Dynamic Analysis Of Non-sinusoidal Oscillator Of Mold Driven By Opposed Servo Motors

Mold non-sinusoidal vibration technology is one of the key technologies in modern continuous casting.Mold non-sinusoidal vibration because of the lower slab surface crease,improve the lubrication performance advantages are widely used in continuous casting equipment,this paper designed a servo motor drive with mold non-sinusoidal vibration device,it can be realized according to different working condition of non-sinusoidal vibration frequency and waveform of partial slope and the amplitude of online non-stop adjustment,improve the efficiency of the continuous casting.It is known from production practice that the vibration device with non-sinusoidal vibration law will produce more serious impact than the device with sinusoidal vibration law,so it is necessary to carry out dynamic analysis on the non-sinusoidal vibration device designed in this paper.In this paper,the generation principle of non-sinusoidal vibration waveform is described,and the displacement function of DEMAG non-sinusoidal vibration waveform is given.Taking DEMAG non-sinusoidal vibration waveform as an example,the shock principle and amplitude regulation mechanism of the non-sinusoidal vibration device designed in this paper are analyzed.According to the working principle of non-sinusoidal vibration device,the structure of the device is designed.The rigid-flexible coupling dynamics simulation model of the system was established by Solidworks,Ansys and Adams.The kinematics and dynamics simulation of the simulation model were carried out in turn.The preload of the buffer spring was optimized according to the stress of the vibration system.The influence of non-sinusoidal vibration parameters,i.e.waveform skew slope and mold amplitude,on the stress of key joints of mechanism was analyzed.The dynamic model of the system was established by means of lumped mass method,and the differential equation of motion was derived by Lagrange equation.The natural frequency and vibration mode of the system were solved and analyzed by means of instantaneous mechanism solidification method.The fourth order Runge-Kutta method is used to solve the differential equations of motion.The elastic response and dynamic response of the system under different working frequencies are analyzed in time domain.From the aspect of frequency domain,the variation curve of elastic displacement amplitude with working vibration frequency was obtained,and the elastic response under different working vibration frequency was analyzed.Finally,the influence of mold vibration waveform skew slope and mold amplitude on system elastic response was analyzed.