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Research Of A Dynamic Cooling Control For Beam Blank Con-cast

Posted on:2016-04-13Degree:MasterType:Thesis
Country:ChinaCandidate:T L LianFull Text:PDF
GTID:2191330479450852Subject:Mechanical engineering
Abstract/Summary:PDF Full Text Request
As an economic section steel, H steel is widely used in many industry such as transportation, construction, heavy equipment and so on, and it is in great demand on market. As a near net shape continuous casting product, rolling H-beam using beam blank has some significant advantages,such as low energy consumption, short process, high finished product rate and low cost. It is very necessary to develop beam blank key technology since beam blank production can not satisfy the market demand and the beam blank technology is immature in our country. Quality defects emerge more easily for beam blank during the production because of its complex cross-section shape. Whether the water distribute in secondary cooling section is reasonable or not is the most critical factor infecting the casting blank quality. So, it has great significance to study how to forecast the temperature in different sections for secondary cooling exactly and reasonably control the distribution of water for different sections.500mm×325mm×105mm beam blank was studied in this article and a 2D solidification and heat transfer model for the secondary cooling process of beam blank continuous casting was established base on the solidification and heat transfer theory. The 2D space region of the beam blank section was discretized by using the Non-Equidistant Grid, and the heat transfer equations was discretized base on the algorithm of explicit finite difference. The PID control model was established to control the beam blank temperature. A dynamic distribution of water control software was developed for secondary cooling process in beam blank continuous casting with Visual Basic 6.0.This software can simulate the process of the solidification and heat transfer for beam blank and present the beam blank temperature by methods of temperature variation curve and temperature contour while the casting speed and pouring temperature maintain a constant. When the casting speed and pouring temperature changed, this software can track, record and display the information of the beam blank in secondary cooling section and can dynamically distribute water flow rate for different sections of secondary cooling to maintain the stability of the temperature distribution of the casting blank. This software is very user-friendly, versatile and the simulation result proved that its control effects is desirable. The simulation result can optimize the design process for beam blank casting machine structure parameters and continuous casting process parameters.
Keywords/Search Tags:beam blank continuous casting, secondary cooling, FDM, dynamically distribute water flow rate, PID technology
PDF Full Text Request
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