On-line heating device and heating method of magnesium alloy sheet warm rolling rollers

Abstract

The invention discloses an on-line heating device and a heating method of magnesium alloy sheet warm rolling rollers. The on-line heating device is composed of a heating furnace, a positioning device and a temperature control module, the heating furnace is fixed on a rolling mill stand through the positioning device, and the temperature control module is used for detecting the temperature in the heating furnace and regulating heating power in real time. The heating method includes: firstly sealing preheating is performed on a working roller until the temperature on the surface of the working roller reaches a target value, and thermal insulation is performed; the heating device is positioned, and simultaneously all supporting rollers and the working roller are moved to the position where normal temperature rolling of magnesium alloy is performed; trial rolling is performed on magnesium alloy blanks to obtain the optimum temperature value; and finally normal rolling is started, and heating at the ideal temperature is achieved through feedback control. The structure of an existing roller does not need to be changed, and solid rollers with high rigidity and strong reliability can be used; a scheme that normal heating is performed after sealing preheating is adopted to achieve rapid heating of the rollers; and a temperature control strategy with double-target temperature is adopted to obtain the ideal roller surface temperature.

Description

technical field [0001] The invention belongs to the technical field of plate warm rolling equipment, and in particular relates to an online heating device and a heating method for a magnesium alloy plate warm rolling roll. Background technique [0002] Magnesium alloy is a modern lightweight structural metal material with the characteristics of low density, high specific strength and specific stiffness, as well as excellent electromagnetic shielding, damping and shock absorption and machinability. It is widely used in aerospace, automotive and electronic products, etc. The field has broad application prospects. China is a country rich in magnesium resources, its reserves and export volume of primary magnesium both rank first in the world, but the production technology of magnesium alloy plates and profiles with high added value is backward. At present, most magnesium alloy products are formed by casting, especially die-casting process, and the rolling technology of deformed...

AI Technical Summary

Problems solved by technology

However, it is necessary to change the roll after heating with this device, and the work efficiency is not high; and because the temperature of the roll surface cannot be controlled during the rolling process, it is difficult to ensure the quality of the product

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