Non-sinusolid Vibration Study Of Continuous Casting Crystallizer Driven By Dual Servo Motors Based On PLC Control

Continuous casting technology is the core technology of the metallurgical industry,and the crystallizer is one of the important equipments of continuous casting technology.Crystallizer vibration technology is related to the quality and scale of cast billets produced in metallurgical plants.The main research direction of crystallizer vibration technology includes the development of crystallizer vibration device and vibration waveform law,while crystallizer vibration waveform control technology is another research hot spot in the field of crystallizer vibration technology.The study of this technology not only be of theoretical value,but also plays a crucial role in practical applications.In this paper,the following aspects are studied.In this paper,the following aspects are studied.Firstly,the mathematical models and basic parameters of the Demark vibration function,elliptical gear vibration function and five-segment vibration function are compared and analyzed,and the non-sinusoidal vibration of the crystallizer is realized by using the synchronous driving method of double servo motors.The mechanism of the nonsinusoidal vibration of the crystallizer realized by the two motion modes of the servo motor is analyzed.The angular velocity law of eccentric shaft rotation is deduced and calculated,and the servo motor speed variation law is obtained.Secondly,the control strategy was developed,a dual-servo motor reverse synchronous drive scheme was proposed,the advantages of vibration devices and drive methods were analyzed,and the servo motor rotational speed control program was designed.The dualservo motor synchronous drive control software was developed to realize the real-time synchronous drive control of the dual-servo motor variable angular speed rotation,and the HMI interactive interface for real-time monitoring by PC upper computer was designed to realize the real-time dynamic monitoring of the vibration waveform.The PLCSIM software was used to perform dynamic simulation to verify the accuracy of the realized nonsinusoidal vibration waveform.Finally,the control software was experimentally verified using a dual-servo motordriven crystallizer vibration test stand.The realized non-sinusoidal vibration displacement,velocity,and acceleration waveforms were measured,and the theoretical waveforms were compared with the actual waveforms for analysis.The experimental results show that the actual waveforms match with the theoretical waveforms,and the experimental equipment runs smoothly,the two motors are well synchronized,and the equipment deflection is small,which verifies the effectiveness and practicality of the control software.Through the research of this paper,it can be seen that the PLC-controlled dual-servo motor drive and crystallizer non-sinusoidal vibration technology has simple equipment,reliable operation,easy maintenance,online adjustment of process parameters,and the designed and developed dual-servo motor control software has high control accuracy,and this technology has broad application prospects and practical value..