发布时间 : 星期三 文章RX-QP-04PFMEA控制程序PFMEA Procedure更新完毕开始阅读7ada8d70abea998fcc22bcd126fff705cc175c09
PFMEA控制程序 文件编号Document ID.: 版次Version: A/0 RX-QP-04 修改日期Revision Date: 页次Page: 12 /22 B) When determining the potential mode, the design engineer can take the review of the former TGW (things gone wrong) research, doubt, report and group brainstorming result as the starting point; meanwhile, he shall consider the potential failure mode occurring under specific operation environment conditions (e.g.: hot, cold, dry and dust, etc.) and service conditions (e.g.: exceeding average mileage, rough road and driving in city only, etc.).
C)典型的失效模式可以是但不限于下列情况：裂纹、变形、松动、泄漏、断裂、支撑不足等。 潜在的失效模式应以规范化或技术术语来描述，不必与顾客察觉的现象相同。
C) Typical failure mode can be but not limited to the following cases: flaw, deformation, looseness, leakage, breakage and underbracing, etc. The potential failure mode shall be described by using standardized or technical terms, not necessary to be the same as the phenomenon perceived by the customer. 5.8.11潜在失效的后果
5.8.11 Effects of potential failure
指为顾客感受到的失效模式对功能的影响。填入失效模式对系统功能的影响，就如顾客感受的 一样，应根据顾客可能发现或经历的情况来描述失效的后果(应记住顾客可能是内部的顾客，也可能是外部最终的顾客)。如果失效模式可能影响到安全性或对法规的符合性，要清楚地予以说明。
It refers to the impact imposed by the failure mode on function and perceived by the customer. Fill in the impact imposed by the failure mode on function, just the same as the feeling of the customer, so the failure effects shall be described according to condition that the customer may find or experience (it shall be remembered that the customers may be internal and also external final ones). If the failure mode may influence safety or conformity of laws and regulations, it shall be stated clearly.
A)失效的后果必须按照所分析的具体的系统、子系统或零部件来说明；应记住不同级别零件、子系统和系统之间还存在着系统层次上的关系(比如：一个零件可能会断裂，这样会引起总成的振动，从而导致一个系统间歇性的运行。系统的间歇性运行可能会造成性能的下降，最终导致顾客的不满，因此需要小组/集体的智慧尽可能预测到失效的后果)。
A) The failure effects shall be explained according to the specific system, subsystem or parts
PFMEA控制程序 文件编号Document ID.: 版次Version: A/0 RX-QP-04 修改日期Revision Date: 页次Page: 13 /22 and components analyzed; it shall be remembered that relations on the system level exist among parts and components, subsystems and systems at different level (e.g.: a component may break, which may cause vibration of the assembly and cause intermittent running of a system consequently. Intermittent running of the system may cause reduction of the performance and leads to dissatisfaction of the customer finally, so group/collective wisdom is needed to forecast the failure effects).
B)典型的失效后果可能是但不限于下列情况：噪声、工作不正常、外观不良、不稳定、间歇性
工
作、粗糙、不起作用、工作减弱、泄漏、不符合法规等。
B) Typical failure effects may be but not limited to the following cases: noise, abnormal working, bad appearance, instability, intermittent running, roughness, ineffectiveness, working weakening, leakage and inconformity of laws and regulations, etc. 5.8.12严重度(S) 5.8.12 Severity (S)
严重度仅适用于后果，严重度的评定准则和分级分为1—10级。严重度数值的降低只有通过 改变设计才能够实现。
Severity is only applied to effects; the severity assessment norm and grading is grade 1-10. Decrease of the severity value can only be realized through change of design. 5.8.13级别 5.8.13 Grade
填入对那些可能需要附加的设计或过程控制的部件、子系统或系统的产品特殊特性的分级(如：
关键、重要)。产品和/或过程的特殊特性符号应在此栏目中予以明确标识/注明。
Fill in the grades (e.g.: crucial, important) of the product special feature of the parts, subsystem or system that may need to attached design or process control. The special feature symbols of the products and/or process shall be identified/marked out clearly in this column. 5.8.14失效的潜在起因/机理
PFMEA控制程序 文件编号Document ID.: 版次Version: A/0 RX-QP-04 修改日期Revision Date: 页次Page: 14 /22 5.8.14 Potential cause/mechanism of failure
失效的潜在起因是指一个设计薄弱部分的迹象，其结果就是失效模式。尽可能地列出每一个失
效
模式的所有可以想到的失效起因和/或失效机理。起因/机理应尽可能简明而全面地列出，以便有针对性地采取补救的努力和/或适当的纠正措施。
The potential cause of failure refers to the indication of the weak part of a design and its result is failure mode. All failure causes and/or mechanisms of each failure mode that can be thought of as many as possible shall be listed. The causes/mechanisms shall be listed as concise and full as possible so as to take pointed remedial and/or proper corrective measures.
A)典型的失效起因可能包括但不限于下列情况：规定的材料不正确；设计寿命设想不足；应力过大；润滑能力不足；维修保养说明不充分；算法不正确；维护说明书不当；表面精加工规范不当；行程规范不足；规定的公差不当等。
A) Typical failure cause may include but not limited to the following cases: wrong specified materials, insufficient designed life assumptions, over high stress, insufficient lubricating capability, insufficient maintenance instruction, incorrect calculation, improper maintenance specification, improper surface finishing standard, insufficient stroke standard and improper specified tolerance, etc.
B)典型的失效机理可能包括但不限于下列情况：屈服；疲劳；材料不稳定性；磨损；腐蚀。 B) Typical failure mechanism may include but not limited to the following cases: yielding, fatigue, material instability, wearing and corrosion. 5.8.15频度(O) 5.8.15 Occurrence (O)
A)描述频度级别数着重在描述可能性的级别数之相对意义，而不是绝对具体的数值，频度数的取值与失效率范围有关，但并不反应实际出现的可能性。通过设计更改来预防或控制失效模式的起因/机理是可能影响频度数降低的唯一途径。潜在失效起因/机理出现频度的评定准则和分级分1—10级，在确定这个估计值时，需考虑下列问题：
A) The value describing the occurrence grade emphasizes on relative meaning of the
PFMEA控制程序 文件编号Document ID.: 版次Version: A/0 RX-QP-04 修改日期Revision Date: 页次Page: 15 /22 possibility grade but not absolutely specific value; the occurrence value is related to the range of the failure rate but not reflecting the possibility occurring actually. To prevent or control the cause/mechanism of the failure mode through change of design is the only way that may influence the decrease of the occurrence value. The assessment norm and grading of the occurrence frequency of the potential failure cause/mechanism is grade 1-10; while determining the estimated value, the following questions shall be considered:
1)类似的零部件、子系统或系统的维修档案/现场经验如何？
1) How about the maintenance archive/on-the-spot experience of similar parts and
components, subsystem or system?
2)部件是沿用以前使用水平的部件、子系统或系统，还是与其相类似？
2) Do the parts continue to use the parts, subsystem or system with formal usage level or
similar ones?
3)相对于先前水平的零部件、子系统或系统所作的变化有多显著？
3) How remarkable is the change compared with the parts, subsystem or system with formal
level?
4)零部件是否与先前水平的部件有着根本的不同？
4) Does fundamental difference exist between the parts at present and the ones with formal
level?
5)零部件是否是全新的？ 5) Are the parts brand-new? 6)零部件的用途有无变化？
6) Does the usage of the parts change or not? 7)有哪些环境改变？
7) What are the changes of environment?
8)针对该用途，是否采取了工程分析(如可靠性)来估计其预期的可比较的频度数？
8) As to this usage, whether engineering analysis (e.g.: reliability) is used to assess its
expected comparable occurrence value?