走停式定宽机的运动仿真与优化

发布时间：2018-01-22 17:34

本文关键词： 定宽机运动分析有限元接触锤头优化　出处：《华北理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：走停式定宽机(SSP)是热轧生产线上发展起来的一种新型设备。它能够有效减少连铸区结晶器的规格,提高目标板坯的平面质量,提高了生产效率和板坯成材率,给热轧厂带来很大的经济效益。首先分析了定宽机的现状和发展趋势,通过各种调宽器的比较,分析了定宽机调宽的优势和存在的问题。为了研究定宽机的运动情况,对定宽机的机构和运作原理进行分析,为有限元的分析提供准确的边界条件。根据定宽机的运动要求和特点,对定宽机的控制系统加以分析,进行系统功能设计和软件设计以确保定宽机运动的准确性和稳定性。建立了定宽机的动力学模型,研究了动力学解决问题的方法。根据塑性大变形理论,分析解决定宽机侧压问题的方法。建立了定宽机的有限元模型,对板坯的侧压过程进行了仿真,根据板坯和锤头的应力分布云图和板坯的“狗骨”高度的数值,得到了板坯受力状况和变形规律。根据非线性接触理论,分析了板坯对锤头的冲击力。分析了锤头形状对“狗骨”高度的影响,从锤头三段占比和变形段形状改变两方面对锤头进行优化。并从“狗骨”高度的降低和锤头冲击力的减小两方面证明锤头工作面优化可靠。通过理论分析和模拟仿真的方法,对定宽机进行了系统的研究,为定宽机的研究提供了有效数据和理论指导。
[Abstract]:SSP is a new type of equipment developed in hot rolling production line. It can effectively reduce the mold specification in continuous casting area and improve the plane quality of the target slab. The production efficiency and slab yield are improved, and great economic benefits are brought to the hot rolling mill. Firstly, the present situation and development trend of the width fixing machine are analyzed, and the comparison of various width regulators is made. In order to study the movement of the width fixing machine, the mechanism and operation principle of the width fixing machine are analyzed. It provides accurate boundary conditions for the finite element analysis. According to the motion requirements and characteristics of the width fixing machine, the control system of the width fixing machine is analyzed. The system function design and software design are carried out to ensure the accuracy and stability of the motion of the fixed width machine. The dynamic model of the fixed width machine is established, and the method of solving the dynamic problem is studied, according to the theory of large plastic deformation. The finite element model of the fixed width machine is established, and the lateral compression process of the slab is simulated. According to the stress distribution cloud diagram of slab and hammer head and the height of dog bone of slab, the paper establishes the finite element model of the fixed width machine and simulates the lateral compression process of the slab according to the stress distribution cloud diagram of slab and hammer head and the value of "dog bone" height of slab. According to the nonlinear contact theory, the impact force of the slab on the hammer head and the influence of the shape of the hammer head on the height of the dog bone are analyzed. The hammerhead is optimized from two aspects: the proportion of the three segments of the hammer and the shape change of the deformed segment. The reduction of the height and the reduction of the impact force of the hammer head prove the reliability of the optimization of the hammerhead face. The method of theoretical analysis and simulation is used. A systematic study on the fixed width machine is carried out, which provides effective data and theoretical guidance for the research of the fixed width machine.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG333

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