Width adjustable and temperature controllable transverse magnetic flux induction heating apparatus

Abstract

Present invention relates to a width adjustable and temperature controllable transverse direction magnetic flux induction heating apparatus. It contains belt material, fixed coil, mobile loop, yoke iron, guide way, travel mechanism, tank shape structure, fixed structure, and supporting rack, wherein fixed coil parallel to belt material surface, fixed coil long edge perpendicular to belt material direction of motion, removable loop parallel to belt material surface and located fixed coil outside it long edge parallel to belt material direction of motion mobile fixation to supporting rack, interior fixing several groove shape structure, yoke iron inserted in groove and fixed by fixing structure, each traveling loop can sliding in two ends guide way, supporting rack. Present invention is width and temperature controllable, can adapt belt material width variation in larger range and get more uniform temperature distribution, greatly raise production efficiency and save cost.

Description

technical field [0001] The invention relates to a width-adjustable and temperature-controllable transverse magnetic flux induction heating device. Background technique [0002] One of the important application fields of induction heating is the heating of metal sheets and strips (hereinafter referred to as strips). The heating methods can basically be divided into longitudinal magnetic flux induction heating and transverse magnetic flux induction heating. [0003] For longitudinal flux induction heating, the coil surrounds the workpiece such as Figure 1a shown. The alternating current generates alternating magnetic flux along the axial direction of the workpiece, and the eddy current generated by the alternating magnetic flux is parallel to the cross section of the strip. If a higher heating efficiency is to be obtained, the ratio of the strip thickness to the skin depth must be greater than 3, otherwise, the heating efficiency will be reduced due to the mutual cancellatio...

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Problems solved by technology

There are two disadvantages of this induction heating device: First, the air gap between the coil and the strip does not have a great influence on the temperature distribution, therefore, the adjustment of the air gap will not significantly improve the uniformity of the temperature distribution at the edge of the strip performance, in other words, this induction heater is able to adapt to the limited width of the strip

[0010] Since the temperature distribution generated by transverse magnetic flux induction heating is not only related to the position of the magnetic bar, but mainly depends on the shape and position of the coil, the effect of changing the temperature distribution simply by adjusting the position of the magnetic bar is not ideal. Induction heating device, since the width of the coil is much larger than the width of the strip, so that the edge of the strip will produce local overheating

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