Gear Cutting Patents (Class 409/1)
  • Publication number: 20150043984
    Abstract: The present disclosure relates to an apparatus as well as to a method for the manufacture or processing of large tooth systems for internal or external teeth or large cogs in small production runs, wherein at least two machining methods are used with the aim of a complete machining of precision-relevant surfaces at these workpieces and while realizing production times which are as short as possible.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 12, 2015
    Inventor: Thomas Zeller
  • Patent number: 8777696
    Abstract: A relative movement trajectory of each convex tooth pin of a mating gear with respect to a concave-convex gear at the time when torque is transmitted between the mating gear and the concave-convex gear (nutation gear) may be expressed by a first linear axis, a second linear axis, a third linear axis, a fourth rotation axis, a fifth rotation axis and a sixth indexing axis. Then, a relative movement trajectory of each convex tooth pin of the mating gear, expressed by the first linear axis, the second linear axis, the third linear axis, the fifth rotation axis and the sixth indexing axis in the case where the fourth rotation axis is brought into coincidence with the sixth indexing axis, is calculated, and at least one of a disc-shaped workpiece and a working tool is moved on the basis of the calculated relative movement trajectory.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: July 15, 2014
    Assignee: JTEKT Corporation
    Inventors: Yoshiaki Ando, Masayuki Takeshima, Ikuko Hirota
  • Publication number: 20130025394
    Abstract: A method of determining an optimized face cone element for spiral bevel and hypoid gears. The form of the root fillet of one member of a gear pair is determined and that from is transferred to the tip of the other member of the gear pair. With the inventive method, tooth root-tip clearance is optimized and the contact ratio is maximized while avoiding root-tip interference between mating gear members.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 31, 2013
    Applicant: THE GLEASON WORKS
    Inventor: Qi Fan
  • Patent number: 8127425
    Abstract: A gear production plant has, along a gear production path, a station for preparing a number of blanks; a cutting station, where respective teeth are cut on the blanks to obtain a number of semifinished parts; a heat treating station, where the toothed semifinished parts are carburized or nitrided; and a finish station for finish machining the heat treated semifinished parts; the plant also having a check station located along the production path, downstream from the heat treating station or the finish station, and which houses an optical measuring unit for non-destructively determining the effective carburized or nitrided case depth on the teeth.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: March 6, 2012
    Assignee: AVIO S.p.A.
    Inventors: Salvatore Milletari, Giulio Barbato
  • Publication number: 20100290851
    Abstract: A method of determining axial and/or radial runout due to workholding equipment and compensating for such runout during machining of a gear wherein axial and/or radial runout compensations are executed during the machining of each individual tooth slot.
    Type: Application
    Filed: March 16, 2009
    Publication date: November 18, 2010
    Applicant: THE GLEASON WORKS
    Inventors: Hermann J. Stadtfeld, Joseph A. Courtney, Gary J. Kimmet
  • Publication number: 20100272534
    Abstract: A method of dressing a barrel worm-shaped tool to carry out the dressing of a barrel worm-shaped tool formed to grind tooth face of an internal gear with precision, dressing apparatus, and internal-gear grinding machine are provided. For this purpose, a disc-shaped disc dresser (13) is made to mesh with a barrel worm-shaped grinding wheel (12) having its diameter gradually increasing from the two end portions in the axial direction thereof towards the middle portion thereof and used to grind an internal gear (11). The barrel worm-shaped grinding wheel (12) is made to rotate around a tool-rotating shaft (B) disposed at a predetermined shaft angle (A1) with a vertical work-rotating shaft (C1) for the internal gear (11). The disc dresser (13) is made to rotate around a dresser-rotating shaft (D), the disc dresser (13) being disposed at an angle that is equal to a helix angle of the internal gear (11).
    Type: Application
    Filed: August 12, 2008
    Publication date: October 28, 2010
    Inventors: Yoshikoto Yanase, Masashi Ochi, Hiroshi Gunbara
  • Patent number: 7809463
    Abstract: A machining apparatus, in which a plurality of user set programs in relation to one axis is written and the amount of the infeed motion of the grinding wheel is increased to restrain the change of the load of the grinding wheel, improves a machining accuracy and achieve a longer life of the grinding wheel.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: October 5, 2010
    Assignee: JTEKT Corporation
    Inventors: Toshihiro Yonezu, Hiroaki Sugiura, Yoshitaro Osaki
  • Publication number: 20080286062
    Abstract: In the present invention, driving torque outputted from a motor portion is transmitted to a worm from a motor shaft, further to a helical gear from the worm, and is taken out to the outside from an output shaft which rotates together with the helical gear with a fixed shaft fixed to a gear box as a center. This fixed shaft is constructed in a hollow and cylindrical shape having an opening in which one end portion thereof has been opened, and a ceiling surface in which the other end portion thereof has been closed, and one end portion of this fixed shaft is subjected to dislocation preventive work, and is fixed to a gear box made of resin by pressing-in or insert molding. The other end portion of the fixed shaft is formed with the dislocation preventive structure of the output shaft and the helical gear installed to the fixed shaft.
    Type: Application
    Filed: July 24, 2008
    Publication date: November 20, 2008
    Inventors: Takeshi OKUMURA, Kazuyuki Yamamoto, Shinichi Taniguchi
  • Publication number: 20080014036
    Abstract: A sprocket is formed by fine-blanking a steel plate using a die having a cutting edge shaped to produce rounded edges on the back sides of the sprocket tooth heads, and protrusions on the front sides. Thereafter the edges of the front sides of the sprocket tooth heads are formed in a press so that the protrusions are removed, and the edges of the front sides of the sprocket tooth heads have a rounded cross-sectional shape substantially the same as that of the edges of the front sides.
    Type: Application
    Filed: January 16, 2007
    Publication date: January 17, 2008
    Applicants: Tsubakimoto Chain Co., Yamamoto Seisakusho Co., Ltd.
    Inventors: Takashi Ueki, Katsuhiro Yamamoto
  • Patent number: 6964210
    Abstract: A gear and method for producing the gear. The gear has a gear tooth profile conjugate to a gear basic-cutter tooth-profile having an addendum with a convex portion having an addendum point proximal to a pitch line and a dedendum with a concave portion having a dedendum point proximal to the pitch line. The convex portion is complementary with a corresponding portion of a mating-gear basic-cutter tooth-profile dedendum. The concave portion is complementary with a corresponding portion of the mating-gear basic-cutter tooth-profile addendum. A transition zone between the addendum point and the dedendum point has a predetermined width. The gear basic-cutter tooth-profile has a predetermined half pitch relief at the pitch line and continuity of profile and continuity of slope at the addendum point.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: November 15, 2005
    Assignee: Genesis Partners, L.P.
    Inventor: John R. Colbourne
  • Publication number: 20040040133
    Abstract: The invention concerns a machine for the chip-forming machining and the measurement of gears and screw-type workpieces. Arranged on a swivel head (6) swivellable about an axis (A) at right angles to the rotary axis of the workpiece (4) are functional units (8a, 8b, 8c, 8d) with machining and measuring tools (10, 12, 14, 15, 17) which are displaceable radially and parallel relative to the swivel axis (A), which said tools can be brought consecutively into engagement with the workpiece (4), thus making possible the application of different tools (10, 12, 14, 15, 17) and machining techniques in the same work set-up without colliding. The work spindle (1) is driven by electric motor either directly or via a gear unit.
    Type: Application
    Filed: July 16, 2003
    Publication date: March 4, 2004
    Applicant: Reishauer AG
    Inventor: Erich Ronneberger
  • Publication number: 20040018066
    Abstract: A materials processing machine, in particular, a mill, a sifter or a rotary-vane feeder, having at least one articulated connection for movably holding at least one movable machine part on a stationary machine part. In order to achieve a simplified operation, in particular, when the machine is arranged in an isolator, the articulated connection contains a first pivoting arm that is movably coupled to the stationary machine part and at least one additional pivoting arm that is coupled in a pivoting fashion to the first pivoting arm and serves for holding the movable machine part.
    Type: Application
    Filed: April 23, 2003
    Publication date: January 29, 2004
    Inventor: Ekkehart Illigner
  • Publication number: 20030198526
    Abstract: A gear and method for producing the gear. The gear has a gear tooth profile conjugate to a gear basic-cutter tooth-profile having an addendum with a convex portion having an addendum point proximal to a pitch line and a dedendum with a concave portion having a dedendum point proximal to the pitch line. The convex portion is complementary with a corresponding portion of a mating-gear basic-cutter tooth-profile dedendum. The concave portion is complementary with a corresponding portion of the mating-gear basic-cutter tooth-profile addendum. A transition zone between the addendum point and the dedendum point has a predetermined width. The gear basic-cutter tooth-profile has a predetermined half pitch relief at the pitch line and continuity of profile and continuity of slope at the addendum point.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 23, 2003
    Inventor: John R. Colbourne
  • Patent number: 6632052
    Abstract: Method for machining right toothed bevel gears, wherein: at least a part of the tooth flanks is milled with a disc milling cutter, the left tooth flanks are milled at a different time than the right tooth flanks, the machined bevel gear is rotated by an angle between the milling process of at least one left tooth flank and the milling process of at least one right tooth flank, the inclination of the axis of the disc milling cutter remains unchanged during the milling process of said gear, said angle being not a multiple of the base pitch &agr;.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: October 14, 2003
    Assignee: Lambert AG
    Inventors: Peter Moeri, Walter Simon
  • Patent number: 6568884
    Abstract: A device aids the setter of a cutter head for cutting, e.g., milling or hobbing, of spiral bevel gears to align all rod-shaped blades with their tip cutting edges to an axial height which is as uniform as possible and to move them with their profile cutting edges to a correct radial position in the cutter head so that uniform chip removal can take place. The device has a stable arm which can be moved numerically controlled axially and radially to the cutter head, with positions which are continuously measured and with which each individual blade can be automatically pushed into its chamber in the cutter head. A probe which is connected to the arm measures the axial height of the tip cutting edge of each blade before, during and shortly after each blade is pushed in.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: May 27, 2003
    Assignee: Klingelnberg Sohne GmbH
    Inventor: Georg Mies
  • Publication number: 20030002943
    Abstract: Method and device for determining contact between a tool and a workpiece clamped on a processing machine. A signal, such as a high-frequency electrical current signal or an acoustic signal, is supplied between a location at the tool and a location at the workpiece. For as long as the tool and the workpiece are not in contact with each other, the signal has a specific amplitude. As soon as the tool and the workpiece make contact with each other, the two locations are additionally connected through a resistor connected parallel to the resistance of the machine. Thereby the amplitude changes significantly. The process can be performed manually and automatically. It can also be employed at a quasi-standstill of tool and/or workpiece, but also when the elements are moving.
    Type: Application
    Filed: May 15, 2002
    Publication date: January 2, 2003
    Inventor: Dieter Ulbrich
  • Patent number: 6416262
    Abstract: A bevel gear is generated using an annular milling cutter having a blade material made of a high-speed tool steel mounted to a main body, the blade material being coated with at least one layer of a film of a composition substantially comprising (Ti(1−x)Alx)(NyC(1−y)) (where, 0.2≦x≦0.85, 0.2≦y≦1.0), and dry cutting is performed at a cutting speed in the range from 20 to 400m/min without using a cutting oil. With this method, teeth can be generated at a greatly improved cutting speed without using any expensive tool such as cemented carbide, thereby realizing efficient production of a bevel gear at a reduced cost.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: July 9, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Toshiaki Ishimaru, Youzou Nakamura, Akihide Kakutani, Tsuneo Egawa
  • Patent number: 6164880
    Abstract: A method for producing a fillet on a gear as a function of a plurality of design criteria points in disclosed. The present method includes the steps of fitting a polynomial curve to the design criteria points, and producing the fillet on the gear, the fillet having a curved shape corresponding to the fitted polynomial curve. As a further step for control of the fillet, the actual shape of the fillet produced can be inspected and compared to the fitted curve, using a coordinate measuring machine or other suitable device. According to a further aspect of the invention, the fillet is produced using a tool having a curved surface corresponding to the polynomial curve.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: December 26, 2000
    Assignee: Caterpillar Inc.
    Inventors: Franklin T. Pulley, Michael W. Kipling, Gregory A. Matson, Danny L. Thurman, Bennett W. Avery
  • Patent number: 5904457
    Abstract: A method of monitoring the condition of a tool in a machining operation for producing a plurality of toothed workpieces. The process comprises measuring the temperature of at least a portion of the plurality of workpieces each at essentially a same predetermined amount of time after machining. The temperature of each measured workpiece is compared to at least one workpiece reference temperature value indicative of a wear condition of the tool. If the measured temperature is less than or equal to the workpiece reference temperature value, machining of subsequent parts continues, or, if the measured temperature is greater than the workpiece reference temperature, the machining operation is stopped.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: May 18, 1999
    Assignee: The Gleason Works
    Inventors: Paul W. Suwijn, Hermann J. Stadtfeld
  • Patent number: 5662439
    Abstract: An apparatus (40) for applying marking compound to the tooth surfaces of a gear or pinion member (14). The apparatus comprises a brush (42) having a central shaft (82) and a plurality of bristles (44) emanating from the shaft (82) with the brush (42) being rotatable about an axis of rotation coincident with the shaft (82). The apparatus also includes a cover plate (49) and a marking compound manifold (48) adjacent to the brush (42) comprising an inlet (92) in a first side of the manifold (48), an inner distribution chamber (94) communicating with the inlet (92), and a plurality of outlets (96) in a second side of the manifold (48) communicating with the inner chamber (94), the outlets (96) facing the bristles (44) of the brush (42). The apparatus (40) further includes means (52, 54) to move the brush (42) and manifold (48) from a first position remote from the gear or pinion (14) to a second position wherein the bristles (44) engage the tooth surfaces of the gear or pinion (14).
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: September 2, 1997
    Assignee: The Gleason Works
    Inventors: John L. Reese, Kim R. Hancock
  • Patent number: 5500989
    Abstract: Applicants' invention is an enhanced chip guard assembly particularly adapted to be used in conjunction with a vehicular brake lathe having a tubular slide cross-feed with an integral dove tail mount for longitudinal feed. The enhanced chip guard assembly of the present invention includes a clip that fits within an opening in the cross feed assembly of the machine, a slide that fits over the clip, and a follower that fits about the neck of the drum feed guide arm and rides on the slide.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: March 26, 1996
    Assignee: Hennessy Industries, Inc.
    Inventors: James D. Ford, Larry C. Tuck
  • Patent number: 4385855
    Abstract: The hobbing machine is formed with a work table housing enclosing a work table rotatable about a workpiece axis, and indexing gear system for driving the work table; a stationary stand supports for movement parallel to the work axis a hob carriage, the latter supporting a swivel head and a hob slide movable transversely to the work axis and carrying a hob spindle; a hob driving gear system, a separate feed driving system, a differential and differential change gears are arranged in the hob carriage whereas indexing change gears are arranged in the work table housing and coupled to the differential in the hob carriage.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: May 31, 1983
    Assignee: Veb Werkzeugmaschinenkombinat"7.Oktober" Berlin
    Inventors: Heinz Papistok, Herbert Reuter
  • Patent number: 4284376
    Abstract: A hobbing machine for manufacturing spur and worm gears comprises a tool support provided with a support carriage movable in the direction of the axis of the blank to be machined and carrying a milling head provided with a separate feed drive which actuates via a branch gearing axial and tangential feed gear element and is connected via differential gears to a gear train for a hob. The branch gearing is arranged in the movable support carriage and includes a switch wheel which is engageable either with a drive wheel of the axial feed gear train or with the drive wheel of the tangential feed gear train and is controlled by a switching lever located on the support carriage.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: August 18, 1981
    Assignee: Veb Werkzeugmaschinenkombinat "7. Oktober" Berlin
    Inventors: Heinz Papistok, Herbert Reuter, Lothar Bachmann
  • Patent number: 4244668
    Abstract: An apparatus for forming internal gear teeth at large workpieces at a gear shaper or gear shaping machine comprising a machine bed at which there are arranged a workpiece table for chucking a workpiece and an upright or stand. The workpiece table and the stand are rotatable, relative to one another, about the workpiece axis and radially feedable relative thereto. The stand has guide means along which there can be moved to-and-fro a plunger by means of a plunger drive. An auxiliary stand is rotatably and radially displaceable about the workpiece axis upon a bearing rim which is coaxially attached at the workpiece. The auxiliary stand has a guide arrangement along which there can be moved to-and-fro, in the tooth lengthwise direction of the internal teeth, an auxiliary plunger driven by the plunger by means of a bridge arrangement.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: January 13, 1981
    Assignee: Maag Gear-Wheel & Machine Co., Ltd.
    Inventor: Walter Demuth