Inductor for axially and circumferentially heating a rotating wo

Details Inductor for axially and circumferentially heating a rotating wo Inductor for axially and circumferentially heating a rotating wo

1979-08-09

1981-02-17

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1057, H05B 636

Patent

active

042517079

ABSTRACT:
An inductor coil is provided for inductively heating a hollow automotive front wheel spindle which has axially extending outer surface areas of different radial thickness. The coil has a single loop between the terminal ends thereof defined by circumferentially extending arcuate inductor portions which are axially spaced apart and connected with one another by means of axially extending inductor portions. The arcuate inductor portions are circumferentially progressive with respect to one another in the direction from one of the terminal ends of the inductor toward the other, and each arcuate portion is associated with a different one of the axially extending surface portions of the workpiece. Each arcuate portion has a circumferential extent different from the other two. Upon energization of the inductor and rotation of the workpiece relative thereto, the axial sections of the workpiece having different radial thicknesses and diameters are inductively heated to provide a uniform depth of the heating pattern axially of the workpiece.

REFERENCES:
patent: 2781438 (1957-02-01), Griffith, Jr.
patent: 2797288 (1957-06-01), Kiemele et al.
patent: 3827275 (1974-08-01), Suttan et al.
patent: 3846609 (1974-11-01), Enk
patent: 3848107 (1974-11-01), Lewis
patent: 4100387 (1978-07-01), Reinke et al.

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