DFMEA---失效模式与后果分析

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DFMEA------失效模式与后果分析(DesignFailureMode&EffectAnalysis)Marian(Shenzhen)Co.,Ltd编制:曹喜元FormationBy:JackCao日期:Date:1-Feb-2013主要内容Maincontent1.DFMEA介绍4.DFMEA关键参数DFMEAPresentationDFMEAKeyParameter2.DFMEA职责5.DFMEA表单填写说明DFMEAResponsibilityDFMEAFormFillingExplanation3.DFMEA制作流程6.DFMEA案例DFMEAMakeProcessDFMEAExample一、DFMEA的介绍DFMEAPresentationDFMEA是FMEA中的一种,FMEA分为:DFMEA和PFMEADFMEAisintheFMEAonetype,FMEAContain:DFMEA&PFMEADFMEA是由负责设计的工程师或小组,在产品设计阶段尽可能的范围内预估产品在设计上可能发生的缺点.DFMEAisEngineerorgrouptoresponsiblescheme,Asfaraspossiblewithinthescopeoftheestimatedproductdesignonthepossiblefaultsintheproductdesignstage.PFMEA是由负责制造装配的工程师或小组,预估产品在生产过程阶段或之前可能会发生的缺点.PFMEAisPEorgrouptoresponsiblescheme,Asfaraspossibletheestimatedproductpossiblefaultsintheproductiveprocessorbefore.本章节重点讲述DFMEAThischapterfocusesonDFMEA.DFMEA的形成DFMEAFormationDFMEA是由负责设计的工程师或小组,在尽可能的范围内预估产品在设计上可能发生的缺点,衡量该项缺点或可能造成的影响,并拟定为防止或检测该缺点应改善的设计控制,并推动其标准化作业,且必须配合设计发展之程序反复执行.DFMEAisEngineerorgrouptoresponsiblescheme,Asfaraspossiblewithinthescopeoftheestimatedproductdesignonthepossiblefaultsintheproductdesignstage,Measurethefaultsorcancauseinfluence,andplantopreventortestingthedefectshouldbeimproveddesigncontrol,andpromotethestandardizedoperation,andmustfitinwiththedevelopmentofdesignprogramandimplementation.最终成品及其所有相关的系统、子系统都应纳入评估.DFMEA是设计小组,即公司工程,运用设计,工程经验或分析方法等而形成的.Thefinalandallrelatedsystem,subsystemshouldbeincludedinassessment.DFMEAisthedesignteam,namelythecompanyproject,theuseofdesign,engineeringexperienceoranalysismethodsandform.DFMEA必备条件DFMEAEssentialCondition确认已知及潜在的失效模式;Confirmtheknownandthepotentialfailuremode.确认每一个失效模式的效应和原因;Confirmeachfailuremodeeffectandreasons.风险优先评估(严重性、发生频率、难检度);Riskpriorityevaluation(severity,occurrencefrequencyanddifficulttocheckdegree)提供问题的数据及改善行动;Provideproblemofdataandimprovementaction.DFMEA的动态链DFMEATrendsCatenationDFMEA是个循环过程,在设计方案最终形成之时或之前开始.DFMEAisacyclicprocess,thedesignschemeoffinalformorbeforethestart.在产品开发各阶段中,当设计有变化或得到其他信息时,应及时,不断地修改,最终在产品加工图样完成之前全部结束。Ineverystageofproductdevelopment,whenthedesignchangeorgetotherinformation,shouldbeprompt,constantlymodified,finally,inproductprocessingpatternuntilallover.二、DFEMA职责DFMEAResponsibility工程经理:DFMEA总体负责人,负责组建DFMEA团体,提出DFMEA实施计划,并组织召开DFMEA会议,分配团队人员任务组织DFMEA评审,DFMEA审核.Projectmanager:generalmanager,responsibleforDFMEA,thispaperputsforwardaDFMEAgroupDFMEAimplementationplan,andorganizeaDFMEAmeeting,distributionteampersonneltaskOrganizationDFMEAreview,DFMEAaudit.工程师:负责主导DFMEA文件编写、修改和升级.Engineer:responsibleforleadingDFMEAdocumentpreparation,modificationandupgrade.二、DFEMA职责DFMEAResponsibility工程助理:负责客户投诉问题,研发、试产、量产中问题的收集,及时反馈到DFMEA团体负责人处,并参与O,S,D参数评估,提供量产CPK数据.Projectassistant:responsibleforcustomercomplaintproblem,researchandtrialproduction,thequantityofcollection,andrenderWhenthefeedbacktoDFMEAgroupplace,andparticipateinO,S,Dparameterevaluation,SupplyvolumeproductionCPKdata.试样工程师:负责研发产品测试过程中所出现问题点的收集并及时反馈到DFMEA负责人处,参与O,S,D参数评估.Sampleengineer:responsibleforresearchanddevelopmentintheprocessofproducttestingproblemspointcollectionandtimelyfeedbacktotheDFMEAchiefplace,participateinO,S,Dparameterevaluation.二、DFEMA职责DFMEAResponsibilityCQE:负责客户需求信息归纳整理,DFMEA建议措施监督实施、追踪,实施效果反馈,根据DFMEA和客户需求等信息制定控制计划,并参与O,S,D参数评估.CQE:Beresponsibleforthecustomerdemandinformationsummary,DFMEAsuggestedmeasuressupervisionandimplementation,trackingandeffectfeedback,accordingtotheDFMEAandrequirementsforinformationsuchascontrolplan,andparticipateinO,S,Dparameterevaluation.三、DFMEA制作流程DFMEAMakeprocess注:团队制定目标,使团队清楚新产品或以改善为目标,并需要了解客户需求。Note:Theteamsetgoals,maketheteamclearnewproductsortoimproveasthegoal,andneedtounderstandcustomerneeds.使用方法;Methodofapplication.客户要求的设计/工程SPEC;Customerrequestedproject&EngineeringSPEC.产品信赖;ProductTrust.制程、生产、装配要求;Process,ProductionAssembleofRequirement.品质目标.QualityDestination.组成DFMEA团队ConstituteDFMEATeam确定目标ConfirmDestination三、DFMEA制作流程DFMEAMakeprocess产品设计及类似产品设计的问题及原因;Productdesignandsimilarproductdesignproblemsandreasons制造工艺及类似产品制程中常及的不良原因;Manufacturingprocessandsimilarproductsinprocessandbadreason.类似产品的制程能力及原因;Similarproductsofprocesscapabilityandthereason.类似产品的客诉及原因;Similarproductsofcustomercomplaintandthereason.类似产品的依赖性失效及原因;Similarproductsthedependenceofthefailureandthereason.类似产品的管理性问题;Similarproductsofmanagerialproblems.资料收集DataCollection三、DFMEA制作流程DFMEAMakeprocess使用维修;UseMaintain.环境.Environment.表格格式TableFormat.分层层次DelaminationAdministrativelevels.失效定义FailureDefinition.成果整合AchievementIntegration.时机Opportunity.资料收集DataCollection制订执行方案FormulateimplementPlan三、DFMEA制作流程DFMEAMakeprocess分析制程特性AnalysisProcessCharacter定义制造流程DefinitionproductionProcess分析产品特性AnalysisProductCharacter分析失效原因AnalysisFailureCause分析现行控制方法AnalysisControlMethod分析失效效应AnalysisFailureEffect分析发生率AnalysisOccurrenceRate分析难检度AnalysisDetection分析严重度AnalysisSeverity计算风险优先数CalculatedRiskPriorityNumber分析制程特性AnalysisProcessCharacter三、DFMEA制作流程DFMEAMakeprocess决定优先改善的失效模式DecideAmeliorativeFailureMode建议改善措施RecommendationImprovementMeasures改善实施ImprovementImplement结果确认有效ResultNotarizeEffective四、DFMEA关键参数DFMEAKeyParameter严重度、发生率、难检度、风险优生数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