Research On Intelligent CARD System From H-beam To Seecial-section Slab

Since the appearance of hot-rolled H beam in the first decade of this century , the rolling technology of H beam has been developed greatly. In comparison with the advance in H-beam rolling technology, the theoretical research is not thorough enough , especially in the theoretical research of H beam blooming process.The large cross-section and multi-variety H-beam is able to be produced by the method of splitting continuous casting slab, moreover, this method has been applied comprehensibly for its small investment and economization of energy. A series of thorough research work about the splitting method of continuous casting slab has been carried out by the author to develop the Computer Aided Pass Design system , so this dissertation is of significance to the research and application of the splitting method and the development of automation design.This dissertation can gain the size of profiled bar in any pass and design the proper pass by calculating the deformation and rolling-force of the steel in the pass . Firstly, the pass layout, rolling schedule , deformation mechanism are analyzed when the profiled bar rolled in the special section pass, moreover, the influence of speed difference on the steel deformation and inhomogeneous deformation are taken into account. Secondly, the distribution model for elongation coefficient is set up and the calculating formula for total pass number is derived, otherwise, this dissertation analyses the spread regularity during flange compressed in the pass and gets the spread model. Sequently, it makes certain the mechanical parameter model and finds the calculating formula about unit-pressure, resistance of deformation, pressure of rolling, roll torque. It analyses velocity schedule of two-roll reversible rolling mill and ensures how to get the cooling time-interval, therefore sets up the temperature model. The database is imported into calculating program to storage the result and establish corresponding statistics query system withStatistics Query Language, so this system make digital management more convenient and easier. The drawing model and the dimensioning model are developed by Utilizing the interface between Visual Basic 6.0 and AutoCAD2000, moreover, it sets up dimension state and drawing the frame and title panel by compiling program with Auto LISP Language.Applying comprehensively with theories of rolling H beam by splitting slab and idea of CARD , the object-oriented technology and database function of VB, the sophisticated function of AutoCAD in graph manipulation , this CARD System is provided with higher intelligent degree and good practicability.