【作者】 尹学霞；

【导师】 肖宏；

【作者基本信息】 燕山大学 ， 机械设计及理论， 2003， 硕士

【摘要】 中厚板产品广泛应用于油气输送管线、船舶、桥梁、容器、锅炉、海洋构件、建筑等国民经济的众多领域。在中厚板生产中，提高成材率是节省能源与资源，降低成本的重要手段，成材率的高低直接影响到企业的经济效益。平面形状控制技术是中厚板生产的一项关键技术，可以大幅度提高中厚板成材率，我国目前尚未充分掌握该项技术，有待于积极开发。本文首先回顾了国内外中厚板生产平面形状控制的研究情况；系统阐述了弹塑性有限元法基本理论；在多次考察秦皇岛中板厂实际生产线的基础上，以提高中厚板成材率为目的，以不同轧制规程下中厚板的平面形状变化为研究对象，采用数值分析和物理实验相结合的方法，对中厚板轧制中平面形状的变化规律进行了研究。根据展宽比的不同，制定了8种典型的轧制规程，分别采用大型商用有限元软件MARC进行了从板坯到成品的轧制全过程模拟，分析了轧件金属在不同典型道次中的流动行为。通过比较各种轧制规程下的平面形状，得到了成材率最高和生产率及成材率综合较好的轧制规程。最后以铅为材料，在燕山大学轧钢实验室二辊轧机上进行了物理实验研究，验证了数值模拟结果的正确性及准确性。本课题对于中厚板平面形状控制的研究工作在理论上为提高我国中厚板行业的成材率奠定了必要的基础。更多还原

【Abstract】 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.更多还原