Hydraulic vibration of continuous casting mould

Continuous casting crystallizer hydraulic non sinusoidal oscillation is greatly improve the surface quality of billet and increase the yield of important means, with casting machine varieties quality requirement unceasing enhancement, the high efficiency continuous casting demands urgent and of the crystallizer non sine vibration request will become increasingly urgent. But for a long time, because of the difficulty of the project technology, the high cost of investment, a long time can not be used in continuous casting technology, seriously restricted the casting level in China further improvement and product quality continue to improve. AEMETEC successfully launched the world's leading digital continuous casting machine mold level control system based on the successful introduction of the mold hydraulic non sinusoidal vibration system.

The friction force of the wall of the mould is considered to be the basic factor of tearing the shell and limiting the casting speed. A liquid slag film is existed between the shell and the mould wall, and the friction is viscous friction, that is, the friction force is proportional to the relative motion speed, and the viscosity of the slag film is inversely proportional to the thickness of the slag film. This caused in the crystallizer vibration is slipping during the friction and on shell stress is greater, the initial solidified shell cracking, for the development of a non sinusoidal oscillation technology to reduce the friction. Theoretical study and simulation results show that the appropriate choice of the non sinusoidal vibration parameters (skewness) can reduce the friction force between 50% and 60%.

??

AEMETEC hydraulic non sinusoidal vibration system, all the indicators have reached and exceeded the foreign advanced level. The system is very simple, without any other hydraulic servo elements, the existing hydraulic system of continuous casting machine oil source and oil source no special requirements, debugging is extremely convenient, almost make the box, which was well received by the user welcome, can meet the requirements of the use of slab, billet continuous casting machine.

The AEMETEC Advanced Industrial digital technology, conventional continuous casting machine through a simple transformation, the realization of the high frequency and small amplitude (400 times per minute) hydraulic non sinusoidal oscillation, skew rate reached 50% and all online parameters can be adjusted, is a necessary choice for continuous caster for high efficiency transformation.

This system has been successfully used in a number of iron and steel enterprises.