轻型输送带挤出复合生产技术研究及其辊压压花成型数值模拟

发布时间：2019-05-18 14:43

【摘要】：目前,国内轻型输送带加工方法生产效率低下,加工成本高,对环境造成了一定的污染,对工人身体有较大的毒害。本文结合挤出复合生产技术和轻型输送带结构特点,将挤出复合技术应用到轻型输送带的生产上,研究开发出了国内第一条轻型输送带挤出复合生产线。该生产线效率高,自动化程度高,加工成本低,环境污染小,在生产宽幅轻型输送带和食品级输送带方面有着独特的优势。本文根据轻型输送带挤出复合生产技术专利和生产线设计、安装和调试的工作内容,详细介绍了轻型输送带挤出复合生产技术的生产流程以及生产线主要组成设备；总结了复合制品在挤出复合成型过程中可能出现的质量问题以及导致产生这些质量问题的可能原因,并根据这些质量问题和可能产生原因对生产线的工艺参数控制作了细致深入的研究说明；分析探讨了轻型输送带挤出复合生产技术的优势和缺点。本文还利用有限元软件ANSYS 12.0/LS-DYNA对轻型输送带辊压复合中的辊压压花成型过程进行了仿真分析。研究确立了轻型输送带辊压压花成型非线性显式动力有限元分析的分析方法,并对仿真分析过程中的关键技术和关键参数设置进行了研究说明。根据仿真分析结果,通过对单个钉齿成型过程、节点X-Displacement曲线、厚度(X)方向位移场和制件有效塑性应变场、有效应力场的分析,研究了挤压量、辊压温度、辊压速度等工艺参数对辊压压花成型制件填充状况、制件几何形状变化情况、制件塑性变形发展状况和制件中残余应力分布状况等的影响,从而对认识轻型输送带辊压压花成型机理有着重要作用,对优化辊压压花成型的模具形状、工艺参数和提高输送带制品质量有着重要的指导意义。
[Abstract]:At present, the production efficiency of domestic light conveyor belt processing method is low, the processing cost is high, which causes certain pollution to the environment and has great toxicity to the workers' health. In this paper, according to the extrusion composite production technology and the structural characteristics of light conveyor belt, the extrusion composite technology is applied to the production of light conveyor belt, and the first domestic light conveyor belt extrusion composite production line is studied and developed. The production line has the advantages of high efficiency, high degree of automation, low processing cost and low environmental pollution. It has unique advantages in the production of wide light conveyor belt and food grade conveyor belt. According to the patent of light conveyor belt extrusion composite production technology and the design, installation and debugging of light conveyor belt extrusion composite production line, this paper introduces in detail the production process of light conveyor belt extrusion composite production technology and the main composition equipment of the production line. The possible quality problems of composite products in the process of extrusion composite molding and the possible causes of these quality problems are summarized. According to these quality problems and possible causes, the process parameter control of the production line is studied and explained in detail. The advantages and disadvantages of extrusion composite production technology for light conveyor belt are analyzed and discussed. In this paper, the finite element software ANSYS 12.0/LS-DYNA is also used to simulate and analyze the roll embossing process in the roll pressing composite of light conveyor belt. The analysis method of nonlinear explicit dynamic finite element analysis of roll embossing of light conveyor belt is established, and the key technology and key parameter setting in the process of simulation analysis are studied and explained. According to the results of simulation analysis, through the analysis of single nail tooth forming process, node X-Displacement curve, thickness (X) direction displacement field, effective plastic strain field and effective stress field, the extrusion quantity and roll pressing temperature are studied. The effects of rolling speed and other technological parameters on the filling condition, geometric shape change, plastic deformation development and residual stress distribution of the parts, etc., are affected by the filling condition of the parts, the change of the geometric shape of the parts, the development of plastic deformation of the parts and the distribution of residual stress in the parts. Therefore, it plays an important role in understanding the roll embossing mechanism of light conveyor belt, and has important guiding significance for optimizing the die shape, technological parameters and improving the quality of conveyor belt products.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH222

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