFER, Michael Douglas ARNETT, Shan LIU
  • Patent number: 8648276
    Abstract: A method for fabricating a quadrupole mass filter (QMF) or quadrupole ion trap (QIT) capable of generating a hyperbolic electric field. The method comprises: (a) cutting four elongate erodible metal workpieces axially at opposing extremities; (b) parallel mounting the four elongate erodible metal workpieces axially in an elongate slot in an insulating housing in a mutually spaced apart disposition such that an axial bore is formed therebetween whereby a first part of each elongate erodible metal workpiece is freely inward facing and the cutting forms a recess remote from the axis of the insulating housing; (c) electrically connecting the erodible metal workpieces; and (d) generating electrical discharges between the erodible metal workpiece and a wire electrode as the wire electrode passes through the axial bore to erode the erodible metal of the first part of the erodible metal workpiece to a hyperbolic profile.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: February 11, 2014
    Assignee: Advanced Sensors Ltd.
    Inventors: Jason Duffin, Stephen Taylor
  • Publication number: 20140001159
    Abstract: The hand-held electro-discharge device to remove boluses of material from a workpiece is disclosed. In some implementations, a conductive electrode and its supporting ground pin are immersed in a dielectric fluid contained in a hood or cavity near or at the electrode's distal tip, and removably sealed to a conductive workpiece. A flushing inlet and outlet in fluid communication with said hood provide a flushing fluid, which may also be a dielectric fluid to remove FOD and to cool.
    Type: Application
    Filed: January 12, 2012
    Publication date: January 2, 2014
    Applicant: Perfect Point EDM Corporation
    Inventor: Mervyn Rudgley
  • Publication number: 20140001158
    Abstract: A system for repairing a component is provided. The system includes an electrochemical machining unit and a tool delivery apparatus. The electrochemical machining unit includes an electrode, a power supply configured to energize the electrode and the component, and a machining solution source configured to pass a machining solution between the component and the electrode. The tool delivery apparatus includes a number of linkage elements pivotally connected and configured to carry the electrode. The tool delivery apparatus further includes an actuation element configured to actuate the linkage elements to move the electrode. A tool delivery apparatus and a method for repairing a component disposed within a case are also presented.
    Type: Application
    Filed: June 27, 2012
    Publication date: January 2, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Zhipeng Zhang, Andrew Lee Trimmer, Mark James Cintula, Prabhjot Singh, Arvind Rangarajan
  • Publication number: 20130336800
    Abstract: Various embodiments of the disclosure include a component, methods of forming components, and methods of cooling components. In some embodiments, a component is disclosed including: a body; a microchannel extending through a portion of the body; a thermal barrier coating (TBC) covering a portion of the microchannel; and a marker member extending from the microchannel through the TBC or from an end of the microchannel, the marker member indicating a location of the microchannel in the body.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 19, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Benjamin Paul Lacy, Srikanth Chandrudu Kottilingam, David Edward Schick, Brian Lee Tollison
  • Publication number: 20130319974
    Abstract: A spark erosion tool (101, 102) is defined which comprises an electrode (301, 302) arranged on a tool longitudinal axis (2) and an electrode holder (401 . . . 417) aligned along the tool longitudinal axis (2) and arranged on the latter and connected to the electrode (301, 302). The electrode holder (401 . . . 417) comprises means for moving the electrode (301, 302) relative to the electrode holder (401 . . . 417) and means (6, 11, 12, 13, 15) for applying pressure acting transversely to the tool longitudinal axis (2) in the area of an imaginary hose (7) extending in the tool longitudinal axis (2), which has a cross section corresponding essentially to the electrode (301, 302). Furthermore, a method is defined of how the spark erosion tool (101, 102) can be used. In addition, an electrode (302) is defined for a spark erosion tool with a cylinder surface or a spherical surface, in which at least one groove (35) connected to a bore (36) is arranged.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 5, 2013
    Applicant: Schoeller-Bleckmann Oilfield Technology GmbH
    Inventor: Klaus METZNER
  • Publication number: 20130302633
    Abstract: A micro-scaled bi-material lattice structure includes a frame comprising a first material having a first coefficient of expansion and defining a plurality of unit cells. The bi-material lattice structure further includes a plurality of plates comprising a second material having a second coefficient of expansion different from the first coefficient of expansion. One of the plates is connected to each unit cell. The bi-material lattice structure has a third coefficient of expansion different from both the first coefficient of the expansion and the second coefficient of expansion, and the bi-material lattice structure has a thickness of about 100 nm to about 3000 microns.
    Type: Application
    Filed: April 17, 2013
    Publication date: November 14, 2013
    Inventors: Sergio Pellegrino, Keith D. Patterson, Chiara Daraio, Eleftherios Gdoutos, Namiko Yamamoto, Risaku Toda, Victor E. White, Harish Manohara, John B. Steeves
  • Patent number: 8581136
    Abstract: A method for manufacturing an impeller of a centrifugal rotating machine that is approximately disk-shaped and in which flow passages are formed between a plurality of blades and disposed in a radial manner from the inner circumferential side to the outer circumferential side, provided with a first flow passage formation step that forms a first region on the outer circumferential side within the flow passage by inserting an electrode of a shape fitting to the flow passage with the electric discharge machining method from the outer circumferential side of the disk-shaped body having an outer shape of an impeller, and a second flow passage formation step that forms a second region on the inner circumferential side within the flow passage from the inner circumferential side of the disk-shaped body.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: November 12, 2013
    Assignees: Mitsubishi Heavy Industries, Ltd., Hoden Seimitsu Kako Kenkyusho Co., Ltd.
    Inventors: Hisanori Kishimoto, Toyoaki Yasui, Akinori Tasaki, Eizaburo Tanaka, Takashi Maehara
  • Publication number: 20130292360
    Abstract: The present invention is equipped with a series circuit that includes a DC power supply, switching elements and a diode for supplying DC or AC current pulses to a machining gap between a machining electrode and a workpiece, diodes that regulate a direction of the current flow to one direction, and a control unit that controls the switching elements. When the control unit generates a current pulse having a triangular waveform by an inductance that is present in the series circuit, the control unit controls the switching elements in order that a current-pulse time ratio that is a ratio between the non-current time and the current continuation time in the current pulse is equal to or lower than ?.
    Type: Application
    Filed: April 12, 2011
    Publication date: November 7, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masahiro Okane, Satoshi Suzuki, Kiyohito Oda
  • Publication number: 20130277336
    Abstract: A device and method for removal of fasteners by force-less electrical erosion and disintegration (“FEED”) such that portions of the fastener, such as a flange, may be separated from other portions of the fastener, such as a shank and sleeve, further facilitate removal of the same. The device and method may be applied to fasteners having a rotationally loose fit within the sleeve.
    Type: Application
    Filed: November 3, 2010
    Publication date: October 24, 2013
    Applicant: Perfect Point EDM Corporation
    Inventor: Mervyn Rudgley
  • Patent number: 8556615
    Abstract: A die for forming a honeycomb structure, comprising a platy die base member having a clay supply face on back surface thereof and including a plurality of introduction holes for introducing a mixed raw material for forming; and a clay forming face on upper surface including a plurality of slits for extrusion of the material being connected to the introduction holes and formed lattice-like partition regions; at least a part of lattice-like partition regions being provided in such a position that the extended line of at least part of a plurality of lattice-like regions overlap with the slits at edges thereof as top view, slits including inner peripheral slits formed in the inner peripheral region, and outer peripheral slits formed in the outer peripheral region surrounding the inner peripheral region and having a width-enlarged portion having a width larger than that of the inner peripheral slit, and production method thereof.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: October 15, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Seiichiro Hayashi, Tomoki Nagae, Masanari Iwade
  • Publication number: 20130248495
    Abstract: A method for electrical discharge machining a workpiece includes the steps of: presenting an elongate electrode to the workpiece with a spark gap therebetween; flowing a dielectric fluid in the gap; eroding the workpiece by electrical discharge between the tip of the electrode and the workpiece; displacing the electrode in a direction aligned with the long axis of the electrode to maintain the gap as the electrode wears and the workpiece is eroded; and simultaneously with the displacement, producing vibratory movement of the electrode, the vibratory movement being aligned with the long axis of the electrode.
    Type: Application
    Filed: September 27, 2011
    Publication date: September 26, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventors: Fabio Nogueira Leao, Alexander Xidacis, Martyn Cuttell
  • Publication number: 20130243602
    Abstract: A method for machining a workpiece. An electrode is moved linearly in the direction of the workpiece to cause material to be removed from the workpiece, at least one end of a surface of the workpiece running obliquely to a guide edge of the electrode machining this surface. The electrode is moved at least partially with the electrode surface parallel to the surface, so that during the approach to the workpiece, areas of the workpiece having an irregular edge machined at a different intensity are formed, the difference in intensity of machining on the edge of the surface to be machined being compensated in that the surface to be machined is provided with a height profile adapted to the shape of the end of the surface to be machined. A blade ring segment and blade ring is also disclosed.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 19, 2013
    Applicant: MTU Aero Engines GmbH
    Inventors: Martin PERNLEITNER, Christian Bichlmaier, Carsten Zscherp
  • Publication number: 20130240487
    Abstract: In wire-cut electrical discharge machining apparatuses that simultaneously perform a plurality of cutting processes by engaging a wire between main guide rollers at a plurality of times, a wire-cut electrical discharge machining apparatus is provided that suppresses vibrations at cutting wire sections, to enable the cutting processes under steady-state accuracy. In addition to the main guide rollers, vibration-damping driven guide rollers or vibration-damping guides are included which form a plurality of cutting wire sections where the vibrations are suppressed by guiding the wire into place, and the positions of the cutting wire sections are thereby defined with respect to nozzles.
    Type: Application
    Filed: May 18, 2011
    Publication date: September 19, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hidetaka Miyake, Tatsushi Sato, Kazuhiko Fukushima
  • Patent number: 8525064
    Abstract: An electric discharge machine to process a work piece includes a plurality of electrodes, and a plurality of discharge power supply units. The plurality of electrodes generate a plurality of discharges with the work piece, respectively. The plurality of discharge power supply units apply voltages for the plurality of electrodes, respectively and independently.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: September 3, 2013
    Assignee: Denso Corporation
    Inventors: Akira Itoh, Yasuji Inobe, Hiroshi Adachi, Takeshi Oochi, Kazuhisa Ikuta, Michio Kameyama
  • Patent number: 8525065
    Abstract: An electric discharge apparatus includes electrode specification input means for inputting each electrode specification of a plurality of integral electrode where electrodes corresponding to a plurality of machining forms are arranged continuously on the same axis, machining detail input means for inputting data of a workpiece when electric discharge machining is performed using the integral electrode, and a machining program generation means for generating a machining program consisting of machining start position and a machining depth when electric discharge machining is performed using each electrodes based on the electrode specification and the thickness data of the workpiece thus input.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: September 3, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kohtaroh Watanabe, Rika Obata, Tatsuya Katou
  • Patent number: 8519296
    Abstract: A method and machine to allow for the spark-erosion machining of parts, in particular their finishing, using cylindrical or tubular tools by successive layers.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: August 27, 2013
    Assignees: AGIE Charmilles SA, Charmilles Technologies S.A.
    Inventors: Claudio Tricarico, Claude Rollet, Fabrice Jaques, Jean-Claude Diot
  • Publication number: 20130206733
    Abstract: A method for forming a cooling hole extending from an inlet on a first surface of a wall to an outlet on a second surface of the wall includes forming a diffusing section of the cooling hole, and a trailing edge on the outlet by electrical discharge machining, and forming longitudinal lobes in the diffusing section. The metering section extends from the inlet on a first surface of the wall towards the second surface of the wall. The diffusing section extends from the outlet to one end of a metering section located between the inlet and the outlet. The outlet is substantially linear or convex at the trailing edge and the lobes are separated by longitudinal ridges.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 15, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Glenn Levasseur, Edward F. Pietraszkiewicz, Mark F. Zelesky, Dominic J. Mongillo, JR., Kevin J. Klinefelter, Stephen D. Doll, Markus W. Fritch
  • Publication number: 20130168364
    Abstract: A go/no go ball feeler gauge includes a ball that is laser-welded to a rod. The rod is preferably cut utilizing an EDM process to provide a flat end to which the metal ball is laser-welded. Also, the metal ball is selected to have an initial size that is about 2 microns less than a final required size, and the laser welding process causes the ball to expand to the required diameter.
    Type: Application
    Filed: August 27, 2012
    Publication date: July 4, 2013
    Inventors: Daniel J. Ketelaar, David L. Schuiling, Thomas K. Nagle
  • Patent number: 8471167
    Abstract: A rough machining method for machining a channel in a workpiece includes the steps of: provide a power supply to energize one of a workpiece and an electrode as an anode and the other as a cathode; advance the electrode into the workpiece from a first start point to travel a first toolpath, so as to generate a first annular groove with a first core connecting with the workpiece; advance the electrode into the workpiece from a second start point to travel a second toolpath, so as to generate a second annular groove with a second core connecting with the workpiece, wherein the second annular groove intersects with the first annular groove and the first and the second cores are at least partially broken and disconnected with the workpiece upon intersecting of the first and the second annular grooves; and circulating a cutting fluid cross a working gap between a working face of the electrode and the workpiece.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: June 25, 2013
    Assignee: General Electric Company
    Inventors: Yuanfeng Luo, Garth Nelson, Ugo Cantelli, Renwei Yuan, Yimin Zhan
  • Publication number: 20130146227
    Abstract: Devices and methods for fusing materials using a heating element, where the overall mass to be sealed varies along the length of the seal. According to the invention, the heating element has a different profile in different areas. According to some aspects, the thickness and/or cross section of the heating element is different in different areas so that when a current is passed through the heating element, each area heats to a different degree. In some aspects, the heating element is shaped to conform to the shape of the parts to be fused together. The transition between areas of different thickness or cross-sectional area, or between areas of different shape may be sharply defined. This abrupt transition may be created by machining the heating element to a finished shape rather than bending flat stock to shape.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 13, 2013
    Inventor: Robert J. Mileti
  • Publication number: 20130139386
    Abstract: An abradable honeycomb is integrally formed in a turbine nozzle sealing flange for engagement with a bucket angel wing to reduce the leakage of air into the turbine's hot gas path. The honeycomb is integrally formed in a turbine nozzle sealing flange using a sinker EDM method to directly sink the honeycomb into the sealing flange itself, so that the honeycomb is an integral part of the flange. For repair, an entirely new honeycomb flange can be made and welded or brazed on to the turbine nozzle.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 6, 2013
    Applicant: General Electric Company
    Inventors: Benjamin Paul LACY, Raymond CHUPP, Nuo SHENG
  • Patent number: 8455783
    Abstract: A process for preparing the cutting edge of a cutting tool having a rake face and a clearance face. The process comprises the elimination of material from the cutting edge by providing a series of rapidly recurring electrical spark discharges in a gap located between the tool edge and a counterface. The spark discharges vaporize and melt the tool edge to form a desired radius.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: June 4, 2013
    Assignee: McMaster University
    Inventor: Philip Koshy
  • Publication number: 20130134860
    Abstract: The present invention relates to a conductive nanostructure, a method for molding the same, and a method for manufacturing a field emitter using the same. More particularly, the present invention relates to a field-emitting nanostructure comprising a conductive substrate, a conductive nanostructure arranged on the conductive substrate, and a conductive interfacial compound disposed in the interface between the conductive substrate and the conductive nanostructure, as well as to a method for molding the same, and a method for manufacturing a field emitter using the same.
    Type: Application
    Filed: February 23, 2011
    Publication date: May 30, 2013
    Applicant: SEOUL NATIONAL UNIVERSITY R &DB FOUNDATION
    Inventors: Yong Hyup Kim, Wal Jun Kim
  • Publication number: 20130131784
    Abstract: Implantable medical grafts fabricated of metallic or pseudometallic films of biocompatible materials having a plurality of microperforations passing through the film in a pattern that imparts fabric-like qualities to the graft or permits the geometric deformation of the graft. The implantable graft is preferably fabricated by vacuum deposition of metallic and/or pseudometallic materials into either single or multi-layered structures with the plurality of microperforations either being formed during deposition or after deposition by selective removal of sections of the deposited film. The implantable medical grafts are suitable for use as endoluminal or surgical grafts and may be used as vascular grafts, stent-grafts, skin grafts, shunts, bone grafts, surgical patches, non-vascular conduits, valvular leaflets, filters, occlusion membranes, artificial sphincters, tendons and ligaments.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 23, 2013
    Applicant: Advanced Bio Prosthetic Surface, Ltd., a wholly owned subsidiary of Palmaz Scientific, Inc.
    Inventor: Advanced Bio Prosthetic Surfaces, Ltd., a wholly owned subsidiary of Palmaz Scientific, Inc.
  • Publication number: 20130092323
    Abstract: A mandrel for processing a part comprises an outer sleeve and a generally flexible inner core. The outer sleeve includes at least one flexible portion along its length allowing the sleeve to flex to a desired contour.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 18, 2013
    Applicant: THE BOEING COMPANY
    Inventors: Doan Dinh Pham, Mark William Tollan