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1、安徽工程大学机电学院本科毕业设计（论文）专 业： 机械设计制造及其自动化 题 目： 汽车车门拉延模具设计 与成形模拟 作 者 姓 名： 导师及职称： 导师所在单位： 机械与汽车工程学院 汽车车门拉延模具设计与成形模拟摘 要本课题把汽车覆盖件车门内板作为研究的对象，以常见的板料成形分析软件Dynaform作为工具对拉延成形工艺参数进行研究。本课题设计的意义是拉延成形CAE分析可以提前预测冲压产品的缺陷，帮助工程技术人员对拉延成形工艺进行优化，以减少反复试模修模的次数，缩短产品的设计和生产周期。完成的主要工作有通过UG对汽车车门进行拉延模具的设计，再根据零件的结构特点制定合理的成形工序，采用Dyn
2、aform软件对拉深成形过程进行数值模拟，查看模拟结果中的板料流入量，根据经验和反复对试验结果的验证与分析后，重新设定相关系数，找到最合适的参数设置。通过Dynaform软件的模拟仿真结果的分析，板料的厚度，拉延筋的设计，压边力的大小，成形的尺寸设计，冲压的次数与力度等对板料的成形结果都有很大影响，要想获得最理想的仿真结果，只有通过经验和不断地实验才能找出最佳方案。本毕业设计的有用结论主要是用Dynaform软件可以模拟板料成形的真实过程，从而避免生产过程耗费很大的人力物力财力去试验，很大程度上节约成本。CAE数值分析仿真结果也十分准确，在中国仿真率达到97%，在国外达到100%，它的应用将越
3、来越广泛。关键词：拉延成形;CAE分析；Dynaform软件Mold design and Forming Simulation of the Drawing of Car DoorAbstractThis topic do research on forming process parameters with the car door inner panel as the object of study, and common sheet metal forming analysis software Dynaform as a tool studied. Design of this pr
4、oject is the significance of drawing forming CAE analysis can predict in advance stamping product defects, helping engineers and technicians on the drawing forming process optimization to reduce repair mode repeatedly tryout times, shorten product design and production cycle. The main work completed
5、 through the car door for UG drawing die design, according to the structural characteristics of the part forming process to develop a reasonable, using software Dynaform deep drawing process is simulated view simulation results sheet inflows based on experience and repeated validation of the test re
6、sults and analysis, re-set the correlation coefficient, to find the most suitable parameter settings.Through the analysis of Dynaform software simulation results, we can conclude that sheet thickness, drawing beads design, BHF size, the size of the design forming, stamping the number and intensity o
7、f such results has a significant impact on the sheet metal forming. Only through experience and constantly experiments can we find out the best solution and get the best simulation results.The main useful conclusions of graduation design is that the real process of sheet metal forming can be simulat
8、ed by Dynaform software, in order to avoid labor-intensive production processes and material resources to test and to save the cost largely. CAE Numerical analysis and simulation results are also very accurate simulation in China reached 97% to 100% in a foreign country, its application will be more
9、 widelyKeywords: drawing forming; CAE analysis; Dynaform Software目 录引 言1第1章 绪论21.1冲压数值模拟技术的研究现状及发展趋势21.2 冲压模具CAE数值模拟分析的目的21.3 Autoform软件简介31.4 课题研究的主要内容41.5 课题的研究方案61.6 本章小结：6第2章 汽车覆盖件拉延成形理论72.1 汽车覆盖件拉延成形有限元仿真理论概述72.2 汽车覆盖件拉延成形数值模拟有限元理论82.2.1 几何非线性82.2.2 Barlat屈服准则92.2.3 汽车覆盖件冲压成形单元模型112.2.4 有限元控制方程
10、的求解162.5 本章小结18第3章 基于DYNAFORM模面前处理与参数设置193.1 模面前处理193.1.1 Dynaform初步处理193.1.2创建DIE193.1.3 创建PUNCH零件层223.1.4 创建BINDER零件层233.1.5创建BLANK零件层253.1.6 板料成形设置263.1.7 凸凹模、压边圈定位283.2 参数设置293.2.1 设置工序、控制参数293.2.2 动画预览303.2.3 Dynaform求解器计算303.3 本章小节32第4章 CAE分析数值模拟仿真结果334.1 读入结果文件到ETA/POST334.2 绘制变形过程334.3 成型极限图
11、FLD344.4 厚度变化情况364.5 录制AVI成形过程374.6 本章小结38第5章 拉延模结构设计395.1 拉延模工作部分计算395.1.1 凸模圆角半径395.1.2凹模圆角半径395.1.3 凹模工作深度计算405.1.4 凹凸模间隙405.1.5 凹凸模横向尺寸及公差415.2其他零部件的设计与选用425.3 拉延模比和高度的计算425.4 模具主要零部件设计425.4.1 凸模部分：425.4.2 凹模部分：435.4.3 压边圈部分445.4.4 装配部分445.5 本章小结45第6章 结论与展望46附录B 英文文献及翻译49附录C 主要参考文献的题录及摘要57插图清单图1
12、-1 汽车门内板零件- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4图1-2 汽车覆盖件拉延成形数值模拟技术路线图 - - - - - - - - - - - - - - - - - - - - - - - - - - 5图2-1 应变的度量 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8 图2-2 BT单
13、元局部共转坐标系- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -12图3-1 车门IGES曲面- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -19图3-2 显示选项 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14、 - -19 图3-3 当前零件层- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -19 图3-4 网格划分 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 20图3-5 单元选项框一- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
15、- - - - - - - - - - - - - - - - 20图3-6 曲面网格划分结果- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 20图3-7 网格检查后的缺陷- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -21图3-8 模型修补工具 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 22图3-9 创建单元- - -
