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US 4,538,041 AGranted
Rotating induction heating apparatus
AssigneePark-Ohio Industries, Inc.
InventorRoger R. Budzinski
Life of this patent
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AssigneePark-Ohio Industries, Inc.
InventorRoger R. Budzinski
Estimating the term…
Apparatus for inductively heating a non-rotating workpiece includes a rotatable spindle of insulating material having a split-ring secondary mounted thereon for rotation therewith and which secondary has opposite ends electrically connected in series with the opposite ends of a multiple turn inductor coil. A primary winding in the form of a split-ring is supported in fixed coaxial relationship with respect to the spindle and the secondary ring thereon, and opposite ends of the primary ring are connected across a source of high frequency alternating current. The apparatus is mounted on a slide for displacement toward and away from a workpiece to selectively position the inductor in magnetically coupled relationship with the workpiece, whereby the workpiece is inductively heated in response to rotation of the spindle and energization of the primary ring. The ends of the secondary ring are electrically connected with the ends of the inductor through corresponding conductor bars, and the conductor bars and secondary ring are provided with fluid flow passageways for the continuous circulation of coolant therethrough and through the inductor between coolant supply and return lines of a fluid coupling assembly mounted on the end of the spindle opposite the inductor. The fluid coupling assembly also supplies cooling and quenching liquid through the spindle to the inductor.
Apparatus for inductively heating a non-rotating workpiece having an axis and a surface concentric therewith, comprising spindle means of insulating material having an axis and axially opposite ends, axially reciprocable slide means, means including said slide means supporting said spindle means for rotation about said axis, inductor means supported on one of said ends of said spindle means for rotation therewith, means providing a primary winding spaced radially outwardly of and extending about said spindle means and having ends connectable across a source of alternating current, means including said slide means supporting said primary winding in axially fixed and concentric relationship with said spindle means, plate means extending about said spindle means between said opposite ends thereof and providing a secondary winding concentric with said spindle axis and supported on said spindle means for rotation therewith, said plate means having circumferentially opposite ends, said inductor means having opposite ends each electrically connected to a different one of said opposite ends of said plate means, means for rotating said spindle means during energization of said primary winding, and means to reciprocate said slide means to selectively bring said inductor means and workpiece surface into magnetically coupled relationship, whereby said workpiece is inductively heated in response to rotation of said spindle means and energization of said primary winding.
Apparatus according to claim 25, wherein said spindle means includes passageway means therethrough between said opposite ends thereof and coaxial with said spindle axis, said inductor means including an inductor coil coaxial with said spindle axis and surrounding said spindle passageway means at said one end thereof, and said fluid coupling means including means connecting said spindle passageway means with a source of cooling liquid for flow through said one end of said spindle means, and said spindle means including a plurality of flow ports at said one end extending radially therethrough from said spindle passageway for directing coolant flow radially outwardly of said coil.
An apparatus for inductively heating a stationary workpiece having a cylindrical surface concentrically formed about an axis comprising:
Dependencies are inferred from the claim text.