已阅读5页,还剩3页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1CylinderblockmachiningprocessdesignEnginepartsengineblockisamorecomplexstructureofsparepartsbox,itshighprecision,complexprocess,andtheprocessingqualitywillaffecttheoverallperformanceengine,soithasbecometheenginemanufacturersfocuspartsone.TechnicalCharacteristicsoftheenginecylinderblockCylindercastforawholestructure,anditsupperpart4cylindermountinghole;cylinderstandardcylinderisdividedintoupperandlowerdivisionsintotwoparts;cylindertotherearofthefront-sidearrangementofthepreviousthreecoaxialmountingholeofthecamshaftandtheidleraxlehole.Cylinderprocessfeaturesare:thestructureofcomplexshape;processingplane,morethanholes;unevenwallthicknessandstiffnessislow;processingofhighprecisiontypicalofbox-typeprocessingpart.Themainprocessingofthesurfaceofcylinderblocktopsurface,themainbearingside,cylinderbore,themainandcamshaftbearingboreholesandsoon,theywilldirectlyaffectthemachiningaccuracyoftheengineassemblyprecisionandperformance,mainlyrelyonprecisionequipment,industrialfixturesreliabilityandprocessingtechnologytoensurethereasonableness.1.EngineblockprocessdesignprinciplesandthebasisforDesignTechnologyprogramshouldbetoensureproductqualityatthesametime,givefullconsiderationtotheproductioncycle,costandenvironmentalprotection;basedontheenterprisesabilitytoactivelyadoptadvancedprocesstechnologyandequipment,andconstantlyenhancetheirleveloftechnology.Engineblockmachiningprocessdesignshouldfollowthefollowingbasicprinciples:(1)Theselectionofprocessingequipment,theprincipleofselectionadoptedtheprincipleofselectionadoptedtheprincipleofcombiningrigid-flexible,processingeachhorizontalmachiningcenterislocatedmainlysmalloperationswithverticalmachiningcenter,thekeyprocessacrankhole,cylinderhole,balancershaftholeHigh-speedprocessingofhigh-precisionhorizontalmachiningcenter,anupperandlowernon-criticalprocessesbeforeandafterthefour-dimensionalhigh-efficiencyroughmillingandhaveacertainadjustmentrangeofspecialmachineprocessing;(2)focusonakeyprocessinprincipleprocessthebodycylinderbore,crankshafthole,BalanceShaftholesurfacefinishingandthecombinationofprecisionmillingcylinderhead,usingaprocessfocusedonasetupprogramtocompleteallprocessingelementsinordertoensureproductaccuracyThekeyqualityprocessestomeetthecylindercapacityandtherelevant2technicalrequirements;Accordingtothetechnologicalcharacteristicsofautomobileenginecylinderblockandtheproductionmandate,theengineblockmachiningautomaticproductionlineiscomposedofhorizontalmachiningcenterCWK500andCWK500Dmachiningcenters,specialmilling/boringmachine,verticalmachiningcentersmatec-30Landotherappliances.(1)topandbottom,andtilecoveredonlythecombinationofapertureroughmillingmachinededicatedtothismachinetodouble-sidedhorizontalmillingmachine,usingmovingtabledrivenparts,machinetoolsimportedSiemensS7-200PLCsystemcontrol,machinecontrolcabinetsetupanindependent,cuttingautomatetheprocessiscompletedandtwokindsofautomaticandadjustthestate;(2)high-speedhorizontalmachiningcentermachiningcentercanberealizedCWK500themaximumflowofwetprocessing,butbecauseofequipment,automaticBTAtreatmentsystemthroughthebuilt-intrayunderthewide-typechipconveyorandthecompletionofthemachiningcentercanbedryprocessing;machinetoolspindlespeed6000r/min,rapidfeedingspeed38m/min;(3)Thecombinationoffrontandrearfaceroughmillingmachinetoolusinghydraulictransmission;controlsystemimportedSiemensS7-200PLCsystemcontrol,machinetoolshaveacertainflexibility;(4)ThespecialmachineTXK1500thismachineverticalmachiningcenterbythemodificationofshape,withverticalmachiningcenterfeaturesandperformance,thismachinehashighstrength,highwear-resistant,highstability,highaccuracy,high-profileetc.;(5)high-speedverticalmachiningcentermatec-30Lofthemachiningcenterspindlehighspeed9000r/min.ControlsystemusesSiemensSINUMERIK840Dcontrolsystem;(6)high-speedhorizontalmachiningcenterspindleCWK500Dhighestspeed15000r/min.2.EngineblockmachiningprocessdesignthemaincontentEngineblockcomplexstructure,highprecision,argesize,isthin-walledparts,thereareanumberofhighprecisionplaneandholes.Engineblockmachiningprocesscharacteristics;mainlyflatandtheholeprocessing,processingofflatgenerallyuseplaning,millingmethodssuchasprocessing,processingofholeusedmainlyboring,processingandmulti-purposedrillingholes.Asthecylindercomplexstructure.sohowtoensurethatthemutualpositionofthesurfaceprocessingprecisionisanimportantissue.3.1TheselectionofblankEngineblockonthematerialsusedaregenerallygraycastironHT150,HT200,HT250,thereisalsocastaluminumorsteelplate,thisengineblockusinghigh-strengthalloycastiron.Cylinderintheprocessingpriortoagingtreatmentinordertoeliminatestressandimprovetheroughcastingmechanicalproperties.Improvetheroughaccuracy,reductionofmachiningallowance,istoimprovetheautomatedproductionlinesystemproductivityandprocessingqualityoftheimportantmeasures.Asthe3foreignbox-typepartsofroughqualityandhighprecision,anditsproduction-linesystemhasbeenimplementeddirectlyontheblankline,notonlyeliminatingtheneedforblankcheckdevicealsosavestheroughqualityproblemsduetowasteofmachiningtime,increaseoverallefficiency.Therefore,therefinementofroughistoimprovetheproductivityofthemostpromisingwayout.Fortheengineblockproductionline,canberoughinpartson-linepre-millingsixface,removingmostofthemargin,tofacilitatedirecton-lineparts.3.2MachiningprocessselectionandprocessingofthebenchmarkChoosetherightprocessingtechnologybaseisdirectlyrelatedtotheprocessingqualitycanensuretheparts.Generallyspeaking,processbenchmarkingcanbedividedintocoarseandfinereferencebase.(1)Thebaselinefortheon-linethickrough,whichisparticularlyimportantthechoiceofbenchmarkcrude,ifcrudebenchmarkchoiceunreasonable,willtheunevendistributionofmachiningallowance,processingandsurfaceoffsets,resultinginwaste.Inthecylinderproductionline,wehaveadoptedforthecoarsesideofthebase;(2)Refinedthebaseofthisboxfortheengineblockparts,thegeneraluseofsidetwosalesforafullrangeofuniformbenchmarks,Forthelongerautomatedproductionpositioning,therefore,willbedividedinto2-3segmentpinholesused.Inthecylinderpinholeoftheprocess,wehaveadoptedtotheside,bottomandthespindleholepositioning,intheprocessingcenterontheprocess.3.3MachiningProcessingStagesandprocessesofthearrangementsOftenapartofmanyapparentneedforprocessing,ofcourse,thesurfacemachiningaccuracyaredifferent.Processingofhighprecisionsurface,oftenafterrepeatedprocessing;Asfortheprocessingofthesurfaceoflowprecision,onlyneedtogothroughoneortwoonthelist.Thus,whenthedevelopmentprocessinordertoseizetheprocessinghighprecisionsurface,thisconflict,thereasonablearrangementprocessesandrationaldivisionstageofprocessing.Arrangetheorderoftheprincipleofprocessis:afterthefirstcoarserefined,thefirstsurfaceafterthehole,thefirstbenchmarkother.Intheengineblockmachining,thesameshouldfollowthisprinciple.(1)roughingstageengineblockmachiningprocess,thearrangementsforroughingprocess,tofullycarryoutroughrough,trimmostofthemargininordertoensureproductionefficiency;(2)semi-finishingphaseoftheengineblockmachining,inordertoensuretheaccuracyofthemiddleofsomeimportantsurfaceprocessing,andarrangesomesemi-finishingoperations,willberequiredaccuracyandsurfaceroughnessofthesurfaceofthemiddleofsomeprocessingtocomplete,whiledemandingthesurfaceofsemi-finished,toprepareforfuturefinishing;(3)Thefinishingstageofrequiringhighaccuracyandsurfaceroughnessofthesurfaceprocessing;(4)secondaryprocessing,suchassmallsurfacescrewholes,youcanfinishofthemajorsurfaceaftertheonehand,whentheworkpiecedeformationprocesslittleimpactatthesame4timealsoreducedtherejectionrate;Inaddition,ifthemainsurfaceofawaste,thesesmallthesurfacewillnothavetobeprocessed,thusavoidingawasteofman-hours.However,iftheprocessingisveryeasyforasmallsurfacebumpsthemainsurface,itshouldbeplacedonasmallsurfacefinishpriortothemainsurfacefinishing;(5)shouldmakeproperarrangementsforsecondaryprocessessuchasproductinspectionprocess,inpartroughingstage,thekeyprocessbeforeandafterprocessing,sparepartsalltheprocessinghasbeencompleted,shouldbeappropriatearrangements.Stageofprocessingdivision,hasthefollowingadvantages:First,itcantakemeasurestoeliminatetheroughworkpieceafterthestress,toensureaccuracy;second,finishingontheback,andwillnotdamageduringtransportthesurfaceoftheworkpiecehasbeenprocessed;again,firstroughingthesurfacedefectscanbedetectedearlyandpromptlydealwithrough,donotwasteworkinghours.Butmostsmallparts,donotsubverythin.3.4cylindersurfaceofthemainprocessingandsecondaryprocessesCylindersurfaceandsupportthemainprocessingoperationsare:(1)planeprocessingatpresent,themillingofengineblocksistheprimarymeansofplanarprocessing,domesticmillingfeedrateisgenerally300-400mm/min,andforeign2000-4000mm/minmillingfeedratecomparedtofarcry,tobeonincreasing,therefore,improvethemillingfeedrate,reduceoverheadtimeistoimprovetheproductivityofthemajormeansoffinishinganumberofplaneengineblockwhenthemillingfeedratetoreach2399mm/min,greatlyimprovedefficiency;Topsurfaceofthecylindermillingisakeyprocessintheprocess,theflatnessrequirementsfor0.02/145mm,thesurfaceroughnessofRa1.6um.Processinginthecylinder,theuseofsideandspindlebearingborepositioning,top,bottomandmiddlevagayonlyaperturewhileprocessingusedintheprocessinglineoutsideofthekni
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 2024-2034年中国蔬菜行业供需分析及发展前景研究报告
- 妇产科学-异位妊娠练习题
- 多人股东合作的协议书(25篇)
- 安全生产管理规章制度和操作规程清单
- 学雷锋月国旗下讲话稿(20篇)
- 有关语文教案范文7篇
- 小学法制课精彩讲话稿(4篇)
- 管理公司建议书(4篇)
- 非诉讼事务委托代理协议(10篇)
- 设备施工合同合集(5篇)
- 千万工程心得体会教师范文(通用3篇)
- 沙堆里的城隍ppt
- “课程思政”理念下的小学Scratch课程案例设计研究
- 安全管理体系
- 湖南省常德市澧县2022-2023学年八年级下学期期中历史试题
- 电动切割机操作规程及安全注意事项
- 拆装一级圆柱齿轮减速器实验报告-答案
- 23年秋季国家开放大学《企业现场管理专项能力认证培训》 形考任务1-4、终考答案及题目
- 工程机械租赁发展趋势分析报告
- 中国企业的人力资源管理分析
- 2022年黄鹤楼科技园(集团)限公司招聘【37人】上岸笔试历年难、易错点考题附带参考答案与详解
评论
0/150
提交评论