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输油管接头的铸造工艺设计及其优化论文[带图纸].DOC

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输油管接头的铸造工艺设计及其优化论文[带图纸].DOC

西安文理学院物理与机械电子工程学院本科毕业设计(论文)题目输油管接头的铸造工艺设计及其优化专业班级08机械设计制造及其自动化(2)班学号08102080241学生姓名白粉毅指导教师何斌锋罗振元设计所在单位西安文理学院2012年05月输油管接头的铸造工艺设计及其优化摘要通过分析零件的结构和特点,选用粘土湿型砂手工造型方法,采用两箱造型并确定了浇注位置和分型面。确定了机械加工余量、起模斜度、铸造收缩率等工艺参数。根据各铸造工艺参数,用Pro/E软件画出铸件的3D图。根据铸件形状特点,设计了内腔处1、底部2两个砂芯。采用开放式中注浇注系统对铸件进行浇注,利用奥赞公式计算阻流截面积,确定浇注系统的各截面积和尺寸,并完成对冒口的初步设计。用ViewCast铸造模拟软件对未设冒口的的铸件进行凝固过程数值模拟,模拟结果显示所产生的缺陷与之前设想一致。采用顶部收缩冒口和两侧各圆柱形冒口对铸件进行补缩。再用ViewCast软件对带有冒口和浇注系统的铸件进行充型和凝固过程数值模拟,模拟结果显示浇注过程平稳,未出现紊流现象,铸件无缺陷。通过减小尺寸对冒口进行优化。关键词铸造工艺数值模拟凝固过程充型过程ThecastingprocessandoptimizationoftheoilpipeconnectorAbstractGreensandhandmodelingmethodwasselectedandtwoboxesofmodelingandsubsurfacewasdeterminedbyanalyzingthestructureandcharacteristicsoftheparts.Machiningallowance,fromthemodeslope,castingshrinkageprocessparameterswasidentifiedbyinquiryaboutdata.Pro/Engineersoftwarewereusedtodraw3Dsolidmodelingofthecasting.Twocoresbedesignedaccordingtothecharacteristicsofshapecastings,whicharetheinnercavity1andthebottom2cores.TheNotegatingsystemintheopencastingwasused.AustrianChanformulaswasusedtocalculatethecrosssectionalareaofthechokeanddeterminethesizeofthegatingsystem,andthecastingriserwasdesignedinitial.ViewCastcastingsimulationsoftwarewasusedtosolidificationprocessnumericalsimulationwithoutriserofcasting,thesimulationresultsshowthatthecastingdefectsagreementarisingbeforeassumption.Acontractionatthetopoftheriserandoneachsideofacylindricalriserwasusedforfeedingthecastingintheprocess.ThenViewCastsoftwareusedtofillingandsolidificationprocesstheriserandgatingsystemofcasting.Thesimulationresultsshowthat,thecastingprocessisstable,doesnotappearthephenomenonofturbulence,thecastingnodefects.Thesizeoftherevisingwasreducedtooptimization.KeywordsCastingprocessNumericalSimulationSolidificationprocessFillingProcess目录第1页目录第一章绪论..........................................................................................................................................11.1选题背景和研究意义................................................................................................................11.2本课题在国内外的研究状况及发展趋势................................................................................21.3主要研究内容...........................................................................................................................31.3.1铸造工艺研究................................................................................................................31.3.2浇注系统的设计............................................................................................................31.3.3补缩系统的设计............................................................................................................31.3.4用铸造软件模拟............................................................................................................3第二章铸件简述..................................................................................................................................52.1零件名称...................................................................................................................................52.2用途..........................................................................................................................................52.3材质..........................................................................................................................................52.4技术要求..................................................................................................................................6第三章铸造工艺方案.............................................................................................................................73.1工艺方法和说明........................................................................................................................73.2分型面选择..............................................................................................................................73.3浇注位置的选择.......................................................................................................................73.4型腔数量的设计.....................................................................................................................83.5砂芯设计................................................................................................................................83.5.1造芯方法与造芯数量...................................................................................................83.5.2砂芯的结构与尺寸.......................................................................................................93.6工艺参数................................................................................................................................103.6.1铸件的尺寸公差.......................................................................................................103.6.2铸件的质量公差.........................................................................................................103.6.3机械加工余量...........................................................................................................103.6.4铸件模样的起模斜度...............................................................................................113.6.5铸造收缩率...............................................................................................................113.6.6最小铸出孔及槽.......................................................................................................113.7浇注系统的设计.....................................................................................................................113.8冒口的计算............................................................................................................................13第四章铸件充型及凝固过程数值模拟.............................................................................................15目录第2页4.1ViewCast的实现过程........................................................................................................154.2铸造工艺方案的凝固过程模拟...........................................................................................154.3利用ViewCast软件设计冒口...........................................................................................174.4冒口的优化........................................................................................................................204.4.1凝固过程数值模拟.....................................................................................................204.4.2充冲型过程数值模拟.................................................................................................22结束语....................................................................................................................................................25致谢........................................................................................................................................................26参考文献................................................................................................................................................27附录...........................................................................................................................错误未定义书签。

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