Method for stimulating continuous casting crystallizer to perform non-sinusoidal vibration by swing type eccentric shaft

Abstract

The invention discloses a method for stimulating a continuous casting crystallizer to perform non-sinusoidal vibration by a swing type eccentric shaft, and is suitable for vibration devices under the swinging operation mode of eccentric shafts. The method comprises the following steps: the amplitude of the crystallizer, the frequency of the crystallizer, and the waveform deviating rate of the crystallizer are independent variables; the speed of the ascending section of the crystallizer, and the speed of the descending section of the crystallizer are respectively represented by two functions; the function curves of the ascending section and the descending section are smoothly connected and meet the requirement that the ascending displacement is equal to the descending displacement. Through the adoption of the method, the acceleration curve of waveforms is continuous, and the dynamics performance is good; no impact is generated during operation; the vibration parameters, such as the amplitude, the frequency and the waveforms, as the original parameters of the waveforms, can be directly adjusted, so that on-line automatic control is convenient.

Description

technical field [0001] The invention relates to the field of continuous casting, in particular to a method for controlling the non-sinusoidal vibration of a continuous casting crystallizer excited by a swing-type eccentric shaft. Background technique [0002] Continuous steel casting has the obvious advantages of saving energy, greatly improving the metal yield and casting slab quality. During the process of pouring molten steel into the mold, the mold must vibrate according to a certain rule to ensure the lubrication conditions of the casting slab and the mold , so as to prevent the breakout accident caused by bonding between the crystallizer and the new slab shell. With the in-depth understanding of various complex physical mechanisms between the slab and the mold, non-sinusoidal vibration is recognized as the optimal waveform for high-efficiency continuous casting. Non-sinusoidal vibration waveform is an important problem in continuous casting production. Currently, the...

AI Technical Summary

Problems solved by technology

However, at present, the waveform generator composed of eccentric shaft connecting rods, because the eccentric shaft rotates continuously in one direction, it is difficult to change the eccentricity online, and the corresponding crystallizer amplitude is not suitable for adjustment.

In related technologies, such as the Chinese patent application number 201210291325.0, it discloses a device that excites the non-sinusoidal vibration of the crystallizer through the oscillating operation of the eccentric shaft. The amplitude of the crystallizer can be controlled by adjusting the swing angle of the eccentric shaft. Motion mode, this invention effectively solves the problem that the waveform generator of the eccentric shaft connecting rod cannot adjust the amplitude online, but this invention only discloses a device structure that can realize the swing of the eccentric shaft, and does not discuss the operation mode of the swing type eccentric shaft Compatible non-sinusoidal vibration waveform

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