Electric heating – Metal heating – Of cylinders
Patent
1975-01-09
1976-07-20
Askin, Laramie E.
Electric heating
Metal heating
Of cylinders
219 1071, 219 1079, 266129, H05B 500, C21D 106, C21D 166
Patent
active
039708136
ABSTRACT:
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.
REFERENCES:
patent: 3337200 (1967-08-01), Balzer
patent: 3743809 (1973-07-01), Delpaggio
Askin Laramie E.
Park-Ohio Industries, Inc.
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