低压铸造工艺设计毕业论文VIP免费

摘要本文运用反重力铸造技术—低压铸造来对铝合金铸件带轮的铸造工艺进行方案设计，包括分型面、浇注位置的选择、各项铸造工艺参数的确定以及浇注系统的设计。根据铸件形状较复杂的特点，在进行实验浇注时设计了两个浇注方案即两个内浇道或者一个内浇道，并同时进行调压和重力铸造浇注，以方便比较。根据实际零件建立了铸件的三维模型，并用View-cast铸造模拟软件对铝合金铸件带轮的充型过程进行了模拟计算。模拟结果显示，充型过程平稳，没有明显的液相起伏、飞溅。根据数值模拟结果并结合理论分析，铸件中没有缩孔、缩松等缺陷，铸造工艺方案和浇注工艺参数的设计合理。关键词：低压铸造；铸造工艺；实验浇注；充型过程；数值模拟IAbstractInthispaper,anti-gravitycastingtechnology,lowpressurecastingtechnologywasusedtocompletethedesignofthecastingofanaluminumalloycastingwheel,whichincludechoiceofSub-surfaceandcastingposition,determiningalloftheparametersofthecastingprocess,andthedesignofthecastingsystem.Forthecomplexshapeofthecasting,whenconductingexperimentswasdesignedtousetworunnersandoneingateforcastinginonetime,andatthesametime,surgeandgravitycastingwasusedtomakeiteasiertocompare.Forsandshellmoulding,themodeofsametimefreezingwasgenerallyused.BuildtheThree-dimensionalmodelofthecasting,thensimulateandcalculatethefillingprocessofcasting.Formtheresults,itwassawthattheprocesswassteadywithoutapparentphasefluctuationsorsplash.Fromtheresultwecanseethattherewasnodefectsuchasshrinkage,sothedesignwasperfect.Keywords：Lowpressurediecasting;castingprocess;experimentalcast;fillingprocess;numericalsimulation.II目录摘要.........................................................IAbstract......................................................II第1章绪论....................................................11.1低压铸造概述...............................................................................................................11.1.1低压铸造的工艺过程...................................11.1.2低压铸造的工艺特点...................................21.1.3低压铸造的工艺分类...................................41.2国外低压铸造行业的发展概况.................................................................51.2.1我国低压铸造行业现状、存在的问题和发展趋势.........................61.3低压铸造的数值模拟................................................................................81.3.1计算机数值模拟的优点.....................................................................81.3.2低压铸造与计算机数值模拟.............................................................91.4选题意义及本文的主要研究内容..........................................................101.4.1课题的意义.......................................................................................101.4.2课题的任务和内容............................................................................11第2章低压铸造工艺设计.......................................122.1低压铸造铸型工艺参数的选择.........................................................................................122.1.1铸件凝固方式的选择.................................................................................................132.1.2浇注系统的选择.........................................................................................................142.1.3浇注系统的选择.........................................................................................................152.1.4机械加工余量的选择....................................