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液压泵盖工艺工装设计开题报告 号编号无锡太湖学院毕业设计(论文)料相关资料题目 液压泵盖工艺工装设计信机系系机械工程及自动化专业学号 0923172学生姓名 王烨锋指导教师 鲍虹苏(职称 高工)(职称 )xx年5月25日 目目录
一、毕业设计(论文)开题报告
二、毕业设计(论文)外文资料翻译及原文
三、学生“毕业论文(论文)方案、进度、检查及落实表”
四、实习鉴定表 无锡太湖学院毕业设计(论文)告开题报告题目 液压泵盖工艺工装设计信机系系机械工程及自动化专业学号 0923172学生姓名 王烨锋指导教师 鲍虹苏(职称 高工)(职称 )xx年11月12日 课题自拟题目科学依据(包括课题的科学意义;国内外研究概况、水平和开展趋势;应用前景等)
(1)课题科学意义液压泵盖的机械加工工艺及普通夹具、液压设计为本课题的研究内容,对此研究查阅的大量的资料,首先明白机械加工工艺过程就是用切削的方法改变毛坯的形状、尺寸和材料的物理机械性质成为具有所需要的一定精度、粗糙度等的零件为了能具体确切的说明过程,使工件能按照零件图的技术要求加工出来,就得制定复杂的机械加工工艺规程来作为生产的指导性技术文件,学习研究制定机械加工工艺规程的意义与作用以及普通夹具、液压夹具的设计就是本课题研究目的
(2)研究状况及其开展前景目前中国制造业开展迅猛,以前的我国制造业普遍使用刚性专机加工各种各样的零部件,导致改型和生产个零部件周期较长随着我国制造业开展和各种各样零件的需求与日俱增,加工设备和工艺也向着柔性化的方向转变加工装备的柔性概念和需求主要表达在对设备快速性和适应性的需求上,因此制造商不得不寻求柔性和产量之间的最正确组合 现在常采用研究传统切削加工机理的实验统计方法来了解特种加工的工艺规律,以便实际应用,但还缺乏系统性受其限制,目前特种加工的工艺参数只能凭经验选取,还难以实现最优化和自动化 夹具是机械加工不可缺少的部件,在机床技术向高速、高效、精密、复合、智能、环保方向开展的带动下,夹具技术正朝着高精、高效、模块、组合、通用、经济的方向开展其中液压夹具的主要优势是能节省夹紧和松卸工件时所花的大量的时间有关统计资料说明液压夹紧相比机械夹紧节省90%~95%的时间,缩小了生产循环周期,从而增加了产量也就意味着降低了本钱液压夹具系统的第二项重要特点是可实现非常高的定位精度关键在于夹紧力在定位和夹紧过程中保持恒定不变从而确保了同一道工序下的加工质量一致性由于变形造成的废品率将会微乎其微 研究内容
①我们必须仔细了解零件结构,认真分析零件图培养我们独立识图能力增强我们对零件图的认识和了解通过对零件图、三维图的绘制还能增强我们的绘图能力和运用AutoCAD、PRO/E软件的能力
②制订工艺规程、确定加工余量、工艺尺寸计算、工时定额计算、定位误差分析等
③我们还必须考虑工件的安装和夹紧.安装的正确与否直接影响工件加工精度安装是否方便和迅速又会影响辅助时间的长短从而影响生产率夹具是加工工件时为完成某道工序用来正确迅速安装工件的装置它对保证加工精度、提高生产率和减轻工人劳动量有很大作用这是整个设计的重点也是一个难点 拟采取的研究方法、技术路线、实验方案及可行性分析根据不同的研究对象拟采用不同的研究方法,本课题包括两方面内容液压泵盖零件工艺及夹具设计
(1)制定工艺规程的研究途径和可行性分析毛坯的选择;拟订工艺路线;计算切削用量、加工余量
(2)夹具设计的研究途径和可行性分析夹具设计最关键是要求对工件定位正确,且满足定位精度要求然后采取措施解决具体的问题如定位基准与定位元件的配合状况和影响定位精度,那么可以提高夹具的制造精度,减小配合间隙就能提高夹具在机床上的定位精度 研究方案及预期成果研究方案 xx年11月12日-xx年12月25日按照任务书要求查阅论文相关参考资料,填写毕业设计开题报告书 xx年1月11日-xx年3月5日填写毕业实习报告 xx年3月8日-xx年3月14日按照要求修改毕业设计开题报告 xx年3月15日-xx年3月21日学习并翻译一篇与毕业设计相关的英文材料 xx年3月22日-xx年4月11日液压泵盖零件工艺 xx年4月12日-xx年4月25日两副夹具设计 xx年4月26日-xx年5月25日毕业论文撰写和修改工作 预期成果 做好所要求的所有内容,包括液压泵盖零件工艺以及普通夹具、液压夹具设计,对机械制造工艺作更多的了解,也可以稳固大学所学到关于机械的知识,同时也可以稳固自己的CAD画图,学校PRO/E画图,希望以后对自己工作有用 特色或创新之处
①选择了最好的零件加工工序,夹具设计也具针对性,对工件生产更有帮助
②稳固了AutoCAD画图,同时也学会了PRO/E的根本操作 已具备的条件和尚需解决的问题
①液压泵盖零件的工艺思路明确,夹具的设计也得当
②液压这块还需作更多的了解,PRO/E软件用的不熟悉 指导教师意见指导教师签名 年月日教研室(学科组、研究所)意见教研室主任签名 年月日系意见主管领导签名 年月日 英文原文CMachiningProcessFirstourcountryshistoryofthedevelopmentofnumericalcontrolsystem
1.Ourcountrysince1958byagroupofresearchinstitutescollegesanduniversitiesandafewstartedtoCMachineToolPlantoftheresearchanddevelopmentsystem.Atthattimeduetothelowlevelofdomesticelectronicponentssuchasthedepartmentofeconomicconstraintslackofalargerdevelopment.
2.InthereformandopeningupChinasnumericalcontroltechnologygraduallyachievesubstantialdevelopment.After6581----85yearstheintroductionofforeigntechnology7586------90yearsofthedigestionandabsorptionandtheEighthFive-YearPlan91~1-95yearsNationalOrganizationofscientificandtechnologicalthatmakesourcountrysCtechnologyhasaqualitativeleapinaeptanceatthattimethroughresearchandidentificationofcountryproductsincludingBeijingEverestsChineseIcentralChinascentralNCIandafewhigh-endShenyangNationalEngineeringResearchCenterforControlofBlue-IaswellasotherthroughtheNationalQualitySupervisionandTestCentermachinetestNCsystemofqualifieddomesticpaniessuchasNanjingfourproducts.
3.ChinasCmachinetoolmanufacturingindustryinthe80shadthestageofrapiddevelopmentmanymachinetoolplantproductsfromtraditionalproductstotheNCtransition.Butgenerallyspeakingthetechnologicallevelisnothighthequalityofthepoorsointheearly90sfacingthecountryseconomyfromaplannedeconomytoamarketeconomyandadjustthetransferwentthroughthemostdifficultyearsoftheDepressionperiodtheproductioncapacityatthattimedownto50%morethanfourmonthinventory.From1995NinthFive-YearPlantoexpanddomesticdemandfromthecountryafterthemachinetoolmarkettostartsoastoreinforcetheapprovalofimportsofCequipmentinvestmentfocusedonsupportforkeynumericalcontrolsystemequipmenttechnologiesofCequipmenthasplayedasignificantroleespeciallyin1999thecountrysdefenseindustrytocivilianindustryandthekeytoputtinginalotoftechnicaldepartmentfundstoenableCequipmentmanufacturermarketthriving.ThreeCTechnologyandEquipmentofcarscutCLatheMachiningLathetechnologyandprocessingtechnologysimilartobutbecauseofClatheisafixtureforautomaticprocessingofallfinishturningprocesswhichshouldpayattentiontothefollowingaspects.
1.Areasonableselectioncuttingforthehigh-efficiencymetal-cuttingprocessingtheprocessedmaterialscuttingtoolscuttingconditionsisthethreemajorelements.Thesedeterminetheprocessingtimetoollifeandprocessingquality.Cost-effectiveprocessingmethodsmustbeareasonablechoiceofthecuttingconditions.Threeelementsofcuttingconditions:cuttingspeedfeedrateandcuttingdepthofthedamagedirectlycausedbythetool.Withtheincreaseincuttingspeedtooltiptemperaturewillrise;willhavemechanicalchemicalthermalwearandtear.20%increaseincuttingspeed;toollifewillreducethe1/
2.Feedconditionsandtherelationshipbetweentoolwearandtearatthebackofaverysmallareaof.Howeverthefeedratecuttingtemperaturerisewearbigbehind.Thantheimpactofcuttingspeedontoolsmall.Depthofcutonthetoolsdidnotaffectthecuttingspeedandfeedratebutatsmallcuttingdepthofcutwhencuttingmaterialshavebeen hardenedlayerwhichwillaffectthetoollife.Theuserisprocessedaordingtothematerialhardnesscuttingstatusmaterialtypefeedratecuttingdepthsuchastheoptionofusingthecuttingspeed.Themostappropriateselectionsofprocessingconditionsareatthebasisofthesefactorsisselected.Haverulesstabilitywornandtearistoachievetheidealconditionsforlife.Howeverinactualoperationtheselectiontoollifeandtoolwearthesizeofchangesinprocessingsurfacequalitycuttingnoiseheatprocessingandsoon.Indeterminingtheprocessingconditionsrequiredtostudytheactualsituation.Theheat-resistantalloyssuchasstainlesssteelandhardmaterialsthecoolantcanbeusedbesttouserigidblade.
2.Reasonableselectiontool1whenroughitisnecessarytochoosehighstrengthgooddurabilitytoolinordertomeettheroughknifewheneatinglargebackvolumethefeedrequirements.2Finecaritisnecessarytochoosehighprecisiondurabilitygoodtooltoensurethattherequirementsofmachiningauracy.3Inordertoreducetoolchangetimeandconvenienceoftheknifeshouldbeusedmachinesandmachinefolderknifeblade.
3.AreasonableselectionFixture1Generalselectiontrytheworkpiececlampingfixturetoavoidtheuseofadedicatedfixture;2positioningthebasepartsoverlapsoastoreducethepositioningerror.
4.Todeterminetheprocessingrouteprocessingrouteistheindex-controlledmachiningprocesstoolpartsrelativetrajectoryanddirectionofSports.1Shouldbeabletoensurethemachiningauracyandsurfaceroughnessrequirements;2shouldtrytoshortentheprocessingroutereducingtraveltimeandairknives.
5.ProcessingrouteofcontactwithallowanceAtpresentClatheshavenotyetachievedtheuniversalaesstoconditionsthegeneralshouldbeputontoomuchroughmarginespeciallywithforgingcastinghardcushioncortexingenerallatheprocessing.MustbesuchasClathetheneedtopayattentiontoprocessflexibility.
6.FixturetoinstallthemainpointsatpresentthehydraulicclampingchuckandhydrauliccylinderareconnectedbytherodoftheimplementationinFigure
1.Hydraulicclampingchuckasfollows:FirstofallbymovingonhandtounloadthenuthydrauliccylinderthedischargeofSLIDEandback-endfromthespindleoutandthenmovethehandstounloadscrewchuckcanbedisposedofunderthechuck.FoureffectivelyturningareasonableSaveprocessingtimeIndexTurningCentersG200integratedprocessingunitwithamodularhigh-powertwo-axislinkageaxisfunctionthusfurthershorteningtheprocessingtime.Withothermeansofjob-axisoppositetotheconceptofclampingtheuseoftheproductcanbeintegratedintelligentprocessingunitinplacesothattheworkpiececlampingandautomaticprocessing.Inotherwordstheautomaticsetupwillnotbeaffectedbytheprocessingofanotheraxisafeaturethatcanbeshortenedabout10%oftheprocessingtime.InadditiontheFourprocessingveryquicklyyoucansimultaneouslyhavetwoprocessingtool.Whenthemachineisputintouseinpairstheefficiencybeesmoreapparent.Inotherwordstheconventionalhardturningandsettingtwocarscanparallelmachine.Turningconventionalvehiclesandhardwaredifferencesbetweenthetooland focusedonlyinthecoolantsystemthermostat.Howeverconventionalprocessingisdifferent:bothcanbeusedconventionalprocessingandatoolcarrierforprocessingTailstock;andhardwarewhenusingatoolonly.InbothtypesofmachinetoolscanbecarriedoutontheharddryprocessingonlythemanufacturerstechnologyprogramdesignedtobalancetheneedtobeattimeandIndexofthemodulestructureofmachinetoolstoprovidethemwithgreaterflexibility.Toimprovetheproductivityofhigh-precisionwiththecontinuousimprovementofproductionefficiencytheuseralsomadeforaveryhighauracyrequirements.TurningCenterG200usedforprocessingthecoldstartuptofourpartsprocessingrequiredtoachievetolerancesof±6mm.Processingprocesstheauracyisusuallymaintainedat2mm.Indexsomadeavailabletothepanysclientsarehigh-precisionhighefficiencytheintegrityoftheprogramandprogramstoprovidesuchhighprecisionrequiringcarefulchoiceofspindlebearingsandotherfeatures.G200TurningCenterLandshutGermanyBMWcarfactoryintheapplicationofthepanyachievedgoodresults.Theplantisnotonlytheproductionofenginesbutalsobytheproductionofcastlightmetalpartsplasticdecorativeitemsinsidethevehicleandsteeringaxis.Considerthequalityofsupervisorystaffanditsveryprecisemachiningauracy:tolerancebandsfor±15mmforbearingtolerance±
6.5mm.InadditiontheprocessingoftheuniversaljointsoftheIndexpaniesuseautomaticintelligentprocessingunit.Thefirsttwopartsareusedforturningcentersbeforeplayingpre-processingpost-processinglinemeasurementandthensentthroughtheconveyorbeltforhobblingcleaningandquenchingtreatment.ThelastprocessusingthesecondprocessingsystemIndex.G200TurningCenterbytwosteeringknuckleonthecarbearinghard.Inthemachinetooltopletetheonlinesurveythentothedischargeunit.Processingunitfullyintegratedintothelayoutoftheworkshopandinlinewithergonomicrequirementscoversanareaofgreatlyreducedandonlytwostaffmemberstothecustodyofmanufacturingcells.FridayCturningandG00inthemagicaleffectoftheskillstoensuredimensionalauracyCturningprocessingtechnologyhasbeenwidelyusedinmechanicalmanufacturingindustryhowefficientreasonableandpletedbythequalityoftheworkpiecebytheamountofprocessingeachengagedinthetradeofengineeringandtechnicalpersonnelmoreorlesshavetheirownexperience.IengagedinCteachingtrainingandprocessingformanyyearsaumulatedacertainamountofexperienceandskillsistoCEquipmentFactoryGuangzhouGSK980TseriesofmachinetoolproductionforexampleintroduceafewskillsinCturning.FirsttheprogramfirstsentenceskillsG00WenowhaveaesstotextbooksandCturningtechnicalbooksproceduresaresetupthefirstsentenceofworkpiececoordinatesystemthatisG50XαZβinthefirstsentenceasaprocess.AordingtothedirectiveacoordinatesystemcanbesetsothatthetoolatapointinthiscoordinatesystemascoordinatesXαZβInthispapertheoriginofworkpiececoordinatesystemaresetattherightendoftheworkpiecesurface.ProgrammingusingthismethodtheknifetheknifemustbemovedtotheestablishedpositionofG50canbesetforprocessingidentifythelocationoftheprocessisasfollows.
1.ofaknifetheroughworkpiececlampinggood;
2.SpindleistohandroundthebaserightsideknifeflatworkpiecesurfaceA;
3.Z-axisfixedthereleaseofthetoolalongtheXaxispointstoCtypeG50Z0thepointofputermemory;
4.ProgramentrymodetypeG01W-8F50turningouttobeonestepworkpiece;
5.X-axisfixedthereleaseofthetoolalongtheZ-axispointstoCstopturningoutmeasuringthediameteroftheworkpiecelevelγtheimportationofG50Xγputermemorythatpoint;
6.ProgramentrymodeentertheG00XαZβprogrammingtoolrunsthespecifiedproceduretothestartingpointandthenentertheG50XαZβproceduresfortheoriginoftheputermemory.Theabove-mentionedstepsthestepsthatthetool6atXαZβOfficelocationisessential;otherwisetheworkpiececoordinatesystemwillbemodifiednotthenormalprocessingoftheworkpiece.ProcessinghasbeentheexperienceofthepeopleallknowthattheabovepositionwillbethetooltothecumbersomeprocessofXαZβDepartmentintheeventofanaidentXorZ-axiswithoutservotrackingerrorpoweroutageshappenetc.thesystemcanrestartafterrestartsystemlossofG50workpiececoordinatevaluessetbythememoryresetbacktozerorunisnolongerworkingwillneedtore-runthetoolandresettoXαZβlocationG
50.IfitisproductionprocessingaftertheEndofareturntothestartingpointforcontinuedprocessingundertheG50isintheprocesssomeerrorsontheworkpiececoordinatesystemmaybemodified.InviewofthefirstsentenceoftheaboveproceduresusingG50workpiececoordinatesystemsetupmanydefectsIwillwanttoapproachtheworkpiececoordinatesystemfixedonthemachinewillprocessthefirstsentencechangedtoG50XαZβafterG00XαZβproblemsolved.ThecourseofitsoperationonlytofindG50usingtheabove-mentionedfive-stepprocessbeforethatis12345stepstoachieveitwillrunthetooltoasafelocationoutofprocessandcanrunautomatically.EvenifpoweroutagesandotherunforeseencircumstancesourrestartthesystemintheEditmodetomovethecursorwithoutaffectingthesafeprocessingoftheworkpieceprocessingprocessprogramsegmentaordingtoautomatetheprocessingcancontinue.FirstsentenceoftheaboveproceduretoreplaceG50withG00isthesubstanceoftheworkpiececoordinatesystemfixedonthemachinenolongerlimitedtotheoriginG50XαZβprocessconstraintswithoutchangingtheworkpiececoordinatesystemeasyoperationreliabilityandreceivedanunexpectedeffect.ChinesemetalprocessingonlineSecondcontrolofdimensionalauracyskills
1.ToamendthevalueofaknifeuptoensuredimensionalauracyFirstontheknifebecauseoferrororothercausesbeyondtheworkpieceworkpieceerrortolerancecannotmeettheprocessingrequirementscanbeaddedbymodifyingtheknifesothattheworkpiecesizetomeettherequirementtoensurethattheradialdimensionsareasfollows:a.absolutecoordinateinputmethodAordingtothebigdecreaseasmallincreaseprincipleaknifeupat001~004modified.Suchascutoffonthe2ndslotatabigsizeworkpiece
0.1mmand002showedupknivesareX
3.8mayentertheX
3.7toreducetheknifeonthe2ndmeeting.b.therelativecoordinatemethodasinthepreviouscaseenter002knifefillU-
0.1alsothesameresult.Similarlytheaxialsizeofthecontrolalsoandsoon.Suchascylindricalwithaknifeonthe1staxissomewhereaboveprocessingsizelong
0.1mmcanbepletedat001knifeenterW
0.
1.
2.Semi-finishingtoensurethattheimpactoftheeliminationofscrewgapdimensionalauracyForthemajorityofClatheusingalongertimebecauseoftheeffectsofscrewspaceandprocessingoftheworkpiecedimensionsareoftenunstablesituation.Atthistimewecanroughafterfinishingahalf-spaceto eliminatetheeffectsofscrew.1suchasaknifewithG71cylindricalroughyoucanfillinthe001knifeenterU
0.3calltheG70afinecarparkingmeasurementsandthenfillinthe001knifeenterU-
0.3onceagaincallingaG70Finish.Finishahalfafterthistimeeliminatingtheeffectsofscrewclearancetoensurethestabilityofthedimensionalauracy.
3.ToensuredimensionalauracyProgrammera.toensuredimensionalauracyabsoluteprogrammingthereisanabsoluteandrelativeprogramming.Programmingreferstotherelativecurveintheprocessingthelocationoftheendofthelinesegmenttothestartingpointforthecoordinatesofthesegmentandtodeterminetheoriginofthecoordinatesystem.InotherwordsprogrammingisrelativelyoftenattheoriginofthecoordinatestransformcontinuousdisplacementisboundtoresultinacumulativeerrortheabsoluteprogrammingareintheprocessingofthewholeprocesshavearelativelyunifiedreferencepointthatiscoordinatesoftheoriginsotheaumulatederrorovertherelativeProgrammingsmall.Cturningworkpiecetheworkpieceprecisionradialdimensionthantheaxialsizeofthegeneralhighprecisionitisinthepreparationofprocedurestheuseoftheradialsizeoftheabsolutebestprogrammingtakingintoaounttheprocessingandtheconvenienceofprogrammingoftenusedsizesofaxialrelativeprogrammingbuttheessentialaxialsizetheuseoftheabsolutebestprogramming.b.toensuredimensionalauracynumericalconversionAlotofcasesthepatternonthesizeofthebaselineandbenchmarkthesizeoftherequiredprogramminginconsistentandshouldbefirstonthebasepatternsizecoordinatesconvertedtoprogramminginsize.Figure2binadditiontosizeof
13.06mmtherestismarkeddirectlybyFigure2aandsizetobeconvertedbytheprogramsize.Oneofφ
29.95mmφ16mmandthethreedimensionsof
60.07mmrespectivelylimitthesizeoftwoaveragesizeaftertheprogramming.
4.ModifytheprogramandcontrolthesizeofpremiumknivesCMachiningweoftenencountersuchasituation:theproceduretorunautomaticallyafterstoppingmeasurementandfoundthatfailworkpiecesizesizeirregularChange.Suchasaknifewith1cylindricalworkpieceprocessingasshowninFigure3thepost-roughingandsemi-finishingparkingmeasurementsthesizeoftheradialaxisparagraphasfollows:φ
30.06mmφ
23.03mmandφ
16.02mm.InthisconnectionIusedaknifetoamendtheproceduresandmethodsmakeuptheremedyasfollows:a.modifytheprogramX30originalprogramunchangedX23changedX
23.03X16changedX
16.04Asaresultareinexcessoftheshaftabovethenameoftoleranceuniformsize
0.06mm;b.knifetofillKnifeonthe1stat001importedpremiumU-
0.
06.Aftertheseproceduresandatwo-prongedkniferevisedupandthencalltherefinedproceduresthegeneralsizeoftheworkpiececanbeeffectivelyguaranteed.CTurningCprogramisbasedonautomatedprocessingtheactualprocessingandtheoperatoronlyhasastrongabilitytousetheprograminstructionsandawealthofpracticalskillsinordertoproducehigh-qualityprocessingprocessinghigh-qualityworkpiece.SixCmachinetooltroubleshootingmethodsandtheirattentiontomattersMissionsusuallytakepartinbecauseofrepairsomerepairexperiencebinedwiththerelevanttheoriesaredescribedinthefollowinglisttoinitiate.Firsttroubleshootingmethods1initializationresetLaw:Undernormalcircumstancesbecauseofinstantaneousalarmsystemfailurecanbe hardwareresetorsystempowerswitchinordertoremovethefaultifthesystemisdownbecauseofthestorageareaplugthecircuitboardorbatterylesspressureleadtoconfusionitmustbecleartoinitializethesystemremovingtheformershouldpayattentiontomakecopiesofrecordeddataifinitializationcannotberuledoutafterthefailureremainswerecarriedoutinhardwarediagnosis.2Parameterstochangeactualprocedures:systemparametersaredeterminedbasedonsystemfunctionsparametersettingsmaycausesystemerrorsorfailuresofafunctionalnullandvoid.Sometimesbecauseofproceduralerrorscanbecausedbyuserdowntimethissystemcanbeusedtoblocksearchfunctiontocheckandcorrectallerrorsinordertoensureitsnormaloperation.3Regulationthebestmethodofadjustment:adjustmentisoneofthesimplestways.Byadjustingthepotentiometertoamendsystemfailures.Repairsuchasinafactorythesystemdisplayschaoticscenewithnormalpost-conditioning.Suchasinafactorythespindlebrakeatstart-upandskiddingwhenbeltbecauseofitslargespindleloadtorqueanddrivessettheramp-uptimeistoosmallthenormalpost-conditioning.OptimizethesystemtoadjustservodrivesystemwithmechanicaldragsystemthebestwaytomatchtheGeneralregulationtheapproachisverysimplewithamulti-linerecorderordualtracestorageoscilloscoperespectivelyobserveinstructionsandthespeedoffeedbackorresponsetotherelationshipbetweencurrentfeedback.Byadjustingtheratioofthespeedregulatorfactorsandintegrationtimetoachieveservosystemsothattherearehighdynamicresponsecharacteristicsbutnotthebestjobstatusoscillation.NOTatthesceneoftheoscilloscopeorrecordercircumstancesbasedonexperiencethatisadjustsothattheelectricalstart-upandthenslowlyadjusttothereverseuntilyoucaneliminatetheshock.4sparepartstoreplacetheLaw:Thebestdiagnosisofsparepartstoreplacebadcircuitboardandstarttodotheinitializationsothatthenormaloperationofmachinetoolsquicklyandthenrepairorreworkbadboardwhichiscurrentlythemostmonlyusedanti-approachit.5Toimprovethequalityofthepowerlaw:theuseoftheexistingpowersupplytoimprovethepowersupplyfluctuations.Forhigh-frequencyinterferencefilteringcapacitorcanbeusedbythesepreventivemeasurestoreducethepowersupplyboardfailure.6Maintenanceofinformation-tracking:somelargemanufacturingpanybasedonactualworkbecauseofdesigndefectscausedbyaidentalfailurecontinuouslymodifyandimprovethesystemsoftwareorhardware.Thesechangestotheformofconstantrepairinformationavailabletomaintenancepersonnel.Usedasthebasisfortroubleshootingcanbepletelyrighttroubleshooting.Secondtherepairshouldpayattentiontomatters1removedfromawholeblockonthecircuitboardtheRecordshouldbenotedthattherelativepositionshouldbetoconnectthecablenumberforfixedinstallationofthecircuitboarditshouldberemovedbeforeandafterthepress-fitpartsandscrewsfortherecord.Demolitionunderthepressurepartsandscrewsshouldbeplacedonadedicatedboxsoastoavoidlosstheassemblytheboxshouldbeallthingstouseorinpleteassembly.2Electricironshouldbeplacedonthefronteasilyawayfromthecircuitboardrepair.JerdoniiDressingshouldbeappropriateinordertoadapttotheweldingcircuitandtoavoidbumpswhenweldingotherponents. 3Measuringtheresistancebetweenlinesshouldbeoffthepowermeasuredresistanceshouldbemeasuredtheexchangeofredandblacktablepentwiceayeartoalargevalueforthereferencevalue.4CircuitboardhassolderbrushmostfilmsitshouldbemeasuredtofindthecorrespondingpointofthesolderjointasatestnottoeradicatethesolderfilmthereissomeinsulationboardallthebrushlayeronlyinthespotwithabladescratchDepartmentinsulatinglayer.5Shouldnotbearbitrarilycutofftheprintedcircuit.Somemaintenancepersonnelmusthaveexperienceinrepairofhouseholdappliancesusedtocheckthelinebutthenumericalcontrolequipmentonthecircuitboardsaredouble-sidedormulti-holemetalplateofplateprintinganddensefine-lineoncecutoffthehardweldingandeasytocutofftangentwhentheadjacentlineagainsomepointacutoffatonelineandshouldnotmakeitandlineoutneedtodotocutoffafewlines.6Shouldnotberemovedponents.Somemaintenancepersonneltodeterminefaultponentsintheabsenceofcircumstancesthatistheseatofyourpantsaponentbreaksdownremovedimmediatelysothatahigherrateofmiscarriageofjusticehumanelementremovedhaveahigherfailurerate.7Shouldbeusedtodemolishsuctiondevicesandsuctiondevicestinropeshouldnothavethehardwarecheck.Longtimeheatingpadshouldnotbethesameandrepeatthedemolitioninordertoavoidpaddamage.8Replacementofthedevicethepinshouldbetheappropriatetreatmentweldingshouldnotbeusedinweldingacidicoil.9Recordonthecircuitswitchthejumperpositionitshouldnotbechanged.Controlformorethantwoinspectionsorswapponentson-boardwhentheattentionoftheponentsofthetaginordertoavoidconfusionwhichcannotworkwellplate.10investigatedthepowercircuitboardconfigurationsandtypesaordingtotherequiredinspectioncanbepoweredseparatelyorallofpower.Shouldpayattentiontohigh-pressureandsomedirectaesstohigh-voltagecircuitboardorboardhashigh-voltagegeneratorinneedofappropriateinsulationshouldpayspecialattentiontotheoperation.FinallyIthink:repairshouldnotsticktoconventionsthetheoryofHealthtomovethingswemustbinethelocalactualsituationatthattimeopenthinkingstepbystepanalysisruledoutonebyoneuntilfindtherealcauseofthemalfunction.TosumupthedevelopmentofCtechnologywithmodernputertechnologyelectronictechnologydevelopmentsanddevelopmentandisbasedontheneedsofproductiondevelopment.Ctechnologynowmaturedeeperandbroaderdevelopmentwillbefaster.ThefuturesystemwillenableCmachinewithabetterandcheaper.References:
1.ZHANGYao-zong.APracticalHandbookforthepreparationofmachininggroup.MachineryIndustryPress1997 中文译文数控加工工艺一,我国数控系统的开展史
1.我国从1958年起,由一批科研院所,高等学校和少数机床厂起步进行数控系统的研制和开发由于受到当时国产电子元器件水平低,部门经济等的制约,未能取得较大的开展
2.在改革开放后,我国数控技术才逐步取得实质性的开展经过“六五”81----85年的引进国外技术,“七五”86------90年的消化吸收和“八五”91------95年国家组织的科技攻关,才使得我国的数控技术有了质的飞跃,当时通过国家攻关验收和鉴定的产品包括北京珠峰公司的中华I型,华中数控公司的华中I型和沈阳高档数控国家工程研究中心的蓝天I型,以及其他通过“国家机床质量监督测试中心”测试合格的国产数控系统如南京四开公司的产品
3.我国数控机床制造业在80年代曾有过高速开展的阶段,许多机床厂从传统产品实现向数控化产品的转型但总的来说,技术水平不高,质量不佳,所以在90年代初期面临国家经济由方案性经济向市场经济转移调整,经历了几年最困难的萧条时期,那时生产能力降到50%,库存超过4个月从1995年“九五”以后国家从扩大内需启动机床市场,加强限制进口数控设备的审批,投资重点支持关键数控系统、设备、技术攻关,对数控设备生产起到了很大的促进作用,尤其是在1999年以后,国家向国防工业及关键民用工业部门投入大量技改资金,使数控设备制造市场一派繁荣 二,数控车的工艺与工装削数控车床加工的工艺与普通车床的加工工艺类似,但由于数控车床是一次装夹,连续自动加工完成所有车削工序,因而应注意以下几个方面
1.合理选择切削用量对于高效率的金属切削加工来说,被加工材料、切削工具、切削条件是三大要素这些决定着加工时间、刀具寿命和加工质量经济有效的加工方式必然是合理的选择了切削条件 切削条件的三要素切削速度、进给量和切深直接引起刀具的损伤伴随着切削速度的提高,刀尖温度会上升,会产生机械的、化学的、热的磨损切削速度提高20%,刀具寿命会减少1/2 进给条件与刀具后面磨损关系在极小的范围内产生但进给量大,切削温度上升,后面磨损大它比切削速度对刀具的影响小切深对刀具的影响虽然没有切削速度和进给量大,但在微小切深切削时,被切削材料产生硬化层,同样会影响刀具的寿命 用户要根据被加工的材料、硬度、切削状态、材料种类、进给量、切深等选择使用的切削速度 最适合的加工条件的选定是在这些因素的根底上选定的有规那么的、稳定的磨损到达寿命才是理想的条件 然而,在实际作业中,刀具寿命的选择与刀具磨损、被加工尺寸变化、外表质量、切削噪声、加工热量等有关在确定加工条件时,需要根据实际情况进行研究对于不锈钢和耐热合金等难加工材料来说,可以采用冷却剂或选用刚性好的刀刃
2.合理选择刀具1粗车时,要选强度高、耐用度好的刀具,以便满足粗车时大背吃刀量、大进给量的要求 2精车时,要选精度高、耐用度好的刀具,以保证加工精度的要求 3为减少换刀时间和方便对刀,应尽量采用机夹刀和机夹刀片
3.合理选择夹具1尽量选用通用夹具装夹工件,防止采用专用夹具;2零件定位基准重合,以减少定位误差
4.确定加工路线加工路线是指数控机床加工过程中,刀具相对零件的运动轨迹和方向 1应能保证加工精度和外表粗糙要求; 2应尽量缩短加工路线,减少刀具空行程时间
5.加工路线与加工余量的联系目前,在数控车床还未到达普及使用的条件下,一般应把毛坯上过多的余量,特别是含有锻、铸硬皮层的余量安排在普通车床上加工如必须用数控车床加工时,那么需注意程序的灵活安排
6.夹具安装要点目前液压卡盘和液压夹紧油缸的连接是靠拉杆实现的,如图1液压卡盘夹紧要点如下首先用搬手卸下液压油缸上的螺帽,卸下拉管,并从主轴后端抽出,再用搬手卸下卡盘固定螺钉,即可卸下卡盘 三,进行有效合理的车削加工有效节省加工时间Index公司的G200车削中心集成化加工单元具有模块化、大功率双主轴、四轴联动的功能,从而使加工时间进一步缩短与其他借助于工作轴进行装夹的概念相反,该产品运用集...模板内容仅供参考 。