Basic DFMEA construction method and construction system

Abstract

The invention belongs to the technical field of function failure analysis, and particularly relates to a basic DFMEA construction method and system, and the method comprises the steps: selecting an analysis object; obtaining a required function module according to the analysis object; in the virtual layer, obtaining a scheme corresponding to each function module, and selecting an adaptive scheme; in the virtual layer, corresponding parts are obtained according to an adaptive scheme, and a primary version DFMEA is formed; configuring according to the parts to form a final DFMEA; according to the method, the project DFMEA structure tree is screened and established through the function division labels, so that the content of the basic FMEA required by each project can be accurately selected, and the problem of poor accuracy of construction of the traditional basic DFMEA when dealing with the project FMEA is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional failure analysis, and in particular relates to a construction method and a construction system of a basic DFMEA. Background Art

[0002] In the automotive industry, the design time of lamps has been greatly reduced. As the design time is reduced, engineers are busy catching up with the customer's deadlines. It is often difficult to identify the potential failure analysis of lamp design in a specific and comprehensive manner. Based on this demand, DFMEA came into being. According to the principle of building a structure tree of the new version of DFMEA, it is: upper-level customer-assembly-subsystem-parts, and then perform functional failure analysis based on the structure tree, prevent failures, and use corresponding detection measures to verify whether the proposed preventive measures are effective.

[0003] For assembly lamps with complex functions and many parts, if they are analyzed step by step according to the seven-step method, engineers will need to spend a lot of time and energy, which is inconsistent with the customer's need to shorten the R&D cycle and launch new products at a fast pace. However, in order to ensure product quality, the seven-step FMEA analysis is essential. Due to this demand, many companies mostly adopt the establishment of basic DFMEA, and when applying it to the project, they only need to call the corresponding DFMEA content. However, for the establishment of basic DFMEA, most companies still stay in the traditional seven-step method. After planning and preparation, structural analysis is carried out to split the lamps into various subsystems, and then each subsystem is split into corresponding parts. This splitting method is suitable for assemblies composed of parts with only a single function, but it is not suitable for assemblies with more complex structures composed of multiple functions integrated into one part. The reasons are as follows: After the subsystems are divided, only one part is allowed to appear on the structure tree, but the part not only works in subsystem 1, but also in subsystem 2. If the part is placed in subsystem 1 on the structure tree, the structure tree for subsystem 2 will be missing. If the functional failure analysis of the part for subsystem 2 is placed on subsystem 1, the functional analysis of subsystem 1 will be redundant and the correspondence will be poor. The schematic diagram is shown in Figure 1 This division method requires engineers to determine the specific parts of the lamp at the beginning of planning, which is contrary to the actual project design process, because it is not possible to determine which parts are actually used at the beginning of the project, and as the customer's needs continue to change during the project, its timely adjustment and response capabilities are also poor, because if the customer switches the plan, the corresponding parts need to be re-selected, and if it contains multifunctional parts, the analysis of other subsystems will also be affected. This will greatly increase the application of basic DFMEA to project DFMEA.

[0004] Therefore, based on the above technical problems, it is necessary to design a new basic DFMEA construction method and construction system. Summary of the invention

[0005] The embodiments of the present disclosure at least provide a method and system for constructing a basic DFMEA.

[0006] In a first aspect, the present disclosure provides a method for constructing a basic DFMEA, comprising the following steps: Select the object of analysis; Obtain the required functional modules according to the analysis object; In the virtual layer, obtain the solution corresponding to each functional module and select the appropriate solution; In the virtual layer, the corresponding parts are obtained according to the adapted solution to form the initial version of DFMEA; The final DFMEA is formed based on the configuration of the parts.

[0007] Further, the selection of analysis objects includes: Select the objects on the vehicle that you want to analyze.

[0008] Further, the function modules required for obtaining the analysis object include: After selecting the analysis object, the corresponding functional module is obtained according to the function of the analysis object.

[0009] Further, the obtaining of the solution corresponding to each functional module and selecting the adapted solution includes: Constructing a database, wherein the database stores all corresponding solutions of the functional modules corresponding to all analysis objects; In the virtual layer, after obtaining the functional module, all corresponding solutions of the functional module are obtained from the database; Obtain implementation solutions from all corresponding solutions based on customer needs and actual conditions.

[0010] Further, the obtaining of corresponding parts according to the adapted solution and forming a preliminary version of DFMEA includes: In the virtual layer, the corresponding virtual functional parts are matched according to the implementation plan to build the initial version of DFMEA based on the virtual functional parts; Virtual functional parts are: in basic FMEA, part functions are disassembled according to the plan, and virtual parts are used to carry the functions. Project FMEA generates preliminary analysis content by implementing the plan configuration to guide the design of new projects. Through the BOM configuration interface, the virtual parts with various functions are configured with the project BOM to generate the final FMEA report.

[0011] Further, configuring the parts to form the final version of DFMEA includes: Configure the virtual functional parts in the initial version of DFMEA with the corresponding actual parts to build the final version of DFMEA, and perform functional failure analysis based on the final version of DFMEA.

[0012] Furthermore, the actual part appears only once in the final DFMEA.

[0013] In a second aspect, the present disclosure also provides a construction system using the above-mentioned basic DFMEA construction method, including: A selection module configured to select an analysis object; An acquisition module, which is configured to acquire required functional modules according to an analysis object; A solution selection module is configured to obtain a solution corresponding to each functional module and select an adapted solution; A preliminary version module, which is configured to obtain corresponding parts according to the adapted solution and form a preliminary version of DFMEA; The final version module is configured to form a final version DFMEA according to the parts.

[0014] In a third aspect, an embodiment of the present disclosure further provides a computer device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above-mentioned basic DFMEA construction method.

[0015] In a fourth aspect, an embodiment of the present disclosure further provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the above-mentioned basic DFMEA construction method.

[0016] The beneficial effect of the present invention is that the construction method of the basic DFMEA includes: selecting an analysis object; obtaining the required functional modules according to the analysis object; obtaining the solution corresponding to each functional module and selecting an adapted solution; obtaining corresponding parts according to the adapted solution to form a preliminary version of DFMEA; configuring the parts to form a final version of DFMEA; and establishing a project DFMEA structure tree by filtering through functional division labels, so that the basic FMEA content required for each project can be accurately selected, solving the problem of poor accuracy of the construction of traditional basic DFMEA when dealing with project FMEA.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A flowchart of a method for constructing a basic DFMEA provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of a structure tree of a basic DFMEA construction method provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0023] After research, it was found that the shortcomings of the existing technology are as follows: According to the traditional analysis method, first, it is necessary to list all the application scenarios of the structural analysis and functional failure analysis of each level of the basic DFMEA, which leads to the need for each project engineer to delete the structural analysis and functional failure analysis of each level according to the project needs after calling the basic FMEA library to the project DFMEA. If the project has too many parts, it will increase the workload of the project engineer, and this deletion of the structural functional failure analysis also has high requirements for the engineer's ability; second, DFMEA analysis is a dynamic analysis process. During the project design process, customer needs are constantly changing. The following three impacts will be produced on the DFMEA structure tree: 1. If the customer cancels a certain function and the parts implementing the function include multi-functional parts, the analysis of other functions will also be affected. In the traditional basic DFMEA, it is difficult to quickly switch solutions; 2. If the customer does not change the function but changes the implementation solution, if the parts implementing the solution include multi-functional parts, the analysis of other subsystems will also be affected. In the traditional basic DFMEA, it is difficult to quickly switch solutions; 3. The solution layer remains unchanged and the functional parts used to implement the solution need to be merged. When merging, it will be difficult to put the new parts generated after the merger in a certain subsystem.

[0024] Therefore, based on the analysis of the above situation, the application of traditional basic DFMEA in project DFMEA has the following disadvantages: 1. It requires high ability to conduct FMEA analysis, which places high demands on personnel ability; 2. At the beginning of its establishment, it is impossible to reasonably and accurately select the content of DFMEA according to different project requirements, and the accuracy is poor; 3. At the beginning of its establishment, the workload of engineers is increased to judge and delete the basic DFMEA content that does not meet the project requirements; 4. After its establishment, it is impossible to quickly update DFMEA according to customer changes, and the flexibility is poor; 5. Based on the above 4 points, the applicability and timeliness of project application are poor, so the potential risks of the project cannot be prevented in time, and the effect is not good; (1) At the beginning of its establishment, it is impossible to reasonably and accurately select the content of DFMEA according to different project requirements, and the accuracy is poor, which requires engineers to judge and delete the basic DFMEA content that does not meet the project requirements according to project requirements. While increasing the workload of engineers, it also puts forward higher requirements on the engineers' abilities; (2) After its establishment, it is impossible to quickly update DFMEA according to customer changes or the actual needs of the project, and the flexibility is poor.

[0025] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0026] like Figure 1As shown, at least one disclosed embodiment provides a method for constructing a basic DFMEA, comprising the following steps: selecting an analysis object; obtaining the required functional modules according to the analysis object; obtaining the solution corresponding to each functional module in the virtual layer, and selecting an adapted solution; obtaining the corresponding parts in the virtual layer according to the adapted solution to form a preliminary version of DFMEA; configuring the parts to form a final version of DFMEA; establishing a project DFMEA structure tree by filtering through functional division labels, so that the basic FMEA content required for each project can be accurately selected, solving the problem of poor accuracy of the construction of traditional basic DFMEA when dealing with project FMEA; and solving the problem of the inability of traditional basic DFMEA to construct a project DFMEA structure tree. The method is to quickly update DFMEA according to the situation that the customer's changing needs or the actual need for the project to merge parts; use functional division to establish a structure tree, and for each functional module and each solution used to implement it, disassemble it into each single function, and its functional failure analysis and detection and prevention measures are not repeated. The single functional part has a virtual part corresponding to it in the basic DFMEA library. When it is necessary to merge parts, it is only necessary to establish a corresponding relationship between the virtual parts involved and the actual parts on the project FMEA. When the project FMEA is generated, the parts have been merged, and the functional failure analysis and detection and prevention measures of the virtual parts in the basic DFMEA will also be merged. In this way, it is possible to quickly respond to the situation where the project FMEA needs to be updated due to the combination of parts.

[0027] The construction method of basic DFMEA includes multiple levels of labels. The first level is the first-level label layer, focusing on the vehicle; the second level is the second-level label layer, focusing on the lamp (used to select the type of lamp: rear combination lamp, headlight, small lamp); the third level is the third-level label layer, focusing on each functional module (mainly divided by function, allowing the non-existence of corresponding physical objects), this level is the virtual layer (the virtual layer will not be reflected when the project DFMEA is finally generated, and no functional failure analysis will be performed), used to select the function of the lamp; the fourth level is the fourth-level label layer, focusing on the implementation scheme of each functional module. For each functional module, there are many implementation schemes, but when it comes to specific projects, the scope of scheme selection will be further narrowed according to project requirements, cost requirements, etc. Engineers will select the most reasonable scheme after comprehensive consideration of various aspects. According to different implementation schemes, the virtual functional parts required are also different, and this layer is also a virtual layer. The fifth level, which will be automatically brought out after the fourth level is selected, is the virtual functional parts layer for implementing each scheme.

[0028] In one embodiment, the selection of the analysis object includes: selecting the object to be analyzed on the vehicle; the first step: selecting the focus object, taking the headlight as an example, there are three options: headlight, rear combination lamp, small lamp. In this embodiment, the rear combination lamp is taken as an example, Figure 2As shown, after selecting the corresponding lamp, the basic FMEA will automatically bring over its parent vehicle and its corresponding FMEA analysis.

[0029] In one embodiment, the method of obtaining the required functional modules according to the analysis object includes: after selecting the analysis object, obtaining the corresponding functional modules according to the functions of the analysis object; in the second step, according to the rear combination lamp selected in the first step, it is necessary to select the functional modules that realize the functions of the lamp. For example, for the rear combination lamp position, the corresponding functional modules are: signal lamp light module, loading module, support module, etc. This layer is a virtual layer, also a label layer, which is used to select the corresponding functional modules according to different projects. Taking the signal lamp light module as an example, the selected label is as follows: Figure 2 shown.

[0030] In one embodiment, the method of obtaining the corresponding solution for each functional module and selecting an adapted solution includes: constructing a database, wherein the database stores all corresponding solutions for the functional modules corresponding to all analysis objects; in the virtual layer, after obtaining the functional module, obtaining all corresponding solutions for the functional module from the database; obtaining implementation solutions from all corresponding solutions according to customer needs and actual conditions; in the third step, after selecting the functional module layer, it is necessary to select corresponding solutions to implement the functions of each module. Here, the basic DFMEA will enumerate all solutions (all solutions can be retrieved from the database), while the project DFMEA only needs to select corresponding solutions according to customer needs and the actual project. This layer is a virtual layer, also a label layer, which is used to select appropriate implementation solutions; combined with the case, assuming that the rear combination lamp needs steering, braking, and rear fog functions in the signal lamp light module, the selected labels are as follows: Figure 2 As shown; In one embodiment, the step of obtaining corresponding parts according to the adapted solution to form a preliminary DFMEA includes: in the virtual layer, matching corresponding virtual functional parts according to the implementation solution to construct a preliminary DFMEA according to the virtual functional parts; Step 4: After the completion of the third step, the virtual functional parts required for the project are automatically brought out, such as Figure 2 As shown in the figure, the FMEA analysis of these virtual functional parts and assemblies, i.e., lamps, has been established in the FMEA library. After the functional parts required for the project FMEA are identified, the first version of DFMEA for the project has been generated, as shown in the figure. Figure 2 As shown in the figure, the functional failure analysis and preventive detection measures of the first version of DFMEA established by function can merge two virtual functional parts and correspond to the actual parts of the project DFMEA when the project requires it. The actual parts of the project can quickly inherit the functional failure analysis and preventive detection measures analysis of these two parts.

[0031] Virtual functional parts are: in basic FMEA, part functions are disassembled according to the plan, and virtual parts are used to carry the functions. Project FMEA generates preliminary analysis content by implementing the plan configuration to guide the design of new projects. In the project freezing stage, the virtual parts with various functions are configured with the project BOM through the BOM configuration interface to generate the final FMEA report, avoiding a large amount of content adjustment work in the FMEA analysis report caused by the process design plan adjustment.

[0032] In one embodiment, the configuration according to the parts to form the final version of DFMEA includes: automatically configuring the virtual functional parts in the initial version of DFMEA to the corresponding actual parts to build the final version of DFMEA, and performing functional failure analysis according to the final version of DFMEA; the fifth step: according to the actual project, configuring the initial version of the project DFMEA with the actual parts of the project, and finally generating the final version of the project DFMEA that meets the actual project situation, such as Figure 2 As shown. After these five steps, the project DFMEA required for each project can be generated with one click, saving time and effort. And this method is highly flexible, targeted and has strong coverage. It solves the problem that the traditional basic DFMEA cannot quickly update DFMEA according to the customer's changing needs or the actual need for the project to combine parts. The function is divided to establish a structure tree. For each functional module and each solution used to implement it, it is disassembled into each single function. Its functional failure analysis and detection and prevention measures are not repeated, and the single functional part has a virtual part corresponding to it in the basic DFMEA library. When it is necessary to combine parts, it is only necessary to establish a corresponding relationship between the virtual parts involved and the actual parts on the project FMEA. When the project FMEA is generated, the parts have been merged, and the functional failure analysis and detection and prevention measures of the virtual parts in the basic DFMEA will also be merged. In this way, it is possible to quickly respond to the situation where the project FMEA needs to be updated due to the combination of parts.

[0033] In one embodiment, the actual part in the final version of the DFMEA only appears once, that is, the same part is not allowed to appear repeatedly in the structure tree.

[0034] In at least one disclosed embodiment, a construction system using the construction method of the basic DFMEA is also provided, including: a selection module, which is configured to select an analysis object; an acquisition module, which is configured to acquire required functional modules according to the analysis object; a solution selection module, which is configured to acquire the solution corresponding to each functional module and select an adapted solution; a preliminary version module, which is configured to acquire corresponding parts according to the adapted solution to form a preliminary version of DFMEA; and a final version module, which is configured to configure according to the parts to form a final version of DFMEA.

[0035] At least one disclosed embodiment further provides a computer device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the above-mentioned basic DFMEA construction method.

[0036] At least one disclosed embodiment further provides a computer-readable storage medium having a computer program / instruction stored thereon, which implements the steps of the above-mentioned basic DFMEA construction method when executed by a processor.

[0037] In summary, the construction method of this basic DFMEA includes: selecting the analysis object; obtaining the required functional modules according to the analysis object; obtaining the corresponding solutions for each functional module and selecting the adapted solutions; obtaining the corresponding parts according to the adapted solutions to form the initial version of DFMEA; configuring the parts to form the final version of DFMEA; and establishing the project DFMEA structure tree through functional division label screening, so as to accurately select the basic FMEA content required for each project, solving the problem of poor accuracy of the construction of traditional basic DFMEA when dealing with project FMEA.

[0038] Without departing from the scope of the present disclosure, the discrete or separate techniques, systems, subsystems, and methods described and illustrated in the various embodiments may be combined or integrated with other systems, modules, techniques, or methods. Other items shown or discussed as coupled may be directly connected, or may be indirectly coupled or communicated electrically, mechanically, or otherwise through some interface, device, or intermediate component. Other examples of changes, substitutions, and alterations may be determined by those skilled in the art without departing from the spirit and scope disclosed herein.

Claims

1. A method for constructing a basic DFMEA, characterized in that: The following steps are involved: Select the object of analysis; Obtain the required functional modules according to the analysis object; In the virtual layer, obtain the solution corresponding to each functional module and select the appropriate solution; In the virtual layer, the corresponding parts are obtained according to the adapted solution to form the initial version of DFMEA; The final DFMEA is formed based on the configuration of the parts.

2. The method for constructing a basic DFMEA as claimed in claim 1, characterized in that: The selected analysis object includes: Select the objects on the vehicle that you want to analyze.

3. The method for constructing a basic DFMEA as claimed in claim 2, characterized in that: The function modules required for obtaining the analysis object include: After selecting the analysis object, the corresponding functional module is obtained according to the function of the analysis object.

4. The method for constructing a basic DFMEA as claimed in claim 3, characterized in that: The obtaining of the solution corresponding to each functional module and selecting the adapted solution includes: Constructing a database, wherein the database stores all corresponding solutions of the functional modules corresponding to all analysis objects; In the virtual layer, after obtaining the functional module, all corresponding solutions of the functional module are obtained from the database; Obtain implementation solutions from all corresponding solutions based on customer needs and actual conditions.

5. The method for constructing a basic DFMEA as claimed in claim 4, characterized in that: The process of obtaining corresponding parts according to the adapted solution and forming a preliminary version of DFMEA includes: In the virtual layer, the corresponding virtual functional parts are matched according to the implementation plan to build the initial version of DFMEA based on the virtual functional parts; Virtual functional parts are: in basic FMEA, part functions are disassembled according to the plan, and virtual parts are used to carry the functions. Project FMEA generates preliminary analysis content by implementing the plan configuration to guide the design of new projects. Through the BOM configuration interface, the virtual parts with various functions are configured with the project BOM to generate the final FMEA report.

6. The method for constructing a basic DFMEA as claimed in claim 5, characterized in that: The configuration according to the parts to form the final version of DFMEA includes: The virtual functional parts in the initial version of DFMEA are automatically configured with the corresponding actual parts to build the final version of DFMEA, and functional failure analysis is performed based on the final version of DFMEA.

7. The method for constructing a basic DFMEA as claimed in claim 6, characterized in that: The actual part appears only once in the final DFMEA.

8. A construction system using the construction method of the basic DFMEA as claimed in claim 1, characterized in that: include: A selection module configured to select an analysis object; An acquisition module, which is configured to acquire required functional modules according to an analysis object; A solution selection module is configured to obtain a solution corresponding to each functional module and select an adapted solution; A preliminary version module, which is configured to obtain corresponding parts according to the adapted solution and form a preliminary version of DFMEA; The final version module is configured to form a final version DFMEA according to the parts.

9. A computer device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method for constructing the basic DFMEA according to claim 1.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method for constructing the basic DFMEA as claimed in claim 1 are implemented.

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