Dynamic Behavior Simulation Of Mold Vibration Device For Large Slab Continuous Casting

In the actual production of iron and steel industry,the process of continuous casting of qualified molten steel into a certain size of billet through a special cooling device is called continuous casting.The continuous casting process improves the quality of billet and production efficiency.The heart of continuous casting equipment is the mold vibration device,in which the mold vibration device works smoothly to make the mold vibrate according to the predetermined curve to ensure the smooth stripping of billet and production operation.The crystallizer vibration of an enterprise continuous casting workshop device driven by double hydraulic cylinders,in a real production environment,because some uncertain factors such as system: clearance,out of sync,resulting in abnormal mold vibration,appear even vibration devices hydraulic cylinder piston rod broken,make the dynamic behavior of the system.Therefore,in order to explore the dynamic behavior of mold vibration device under different working conditions and find out the cause of hydraulic cylinder piston rod breakage is the main research content of this thesis,the following research work is planned in this thesis:(1)The structure and kinematics analysis of the mould vibration device for slab continuous casting were studied,and the condition that the mould vibration device meets the vibration law was discussed,which provided the basis for the modeling and simulation of the vibration system.Solid modeling of vibration system with Solid Works to complete interference inspection.Through to the crystallizer vibration displacement data reverse driving function for solving the hydraulic cylinder is deduced,and at the same time in the model import ADAMS in vibration mechanism between various components to add constraint and contact conditions,such as end up with the displacement data comparison with data of a practical,accord with the actual vibration system multibody dynamics model is established.The mold vibration system model was simulated to obtain the displacement,speed and force of the mold vibration device in the working process,and the dynamic characteristics of the mold vibration device under different driving speeds of hydraulic cylinders and different drawing speeds were studied.(2)Import the THREE-DIMENSIONAL simplified model of vibration system into ANSI Workbench;The whole machine model is simplified,and then the key parts of crystallizer,rocker arm,hydraulic cylinder,piston rod material setting,mesh division,adding constraints and loads and other steps,finite element analysis;And the transmission system modal analysis,the low order vibration mode diagram and the natural frequency of each vibration mode.By analyzing the data,the deformation and stress distribution of the whole mold vibration device in the working process were obtained,and the stiffness,strength and stability of each component of the mechanism were verified.At the same time,the maximum stress point under the working state of the hydraulic cylinder was found corresponding to the location of the actual production failure.Based on ADAMS and ANSYS co-simulation combined with field investigation,this thesis discusses the dynamic behavior of mold vibration device as a whole,simulates and analyzes the dynamic characteristics of mold vibration device under different working conditions,and finds out the cause of hydraulic cylinder failure,which provides guidance for the maintenance and use of field equipment.