Research Of Parament Measure And Control System Manufacture Of Double-roller Cast Machine

In the 21st century, Continuous casting technology of thin belt is an advanced and new technique in casting field. Through it, liquid metal can be directly processed to finished products or semi finished articles without cooling and reheat procedures. Relative to traditional technique, it is of more advantages and leads the trend of flat steel production tech, so it is the key technique of modern production in steel factories. The implementations of computer detect and control in the casting process make higher quality, lower cost and higher efficiency.The research of the checking and controlling system of parameter of the double-roller cast machines is the sub-project of the emphasis project---double-roller cast machine.The whole system is made up with hydraulic pressure system and electronic control system. The main task for electronic control system is to rebuild the current minitype double-roller cast machine into automation and to monitor the process of continuous casting technology including sample-data showing and controlling. It's useful to study the continuous casting technology of thin belt tech and what's the parameter effect on the process of the continuous casting and the final products. It's also helpful to raise the accuracy , to get better control performance, to accumulate the experience of continuous casting automatic control. It's another trying to put the automatic theory into practice and modernization. According to requirements and experiences, industrial computer, control instruments and operation desk compose the control system. Automatic, manual and hardware controls are available. The lower side controller is based on MCS51, and the upper side computer executes monitoring software programmed with VC++. Through a parallel port, upper and lower computers can exchange data with communication software. There are five parameters need to be measured. There are five channels for input: the displacement of casting-roller, the rotate speed of casting-roller, the pressure of casting and rolling, the casting temperature and the water-speed of cooling water. They are measured by raster, photoelectric coder, strain pressure sensor, thermocouple and turboflowmeter. There are three controlling signs for output: the displacement of casting roller, the casting temperature, the surface height of melting pool. The executing element for rotate speed is the frequency conversionadjustable-speed machine and the displacement and the surface height of the melting pool are controlled by the servo valve. The control algorithm is either PID whose parameters can be input and modified through interface or others.In additional, current motor timing system is advanced to frequency converting system.The system fulfills all functionalities in an intuitionistic and convenient way. After being worked stably and reliably in field for long time, the system has put into practical work.