METHOD F0R POSITIONING OF SLAB IN VERTICAL INDUCTION HEATING FURNACE

摘要

PURPOSE:To permit uniform heating in the breadthwise direction of a slab even if the breadthwise dimension of the slab is different by coinciding the central part of a slab to be heated with the central part of an induction heating coil. CONSTITUTION:The position of the height H from a working floor FL of the central part HC of an induction heating coil 2 is set, and it is inputted to an arithmetic and control unit 7 for the quantity of strokes every time the breadthwise dimension W of a slab 3 to be heated is charged thereto. In this way, the position P of the height at which the central part SC of the slab 3 should be coincided with the central part HC of the coil 2 can be operated by a prescribed formula. Then, by outputting a control signal corresponding to the above position P of the height to the unit 7, the quantity of a stroke S from a working floor FL is measured by a position detector 6 while an elevation device 5 is raised and is inputted to the unit 7, and the deviation S(P-S) is operated by comparison. At the point of time when this deviation S becomes zero, the elevation device 5 is stopped.