沈阳理工大学课程设计摘要拉深是利用模具使平板毛坯变成为开口的空心零件的冲压方法,用拉深工艺可以制成筒形、阶梯形、锥形、抛物面形、盒形和其他不规则形状的薄壁零件,其中又以筒形件简单和多见,而有凸缘筒形件又分为宽凸缘和窄凸缘件。在拉深工艺设计时,必须知道冲压件能否一次拉出,这就引出了拉深系数的概念。拉伸系数决定于每次拉深时允许的极限变形程度。在多次拉深中,对于宽凸缘拉深件,则应在第一次拉深时,就拉成;零件所要求的凸缘直径,而在以后各次拉深中,凸缘直径保持不变。为了保证以后拉深时凸缘不变形,宽凸缘拉深件首次拉入凹模的材料应比零件最后拉深部分实际所需材料多3%~5%,这些多余材料在以后各次拉深中,逐渐将减少部分材料挤回到凸缘部分,使凸缘增厚,从而避免拉裂。关键词:拉深;成型工艺;拉裂I钢制零件的冲压工艺分析及模具设计TheairoutletvalvecoverstherammingcraftandthemolddesignAbstractThedeepdrawingisapressingprocess.Itcanmakeasheetblankintoauncorkpiecewithdie.Aprocesswithdeepdrawingcanmanufactureworkpieceinmanyshapes.Andthetapperedworkpiecewhichincludesbroadprotrudingedgeworkpiecesandnarrowprotrudingedgeworkpiecesisthemostusual.Thecoefficientofthedeepdrawingisimportantwhenyouhavetobesurewhetheritcanmakeitinonetime.Thecoefficientliesonthelimitofthedeformationdegreeeverydeepdrawingprocessallows.Keywords:deepdrawing;formingprocess;restrictioncrackII沈阳理工大学课程设计目录摘要.........................................................IAbstract................................................................II1绪论.............................................................12拉深件的工艺性分析....................................32.1分析工件的冲压工艺性............................32.2.1工件形状...........................................32.208F材料的化学成分和机械性能.................43拉深工序计算...............................................53.1阶梯形筒形件的拉深工序计算原则..........53.1.1阶梯形件拉深工序计算程序...............53.2必要的工序计算......................................53.2.1修边余量δ的确定.............................53.2.2毛坯尺寸计算....................................53.2.3判断阶梯筒形部分的拉深次数............73.2.4确定工件的制造工序步骤...................83.2.5画出拉深工序图.................................94工序压力计算和压力机的选择.....................114.1压力机的选择原则.................................114.2落料拉深工序压力计算..........................114.2.1排样图的设计...................................114.2.2计算落料拉深复合工序压力..............154.2.3初选压力机......................................174.2.4校核压力机的电动机功率.................184.3二次拉深工序压力计算..........................204.3.1计算二次拉深工序压力.....................204.3.2初选压力机......................................214.3.3校核压力机的电动机功率.................224.4扩口力计算...........................................234.4.1计算扩口工序压力............................234.4.2初选压力机........................................24III钢制零件的冲压工艺分析及模具设计4.3.3校核压力机的电动机功率.................255模具结构设计.............................................265.1落料拉深工序模具设计..........................265.1.1落料拉伸复合模选用原则.................265.1.2模具工作部分尺寸和公差计算..........265.1.3模具其他零件的结构尺寸计算..........285.2二次拉深工序模具设计..........................325.2.1模具结构形式选择............................325.2.2模具工作部分尺寸和公差计算..........335...