Magnesium alloy strip roll induction heating method and device

Abstract

The invention relates to a technology for heating magnesium alloy plate and strip roll. A device for induction heating of magnesium alloy plate and strip roll comprises an inductor system, a temperature measurement system, a temperature adjusting system, an intelligent processing unit, and a PLC control system. The steps of the roll induction heating method comprises: firstly, setting target temperature of the roll and temperature difference allowed by a roll surface, starting the roll and the roll rotating; secondly, starting the inductor system, heating the roll surface of the roll to the target temperature; third, in the heating process, a thermodetector of the temperature measurement system detecting the temperature of the roll surface of the roll in real time, and transmitting real-time temperature data of the roll surface to an intelligent processing unit, the intelligent processing unit calculating the temperature, and sending a calculation result to a PLC control system; fourth, the temperature adjusting system and the inductor system regulating the temperature of the roll surface in real time according to the instruction sent out by the PLC control system. The method and the device can satisfy requirements of roll rapid heating and real-time temperature accuracy control, and ensure technological requirements for smooth warm rolling of magnesium alloy plates and strips.

Description

technical field [0001] The invention relates to a magnesium alloy strip roll heating technology, in particular to an induction heating method and device for a magnesium alloy strip roll. Background technique [0002] Magnesium alloy materials are known as "green engineering structural materials in the 21st century" due to their light weight, high specific strength, good shock absorption, good machinability, good anti-electromagnetic interference performance, and easy recycling. The material industry has broad application prospects. The United States, Germany, Australia, Japan and other countries have initiated research on a number of magnesium alloy materials and increased funding for magnesium alloy research projects. my country is rich in magnesium resource reserves. In view of the broad application prospects of magnesium alloy materials, a series of development plans have been issued, and a number of magnesium alloy strip casting and rolling projects have been funded. At...

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Problems solved by technology

Chinese patent CN200620022896.4 proposes the use of a heating and heat preservation device to place the rolls and magnesium alloy strips in a heating and heat preservation box to ensure the smooth running of the rolling process. This method of placing both the rolls and the strips in the furnace, It is not conducive to rolling operation and on-site observation, and it also brings great difficulty to the maintenance of the rolling mill. There are no adjustment measures and means for the temperature distribution of the rolls

Chinese patent CN200810088216.2 adopts a semi-open induction heating device, which occupies 1 / 2 of the roll surface, which is easy to interfere with other equipment of the rolling mill, and also causes many difficulties to the position adjustment of the roll and equipment maintenance

Chinese patent CN01135993.5 proposes another roll induction heating device. Four slidable inductors are arranged in the horizontal direction of the roll surface. The purpose is to uniform the radial temperature of the roll and increase the heating temperature by increasing the heating frequency. This heating device and method are not suitable for heating magnesium alloy strip rolls

[0004] In the above-mentioned patents, medium furnace, resistance furnace heating or induction heating are used for heating the rolls, among which the medium furnace is heated by gas combustion, which is not suitable for magnesium strips; the heating efficiency of resistance furnace is low, the heating time is long, and it is difficult to heat the rolls. Real-time and precise temperature control is not conducive to continuous and rapid production; the above-mentioned induction heating method, its heating method, device and temperature adjustment method do not meet the heating requirements of magnesium alloy strip rolls

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