CN113449154B - FMEA analysis method and system - Google Patents
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Abstract
The invention relates to an FMEA analysis method and system. The method comprises the following steps: determining the structure of the product and the current process route; dividing the devices in the product structure according to the functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; respectively determining a function tree of the virtual part and a function tree of the black box part according to the product structure and the current process route; determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part; determining the risk and the risk reason of completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route. The invention can rapidly locate the failure position and cause and improve the efficiency and quality of product design.
Description
Technical Field
The invention relates to the field of failure analysis, in particular to an FMEA analysis method and system.
Background
Failure mode and impact analysis, i.e. "latent failure mode and outcome analysis", or simply FMEA. FMEA is a systematic activity that analyzes the subsystems, parts, and individual processes that make up the product, one by one, in the product design stage and the process design stage, finds out all potential failure modes, and analyzes their possible consequences, thereby taking necessary measures in advance to improve the quality and reliability of the product.
However, due to the complexity and diversity of the product structure, the position and reason of failure cannot be rapidly located in the existing FMEA analysis method, and phenomenon control measures cannot be timely adopted, so that the quality of the product is not satisfactory.
Disclosure of Invention
The invention aims to provide an FMEA analysis method and system, which can rapidly locate the failure position and cause and improve the efficiency and quality of product design.
In order to achieve the above object, the present invention provides the following solutions:
a FMEA analysis method, comprising:
determining the structure of the product and the current process route;
dividing the devices in the product structure according to the functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product;
respectively determining a function tree of the virtual part and a function tree of the black box part according to the product structure and the current process route; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part;
determining the risk and the risk reason of completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route.
Optionally, the determining the failure tree of the virtual part and the failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part specifically includes:
describing the failure corresponding to each function in the function tree;
and determining the relation between the failure of the upper-level product structure and the failure of the lower-level product structure, and generating a failure tree.
Optionally, the determining, according to the failure tree, the risk and the risk reason of completing the product according to the current process route further includes:
and (3) generating a failure map according to the risk and the risk reason of the finished product in the current process route, and performing active maintenance.
An FMEA analysis system, comprising:
the product determining module is used for determining a product structure and a current process route;
the product dividing module is used for dividing the devices in the product structure according to the functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product;
the functional tree determining module is used for respectively determining the functional tree of the virtual part and the functional tree of the black box part according to the product structure and the current process route; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
the failure tree determining module is used for determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part;
the analysis module is used for determining the risk and the risk reason of completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route.
Optionally, the failure tree determining module specifically includes:
the failure description unit is used for describing the failure corresponding to each function in the function tree;
and the failure tree determining unit is used for determining the relationship between the failure of the upper-level product structure and the failure of the lower-level product structure and generating a failure tree.
Optionally, the method further comprises:
and the failure map determining and maintaining module is used for generating a failure map according to the risk and the risk reason of the finished product of the current process route and performing active maintenance.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the FMEA analysis method and system provided by the invention, in order to quickly find the possible position and possible reason of a specific failure and quickly take phenomenon control measures and prevent, the design drawing of the product is enabled to be more in line with the actual service requirements through the virtual layer marking function, meanwhile, the virtual layer product and the actual functional product can be clearly distinguished in the structural design of the product, so that the design of the product is more reasonable, redundancy is avoided, the design responsibility is quickly distinguished through the black box part function, and the waste of design work and the requirement that the quality of the product is unsatisfied due to the non-professional design are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a FMEA analysis method provided by the present invention;
FIG. 2 is a schematic view of a black box component structure;
FIG. 3 is a schematic view of a virtual part structure;
FIG. 4 is a schematic diagram of a failure map;
fig. 5 is a schematic structural diagram of an FMEA analysis system according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an FMEA analysis method and system, which can rapidly locate the failure position and cause and improve the efficiency and quality of product design.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is a schematic flow chart of an FMEA analysis method provided by the present invention, and as shown in fig. 1, the FMEA analysis method provided by the present invention includes:
s101, determining a product structure and a current process route;
s102, dividing devices in the product structure according to functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product; namely, the structure names having no actual function requirements are marked as virtual parts, and as shown in fig. 3, the structure names having function requirements but no design responsibility are marked as black box parts, and as shown in fig. 2.
S103, respectively determining a function tree of the virtual part and a function tree of the black box part according to the product structure and the current process route; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
s104, determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part;
s104 specifically comprises:
describing the failure corresponding to each function in the function tree;
and determining the relation between the failure of the upper-level product structure and the failure of the lower-level product structure, and generating a failure tree.
As a specific embodiment, according to the principle of top-down transmission of product structure functions, the support of the lower structure functions required to be passed by the current structure functions is judged from the professional angle by FMEA team members in the upper function failure matrix, and if the support relation exists, the function and failure association relation, namely the failure tree, can be generated by double-click association in the function failure matrix.
S105, determining risks and risk reasons for completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route. And dynamically updating the failure tree.
Also included after S105 is:
and (3) generating a failure map according to the risk and the risk reason of the finished product in the current process route, and performing active maintenance.
The failure map is shown in fig. 4, and the failure map function can be used for quickly searching the specific reference information of the failure with the unique identification failure number in the FMEA, and quickly searching the failure reason and the current control measures of each different reference node position; the risk of focusing before failure occurs can also be focused, and error proofing is well done; after failure occurs, the position information and detailed failure cause analysis for FMEA failure analysis can be reversely checked, the teaching training is updated to correspond to FMEA, and the failure control experience is transversely expanded to other products, so that the purpose of preventing and re-generating risks is achieved. The virtual piece is marked in the structural design of the product, so that the function of the product can be reasonably displayed, and redundant design is avoided. The black box part is marked in the structural design of the product, so that the design responsibility can be clearly distinguished, and the design efficiency and quality of the product are improved.
Fig. 5 is a schematic structural diagram of an FMEA analysis system according to the present invention, and as shown in fig. 5, the FMEA analysis system according to the present invention includes:
a product determination module 501 for determining a product structure and a current process route;
the product dividing module 502 is configured to divide the devices in the product structure according to functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product;
a function tree determining module 503, configured to determine a function tree of the virtual part and a function tree of the black box part according to the product structure and the current process route, respectively; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
a failure tree determining module 504, configured to determine a failure tree of the virtual component and a failure tree of the black box component according to the function tree of the virtual component and the function tree of the black box component;
an analysis module 505, configured to determine, according to the failure tree, a risk and a risk cause of completing the product according to the current process route; and returning to the step of determining the product structure and the current process route, and updating the process route.
The failure tree determination module 504 specifically includes:
the failure description unit is used for describing the failure corresponding to each function in the function tree;
and the failure tree determining unit is used for determining the relationship between the failure of the upper-level product structure and the failure of the lower-level product structure and generating a failure tree.
The invention provides an FMEA analysis system, which further comprises:
and the failure map determining and maintaining module is used for generating a failure map according to the risk and the risk reason of the finished product of the current process route and performing active maintenance.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A FMEA analysis method, comprising:
determining the structure of the product and the current process route;
dividing the devices in the product structure according to the functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product;
respectively determining a function tree of the virtual part and a function tree of the black box part according to the product structure and the current process route; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part;
determining the risk and the risk reason of completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route.
2. A FMEA analysis method as in claim 1, wherein said determining the failure tree of the virtual part and the failure tree of the black box part based on the function tree of the virtual part and the function tree of the black box part comprises:
describing the failure corresponding to each function in the function tree;
and determining the relation between the failure of the upper-level product structure and the failure of the lower-level product structure, and generating a failure tree.
3. A FMEA analysis method as in claim 1 wherein said determining risk and risk cause for completing a product according to a current process route from a failure tree further comprises:
and (3) generating a failure map according to the risk and the risk reason of the finished product in the current process route, and performing active maintenance.
4. An FMEA analysis system, comprising:
the product determining module is used for determining a product structure and a current process route;
the product dividing module is used for dividing the devices in the product structure according to the functions of different devices in the product structure; the dividing structure is a virtual piece, a black box piece or a border piece; the virtual piece is a device with the functions of the upper product structure capable of being directly transferred to the lower product structure and without actual functions; the black box piece is of a structure which meets the functional requirements of the current product design; the edge piece is an existing structure in the product;
the functional tree determining module is used for respectively determining the functional tree of the virtual part and the functional tree of the black box part according to the product structure and the current process route; the function tree is the relation between the functions of the upper-level product structure and the functions of the lower-level product structure;
the failure tree determining module is used for determining a failure tree of the virtual part and a failure tree of the black box part according to the function tree of the virtual part and the function tree of the black box part;
the analysis module is used for determining the risk and the risk reason of completing the product according to the current process route according to the failure tree; and returning to the step of determining the product structure and the current process route, and updating the process route.
5. The FMEA analysis system as in claim 4, wherein said failure tree determination module comprises:
the failure description unit is used for describing the failure corresponding to each function in the function tree;
and the failure tree determining unit is used for determining the relationship between the failure of the upper-level product structure and the failure of the lower-level product structure and generating a failure tree.
6. A FMEA analysis system as in claim 4, further comprising:
and the failure map determining and maintaining module is used for generating a failure map according to the risk and the risk reason of the finished product of the current process route and performing active maintenance.
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| CN114564854B (en) * | 2022-04-29 | 2022-07-26 | 希维科技(广州)有限公司 | Operation method and equipment of data node supporting FMEA bidirectional relationship tree |
| CN114564855B (en) * | 2022-04-29 | 2022-07-26 | 希维科技(广州)有限公司 | Operation method based on incidence relation of FMEA data nodes and electronic equipment |
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