Process Patents (Class 409/66)
  • Patent number: 10859995
    Abstract: To provide a numerical controller for a machine tool capable of shredding chips efficiently along one path by making oscillating motion involving synchronization between multiple axes and intermittently making cutting-out motion and cutting-in motion.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: December 8, 2020
    Assignee: FANUC CORPORATION
    Inventors: Kenta Yamamoto, Naoto Sonoda
  • Patent number: 9962784
    Abstract: The invention relates to a thread forming tool having a thread part based on a helical effective surface (1), and an adjoining clamping shank (2), wherein the helical effective surface (1) is formed by pressing lobes (5) and the thread part extends from a chamfer or taper (6) in the direction of the clamping shank (2). Furthermore, at least one axially oriented, groove-like cooling channel (7) that runs between the pressing lobes (5) and extends from the chamfer or taper (6) to the clamping shank (2) is provided. According to the invention, the width of the at least one cooling channel (7) increases from the chamfer (6) in the direction of the clamping shank (2).
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: May 8, 2018
    Assignee: BASS GmbH & Co. KG Technick für Gewinde
    Inventor: Werner Böhm
  • Patent number: 9753452
    Abstract: A machine tool controller including a numerical control section, a spindle-axis control section and a feed-axis control section. The spindle-axis control section includes a section for making the spindle axis perform an accelerated rotation at maximum capacity from a process start position toward a target thread depth, with a maximum rotation speed set as a target value; a section for detecting a maximum acceleration during the accelerated rotation based on a rotational position; a section for detecting a residual rotation amount from a current position to the target thread depth, based on a total rotation amount and the rotational position; a section for detecting a current speed based on the rotational position; and a section for making the spindle axis perform a decelerated rotation at maximum capacity to reach the target thread depth after the accelerated rotation, based on the maximum acceleration, the residual rotation amount and the current speed.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: September 5, 2017
    Assignee: FANUC CORPORATION
    Inventors: Yuuki Morita, Tadashi Okita
  • Patent number: 9417619
    Abstract: A numerical controller controlling a machine tool calculates a number of incisions to a thread on the basis of an incision start position in a feed axis direction and an incision start position in a direction of an incision axis of a thread which are measured in a state in which a workpiece (a thread in the process of machining) is attached to a chuck of the machine tool, calculates an amount of phase deviation of a screw thread caused by reattachment of the workpiece on the basis of the calculated number of incisions, and re-machines the thread by positioning the workpiece and the tool while taking into consideration of the amount of phase deviation.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: August 16, 2016
    Assignee: FANUC Corporation
    Inventors: Kouhei Irie, Shuji Ogawa
  • Patent number: 9346108
    Abstract: A method for machining a helical bore of a stator comprises providing a stator body with a bore. In addition, the method comprises providing a first and a second machining device. The first machining device comprises a milling head coupled to the end of a shaft and a rotary cutter mounted to the milling head for rotation about an axis transverse to the longitudinal axis. The second machining device comprises a whirling head on the end of a shaft and a whirling cutter mounted to the whirling head for rotation about an axis parallel to the longitudinal axis but offset therefrom by a selectively variable degree. Further, the method comprises driving the first machining device through the bore multiple times with the rotary cutter following a helical path. Still further, the method comprises driving the second machining device through the bore with the whirling cutter following the same helical path.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: May 24, 2016
    Assignee: NATIONAL OILWELL VARCO, L.P.
    Inventor: Wessley Wilmot
  • Patent number: 9121458
    Abstract: A ring of a synchronizing device of a vehicle transmission includes a friction surface that interacts with a friction surface of another ring of the synchronizing device and at least one slide surface configured to slidably seat on an abutment surface of the synchronizing device. At least one curved groove is cut into the at least one slide surface by a whirling milling operation.
    Type: Grant
    Filed: March 6, 2010
    Date of Patent: September 1, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Alexander Dilje, Norbert Huhn, Ulrich Lang
  • Publication number: 20150078847
    Abstract: A method and apparatus for processing workpieces to form parts. Tools associated with a multi-spindle machine may be positioned with respect to a plurality of workpieces on a fixture comprising a plurality of platforms and an adjustment system. Each platform may be individually moveable with respect to others in the plurality of platforms about a number of axes. The plurality of platforms may be configured to hold the plurality of workpieces in which each platform may be configured to hold a workpiece in the plurality of workpieces during operations performed by the multi-spindle machine. The adjustment system may be configured to move each of the plurality of platforms about the number of axes independently from the others in the plurality of platforms. The operations may be performed on the plurality of workpieces using the multi-spindle machine and the fixture to form a plurality of parts.
    Type: Application
    Filed: July 29, 2014
    Publication date: March 19, 2015
    Inventors: Ryan L. Hanks, Kevin G. Waymack, David P. Heck
  • Publication number: 20140334888
    Abstract: A method for milling a threading of a screw or tapped hole. The threading has a cross section in the shape of a triangle with a truncated crest. The method includes milling a first flank (V1) of at least one spire of the thread by a first comb (A) of a milling tool (F). The teeth of the first comb (A) are spaced in relation to one another by a first pitch (P1). Then milling a second flank (V2) of at least one other spire of the thread by a second comb (B) of the milling tool (F), wherein the teeth of the second comb (B) are spaced in relation to one another by a second pitch (P2) equal to the first pitch (P1) and offset from the teeth of the first comb (A) by a phase displacement (DP). Then milling a truncated portion (V3) of the crest by a third comb (C) of the milling tool (F).
    Type: Application
    Filed: May 1, 2014
    Publication date: November 13, 2014
    Applicant: DC SWISS SA
    Inventor: Beat Kaufmann
  • Publication number: 20140294526
    Abstract: A method for producing a thread in a workpiece comprises the following process steps: a) producing a wall of the workpiece, wherein the wall has a number n of grooves greater than or equal to 1 encompassing a thread axis, b) introducing a corresponding thread-producing region of a thread-producing tool into each of the grooves, c) producing a thread in each subregion, adjoining the groove(s) of the wall of the workpiece by rotating the thread-producing tool about the thread axis, wherein, following rotation, each thread-producing region projects into the same groove again or into another groove in the wall, and d) moving each thread-producing region of the thread-producing tool out of the associated groove in the direction along the groove.
    Type: Application
    Filed: December 9, 2011
    Publication date: October 2, 2014
    Applicant: AUDI AG
    Inventor: Peter Kopton
  • Publication number: 20140112729
    Abstract: The invention relates to a method for producing and checking a thread arranged in a cylinder head to receive a spark plug. However, the invention also relates to a device for checking the thread introduced into the cylinder head. By defining a starting point of the internal thread to be produced specifically in terms of position thereof within the parent hole by using spark plug parameters, the spark plug will always be aligned with its spark gap oriented toward the injector. For the purpose of checking, use is made of a plug gage, the screw-in thread of which has the parameters of the spark plug thread and with which, by using a measuring face, the position of an extension on the threaded body can be established. The extension simulates the ground electrode of the spark plug.
    Type: Application
    Filed: October 23, 2013
    Publication date: April 24, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Peter Wilkins, Amando Jose Jose Sebastian, Timothy M. Hull, Juergen Bleyer, Reece Adams, Francis Maslar, Mike O. Thompson, Alexander M. Stoll
  • Publication number: 20140044598
    Abstract: Re-usable ceramic magic angle spinning (MAS) NMR rotors constructed of high-mechanic strength ceramics are detailed that include a sample compartment that maintains high pressures up to at least about 200 atmospheres (atm) and high temperatures up to about least about 300° C. during operation. The rotor designs minimize pressure losses stemming from penetration over an extended period of time. The present invention makes possible a variety of in-situ high pressure, high temperature MAS NMR experiments not previously achieved in the prior art.
    Type: Application
    Filed: August 7, 2013
    Publication date: February 13, 2014
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Jian Zhi Hu, Mary Y. Hu, Mark R. Townsend, Johannes A. Lercher, Charles H. F. Peden
  • Patent number: 8323073
    Abstract: A gear grinding tool can be trued and re-profiled. The geometry of the individual profiles in the direction of the tool axis is designed so that at least more than two, preferably all, flanks of the tool are used for rough machining of the work piece flanks, and that during finishing the re-profiled flanks provided only for roughing are set back far enough so that during finishing they do not come into contact with the work piece flanks.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: December 4, 2012
    Assignee: Gleason-Pfauter Maschinenfabrik GmbH
    Inventors: Dragan Vucetic, Björn Sander, Ingo Faulstich
  • Patent number: 8181843
    Abstract: In a friction stir welding method, a tool is moved being rotated along portions to be joined of a work piece, where the portions include a corner with a smaller curvature that connect two portions with larger curvatures. The method includes the steps of setting the work piece on a supporting member, rotating the tool around a center axis thereof, moving the tool toward the work piece to penetrate a portion of the tool into the work piece at the portions to be joined, and moving and turning the tool along the portions to be joined. A rotation speed of the tool around the center axis thereof is decreased to be smaller at the corner with the smaller curvature than the rotation speed of the tool around the center axis thereof at the portions with the larger curvatures.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: May 22, 2012
    Assignee: Calsonic Kansei Corporation
    Inventors: Masao Enzaka, Hiroyuki Hakaridani, Soichiro Yamamoto
  • Publication number: 20120100498
    Abstract: An orthodontic anchoring screw including a threaded shank, extending prevalently along a longitudinal axis, and a head provided with a seat extending substantially along a housing direction perpendicular to the axis and intended to house a metallic wire for imposing a correction action on a tooth. The head has engagement mechanism for holding the wire in the seat, which includes two shaped appendages, each with a shaped shank having a widened head fixed on top. The heads define between them a slit for inserting the wire, extending prevalently along a transversal direction, perpendicular to the longitudinal axis and inclined with respect to the housing direction of the seat. The shanks and the heads define together the seat, communicating with the slit to receive the wire.
    Type: Application
    Filed: July 5, 2011
    Publication date: April 26, 2012
    Inventor: Valter VIGOLO
  • Patent number: 8142119
    Abstract: A method of orbital milling is performed using an orbital end mill, which has a cutting bit designed for orbital end milling. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: March 27, 2012
    Assignee: Hanita Metal Works Ltd
    Inventor: Vladimir Volokh
  • Patent number: 8083444
    Abstract: A method and apparatus are provided to machine a curved surface such as an inner or outer peripheral surface of a pipe. The pipe is held stationary during machining and a rotatable spindle of a machine head moves along multiple orthogonal axes to align the rotational axis of the spindle with the longitudinal pipe axis. Preferably, the pipe axis is located by using a touch probe to engage the curved surface at multiple spots and the calculating the location of the pipe axis. The cutting tool, which is preferably a cutting tool insert, is rotated by the spindle to machine the curved surface.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: December 27, 2011
    Assignee: Mazak Corporation
    Inventor: Bernard Edward Schawe
  • Publication number: 20110211925
    Abstract: The invention relates to a method for generating a thread by a numerically-controlled tool machine (or: machine tool) using a thread generation tool, the thread generation tool being rotated by a tool spindle and simultaneously advanced according to the thread pitch in the axial direction, in order to generate a thread in a borehole of a workpiece. In order to increase the working velocity of the thread generation, the invention provides that the rotational velocity (?1) of the thread generation tool is geared up using a transmission gearing, which is situated so it is active between tool spindle and thread generation tool, in relation to the rotational velocity (?2) of the tool spindle. Furthermore, the invention relates to a numerically-controlled machine tool.
    Type: Application
    Filed: February 24, 2011
    Publication date: September 1, 2011
    Applicant: EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fur Prazisionswerkzeuge
    Inventor: Peter Liebald
  • Publication number: 20100166518
    Abstract: A method and apparatus are provided to machine a curved surface such as an inner or outer peripheral surface of a pipe. The pipe is held stationary during machining and a rotatable spindle of a machine head moves along multiple orthogonal axes to align the rotational axis of the spindle with the longitudinal pipe axis. Preferably, the pipe axis is located by using a touch probe to engage the curved surface at multiple spots and the calculating the location of the pipe axis. The cutting tool, which is preferably a cutting tool insert, is rotated by the spindle to machine the curved surface.
    Type: Application
    Filed: March 8, 2010
    Publication date: July 1, 2010
    Applicant: MAZAK CORPORATION
    Inventor: Bernard Edward Schawe
  • Patent number: 7674079
    Abstract: A method and apparatus are provided to machine a curved surface such as an inner or outer peripheral surface of a pipe. The pipe is held stationary during machining and a rotatable spindle of a machine head moves along multiple orthogonal axes to align the rotational axis of the spindle with the longitudinal pipe axis. Preferably, the pipe axis is located by using a touch probe to engage the curved surface at multiple spots and the calculating the location of the pipe axis. The cutting tool, which is preferably a cutting tool insert, is rotated by the spindle to machine the curved surface.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: March 9, 2010
    Assignee: Mazak Corporation
    Inventor: Bernard Edward Schawe
  • Patent number: 7455482
    Abstract: An indexable cutting insert has at least first and second cutting edges and first and second edge-location surfaces associated with the first and second cutting edges, respectively. The insert-manufacturing procedure includes forming the first edge-location surface with reference to the first cutting edge, and then forming the second edge-location surface with reference to the second cutting edge. There results an indexable cutting insert having at least two spaced-apart chip-removing cutting edges and a plurality of location surfaces adapted to engage a base body for determining the spatial positions of respective cutting edges, wherein each location surface determines the spatial position of no more than one of the cutting edges.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: November 25, 2008
    Assignee: Sandvik Intellectual Property AB
    Inventor: Göran Lundvall
  • Publication number: 20080273935
    Abstract: A method for cutting worm and worm wheel in a worm-gear reduction unit (1) with circulation of bearing balls, comprising the steps of: (a) obtaining races (30) for the bearing balls (4) onto the worm wheel (3); and (b) obtaining races (20) for the bearing balls (4) onto the worm (2), wherein step (b) provides the cutting of the races (20) according to a cutting profile substantially corresponding to the envelope of the subsequent positions assumed by the bearing balls within the worm wheel races being formed.
    Type: Application
    Filed: March 14, 2005
    Publication date: November 6, 2008
    Inventors: Pietro Salvini, Domenico Serpella, Francesco Vivio, Vincenzo Vullo
  • Publication number: 20080232916
    Abstract: The present invention proposes a process for producing threads, especially for boring rods or the like, wherein the workpiece and the lathe tool have a relative rotary motion at a high velocity about an axis of the workpiece and a relative longitudinal motion at a low velocity compared to the above velocity, and wherein an oscillating radial relative rotary motion is brought about, furthermore, between the lathe tool and the workpiece, wherein the radial oscillating motion is generated mechanically, the radial oscillating motion being synchronized, in particular, with the relative rotary motion. The present invention pertains, furthermore, to a device for producing threads by a means for generating the radial mechanical oscillating motion, where the radial oscillating motion is synchronized, in particular, with the relative rotary motion.
    Type: Application
    Filed: July 22, 2006
    Publication date: September 25, 2008
    Inventor: Harry Schiemann
  • Patent number: 7377732
    Abstract: A thread mill that is to be moved along a helical interpolation path while being rotated about an axis of the thread mill in a rotating direction, for forming a thread in a circumferential surface of a workpiece. The thread mill includes a cylindrical main body having (a) at least one spiral flute formed in an outer circumferential surface of the cylindrical main body, and (b) at least one cutting edge each provided by a rear-side one of widthwise opposite edges, as viewed in the rotating direction, of a corresponding one of the at least one spiral flute. Each of the at least one spiral flute extends in a direction opposite to the rotating direction as viewed in a direction away from a proximal end of the cylindrical main body toward a distal end of the cylindrical main body. Also disclosed is a method of forming the thread by using the thread mill.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: May 27, 2008
    Assignee: OSG Corporation
    Inventors: Haruyasu Andoh, Takayuki Nakajima
  • Patent number: 7347652
    Abstract: A numerical control unit issues a sequence of instructions for causing a spindle of a cutter disk in a tool machine to perform successive straight displacements approximating a spiral of Archimedes, with a predetermined angle step from one point to the next, and issues one or more ADIS instructions for merging each of the straight displacements with the next. The spiral path is such that the cutter disk will progressively shave a chip of a predetermined thickness over several revolutions, until its cutting edge is near the intended groove bottom. The tool is then caused to follow a merging path leading to a final point lying on the intended groove bottom, and finally is caused to follow a full circular path coaxial to the bore starting from the final point.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: March 25, 2008
    Assignee: Vigel S.p.A.
    Inventors: Gian Luca Giovanelli, Andrea Gay
  • Publication number: 20080008549
    Abstract: A method and apparatus are provided to machine a curved surface such as an inner or outer peripheral surface of a pipe. The pipe is held stationary during machining and a rotatable spindle of a machine head moves along multiple orthogonal axes to align the rotational axis of the spindle with the longitudinal pipe axis. Preferably, the pipe axis is located by using a touch probe to engage the curved surface at multiple spots and the calculating the location of the pipe axis. The cutting tool, which is preferably a cutting tool insert, is rotated by the spindle to machine the curved surface.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 10, 2008
    Applicant: MAZAK CORPORATION
    Inventor: Bernard Edward Schawe
  • Patent number: 7114891
    Abstract: A thread forming tool includes an elongated body defining a longitudinal center axis. The body including a thread forming portion formed by one or more annular ridges oriented perpendicular to the axis. The body has a non-circular shape in a cross sectional plane oriented perpendicular to the axis at an axial center of the ridge.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: October 3, 2006
    Assignee: Sandvik Intellectual Property AB
    Inventor: Björn Håkansson
  • Patent number: 7107664
    Abstract: A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project laterally for cutting engagement with a work-piece while the tool spins about its axis. The tool also orbits within or about a work piece, and in one orbit of the tool in a helical cutting path relative to the work piece a number of complete turns of the screw-thread are formed which is equal to the number of teeth of the insert in engagement with the work-piece. A secondary cutter carried on the thread cutting milling tool provides for formation of a pilot portion or counter bore on the work piece at an end of the screw thread. The pilot portion or counter bore provides for alignment of a threaded member which is to engage the screw thread.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: September 19, 2006
    Inventors: Gary K. Weise, Richard J. Kesl
  • Patent number: 7094010
    Abstract: The present invention relates to a thread milling cutter, which includes a cutting head, having a holder with a number of cutting insert pockets, a number of threading inserts, which are received in the cutting insert pockets and an attachment integrated with the cutting head, which attachment is intended to be received in a tool coupling. The invention also relates to the holder per se and to a method for milling an external thread on a spigot. The holder is provided with an internal cavity, which has an extension both radially and axially with regard to a rotational axis of the thread milling cutter, and the cutting insert pockets are provided in the internal cavity.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: August 22, 2006
    Assignee: Seco Tools AB
    Inventors: Christer Jonsson, Jorma Koskinen
  • Patent number: 6938670
    Abstract: A method for manufacturing a supercharger rotor by casting a profile portion of a supercharger rotor and a shaft penetrating the same, having the steps of: first cutting a left and right helical cross portion on a surface of the shaft connected to the profile portion, wherein the cross portion includes a right handed helical groove and a left handed helical groove, and these grooves cross each other; and casting the profile portion around the shaft in die-casting. In this way, a plurality of profile portion divided metal molds surround a profile portion and end metal molds surround both rotor ends. A helical core is attached to one end mold to pass through the profile portion. A rotor-shaped cavity forms inside the molds. Hot metal is pressurized, injected and solidified in the cavity, and the end mold having the helical core is pulled out by rotation along a helical line.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: September 6, 2005
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Mitsushi Maeyama, Yoshiyuki Miyagi, Shigeru Takabe, Masahiro Makita, Masayoshi Sasaki, Tatsuya Fujii
  • Patent number: 6890134
    Abstract: Methods for manufacturing endodontic instruments are provided. Methods relate to milling a blank with a cutting process to shape the instrument. Instruments so produced are also provided.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: May 10, 2005
    Assignee: 3M ESPE AG
    Inventors: Ingo Wagner, Michael Knee, Andreas Nitsch
  • Patent number: 6840722
    Abstract: A machining apparatus for machining a workpiece by rotating and revolving either the workpiece or a tool 1 to contact with each other. The machining apparatus comprises rotation/revolution ratio setting motors M1 and M3 for setting a ratio of a number of rotations to a number of revolutions of the workpiece or the tool 1, to a numerical value having a fraction below a decimal point, by changing the number of revolutions. The workpiece is machined by setting the number of revolutions and the number of rotations at the ratio.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: January 11, 2005
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroki Nonaka
  • Patent number: 6817870
    Abstract: A circuit device for interconnecting first and second multilayer circuit boards is described herein. The first multilayer circuit board may include a first plurality of electrically conductive vias of varying depths and the second multilayer circuit board may include a second plurality of electrically conductive vias. The circuit device comprises a first plurality of pins located on a first side of the circuit device corresponding to the first plurality of electrically conductive vias of the first multilayer circuit board, each pin having a length compatible with a depth of a respective one of the first plurality of electrically conductive vias of the first multilayer circuit board. The circuit device further comprises a second plurality of pins located on a second side of the circuit device corresponding to the second plurality of electrically conductive vias of the second multilayer circuit board.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: November 16, 2004
    Assignee: Nortel Networks Limited
    Inventors: Herman Kwong, Aneta Wyrzykowska, Luigi Difilippo
  • Publication number: 20040179914
    Abstract: A thread forming tool comprises an elongated body (4), having at a first end (6) a connector portion (8) and at a second end (10) a thread forming portion (12), said thread forming portion (12) comprising at least one annular ridge (14) about the circumference of said body. According to the invention, the cross-section of said body at the centre of said ridge has a non-circular shape.
    Type: Application
    Filed: May 12, 2004
    Publication date: September 16, 2004
    Inventor: Bjorn Hakansson
  • Patent number: 6761621
    Abstract: To provide a gear having high strength and high dimension precision. A cut material is heated in an anti-oxidation atmosphere. Then, a form including gear teeth and having a nearly completed shape is formed from the upset material at one time by hot forging. The form undergoes gear grinding, whereby a finished product is obtained. The form has a curved surface previously formed at a corner along a tooth trace of a tooth flank.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: July 13, 2004
    Assignee: O-Oka Corporation
    Inventor: Mitsuhiko Shimomura
  • Publication number: 20040128018
    Abstract: It is strongly demanded that a stable thread machining process be attained by carrying out a thread machining operation while varying the rotational frequency of a spindle, and thereby restraining the occurrence of cutting chatter. According to the present invention, in which a thread machining process is carried out on the basis of a rotation of the spindle and a movement of a feed axis, the above-mentioned demand is met by executing the steps of determining a relative phase error of the spindle positions and feed axis during a thread machining operation, and determining a movement quantity of the feed axis on the basis of a pseudo spindle position set by error-compensating the quantity of the relative phase error with respect to the spindle position.
    Type: Application
    Filed: December 9, 2003
    Publication date: July 1, 2004
    Applicant: OKUMA Corporation
    Inventor: Masayuki Sugie
  • Patent number: 6694847
    Abstract: A cutting tip having a three-layer laminated structure is provided. The tip is made from a disc-shaped three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer consisting of a tool material such as cemented carbide. Prismatic blanks of rectangular cross-section are cut out by cutting the three-layer laminate in strips. Semi-completed tips of a desired shape are obtained by cutting up the prismatic blanks. Desired cutting edges are formed on the semi-completed tips to produce completed tips. Because prismatic blanks are obtained from a three-layer laminate and semi-completed tips are cut out from the prismatic blanks like this, the semi-completed tips can be obtained in large numbers, yield is high, and the manufacturing cost of the tip can be reduced.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: February 24, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Minoru Hiroyasu, Satomi Isibasi, Masatomi Ito, Hiroyuki Nomura, Shigemitsu Nomura, Hiroyuki Fukushima
  • Patent number: 6687566
    Abstract: The present invention provides a method of machining a female screw groove in a workpiece whereby the spindle of an internal grinding wheel for machining the workpiece into a female screw is tilted relative to the screw's axis at an angle (&xgr;) smaller than the lead angle (&agr;) of the female screw. First, specifications of the female screw, data on the configuration of the thread groove, and the tilt angle are supplied to a program for calculating data on dressing of the grinding wheel wherein the locus of the groove on cross-sections normal to the axis of the grinding wheel and wheel dressing data are calculated. Second, the grinding wheel on the aforementioned spindle is shaped or dressed by simultaneous triaxial control of the rotation of the single point dresser about a b-axis, and the feed of the grinding wheel table along a z-axis and a cross slide along an x-axis based on the foregoing data. Thereupon, the female screw is machined with the dressed grinding wheel.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: February 3, 2004
    Assignee: Okuma Corporation
    Inventors: Takashi Nishimoto, Fumitoshi Terasaki
  • Patent number: 6565297
    Abstract: A method of milling a large thread length with a thread milling cutter having a shank and a milling section having a plurality of rows of teeth arranged in each row one after another with at least two adjacent teeth in each row being separated, in an axial direction by a missing tooth space, with the method including positioning the cutter in a bore of a workpiece, with the cutter being adjusted in an axial direction and fed outwardly, forming a portion of the thread by imparting to the cutter rotational, axial feeding, and circular movements, and forming a further portion of the thread by imparting to the cutter a further circular movement corresponding to the tooth missing space, while continuing to impart to the cutter rotational and axial feeding movement.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: May 20, 2003
    Inventor: M. Norbert Schmitt
  • Publication number: 20030086769
    Abstract: Methods and apparatus are provided for producing a curved tooth. Apparatus are adapted to perform a method that includes the steps of providing a workpiece, providing a tool, and providing relative movement between the tool and the workpiece such that the tool moves along a first curved path relative to the workpiece to define a first curved surface of a tooth in the workpiece. The relative movement can be accomplished by substantially simultaneous translation of at least one of the tool and the workpiece along a first linear axis and a second linear axis that is perpendicular to the first linear axis. Methods are also disclosed for compensating for deviations in a tool path.
    Type: Application
    Filed: September 17, 2002
    Publication date: May 8, 2003
    Inventor: Gregory A. Hyatt
  • Patent number: 6557226
    Abstract: Apparatus for manufacturing a bone dowel includes a machine base with tracks on a surface thereof. Modules configured to slide in the tracks may include a module for a high speed rotary tool, a collet module, a vise module and a threading module. A vise module may include a base configured to slide in the tracks of the machine base, a frame configured to slide on the vise module base, two opposing vise jaws held within the frame, a spring device between the vise jaws, and a press that sits on top of the vise jaws within the frame. A bone dowel manufactured using the apparatus may include smoothed ends, a slot on one end, a canal running through the dowel perpendicular to the long axis, a hole running through the dowel along the long axis, and threads on the outer surface.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: May 6, 2003
    Inventors: Michael E. Landry, Erik J. Wagner
  • Patent number: 6460435
    Abstract: A method of rotational milling of a thread on a workpiece and including providing a device having a rotatable workpiece spindle for supporting the workpiece and a rotatable milling cutter spindle for supporting a thread milling cutter, and displacing axially the workpiece spindle and the milling cutter relative to each other by a distance shorter than a length of the thread, while rotating the workpiece spindle and the milling cutter spindle with respective rotational speeds a ratio of which is not equal to 1; and displacing radially the workpiece spindle and the milling cutter spindle relative to each other.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: October 8, 2002
    Assignee: EMUGE-Werk Richard Glimpel Fabrik für Präzisionswerkzeuge vormals Moschkau & Glimpel
    Inventors: Ernst Meyer, Helmut Glimpel
  • Patent number: 6442826
    Abstract: A method for manufacturing pipe joints for connecting two pipe sections in a well bore allows the pipe joint to have increased resistance to compressive and torsional forces. Each pipe joint has a box member for matingly engaging a pin member, the pin member being threadingly connected to the box member to create the pipe joint. Threads are created for the pin member on a tapered exterior surface of a pipe, the threads being axially disposed between a pin end terminal surface and an external shoulder. A tapered surface having a recess is created for the box member on an interior of a pipe, the tapered surface being axially located between a box end terminal surface of the pipe and an internal shoulder, the recess being axially located just behind the box end terminal surface of the pipe. Threads are cut into the tapered surface of the box member, the threads beginning behind the recess and traveling axially away from the box end terminal surface.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: September 3, 2002
    Assignee: Hunting Oilfield Services, Inc.
    Inventors: John J. Staudt, Doyle E. Reeves
  • Patent number: 6343902
    Abstract: A reamer T including three-stage chip groups 6, each group having five chips 6 disposed circumferentially on a circle of a diameter smaller than an inside diameter of a hole H in a work W, axially at a given pitch P. When the axis Lt of the rotated reamer T is moved circumferentially on a circle about the axis Lw of the hole H after the reamer T is inserted into the hole H in the work W, the three-stage chip groups 6 simultaneously cut an inner peripheral surface of the hole H. When the reamer T is moved in the direction of pulling from the hole H by one pitch P in this state, the three-stage chip groups 6 simultaneously cut the inner peripheral surface of the hole H in the work W respectively by one pitch. Therefore, a boring work for providing the hole H having a depth D=3P in the work W can be completed in a short time.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: February 5, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Tsuneo Nishikawa
  • Patent number: 6293740
    Abstract: The invention involves a threading tool (20) for defining an internal thread within walls (62) of a cavity (64) within a workpiece having a floor (66) around an axially disposed protuberance (68) with a top (70) extending from the floor (66). The threading tool (20) includes a first end portion (22) for gripping and a second end portion (24) for threading. Threads (30) are formed on the second end portion (24). An opening (40) is axially disposed at the second end portion (24) and extends inward to form a recess (42) and recess bottom (44) over which the threads (30) extend a distance (A), allowing internal threads to be formed along the walls (62) past the top (70) of the protuberance (68).
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: September 25, 2001
    Assignee: Northern Tool Sales and Service Company
    Inventor: Paul M. Schulte
  • Patent number: 6257810
    Abstract: A milling tool for thread-milling and boring has a milling region with thread-milling cutters disposed on thread-milling teeth, and bore-milling cutters disposed on an end face. The tool regions where the milling cutters are disposed are made of hard materials. The thread-milling cutters have a rake angle. The tool is successfully used to mill high-strength materials. The rake angle of the thread-milling cutters is zero or negative, and a coating of hard material is present in the region of the milling cutters. The combination of features including the use of hard material in the cutting region of the tool, the provision of a coating of hard material in the cutting region, and a zero or negative rake angle, enables use of the milling tool for thread-milling and boring with high-strength workpieces without problems and without experiencing high wear.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: July 10, 2001
    Inventor: M. Norbert Schmitt
  • Patent number: 6183175
    Abstract: A tool holder for a tool drive with an outer and an inner concentric drive shaft. A first adapter is detachably held by a conventional clamping system in a receptacle of the outside drive shaft. A second adapter is concentrically mounted in the first tool receptacle of the first adapter so as to rotate with respect to the first adapter. The second adapter has a tool receptacle which can be inclined by a pivoting element. Thus, a tool can be eccentrically inserted and concentrically driven. This makes possible certain machining modes, for example the machining of a hollow shaft, since inner threads can now be turned rather than cut.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: February 6, 2001
    Inventor: Rudolf Gafner
  • Patent number: 6155148
    Abstract: A basic spiral operation of a tool is controlled by storing, in a controller, an automatic operation program of a threading cycle which regulates the basic spiral operation of the tool corresponding to a thread shape by specifying a spindle revolving speed RC, a thread lead ZR and a thread cutting finish point Z2 or the like. A depth of cut by the tool is determined by an operator who operates a handle of a manual pulse generator to cut the work and confirms the cutting conditions.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: December 5, 2000
    Assignee: Fanuc Ltd.
    Inventors: Satoru Shinozaki, Susumu Nagayama
  • Patent number: 6155756
    Abstract: A machine for forming threads in a cylindrical bone dowel made of bone material, comprising a planar surfaced base provided with a threaded guide member having an externally threaded portion. A holding and rotating assembly is mounted on the base to rotatably hold the bone dowel so that the central axis of the bone dowel extends in the axial direction of the threaded guide member, An essentially planar support member is mounted on the guide member for movement with respect to base and an angle adjustment assembly is mounted to the support member. A cutting assembly having a cutting member in the form of a burr is also mounted on the support member so that when the threaded guide member is rotated the cutting assembly and associated cutting member is carried by support member to engage the bone dowel.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: December 5, 2000
    Assignee: Musculoskeletal Transplant Foundation
    Inventors: Robert W. Mericle, Arthur A. Gertzman
  • Patent number: 6012882
    Abstract: Solid tungsten carbide is the popular material for these combinations tools. High resultant side forces on the tool during the thread milling phase are caused by relatively high circumferential engagement of the tool and a very low feed per tooth (chip thickness). A combined hole making, threading and chamfering tool with staggered thread cutting teeth doubles chip thickness and reduces side forces (resulting in less engagement), consequently allowing the feed rate to be increased while reducing thread milling time. In addition, this arrangement also reduces tool chatter, thus providing a smoother surface finish in the thread. In one form, the cutting teeth are formed on one or more removable inserts, facilitating replacement or substitution thereof.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: January 11, 2000
    Inventor: Manuel C. Turchan
  • Patent number: 5944462
    Abstract: A hole cutting tool for holemaking, chamfering, grooving, threading and/or O-ring grooving. The tool is a rotary tool for holemaking in a workpiece which includes one or more holemaking inserts about the outermost end of the tool, at least a pair of axially spaced apart chamfering inserts radially sunken into the intermediate portion of the tool, and one or more grooving inserts also radially sunken into the intermediate portion of the tool between the chamfering inserts, all of which provides for holemaking with chamfered entrance and exit edges and/or a slot, groove, or threads within the hole. An additional O-ring grooving insert may be provided to cut an annular groove around the hole on an end face of the workpiece.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: August 31, 1999
    Assignee: Kennametal Inc.
    Inventor: Bruce C. Woodward