By Heating Means Adapted To Be Inserted Into A Hollow Object Patents (Class 266/123)
  • Patent number: 9187796
    Abstract: An inner-diameter quenching device is provided with a workpiece holding assembly for holding a workpiece to be quenched, a spray cylinder, and a heating coil. The workpiece has a central axis. The spray cylinder is disposed at a first side of the workpiece holding assembly and driven by a lifting assembly to move along the central axis into an inner diameter of the workpiece. The heating coil is disposed at a second side of the workpiece holding assembly and located on and movable along the central axis. The heating coil and the spray cylinder are separated and movable in opposite directions along the same center axis, which can further reduce the size of the quenching device, making it suitable for quenching a small inner-diameter workpiece. Besides, the spray apertures are inclined, so that the cooling liquid can be sprayed out more easily to enhance the quenching effect.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: November 17, 2015
    Assignee: HIWIN TECHNOLOGIES CORP.
    Inventors: Shih-Tien Chang, Kun-Hung Chi
  • Patent number: 5134264
    Abstract: A device for induction heating of the inside of cylinder liners of reciprocating-piston engines to a transformation temperature, for the purpose of hardening. An inductor head is equipper with an aligning device designed as a spreadable cage which is equipped on the outside with clamping bars, clamping bosses a clamping shells which can be applied free from play and under the effect of force against the inner surface of the cylinder liner. The inductor loop is also displaced radially and brought into the working position by means of these clamping shells. Heating and hardening is carried out only with the inductor head in the clamped and exactly aligned state, whereas, after the clamping shells and the inductor loops have been released, a further indexed movement of the inductor head is possible. The work is carried out at relatively high alternating-current frequencies in the range between 400 and 500 kHz and at relatively high energy densities in the range above 5 kw/cm.sup.2 .
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: July 28, 1992
    Assignee: Mercedes-Benz AG
    Inventors: Dieter Burger, Walter Burbock, Peter Linden
  • Patent number: 4628167
    Abstract: An induction heating device is provided which can be easily and inexpensively modified to inductively heat and quench harden workpiece bores of various diameters. The device consists of a permanently mounted mandrel and easily interchangeable inductor coil and quench modules which can be easily and rigidly connected to the mandrel.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: December 9, 1986
    Assignee: Tocco, Inc.
    Inventor: William D. West
  • Patent number: 4592537
    Abstract: Thin walled broached parts are heat treated from manufactured dimensions to predetermined dimensions through control of heating, cooling and pressurization parameters during the heat treating cycle.
    Type: Grant
    Filed: January 7, 1985
    Date of Patent: June 3, 1986
    Assignee: Tocco, Inc.
    Inventors: George D. Pfaffmann, Paul L. Day
  • Patent number: 4468010
    Abstract: A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, which method and apparatus involves providing an inductor with an outer shape generally matching, but smaller than, the cross-sectional shape of the bore, supporting the workpiece with the axis entending vertically, energizing the inductor with a known frequency and at a selected power level, moving the energized inductor downwardly through the bore to inductively heat the inner surface progressively while applying no fluid quench to the inner surface, letting the workpiece cool and then moving the inductor upwardly through the bore to progressively heat the inner surface while progressively liquid quenching the inner surface immediately below and after the progressive heating operation.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: August 28, 1984
    Assignee: Park-Ohio Industries, Inc.
    Inventor: Donald E. Novorsky
  • Patent number: 4401485
    Abstract: A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, which method and apparatus involves providing an inductor with an outer shape generally matching, but smaller than, the cross-sectional shape of the bore, supporting the workpiece with the axis extending vertically, energizing the inductor with a known frequency and at a selected power level, moving the energized inductor downwardly through the bore to inductively heat the inner surface progressively while applying no fluid quench to the inner surface, letting the workpiece cool and then moving the inductor upwardly through the bore to progressively heat the inner surface while progressively liquid quenching the inner surface immediately below and after the progressive heating operation.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: August 30, 1983
    Assignee: Park-Ohio Industries, Inc.
    Inventor: Donald E. Novorsky
  • Patent number: 4298189
    Abstract: The invention relates to an apparatus for the continuous hardening of pump casings by means of flame hardening, with or without modifications to the core characteristics. As a result the life of the thus treated pump casing is considerably increased, even if it is exposed to a high degree of wear. This is achieved in that the horizontally positioned pump casing is moved past the flame hardening apparatus about a vertical axis and is simultaneously moved out of the horizontal position in such a way that the cooling water is removed over the already hardened inner wall surface.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: November 3, 1981
    Inventor: Vinzenz Siller
  • Patent number: 4030711
    Abstract: Method and apparatus for flame hardening the inner wall surface of tube bends of a circular configuration wherein either a flame hardening burner is passed longitudinally through the internal cavity of a tube bend which is mounted in a fixed position, or alternatively the tube bend is moved over a stationary flame hardening burner. This relative movement between tube bend and burner is effected along a circular path corresponding to the longitudinal center line of the tube bend. Subsequently to flame hardening the heated inner wall surface of the tube bend is quenched with cooling water discharged from water sprinklers disposed downstream of the flame hardening zone. During flame hardening and quenching the tube bend is continuously maintained in positions such that the quenching water may leave the tube bend by gravity.
    Type: Grant
    Filed: May 29, 1975
    Date of Patent: June 21, 1977
    Assignee: Esser-Werke GmbH vorm. Westmontan-Werke
    Inventor: Vinzenz Siller
  • Patent number: 4006337
    Abstract: An apparatus and method for heating the elongated, generally cylindrical surface of the internal elongated bore of a gun barrel preparatory to quench hardening of the cylindrical surface. There is provided a generally cylindrical inductor extending through the gun bore with electrical connector means between the gun bore and inductor at each end. One of the electrical connecting means includes an electrical circuit between the barrel and inductor wherein the electrical circuit includes means for creating a high frequency alternating current flow in the path including the inductor and gun barrel, in electrical series, whereby heating of the gun barrel is concentrated adjacent the cylindrical surface of the bore.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: February 1, 1977
    Assignee: Park-Ohio Industries, Inc.
    Inventor: John H. Maxim
  • Patent number: 3958796
    Abstract: Large diameter pipes are moved past a preheater, an induction heater, prequench nozzles, a sizing mill and post quench nozzles. An inside quenching head is mounted on a support tube, held against the inside wall of a pipe by rollers right at the sizing stand. The sizing rollers maintain or restore circularity of the pipe concurrently with quenching.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: May 25, 1976
    Assignee: Mannesmannrohren-Werke AG
    Inventors: Helmut Weidner, Helmut Landgraf