气缸盖罩组合冲压复合模具设计摘要冷冲压是一种常用的机械制造工艺，其材料利用率高，生产率高。当前柴油机气缸盖罩的材料均使用板件代替原先的铸铝件。为了提高其加工效率，降低生产成I本，设计了一套精拉深模具和一套冲孔切边复合模，并对其进行板件冲压成形工艺分析与冲压模具结构设计，采用计算机仿真技术模拟其成形过程，并根据模拟计算结果，改变坯料尺寸及形状、压边力和凸凹模圆角半径等工艺参数。设计中，在设计过程中，首先分析了零件的外形特征及工艺性，安排了成形工艺，计算了相关参数及工作尺寸，选择了冲压设备，进行了模具的具体结构设计，再利用三维设计软件Solidworks完成了拉深、切边模具和零件的几何形状造型，并运用dynaform仿真软件对冲压过程进行了模拟。通过分析得到的成形极限图，找出了模具设计中存在的问题，通过修改模具结构及工艺参数，使问题得以改善。关键词：气缸盖罩，冲压成形，拉深模具，冲孔模具,分析IIIAbstractStampingisakindofcommonmechanicalmanufacturingprocesswithhighmaterialutilizationandhighproductivity.Atpresent,Thepanelsubstitutedtheoriginalaluminumcastpart.Inordertoreducethecostofthedieselenginecylinderheadcover.First,Inviewofthestructuralcharacteristicsofthepart,weputforwardtheformingprocess.Thenwecalculatedthestructuralparametersandsize,selectedthestampingequipmentandspecifiedthestructureofthemold.Duringthedesignprocess,Firstly,Inviewofthestructuralcharacteristicsofthepart,weputforwardtheformingprocess.Thenwecalculatedthestructuralparametersandsize,selectedthestampingequipmentandspecifiedthestructureofthemold.Lastlyweuseathree-dimensionaldesignsoftwarecalledSolidworkstocompletethestructuredesignofthemoldanditsparts,andwealsouseDynaformsoftwaretosimulatetherealstampingprocess.BycheckingandanalyzingtheFLDdiagram,wefoundsomedefectsindesign.Lastly,bymodifyingthemolddesign,thosedefectshasbeensolved.Keywords：cylinderheadcover，deepdrawingdie,punchingdie，DynaformIIIII目录摘要...............................................................IAbstract.............................................................II目录.................................................................III第一章绪论.........................................................11.1课题的研究背景与意义............................................11.2课题主要设计内容................................................21.3课题主要设计任务................................................21.4课题主要设计步骤................................................2第二章冲压工艺与冲压设备..........................................52.1冲压工艺........................................................52.2冲压材料........................................................82.2.1冲压材料的选取原则.........................................82.2.2材料中主要元素对冲压性能影响..............................102.3模具材料.......................................................102.4冷冲压变形原理.................................................112.4.1塑性变形、变形抗力的概念.................................112.4.2影响金属塑性和变形抗力的因素.............................112.4.3冲压成形的应力和应变.....................................122.4.4塑性变形时应力与应变的关系...............................152.4.5冷冲压成形中的硬化现象...................................152.5冲压设备.......................................................172.5.1常用的压力机类型.........................................172.5.2冷挤压用压力机的要求.....................................172.5.3选用冲压设备...
