Study Of Online Simulation And Supervisory Optimization In Metallic Work's Heating Process

The heating process of metallic work is an important part of many technologies such as heat treatment, pressure process and so on. The heating process is usually realized in various industrial furnaces. At present the supervisory control method of heating process widely used is that, the specified point temperature in furnace—furnace temperature is used to be taken as metallic work's temperature indirectly, to roughly monitor and control the heating rate ,uniformity and terminal temperature. Because the heating process is influenced by many complex factors, relations between the furnace temperature and metallic work's temperature are very indefinite. Therefore, this kind of roughly monitoring technology will bring series of questions, thus influence heating quality, efficiency and energy consumption.In order to solve this problem, this article proposed the technology of online simulation and supervisory control of heating process of metallic work. It uses metallic work's surface temperature as the boundary condition to simulate the interior temperature field of metallic work, by which it can infer the microstructure and stress field. It uses phase structure field to monitor and control the terminal temperature, and uses stress field to monitor and control the heating rate online.This article takes the 45~# steel cylinder work as the object of study, establishes the mathematical model of online simulation and supervisory control of heating process, which is discreted by finite different method, and carried on the solution operation with the MATLAB7.4 software coding.Based on this, this article designs the experiment scheme, and actually builds experiment platform which is composed of metallic work, electric resistance mill furnace, the temperature sensor, temperature signal collect instrument and microcomputer. And this system is applied in the actual heating process to monitor and control the heating technology. At the same time, comparing the heating technology under the online simulation and supervisory control technology with the traditional one , the result proves that the former one's heating effect is better than the latter's, the former one's efficiency is higher and the former one's energy consumption is lower. This technology have larger technological progress effect, application value and popularization prospect.