Design Of Copper Forging Furnace And Research On Its Temperature Control Strategy

Making a copper forging furnace as the research object, the studies have been carried out in depth on innovative structure design based on energy-saving and on electrical system design based on function and on control strategies based on furnace temperature.An automatic feed continuous furnace was designed, which achieved automatic feeding by the elevator, range equipment and pusher; and constituted the furnace body structure with double tracks, electric components and heat insulator. The design of furnace body was based on energy-saving, including the choice of furnace materials, the layout of electric components and the design of heat insulator layers and so on. The heat insulator layers was analyzed and optimized by ANSYS finite element software, and an optimization scheme was proposed after the analysis of temperature and heat flow field of the furnace body. Finally, the accuracy and the reliability of the optimization scheme were verified by experiment.The electrical system of furnace was completed, including the function realization of automatic feed control, real-time examination and control of temperature and human-computer interaction on the hardware. Considering the complexity of the actual operating, this study added a function of malfunction self-monitoring, which mean when the common malfunctions such as material lacking, furnace wire broken, overheat and sensor damage occurred, the system would alarm automatically, and would prompt the users how to solve the problems as soon as possible.The temperature control strategy of which the goal was heating rapidly and non-overshoot was studied. Arrange transition course based BP-PID controller was presented. Simulation and experimental results show that this method could solve the contradiction between heating rapidly and non-overshoot well.The temperature control strategy which considering loading was studied. In the process of load in or out, furnace temperature would fluctuate badly, which affected the stability and precision of temperature control. Therefore, a disturbance observer based on the existing controller was presented. Simulation and experimental results show that the system has very strong inhibitory action to the large range of payload disturbances and its robust is improved greatly, after the disturbance observer is added. In order to increase the contrast, this study also arranged other strategy-fuzzy control strategy which was commonly used at present for comparison experiments, the results show that the fuzzy controller could only adapt to small range condition changes, in the performance of heating and against large range load disturbance, it is worse than the BP-PID controller which integrates the Arrange transition course and disturbance observer.