Continuous Casting Mold Dynamics Analysis Of Non-Sinusoidal Oscillation

Mould oscillation was one of the key techniques in continuous casting. The oscillation mode experienced different stages, rectangular wave, trapezoidal wave, sine wave and non-sinusoidal wave appeared in succession. According to the different design requirements, the oscillation mechanism was gradually improved. The common oscillation mechanisms are four-bar-linkages mechanism, for-eccentric axes mechanism and electric hydraulic mould oscillating mechanism. There are many problems was unresolved in mechanical non-sinusoidal oscillation. For example, the modification ratio are not can be adjusted online, can't be adopted in the caster if the strand is short. Production practice shows that when non-sinusoidal vibration, in particular non-sinusoidal mechanical equipment sine shock is far more serious, and mold can be a very good resonance techniques to alleviate this problem.Based on the generating law of the DEMAG non-sinusoidal, This paper presents a simple structure, the modification ratio can be adjusted online, low investment in the non-sinusoidal oscillation mechanism driven by servomotor, gives its produce non-sine wave generated by the base management, and introduces the realizing method of the DEMAG non-sinusoidal waveform implementation.The Complex vector method was adopted to analysis the kinematics of the mold oscillating mechanism by the hypothesis of multi- rigid body in the article. According to a steel four-bar linkage vibration body diagram established by Adams vibration body simulation model of the kinematic simulation and error analysis; the dynamic simulation further, detailed discussion of the crystal resonator technology, analysis of the buffer spring force, the spring installation location, amplitude and waveforms of mold deflection rate on the hinge of force and torque.The dynamics model of the servomotor non-sinusoidal oscillation was established, and the kinematics differential function was deduced. From the nature frequency and the mode analysis, we can know that the nature characteristic of this equipment is better than that of the elliptic gear system, and is more easily to realize the optimal oscillation model.