英文教材-失效模式及其影响分析(编辑修改稿)

英文教材-失效模式及其影响分析(编辑修改稿)内容摘要：

e2 C ut LD G U , M ou nt LD G U t o l i ne pe n ho us i ng = A s s e m bl e LD G U3 M ou nt a nd s e c ur e f l e x a s s y = A s s e m bl e Fl e x A s s yFailure Mode and Effect Analysis Chart H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 25 Step 2 Analysis of the Process Examination of: • How the purpose of the process/operation are realised by the designers/engineers. • What are the working conditions * static * dynamic H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 26 Step3 Establish purpose of each operation and the possible failure modes • What is the purpose of the process step ? • Which deviations are possible ? ( FAILURE MODE ) • What is the effect of that deviation on the producibility? ( EFFECT ) • What is the cause of that deviation ? ( CAUSE ) H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 27 MATERIAL MAN MACHINE METHOD MEASUREMENT ENVIRONMENT PROCESS Product Functions Product Functions Product Functions Process Cause Effect Investigation POTENTIAL CAUSE EFFECT POTENTIAL FAILURE POTENTIAL H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 28 Potential Failure Modes * Failure means any one or more of the following … failure to perform/deliver function failure to meet design intent failure to meet customer expectations something undesirable, . a noisy projector application problem, . wrong application * failure could occur, but will not necessarily occur * describe in “physical” or technical terms, not as a symptom recognisable by the customer * use brainstorming to ensure pleteness Examples : • corroded • cracked • deformed • oxidised • leaking • fractured • malformed • flattened • nonsticking • contaminated H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 29 S u b j e c t : No P r oc e s s s t e p / P ur po s e P ot e nt i a l Fa i l ur e M od eP ot e nt i a l E f f e c t on Fa i l ur eS P ot e nt i a l c a us e s on Fa i l ur eO C ur r e nt C on t r olD R P N1 M o u n t a c t u a t o r a n d i n s t a l l s p r i n g c l i p = H o l d a c t u a t o r i n p l a c eD i f f i c ul t y i n a s s e m bl i ng s pr i ng c l i p2 C u t L D G U , M o u n t L D G U t o l i n e p e n h o u s i n g = A s s e m b l e L D G ULe ns a nd g r a t i ng c on t a m i na t i on3 M o u n t a n d s e c u r e f l e x a s s y = A s s e m b l e F l e x A s s yESDFailure Mode and Effect Analysis Chart H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 30 Effects ( Process FMEA ) Each failure mode may have undesirable side effects on some or all the following: 1. Enduser (product) 2. Downstream process (next operation) 3. Local process All 3 effects should be considered in any process FMEA H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 31 Severity (ProcessFMEA) Rating Degree Effects on Effect on down End User Stream/Local process 1 Minor * not noticeable * no effect 2 low * slightly noticeable * no impact/limited effect 3 * limited impact on both 4 Moderate * cust dissatisfaction * may require minor rework 5 * reduced performance * may req. unscheduled rework 6 * perform. Deterioration * may cause damage to equip. 7 High * high deg. of cust dissatisfaction * may cause serious disruption 8 * loss of subsystem function, * may require major rework may endanger machine /operator 9 Very high * safetyrelated * production line shut down 10 * nonpliance with * saftety of prod personnel threatened government regulations ~ Severity is the assessment of the seriousness of the effect H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 32 S u b j e c t : No P r oc e s s s t e p / P ur po s e P ot e nt i a l Fa i l ur e M od eP ot e nt i a l E f f e c t on Fa i l ur eS P ot e nt i a l c a us e s on Fa i l ur eO C ur r e nt C on t r olD R P N1 M o u n t a c t u a t o r a n d i n s t a l l s p r i n g c l i p = H o l d a c t u a t o r i n p l a c eD i f f i c u l t y i n a s s e m b l i n g s p r i n g c l i p~ Lo ng c y c l e t i m e c a pa c i t y l os s82 C u t L D G U , M o u n t L D G U t o l i n e p e n h o u s i n g = A s s e m b l e L D G UL e n s a n d g r a t i n g c o n t a m i n a t i o n~ Fa i l G r a t i ng A dj us t m e nt83 M o u n t a n d s e c u r e f l e x a s s y = A s s e m b l e F l e x A s s yE S D LD G U da m a g e by c on t a c t a f f e c t i ng l on g / s ho r t t e r m r e l i a bi l i t y8Failure Mode and Effect Analysis Chart H Philips CFT Asia Pacific Innovation amp。 Industrial Support CZB698000006| 2020年 7月 7日星期二 | 33 Potential Cause(s) of Failure * How the failure mode could occur, described in terms of something correctable or controllable * list, using brainstorming or Fault Tree Analysis (FTA), every conceivable failure cause assignable to each failure mode * causes should be specific, . “operator error” or “machine problem” are examples of causes which are not specific enough * causes may or may not be mutually exclusive if。