【正文】 于系統(tǒng)、 子系統(tǒng)及部件 9 Customer of DFMEA 顧客的定義 Customer for a Design FMEA顧客的定義 ? End user 通常是指“最終使用者” ? Manufacturing/Processresponsible engineer 也可以是更高一層設計司，制造或裝配生產(chǎn)工程司 10 Team Effort 小組的努力 ? Design 設計 ? Manufacturing 制造 ? Quality 品質(zhì) ? Material 材料 ? Reliability 可靠性 ? Subcontractor 分供方 11 DFMEA 設計失效模式及效應分析 Design FMEA is LIVING document and should 設計 FMEA是一份動態(tài)的文件 ? be initiated before or at design concept finalization 在一個設計概念最終形成之時或之前開始 ? be continually updated 在產(chǎn)品開發(fā)的各個階段 , 發(fā)生更改或獲得更多的信息時 , 持續(xù)予以更新 ? be fundamentally pleted before production drawing release 在產(chǎn)品加工圖樣完工之前全部完成 12 DFMEA 設計失效模式及效應分析 ? Assumption: Design will be manufactured/assembled 假設 : 該設計將按此意圖進行生產(chǎn) ? 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 overe design weakness DFMEA不依靠過程控制來克服潛在的設計缺憾 ? DFMEA considers technical limits of manufacturing DFMEA考慮制造的限制 – Mold drafts 拔模斜度 – Assembling space 裝配空間 – Tolerances / capability 公差 / 過程能力 13 Development of a Design FMEA 設計 FMEA的開始 First Step of DFMEA: IDENTIFY DESIGN INTEND 第一步 : 確定設計意圖 “ Listing of what design is expected to do and what is expected not to do” “列出設計期望做什么和不期望做什么 ? 14 Development of a Design FMEA 設計 FMEA的開始 Source of information 資料來源 ? QFD 質(zhì)量功能展開 ? Product Requirement 產(chǎn)品要求 ? Manufacturing requirement 生產(chǎn)要求 “Design Intent” “設計意圖” 15 Block Diagram 框圖 DFMEA Remended tool : Block Diagram DFMEA建議工具 : 框圖 To understand 明白 Housing 燈罩 ?input to the block 輸入 Slip fit ?function of the block 功能 Batteries 電池 plate 彈簧 Compressive fit壓緊裝接 ?output form the block 輸出 Snap fit 卡扣連接 滑動配合 16 Page__________o f___________ ________Component_________________________ Design Responsibility_________________________ Prepared by________________________ Mode Year(s)/Vehicle(s)____________________ Key Date _____________________________ FMEA Date (Orig.) ______(Rev.)_________ Item Function Potential Failure Mode Potential Effect(S) of Failure Sev Class Potential Cause(s) Mechanism(s) of Failure Occur Current Design Controls Prevention Current Design Controls Detection Detec RP.N. Remended Action(S) Responsibility Target Completion Date Action Results Actions Taken S e V Occ Det R. P. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 18 19 20 21 22 ________ System ________ Subsystem POTENTIAL FAILURE MODE AND EFFECTS ANALYSIS (Design FMEA) FMEA Number_______________ Core Team__________________________________________________________________________________________________________________________ 17 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 )_________ 項目 潛在失效模式 潛在失效的后果 嚴重度數(shù)(S) 級別 潛在失效的起因 / 機理 頻度數(shù) 現(xiàn)行設計控制 預防措施 現(xiàn)行設計控制 探測措施 探測度數(shù)(D) 風險順序數(shù)RPN 建議措施 責任和目標完成日期 措施結(jié)果 采取的措施 嚴重度數(shù) 頻度數(shù) 探測度數(shù) R. P. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 16 17 18 19 20 21 22 ________ 系統(tǒng) ________ 子系統(tǒng) POTENTIAL FAILURE MODE AND EFFECTS ANALYSIS (Design FMEA) 潛在失效模式及后果分析 (設計 FMEA) FMEA 編號 _______________ 核心小組 __________________________________________________________________________________________________________________________ 功能 18 Details of DFMEA DFMEA的詳細內(nèi)容 1) FMEA Number FMEA編號 2) System, Subsystem, or Component Name and Number 系統(tǒng)、子系統(tǒng)或零部件的名稱及編號 Enter the FMEA document number, which may be used for tacking. 填入 FMEA文件編號 , 以便查詢 。 19 Design Objectives: 1. Minimum 3000 hours of riding without need for maintenance and 10,000 hours of riding for design life. 2. Acmodates male adults fortably to the percentile 3. …ect… 4. Function: – Ease of use Potential Failure Mode(s): ? Difficult to steer ? Difficult to pedal Function: – Provide reliable transportation Potential Failure Mode(s) : ? Chain breaks frequently ? Tires require frequent maintenance Function : – Provide fortable transportation Potential Failure Mode(s) ? Seating position is not fortable Function: –Provides stable