【作者】 贾海亮；

【导师】 双远华；

【作者基本信息】 太原科技大学 ， 机械设计及理论， 2010， 硕士

【摘要】 我国钢铁产量已经连续多年位居世界第一,钢铁企业是国民经济的主要支柱,它的发展状况很大程度上反映了一个国家的实力。现代钢铁行业发展的一个着眼点就是提高钢材的质量。精整工序是保证冷轧产品质量的关键环节,高精度切边圆盘剪是板带精整作业线上的核心设备之一,其精度的高低直接影响着板带材的切边质量。本课题以中国重型机械研究院项目为依托,对切边圆盘剪的关键技术进行了研究。通过对切边圆盘剪的工作原理和剪切机理的研究,用有限元分析软件ANSYS/LS-DYNA建立了切边圆盘剪剪切钢板的有限元模型,并采用显式动力学有限元算法对剪切过程进行了模拟分析。分析了钢板剪切断裂的过程,得到了钢板的应力-应变变化,废边的运动规律,断裂区单元的应力变化,剪切后钢板宽度方向的塑性应变分布和剪切过程中的剪切力变化规律。并分析了重叠量、侧向间隙、剪切速度等工艺参数对剪切力的影响。设计了切边圆盘剪剪切力测试装置,并对剪切力进行现场测试。有限元模拟得到的剪切力与实测值和经验公式计算值差距很小,证实了有限元模拟结果的正确性。采用计算机仿真和实验相结合的方法来研究板带剪切过程,可以缩短剪切机的开发周期,降低生产成本。同时,本文采用的研究方法为剪切理论的进一步发展提供了新的研究手段。更多还原

【Abstract】 Our country’s steel output has ranked first in the world for many years, iron and steel enterprises are the main pillars of the national economy, its development largely reflects the strength of a country. The development of a modern iron and steel industry is to increase the focus of the quality of steel. Cold finishing process is the key to ensure the product quality, the precision cutting edge trimmer is one of the core equipment of a strip finishing line, its direct impact on the level of precision sheet and strip trimming quality.This subject takes China National Heavy Machinery Research Institute project as a backing, has conducted the research to key technologies of the cutting edge trimmer. As the study of cutting edge trimmer on the mechanism and shear principle, the cutting-edge steel plate shear finite element model has established by the finite element analysis software ANSYS / LS-DYNA, and using explicit dynamic finite element algorithm to simulate the process of shearing. The steel plate shear fracture process is analyzed, a plate of stress– strain is received, the movement rule of waste side, element stress change of fracture zone, the plastic strain distribution of sheared plate width direction and the change of shear force in the shearing process. And the impact of the parameters on shear force was analyzed, which includes overlap, side gap, cutting speeds and so on. A cutting-edge disc shear force testing equipment was designed, and shear force was tested. The gap of shear force among finite element simulation, the tested value and calculated value, the results confirmed the correctness of finite element simulation.Using computer simulation and experimental methods to study the strip shearing process, can reduce shearing machine development cycle, reduce production costs. Meanwhile, the research methods used in this paper provides a new means of research for the further development of shear theory.更多还原