Device for on-line roller heating and temperature controlling for warm-rolling mill

Abstract

A device for on-line roller heating and temperature controlling for a warm-rolling mill comprises four telescopic electromagnetic induction heating arcs respectively driven by oil cylinders, an infrared thermometer arranged on each heating arc, and temperature control modules controlling starting and stopping of the heating arcs. Absolute value displacement sensors are arranged inside the oil cylinders and can accurately control the distance between the heating arcs and the surfaces of rollers, and the temperature control modules can carry out comparative analysis on the surface temperature, fed back by the infrared thermometers, of the rollers and the temperature set initially and then control starting and stopping of the electromagnetic induction heating arcs. According to the device, the on-line roller heating requirement can be met fast, the process production requirement of fast replacement of the rollers and roller abrasion can be met, and various shortcomings in the prior heating technology of the rollers of the warm-rolling mill are eliminated. The device has the advantages of being compact in structure, high in heating speed, accurate in temperature control and safe in heating.

Description

technical field [0001] The invention belongs to the technical field of plate and strip rolling, and in particular relates to an online hot roll of a warm rolling mill and a temperature control device. Background technique [0002] In the field of metal sheet and strip rolling, for low-plastic and difficult-to-deform metals such as magnesium and magnesium alloys, cold rolling at room temperature is very difficult, and intermediate fractures and edge cracks are prone to occur. Affect product quality and production efficiency. For this kind of low plasticity metal, it is often rolled by a warm rolling process that is lower than the metal recrystallization temperature and higher than the normal temperature of the cold state. One method of the traditional warm rolling process is to only heat the rolled piece without hot rolling. In this method, due to the temperature difference between the roll and the workpiece, the temperature of the rolled piece is not uniform, and the rolled ...

AI Technical Summary

Problems solved by technology

However, the current methods for heating the rolls of low-plasticity metal warm rolling mills cannot meet the technological requirements of high-efficiency and stable batch production of rolling mills.

One method is to heat the surface of the roll by burning a heat source, and remove the heating device after heating to a certain temperature. The disadvantage of this method is that it cannot be heated online during the rolling process of the rolling mill, and the heating temperature of the roll surface cannot be adjusted. To the constant temperature control, at the same time, the open flame combustion has a greater safety hazard to the rolled workpiece and rolling mill equipment

Another method uses thermocouple roller core heating. This method can achieve temperature control and online temperature supplement heating. The main disadvantage is that the hollow structure roll needs to be specially made. The hollow structure roll reduces the rigidity of the roll and cannot adapt to higher The process requirements of high rolling pressure, because the heating principle adopts thermocouple conduction heating, the heating speed is slow, and the roll preheating time is long, which reduces the production efficiency and temperature stability. The replacement and regrinding are limited by the structure, so it is difficult to implement and cannot meet the requirements of efficient production of modern rolling mills

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