Development And Design Of Automatic Pouring Device For Aluminum-iron High-temperature Continuous Casting Line

As a key process of continuous casting production,pouring has an extremely important impact on improving the output and quality of castings.Pouring process control is a key element of pouring stability.In order to replace the traditional manual pouring and break through the small capacity limitation of the existing automatic pouring machine,a set of simple structure,easy to control fixed-point constant flow automatic pouring device was designed and developed for the deoxidized aluminum iron ingot continuous casting production line.This article mainly conducts related research on realizing the automatic pouring function of fixed point and constant flow rate of the device,development and therefore pouring device includes means designed pilot portion and the technical part,as follows:First,the working principle of the tilting pouring device is introduced in detail,the influence of the ladle rotation position on the pouring performance,and the advantages and disadvantages of the design of the hydraulic cylinder position are analyzed;combined with the actual high temperature operating environment and the feeding problem,a ladle separation type is designed pouring device;a constant flow rate during the casting is based on the existing hydraulic subsystem and the control subsystem is optimized to improve the design,improve accuracy of the casting;Secondly,mathematical modeling of the ladle pouring process is carried out.By analyzing the relationship between melt pouring flow and ladle tilt angle,the law of change between pouring flow and hydraulic cylinder piston rod displacement is obtained,and the preliminary work is prepared for the realization of equal flow pouring control;In addition,detailed analysis and mathematical modeling of the working principle of the asymmetric hydraulic cylinder in the hydraulic control technology of the pouring device are carried out,and it is analyzed that the valve-controlled hydraulic cylinder has a certain degree of influence on the control accuracy due to the structure and load.Therefore,on this basis,a compensation control method is proposed to improve the control accuracy of asymmetric hydraulic cylinders;Based on the research of the hydraulic control technology of the pouring device,according to the characteristics of low-speed dumping and quick resetting of the ladle of the pouring device,a hydraulic control system with a large flow gradient is designed,and a corresponding compensation controller is designed for the asymmetry of the hydraulic cylinder.A joint simulation platform built by the Simulink module of MATLAB software and AMEsim software is used to simulate the control of a single hydraulic cylinder.The simulation results show that the fuzzy compensation PID control based on variable universe achieves high-precision tracking response under large load disturbances,and the accuracy is within 5mm,which can effectively meet the control requirements for asymmetric hydraulic cylinders;For the same control structure of the double cylinder in the cylinder based on the optimization of the controller,a control structure of a design of a synchronous cross-coupled,with bias displacement between the two hydraulic cylinders feedforward compensation,the load is not achieved in Motion synchronization function under conditions of balance,system uncertainty and unclear interference.At the same time,in order to further improve the movement synchronization of the two-cylinder electro-hydraulic proportional control system in the movement process,the synchronous PID controller is applied to the forward feedback channel of the synchronization deviation to improve the movement synchronization performance.The simulation results show that this control method can realize the synchronous movement of two independent linear motion electro-hydraulic actuators driven by a single oil source;Finally,by inspecting the quality of the aluminum and iron ingot products poured by the pouring device,the effectiveness of the tilting automatic pouring device is verified from the side,and the expected design requirements are met.