SYSTEM OF INDUCTION HEATING (VERSIONS) AND PROCEDURE FOR METAL SHEET INDUCTION HEATING Russian patent published in 2011 - IPC C21D1/10 C21D1/42 H05B6/44 

FIELD: metallurgy.

SUBSTANCE: system of metal sheet induction heating is equipped with induction coil. The induction coil is formed by connection of a conductor from the side of front surface of the sheet and a conductor from the side of back surface of the metal sheet. Thus, the metal sheet is surrounded along its width with a coil at some distance from surface of the sheet. Induction heat passes via internal part of the surrounding induction coil and heats the metal sheet. The induction coil consists of at least two sections in lengthwise direction bordering the said sheet. The conductors forming the induction coil are projected to the metal sheet vertically from the side of its front and back surfaces. The conductors from the front and back surfaces of the metal sheet are arranged at a distance to avoid overlapping in lengthwise direction of the metal sheet in its central part in each, at least two, sections of the induction coil. In the above described bordering the conductors of at least two sections of the induction coil from the side of front surface are in proximity to the metal sheet in lengthwise direction. The conductors from back surface in lengthwise direction of the metal sheet are positioned at a distance exceeding the distance of proximity of conductors to the metal sheet from front surface; or the conductors from the side of back surface are in the proximity to the metal sheet in lengthwise direction, while the conductors from the side of front surface in lengthwise direction of the metal sheet are located at a distance exceeding proximity of the conductors from the side of back surface of the metal sheet.

EFFECT: increased uniformity of metal sheet heating.

10 cl, 21 dwg