Roller center heater of magnesium alloy board

Abstract

A core heater unit for the roller used for afterheat rolling of Mg-alloy plate is composed of the mechanical system consisting of a pair of hollow rollers, supporting frame and bearings and the temp control system comprising power supply, transformer, temp controller box, a pair of metallic heating rods arranged in said hollow rollers, and electro-thermal couple. Its advantages are high temp accuracy and high productivity.

Description

technical field [0001] The invention belongs to the technical field of warm rolling equipment for magnesium alloy strips, and in particular provides a roll core heating device for warm rolling magnesium alloy strips. Background technique [0002] Magnesium alloy is the lightest among modern metal structural materials, with a density of about 1.7g / cm 3 , about 1 / 4 of steel and 2 / 3 of aluminum. Magnesium is abundant in the earth's crust and seawater, and China is especially rich in magnesium resources, ranking first in the world. The advantages of magnesium alloys are low density, high specific strength and specific stiffness, good shock absorption, and excellent casting performance, cutting performance, thermal conductivity and electromagnetic shielding ability, and are widely used in automobile manufacturing, aviation, Aerospace, optical instrument manufacturing and national defense and other fields. Therefore, magnesium-based materials are considered to be the most poten...

AI Technical Summary

Problems solved by technology

[0004] At present, the methods to ensure the surface temperature of the warm rolling rolls of magnesium alloy strips are not very ideal. One method is to directly heat the roll surface through a combustion heat source, remove the combustion device when the heating reaches a certain temperature, and then carry out warm rolling. The disadvantages of this method are: low energy utilization rate; continuous heating of the rolls during the rolling process cannot be guaranteed, the surface temperature of the rolls changes greatly during the rolling process, and the heating temperature of the rolls is uneven; the work efficiency is low, and every once in a while It is necessary to stop rolling and heat the surface of the roll

Another method is to use rolls to roll other high-temperature metals (such as high-temperature steel materials) before rolling to increase the surface temperature of the rolls, but this method has the same disadvantages as the first method and cannot satisfy production requirements

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