设计失效模式及效应分析DFMEA_精品文档PPT格式课件下载.ppt

1、Design will be manufactured/assembled 假设假设假设假设 :该设计将按此意图进行生产该设计将按此意图进行生产该设计将按此意图进行生产该设计将按此意图进行生产Potential failure modes during production“Need Not”but“May Be”included制造的失效模式“不需”但“也可能”包括DFMEA not rely on process controls to overcome design weaknessDFMEA不依靠过程控制来克服潜在的设计缺憾DFMEA considers technical limit

2、s of manufacturingDFMEA考虑制造的限制Mold drafts 拔模斜度 Assembling space 装配空间Tolerances /capability 公差/过程能力6Development of a Design FMEA 设计设计FMEA的开始的开始 First Step of DFMEA:IDENTIFY DESIGN INTEND第一步:确定设计意图“Listing of what design is expected to do andwhat is expected not to do”“列出设计期望做什么和不期望做什么?7Development of

3、 a Design FMEA设计设计FMEA的开始的开始Source of information 资料来源QFD 质量功能展开Product Requirement 产品要求Manufacturing requirement 生产要求 “Design Intent”“设计意图”8Block Diagram 框图框图DFMEA Recommended tool:Block DiagramDFMEA建议工具:框图To understand 明白Housing灯罩input to the block 输入Slip fitfunction of the block 功能Batteries电池plat

4、e弹簧Compressive fit压紧装接output form the block 输出Snap fit 卡扣连接滑动配合9Page_o f_Component_Design Responsibility_Prepared by_Mode Year（s）/Vehicle（s）_Key Date _FMEA Date（Orig.）_（Rev.）_ItemFunction Potential Failure ModePotential Effect（S）of Failure SevClassPotential Cause（s）Mechanism（s）of FailureOccurCurrent

5、Design ControlsPreventionCurrentDesign ControlsDetectionDetecRP.N.Recommen-ded Action（S）Responsibility&Target Completion DateAction ResultsActions TakenSeVOccDetR.P.N.1234567891011121314151616171819202122_ System_ SubsystemPOTENTIAL FAILURE MODE AND EFFECTS ANALYSIS（Design FMEA）FMEA Number_ Core Tea

6、m_10共_頁,第_頁_部件 _設計責任_編制人_車型年/車輛類型_關鍵日期 _FMEA 日期（編制）_（修訂）_项目 潜在失效模式潜在失效的后果严重度数（S）级别潜在失效的起因/机理频度数现行设计控制预防措施现行设计控制探测措施探测度数（D）风险顺序数RPN建议措施责任和目标完成日期措施结果采取的措施严重度数频度数探测度数R.P.N.1234567891011121314151616171819202122_ 系统_ 子系统POTENTIAL FAILURE MODE AND EFFECTS ANALYSIS（Design FMEA）潜在失效模式及后果分析潜在失效模式及后果分析（设计设计FM

7、EA）FMEA 编号_核心小组_ 功能11Details of DFMEADFMEA的詳細內容的詳細內容1）FMEA Number FMEA编号 2）System,Subsystem,or Component Name and Number 系统、子系统或零部件的名称及编号Enter the FMEA document number,which may be used for tacking.填入FMEA文件编号,以便查询。Indicate the appropriate level of analysis and enter the name and number of the system

8、,subsystem,or component being analyzed.注明適當的分析級別並填入被分析的系統、子系統或部件的名稱及編號。12Design Objectives:1.Minimum 3000 hours of riding without need for maintenance and 10,000 hours of riding for design life.2.Accommodates maleadults comfortably to the 99.5th percentile3.ect4.Function:Ease of usePotential Failure

9、 Mode（s）:Difficult to steerDifficult to pedalFunction:Provide reliable transportationPotential Failure Mode（s）:Chain breaks frequentlyTires require frequent maintenanceFunction:Provide comfortable transportationPotential Failure Mode（s）Seating position is not comfortableFunction:Provides stable atta

10、chment for seat supportPotential Failure Mode（s）Structural failure seat support Excessive deflection of seat supportFunction:Provides pleasing appearancePotential Failure Modes（s）Finish（shine）deterioratesPaint chipsHandle Bar AssemblyRear Wheel Assemble Sprocket AssembleFunction:Provides structural

11、supportPotential Failure Mode（s）:Structural failureExcessive deflectionFunction:Provides dimensional control for correct finished frame geometry Potential Failure Mode（s）:Length of frame mounting points to longLength frame mounting points too shortFunction:Support frame assembly production methods（w

12、elding）Potential Failure Mode（s）:Bicycle FrameFront Wheel Assemble Seat AssembleChain AssembleUpper FrameLower front Tube Lower Rear TubeSprocket TubeSystem LevelSubsystem LevelComponent Level13设计目标:1.骑行至少3000小时无需保养,2.设计寿命为骑行10000小时。2.适于第99.5百分位成年男子3.骑用,舒适便利。4.3.等等.1.功能功能:便于使用潜在失效模式潜在失效模式:方向把不好用脚踏板不

13、好用功能功能:提供可靠的交通运输潜在失效模式潜在失效模式:链条经常断开需要经常修理车胎功能功能:提供舒适的交通运输潜在失效模式潜在失效模式:车座位置不舒服功能功能:为座位支撑提供稳定的附属物潜在失效模式潜在失效模式:座位支撑的结构性失效座位支撑的过大变形功能功能:提供好看的外观潜在失效模式潜在失效模式:外观（光亮度）变坏漆皮开裂把手总成后轮总成链轮总成功能功能:提供结构性支撑潜在失效模式潜在失效模式:结构性失效过大变形功能功能:对正确的车架几何外形提供尺寸控制潜在失效模式潜在失效模式:车架安装点的长度过长车架安装点的长度过短功能功能:为车架总成的生产方法（焊接）提供支持潜在失效模式潜在失效模式:自行车车架前轮总成车座总成链条总成上部车架下前车管下后车管链轮管系统