Study On Plan View Pattern Control Of Mid-Thick Plate By Simulation

The plate products are widely used in many fields such as pipeline of petroleum and natural gas, shipping, bridge, container, boiler, oceanic component, construction and so on. Increasing product yields by reducing crop losses is one of the most prominent ways to save energy consumption and reach cost down purpose, which largely affects the enterprise economic interests. The objective of plan view control is to achieve the final plate pattern as rectangular as possible, thus improving plate yield, by optimizing the rolling schedules. This technology is undeveloped in our country and worthwhile to carry out systemic investigation.In this study, the research progress of plan view control technology is reviewed and summarized. The fundamental theory of elastoplastic finite element method (FEM) is given. Based on the investigation of the actual production performance of Qinhuangdao Plate Mill Plant, the rolling process mathematic models of eight typical rolling schedules are established, the plan view patterns according to different rolling schedules are analyzed by numerical simulations and experiment tests. The plate rolling processes, from forming pass to finishing pass, with different rolling schedules are simulated by the famous finite element analysis software, MARC, aimed to investigate the metal deformation behaviors and the plan view pattern changing history during rolling. The best rolling schedule for maximum yield has been obtained after the analysis and comparison of eight typical rolling schedules. On the two high mill in the Rolling Lab of Yanshan University, the numerical results are examined by physical simulations with lead specimen. It shows that they meet each other quite well. The results have provided valuable information on the setup of rolling schedule in the plate production. This study is meaningful for reducing defective edge shape and improving the production yields on both theory and practice.