Park-ohio Industries

Tocco, Inc.

Paul L Day

George M Mucha

George D Pfaffmann

Norbert R Balzer

David R Soworowski

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.

Apparatus for heat treating and sizing thin walled articles

A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by engaging opposite axial ends of the elongated workpiece. Transverse deflection of the workpiece is prevented by paired restraints located adjacent the top and bottom of the workpiece near the opposite ends. As the quenching liquid is flooded into the quench tank from a storage tank, the heated elongated workpiece is rotated about its central axis at a fixed speed.

Method for quenching heated workpieces

Apparatus for quenching heated workpieces

A device for heating an elongated workpiece having a central axis which device comprises first and second axially spaced and axially aligned multiturn induction heating coils, each of which has a workpiece receiving passage extending therethrough. Means are provided for indexing a workpiece axially first into the passage of the first coil and then, after a time delay, axially into the passage of the second coil. There is also provided a quenching device used with the heating device for the previously heated workpieces which involves moving the workpiece to a first location above the liquid level of a quenching liquid in a tank with the axis of the workpiece extending in a given direction, shifting the heated workpiece transversely to a second position still above the liquid level, shifting the workpiece vertically downwardly into the quenching liquid of the tank at the second location, rotating the workpiece under the liquid level at a second location, shifting the workpiece transversely to a third location while still under the liquid level, lifting the workpiece vertically upwardly from the quenching liquid to a position above the liquid level, shifting the workpiece transversely to a fourth position still above the liquid level and then moving the workpiece from the tank.

Method and apparatus of inductively heating elongated workpieces

In a device for resistance heating of an elongated, generally cylindrical metal workpiece preparatory to quench hardening wherein the workpiece has a central, elongated axis and axially spaced first and second ends. The heating device includes first and second axially spaced electrode means for directing electrical current through the workpiece and between the spaced ends as the workpiece is supported in a selected, generally horizontal heating position. The improved feeding arrangement includes a transfer element with first and second separate nest means for supporting a workpiece with its axis generally parallel to the heating position. The second nest means is spaced horizontally from the loading position. This transfer element is reciprocally mounted for movement between a first location with a workpiece in the first nest means at the heating position and a second location with the first nest means being spaced from the heating position. Means are provided for shifting the workpiece from the loading position on the second nest means as the transfer element moves toward its first location and means for transferring a workpiece from the second nest means to the first nest means upon movement of the transfer element from the first location toward the second location to provide easy movement of the workpiece from the loading position, to the second nest means, to the first nest means and, then, to the resistance heating position.

Resistance heating device with improved workpiece feeding mechanism

Apparatus for quench hardening the surface of a previously inductively heated, elongated workpiece as it moves along a feed path, this apparatus comprises a quenching means surrounding the feed path, the quenching means includes an inwardly facing apertured wall facing the feed path, means for forcing a quenching liquid through the apertured wall toward the feed path for quenching the surface of the heated workpiece as it passes along the feed path and means for moving the apertured workpiece in a direction generally transverse to the feed path. In the preferred embodiment, the apertured wall is generally circular and is rotated around the workpiece.

Quench unit for inductively heated workpieces

A method and apparatus for inductively heating the axial, generally circular end of at least two elongated workpieces having central axes wherein the ends terminate in generally flat surfaces perpendicular to the axes. The method and apparatus includes locating the workpieces in side-by-side relationship with the axial ends facing a given direction and the respective axes being generally parallel, providing generally circular inductors matching each of the ends of the workpieces and normally spaced axially therefrom, moving the inductors axially of the workpieces until each of the inductors contacts the flat surface of one of the axial ends, locking the inductors with respect to each other, retracting the locked inductors axially away from the flat surfaces a selected air gap distance, rotating the workpiece about the axes and energizing the inductors to inductively heat the axial ends of the workpieces preparatory to hardening.

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Parma, OH, United States of America

Paul L Day