Visual System Of Mould Temperature Field Based On The Virtual Instruments

Steel-leakage is one of the most serious accidents in the production process ofcontinuous casting. The temperature of the mould copper can be measured by thethermocouple embedded in the mould，that realizes the mould temperature monitoring andsteel-leakage prediction. This system has inherent disadvantages, that its prediction onlyjudged by the value thermocouple measured, and can’t get the entire temperature field of themould. Thus the breakout forecast effect was affected. Mould is one of the most importantequipments of continuous casting production. The quality of slab was directly influenced bythe heat transfer and temperature field in the mould. The deep research on the temperaturefield of mould to ensure the safety and improve the casting quality in the production processof continuous casting is very necessary. Through the research of the mould copper heattransfer in slab continuous casting mould, temperature field mathematical model wasestablished and the visualization system for temperature field of mould was realized withvirtual instrument LabVIEW and finite element analysis software ANSYS. The systemprovides a more effectively method for the breakout forecast and it realizes the real-time dataacquisition of the temperature and ANSYS numerical calculation of temperature field at thesame time.This paper is consists of five parts: temperature field mathematical modelreconstruction of the mould, virtual instrument data acquisition system design, temperaturefield finite element solution of the mould, visual system development of the temperaturefield and the analysis of the operation results. Firstly, we ascertain the initial condition andboundary conditions and physical parameters of the slab through the analysis heat transferprinciple to build the temperature field heat transfer model of the mould. Secondly, dataacquisition system consists three parts: the LabVIEW data acquisition, the data storage andthe write APDL file. Data acquisition module is responsible for collecting mouldthermocouple temperature data in copper. Data storage module is responsible for datastorage. The thermocouple temperature data is written in APDL file using the form ofvariable by the LabVIEW acquisition. Thirdly, temperature field finite element analysis ofthe mould. In this part, it mainly introduced the temperature field solving method of themould. Thermocouple data collected and the initial conditions and boundary conditions asthe loads were loading into the temperature field mathematical model of the mould for finiteelement analysis. Fourthly, design the visualization system for temperature field of mould. According to the finite element model of the temperature field, using software toolsLabVIEW to realize temperature field visualization of the mould. The fifth part, analyzes thetemperature field distribution of the mould under the different drawing speed, and come upwith regularity of the temperature field distribution of the mould.Temperature field visualization system can make up the shortage of the steel-leakageprediction system, and at the same time, it can offer a method that the operator can observethe status of mould operation more intuitively. So it can be enough to understand the statusof the internal mould and control continuous casting production more effectively.