| 冷弯成型是板材深加工的主要范畴，在工业范畴获得普遍应用。因为冷弯成型的机理还没有完整清晰，平日对它的研究只逗留在简略截面的公式推导和年夜量的假定前提下。跟着无限元技巧的成熟，可以经由过程贸易化无限元软件对其停止盘算机仿真，对其成型进程停止体系的实际剖析，为现实临盆应用供给指点。本文以南方工业年夜学电机工程研究所为法国DIRICKX企业设计的AXIS70冷弯成型临盆线为研究对象，对该截面成型进程停止无限元仿真和试验研究。目标是经由过程本案例的研究，摸索冷弯成型的工艺仿真手腕和办法，并将这些研究结果应用于临盆理论，促进对冷弯成型工艺的懂得。本文起首概述了冷弯型钢的特色、冷弯成型实际及盘算机仿真的研究停顿，引见了无限元的根本实际，联合课题对弹塑性无限元实际停止了归结和总结。本文在剖析AXIS70冷弯成型特色及变形纪律的基本上，以弹塑性年夜变形无限元实际为基本，法语论文，对该截面冷弯成型进程做出公道简化，在Msc。 Marc中树立了盘算机仿真的无限元模子，并胜利停止了数值模仿剖析。给出了每道次板材在轧辊中的现实截面参数与实际设计的截面参数的比较，得出了每道次的纵向应变、成型力的变更纪律。根据仿真成果，发明在部门道次纵向应变较年夜，易于招致发生边波缺点，并对该成型工艺提出了改良和优化的建议。经由过程对仿真数据和试验数据的剖析比拟，解释该成型工艺整体上是公道的。该临盆线的顺遂投产及法国方面满足的验收，法语论文，也进一步证实了本文模仿办法的有用性和靠得住性及盘算成果的准确性。 Abstract: Roll forming is the main category of sheet metal processing, widely used in industrial areas. Because the mechanism of cold roll forming is not complete and clear, on the research of this only stay in the formula and a large amount of short section assumes that the. Along with the infinite element skills mature, can through the process of trade of infinite element software carries on the computer simulation and a practical analysis on the forming process of the system of and for the actual production by provide guidance. This paper to South Industrial University electrical engineering research by having a design company in France of AXIS70 cold roll forming production line as the research object, on the cross section molding process stop infinite element simulation and experimental research. Goal is through the process of this case study, and explore cold roll forming process simulation means and methods and these research results were applied to the theory of birth, promote on cold roll forming process of understanding. This paper outlines the research in the characteristics of cold-formed steel, cold forming and computer simulation to a standstill, introduced the infinite element of basic theory, joint research on elastic plastic infinite element theory summed up. Based on the analysis of AXIS70 cold roll forming characteristics and deformation discipline basically, the elastic-plastic deformation of large infinite element theory, make reasonable simplification of the roll forming process in Msc. Marc has set up the infinite element model of computer simulation, numerical simulation analysis and stop the victory. Gives more realistic cross-section parameters per plate in the roller and the actual design section parameter, the longitudinal strain and forming force each time the change of discipline. According to the simulation results, the invention in the Department pass longitudinal strain is relatively large, easily lead to occurrence of edge wave and shortcomings, and improvement suggestions for the optimization of the molding process. By means of the comparison analysis of the simulation data and experimental data of the process, explain the whole forming process is reasonable. Smooth operation of the production line and France meet the acceptance of further confirmed the accuracy of the method in this paper to imitate the useful and reliable and calculation results. 目录: 摘要 4-5 Abstract 5 1 绪论 8-21 1.1 冷弯型钢的定义及特点 8-9 1.2 冷弯型钢的种类 9 1.3 冷弯型钢发展概述 9-11 1.3.1 国外冷弯型钢发展概述 9-10 1.3.2 国内冷弯型钢发展概述 10-11 1.4 冷弯型钢成型理论及计算机仿真国内外探讨进展 11-19 1.4.1 简化解析法 11-14 1.4.2 能量略论法 14-16 1.4.3 有限条法 16 1.4.4 有限元措施 16-19 1.5 本课题的来源、探讨的目的和意义 19-21 2 冷弯成形过程仿真的有限元理论 21-36 2.1 有限元概述 21 2.2 有限元的历史 21-22 2.3 有限单元法求解的基本步骤 22-24 2.4 弹塑性问题的有限元法 24-36 2.4.1 弹塑性理论基础 24-32 2.4.2 弹塑性本构关系 32-34 2.4.3 弹塑性有限元方程 34-36 3 冷弯成型过程仿真模型的建立 36-52 3.1 冷弯成型过程仿真的有限元特征 36-37 3.1.1 几何非线性 36 3.1.2 材料非线性 36 3.1.3 边界条件非线性 36-37 3.2 有限元仿真软件介绍 37-38 3.3 有限元软件Msc.Marc介绍 38-40 3.4 冷弯成型机介绍 40-41 3.5 冷弯成型的辊花图 41-43 3.6 冷弯成型截面变化规律简要介绍 43-46 3.7 有限元模型的几何参数 46-51 3.7.1 轧辊的几何参数 46-48 3.7.2 板材的几何参数 48-51 3.8 有限元模型的材料参数 51-52 4 冷弯成型过程有限元仿真结果略论 52-92 4.1 纵向应变略论 52-56 4.2 位移略论 56-88 4.3 各道次成型力略论 88-89 4.4 冷弯成型工艺总结 89-90 4.5 冷弯成型工艺改进 90-92 5 软件使用体会及有待进一步探讨的问题 92-94 5.1 使用MSC.Marc的体会 92-93 5.2 有待进一步探讨的问题 93-94 结论 94-96 参考文献 96-99 硕士期间所发表的论文 99-100 致谢 100 |
