汽车车门拉延模具设计

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I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Dynaform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%，它的应用将越来越广泛。关键词：拉延成形;CAE分析；Dynaform软件：汽车车门拉延模具设计及成形模拟IIMolddesignandFormingSimulationoftheDrawingofCarDoorAbstractThistopicdoresearchonformingprocessparameterswiththecardoorinnerpanelastheobjectofstudy,andcommonsheetmetalforminganalysissoftwareDynaformasatoolstudied.DesignofthisprojectisthesignificanceofdrawingformingCAEanalysiscanpredictinadvancestampingproductdefects,helpingengineersandtechniciansonthedrawingformingprocessoptimizationtoreducerepairmoderepeatedlytryouttimes,shortenproductdesignandproductioncycle.ThemainworkcompletedthroughthecardoorforUGdrawingdiedesign,accordingtothestructuralcharacteristicsofthepartformingprocesstodevelopareasonable,usingsoftwareDynaformdeepdrawingprocessissimulatedviewsimulationresultssheetinflowsbasedonexperienceandrepeatedvalidationofthetestresultsandanalysis,re-setthecorrelationcoefficient,tofindthemostsuitableparametersettings.ThroughtheanalysisofDynaformsoftwaresimulationresults,wecanconcludethatsheetthickness,drawingbeadsdesign,BHFsize,thesizeofthedesignforming,stampingthenumberandintensityofsuchresultshasasignificantimpactonthesheetmetalforming.Onlythroughexperienceandconstantlyexperimentscanwefindoutthebestsolutionandgetthebestsimulationresults.ThemainusefulconclusionsofgraduationdesignisthattherealprocessofsheetmetalformingcanbesimulatedbyDynaformsoftware,inordertoavoidlabor-intensiveproductionprocessesandmaterialresourcestotestandtosavethecostlargely.CAENumericalanalysisandsimulationresultsarealsoveryaccuratesimulationinChinareached97%to100%inaforeigncountry,itsapplicationwillbemorewidelyKeywords:drawingforming;CAEanalysis;DynaformSoftware安徽工程大学机电学院毕业设计（论文）III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......................................21.3AUTOFORM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......................................................82.2.2Barlat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.........................................................193.1.1Dynaform初步处理..............................................193.1.2创建DIE........................................................193.1.3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.......................................................303.2.3Dynaform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/POST............................................334.2绘制变形过程.......................................................334.3成型极限图FLD.....................................................344.4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...................................................39：汽车车门拉延模具设计及成形模拟IV5.1.3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......................