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简介：AccordingtothestatisticalanalysisoftheChinaAssociationofAutomobileManufacturers,becauseoftheimpactoftheSpringFestivalholiday,productionandsalesoftheautomobilesshowedarelativelyfastmonth-on-monthdecline,andthedeclineofpassengercarswasmoreobviousinFebruary2019.

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简介：AccordingtothestatisticalanalysisofChinaAssociationofAutomobileManufacturers,automobileproductionandsalesshowedasmallmonth-on-monthincreaseinNovember2018,buttheyear-on-yeardeclinewasstillobvious.DuringtheJanuary-Novemberperiod,automobileproductionandsalescontinuedtodeclineyear-on-year,andthedeclinewaslargerthanthatoftheJanuary-Octoberperiod.

简介：Lightweightdesignisoneofthedevelopmenttrendsoftheautomobileindustry.AneffectivewaytoachievelightweightautobodiesistouseAHSS(advancedhighstrengthsteel)forthesafetycomponentsofautomobiles.ThisstudyhastakendoorsillreinforcementsmadeofmartensiteAHSSastheobject,andperformedresearchontheAHSSrollformingtechnologiesandprototypedevelopmentoftypicalasymmetricopencomponents.Bymeansoffiniteelementanalysis(FEA)andsimulation,studieshavebeencarriedoutonthespringbackandedgewavedefectsduringAHSSrollforming,andanoptimizedprocessdesignhasbeenachieved.Thegenerationmechanismsofverticalbows,horizontalcambers,twists,pre-punchedholedistortionandcutendflarehavebeenanalyzed,andsolutionstothesedefectshavebeengiven.Inaddition,tesingoftherollformingprocessforAHSShasbeenconductedandtypicalsampleswithrequireddimensionalaccuracyhavebeenmanufactured.Thisstudyhasprovidedtechnicalsupportforthelarge-scaleapplicationofAHSS.

简介：Weadheretotheunchangedpur-suitinthechangingmarket,thatis'TopQualityandTopSer-vice'.Itisthehighesttargetofimprovingtheclients'value,creatingabrightfuturebyhighquality,hence,tocreateafirstclassenterpriseandfirstclassbrand.Stepbystep,wehaverealizedthedreamsonebyone.Wearelookingforwardtoagreatersuccess!

简介：Tubehydroformingtechnologyhasshowntheattentionoftheautomotiveindustryduetoitsadvantagesoverconventionalstampingandweldingmethods.Inthisstudy,thetubehydroformingprocessincludingtubebending,preformingandhydroformingprocessforanautomobilesubframeisanalyzedanddesignedbythesimulationsoftwareAutoFormofafiniteelementmethod(FEM)program.Aparametricstudyiscarriedouttoobtaintheeffectoftheformingparameterssuchasinitialtubesizeandloadingpathonthe...

简介：AnFEanalysisprocedurewaspresentedtopredictthebehaviorofsoilogeogridinterctionunderautomobileloading.Thedynamicinteractionsbetweenthetransversebars,thelongitudinalribsandthesoilweresimulatedbyasystemconsistingofnonlinearsprings,dashpotsandmasses,tostudythedeformationpropertiesofthereinforcedsoil.Theequivalentstiffnessanddampingratioscouldbedeterminedwiththeshakingtable.Thedynamicresponsesofareinforcedsubgradewereanalyzedwiththe3Dfiniteelementapproach.Thisapproachisprogrammedandappliedtoanalyzethesoilogeogridinteractionunderdynamicloading.Thecomparativeanalysisoftheresponseofthereinforcedsubgradeandthatofthesubgradewithoutreinforcementshowsthatthegeogridplacedatthebottomofthebaselayermayeffectivelyreducetheaccumulativeplasticdeformationduetothecyclicautomobileloading.

简介：ShaanxiAutomobileGroupCo.,Ltd.aimstorealizesustainabledevelopmentandactivelydevelopjointventureandcooperationwithforeigncompanies.Byadoptingsocialcapitalsinabroadway,bothitsscaleandproductioncapabilityhaveincreasedrapidlyandreachedanannualproductoutputof30,000heavy-dutyautomobiles,20,000mediumlorries,1,500buses(includingitschassis)and50,000heavy-dutytruckaxles.Inaddition,theannualproductionofitsradiator,oiltankandotherautopartsachieveRMB500millionproductionvalue.

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简介：ShougangGrouphascarriedoutastrategicstructureadjustmentinordertorealizethepromiseofChinesepeopletotheOlympicGames.Automotivesheetsarechosenasatypeofstrategicproductandanenginetoupgradeenterprisemanagement,technologyandoperationtoreachthetopinternationallevelduringthetransitionfromlongproductstosteelsheetsinShougangGroup.Since2006,ShougangGrouphasmadeanelaboratepreparationonsteelsheetculture,productionlineconstruction,technologyimport,pilotplantandtalentreserve.Itlaysthefoundationforthedevelopmentofautomotivesheets.Thedevelopinghistoryofcoldrolledautomotivesheetsisreviewedandtheresearchanddevelopmentofcoldrolledautomotivesheets,tacklingkeyproblemofdefectonsurfaceandthelatestprogressofautomotivesheetsconstructionaredescribedinthispaper.Themaincontentsweregivenasfollows:①TheproductsofautomotivesheetsrealizezerobreakthroughinShougangGroup.Monthlyoutputwas300toninJanuary,2009anditincreasedto48000toninJune,2010.TheratioofIFsteelsheetsincreasesto70%from40%.Theproportionofoutsidepanelinautomotivesheetsoccupysmorethan15%.②Ahighemulationalpilotplantisusedasaproductdevelopingplatformtodevelopsuccessfullyautomotivesheetswith1000MPaandbelow.ItguaranteesthattheindustrialdevelopmentofDPandTRIPsheetsgetssuccessatatime.Itcoverscontinuousannealingsheetswithtensilestrength≤780MPaandgalvanizingsheetswithtensilestrength≤590MPa.③Individualdesignisusedtomeetspecialrequirementofcustomer.Shougangowns23innerbrandsofLCAKandIFsteels.Itinsuresthatthegradesofyieldstrengthcoverwholerangefrom120to270MPa.Itkeepsthestabilizationofsteelperformancebymeansofchemicalcompositioncontrolandhighaccuracyrollingtechnology.Forexample,thestrengthofsoftsteelfluctuateswithin±15MPa.④ThesteelsheetswithsurfacegradeO5areproducedsteadilybysolvingformingstr

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简介：Inthispaper,wepresentarobotvisionbasedsystemforcoordinatemeasurementoffeaturepointsonlargescaleautomobileparts.Oursystemconsistsofanindustrial6-DOFrobotmountedwithaCCDcameraandaPC.Thesystemcontrolstherobotintotheareaoffeaturepoints.Theimagesofmeasuringfeaturepointsareacquiredbythecameramountedontherobot.3Dpositionsofthefeaturepointsareobtainedfromamodelbasedposeestimationthatappliestotheimages.Themeasuredpositionsofallfeaturepointsarethentransformedtothereferencecoordinateoffeaturepointswhosepositionsareobtainedfromthecoordinatemeasuringmachine(CMM).Finally,thepoint-to-pointdistancesbetweenthemeasuredfeaturepointsandthereferencefeaturepointsarecalculatedandreported.Theresultsshowthattherootmeansquareerror(RMSE)ofmeasurevaluesobtainedbyoursystemislessthan0.5mm.Oursystemisadequateforautomobileassemblyandcanperformfasterthanconventionalmethods.

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简介：VBHF(可变空白的持有者力量)优化策略被采用决定最佳的时间变量和空间变量的BHF轨道，瞄准与铝合金表改进汽车面板的formability。策略基于适应模拟被实现模拟周围在单人赛为Numisheet'05甲板盖的每个分割的文件夹计算批评起皱BHF。在最佳的VBHF和经常的BHF下面的印上的部分的厚度比较证明分别地，四节的变化被70%，44%，64%和61%减少它在厚度分发和变化控制显示重要改进。通过种类路径比较的调查揭示formability改进的基本原因。学习与铝合金表证明新VBHF优化策略的适用性到复杂部分。

简介：TheprecisionforgingprocessissimulatedbycommercialsoftwareDeform3Dusingarigidvisco-plasticmodeltopredictthestatusofmetalflowandthedistributionofequivalentplasticstrain,providingguidanceformakingdecisionontheoptimalchoiceofprocessparametersandmouldstructure.TrialforgingwasusedtoverifytheeffectivenessofFEMsimulationresults.

简介：ThepapershowsthemainsurfacedefectsofcoldrollingautomobilesheetinBXSteel.Themainsurfacedefectsareunusualdefects.Thetypicalfamiliardefectsaresliverandpunctuatesthatareontherollingdirection.Theinclusionsofsteel-makingandscalesofhotrollingprocessarethemaincausesofdefects.Theyarethebiggestproblemspuzzlecoldrolledautomobilesheetsurfacequality,andaretheburningissuesofBXSteel.Weclassifyandanalysisthedefects.Weobservethepanoramaofsurfacedefectsusingportablevideomicroscopyapparatus,andcleanthesampleusingultrasonicshaker,analysisthedefectspatternandchemicalcompositionusingscanningelectronmicroscope.Atpresenttheprimarydefectsthatimpactedcoldrolledautomobilesheetqualityaredarksliverdefects.Wecontrolthesteel-makingandhotrollingprocessaimingatthecauseandpositionofdefectsmaking.Wefinecontroltheoperatingofsteelladle,gating,castingsystemandcontinuouscastingmachineinsteelmakingprocess.Thescaledefectisreducedbycontrollingfurnace,highpressurewaterdescalingsystemandfinishmilldescalinginhotrollingprocess.Alonewiththereformingandrenewingofequipment,gatheringproducingexperience,thecoldrolledautomobilesheetqualitymadeinBXSteelisupgradinggradually.