Study On Non-sinusoidal Oscillation Of Double-servo Differential Gear Train Continuous Casting Mold

Continuous casting mold non-sinusoidal oscillation technology is recognized as the key technology for achieving efficient continuous casting and occupies a dominant position.Based on the high-performance servo motor as a power source has gradually become the trend of non-sinusoidal crystallizer driving equipment,a new scheme for non-sinusoidal oscillation of crystallizers with double-servo motors has been proposed,the derivation of the oscillation law and the calculation of the process parameters were completed.Based on the research and development of double-servo motors drive equipment,through the dynamic analysis of the drive system,the optimized design of the double-servo drive equipment was completed.This paper clarifies the mechanism of non-sinusoidal waveforms in the eccentric shaft swing mode,and realizes online adjustment of non-sinusoidal oscillation parameters by controlling the swing parameters of the eccentric shaft.The amplitude,frequency and waveform deviation of the three basic oscillation parameters of the crystallizer are the original variables,the velocity function of the eccentric mechanism is constructed,the non-sinusoidal oscillation waveform of the crystallizer is deduced,and the control model is established to simulate the process parameters.A double-servo motors drive equipment capable of constructing a non-sinusoidal waveform is proposed.Servomotors are one-way constant speed and one-way variable speed rotation.The rotational speed of the motors directly relates to the oscillation parameters of the mold,and the operating rules of the servomotor are given,and on-line adjustment mechanism of crystallizer's oscillation parameters.The dynamics analysis of the double-servo drive system was carried out,and the equivalent load model was established.The dynamic model of the entire crystallizer oscillation system was constructed using the Lagrange's second type equation,and the dynamic response and dynamic model were studied.The servo motors power optimization calculation and transmission system structure optimization provide the theoretical basis.Finally,taking a steel billet caster as an example,the design flow of the double-servo drive system was explained and the feasibility of the double-servo drive system was verified.