ELECTRIC INDUCTION HEAT TREATMENT

摘要

An induction coil with inner and outer coil segments joined together by a transition segment is arranged so that the outer coil segment generally inductively heat treats an annular outer region of a workpiece positioned under the coil, the inner coil segment generally inductively heat treats an annular inner region of the workpiece, and the transition segment traverses at least a portion of the width of the overall annular region of the workpiece to be heat treated. Relative arrangement of inner, outer and transition coil segments pro-vides for controlled induction heat treatment across the over-all annular region such as the gear teeth region of an intersect-ing axes or non intersecting and non parallel axes gear.