Feature classification and coding method and system for remanufacturing parts of retired engineering machinery

Abstract

The present invention discloses a method and system for feature classification and coding of remanufacturing parts of retired engineering machinery, the method comprising: remanufacturing evaluation and screening of recycled parts of retired engineering machinery; feature identification and extraction of remanufacturing parts of retired engineering machinery; creation of a feature classification and coding system architecture for remanufacturing parts of retired engineering machinery; establishment of feature coding rules for remanufacturing parts of retired engineering machinery; and implementation of a feature classification and coding system for remanufacturing parts of retired engineering machinery oriented to enterprise PDM. The present invention realizes the digital description and storage of feature information of remanufacturing parts of retired engineering machinery, improves the efficiency and level of classification management of highly dispersed and uncertain remanufacturing parts data of retired engineering machinery by the enterprise PDM system, and plays an important role in promoting the standardization, digitization, informatization and intelligence of remanufacturing technology of retired engineering machinery.

Description

Technical Field

[0001] The present invention relates to the technical field of coding of product data management, and in particular to a method and system for classifying and coding features of remanufacturing parts of retired engineering machinery for enterprise PDM. Background Art

[0002] With the rapid development of the economy, construction machinery and equipment have entered a peak period of scrapping. Remanufacturing of retired construction machinery products not only extends the product life cycle, is conducive to resource reuse and ecological environment protection, but also has huge economic value and has become a new profit growth point for the aftermarket industry.

[0003] Since the information on the source, material, quantity, specification, service and failure of retired engineering machinery parts is highly dispersed and uncertain, the remanufacturing decision is mainly based on the specific characteristics of the parts, requiring retired engineering machinery product remanufacturing enterprises to implement PDM to manage the characteristics of remanufacturing parts. Appropriate classification and coding of remanufacturing parts characteristics can enable the enterprise PDM platform and its application system to achieve digital description, storage, classification and retrieval management of retired engineering machinery remanufacturing information.

[0004] The classification and coding of remanufacturing part features is the basic work for enterprises to implement remanufacturing PDM, but there is currently no classification and coding system that can meet the needs of enterprises to implement the management of retired engineering machinery parts features through remanufacturing PDM. Conducting remanufacturing feasibility analysis on recycled scrap parts of engineering machinery equipment, identifying, screening and extracting part features that can accurately describe and characterize the remanufacturing processing information of retired engineering machinery, and constructing a part feature classification and coding system suitable for the remanufacturing of retired engineering machinery, it realizes the digital description and storage of the manufacturing information of retired engineering machinery remanufacturing parts, which is an effective way to improve the efficiency and level of enterprise data management of retired engineering machinery remanufacturing parts with high dispersion and uncertainty.

[0005] Such a part feature classification coding system is integrated into the enterprise PDM platform and forms an effective data association with other application systems on the PDM platform. With the help of part feature classification coding and application of classification methods, all related data and files on the PDM platform can be searched and directly applied to each stage of engineering machinery remanufacturing, thus shortening the design and production time and reducing the production cost. It plays an important role in promoting the standardization, digitization, informatization and intelligence of the remanufacturing technology of retired engineering machinery. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for classifying and coding features of remanufacturing parts of retired engineering machinery. For the remanufacturable scrap parts in retired engineering machinery equipment, a coding method is used to describe and characterize the part features, and through the part feature classification coding, the classification and management of the associated data of the enterprise PDM platform is realized.

[0007] To solve the above technical problems, the embodiments of the present invention provide the following solutions:

[0008] On the one hand, a method for classifying and coding features of remanufacturing parts of retired engineering machinery is provided, comprising the following steps:

[0009] S1. Evaluation and screening of remanufacturing feasibility of parts recycled from retired engineering machinery: Conduct remanufacturing feasibility evaluation on the scrap parts recycled from retired engineering machinery, and screen out remanufacturable parts as part samples;

[0010] S2. Feature recognition and extraction of remanufacturing parts of retired engineering machinery: For the selected part samples, collect part information related to the remanufacturing decision, perform feature recognition and classification of the part information through statistical analysis and cluster analysis, and extract part features on this basis;

[0011] S3. Creation of feature classification and coding system structure for remanufacturing parts of retired engineering machinery: Creating a feature classification and coding system structure for remanufacturing parts based on the extracted part features; wherein the feature classification and coding system structure for remanufacturing parts adopts a hierarchical structure of a primary feature code and its lower secondary feature code, the secondary feature code is subordinate to the primary feature code, the secondary feature code has multiple feature items, and the feature items represent different features and / or feature combinations defined in the secondary feature code;

[0012] S4. Establishment of feature coding rules for remanufacturing parts of retired engineering machinery: In the feature classification and coding system for remanufacturing parts created above, the first-level feature codes are independent of each other and can be freely combined and connected to be used as a whole or separately according to different application requirements; after determining the first-level feature code to be used and its combination and connection method, each second-level feature code belonging to the selected first-level feature code occupies a code position in the part feature code, and the digital string formed by the splicing of all code position feature values ​​constitutes the part feature code;

[0013] S5. Implementation of feature classification and coding system for remanufacturing parts of retired engineering machinery for enterprise PDM: Construct a classification and coding system for remanufacturing parts of retired engineering machinery based on computer software technology, so that it can be integrated into the enterprise PDM platform and can run independently with other application systems on the enterprise PDM platform.

[0014] Preferably, in step S1, the remanufacturing feasibility evaluation refers to an evaluation of the degree to which a part can be remanufactured, and the remanufacturable part is a part whose performance can be restored through a remanufacturing process and meet the requirements of a remanufactured product.

[0015] Preferably, in step S2, the part information includes part design information, part failure information, remanufacturing process information and part management information;

[0016] The part design information includes part structure, function, size, material and precision requirements;

[0017] The part failure information includes failure location, failure form, failure degree and failure cause;

[0018] The remanufacturing process information includes remanufacturing machining process, surface repair process and remanufacturing equipment;

[0019] The parts management information includes a part name and a part identification code.

[0020] Preferably, in step S3, the first-level feature code at least includes a part category feature code, a part material feature code, a part failure feature code and a remanufacturing process feature code;

[0021] The part category feature code is used to describe the shape, structure and function of the remanufactured parts; the secondary feature code subordinate to the part category feature code includes at least the part shape feature code, and the part structure function feature code can be set according to the needs; wherein, the part shape feature code is used to describe the basic shape category characteristics of the part, and the part structure function feature code is used to describe the subdivision of the part category by taking into account the part structure, function and name on the basis of the basic shape category of the part;

[0022] The part material feature code is used to describe the material type and blank information of the remanufactured part; the secondary feature code subordinate to the part material feature code at least includes a material type feature code and a blank type feature code; the material type feature code is used to describe the material type, and the blank type feature code is used to describe the part blank form and molding method;

[0023] The part failure feature code is used to describe the part failure information; the secondary feature code subordinate to the part failure feature code includes at least a failure form feature code and a failure structure shape feature code, and in addition, a failure structure element feature code can be set according to needs; the failure form feature code is used to describe the failure damage form characteristics, the failure structure shape feature code is used to describe the basic shape characteristics of the inner and outer surfaces of the failure part, and the failure structure element feature code is used to describe the detailed structure element characteristics possessed on the basic shape of the failure part.

[0024] The remanufacturing process characteristic code is used to describe the remanufacturing process information of the part; the secondary characteristic codes affiliated with the remanufacturing process characteristic code at least include a heat treatment characteristic code, a size characteristic code, a precision characteristic code, a machining process characteristic code and a surface repair process characteristic code; the heat treatment characteristic code is used to describe the heat treatment process for remanufacturing the part, the size characteristic code is used to describe the contour size range of the remanufacturing processing part, the precision characteristic code is used to describe the precision requirements for the remanufactured parts, the machining process characteristic code is used to describe the machining recovery process used for remanufacturing the part, and the surface repair process characteristic code is used to describe the surface repair process used for remanufacturing the part.

[0025] Preferably, in step S3, when feature items are set under the secondary feature code, the feature items do not conflict; and the number of feature items set under different secondary feature codes may be different.

[0026] Preferably, in step S3, when the part structure function feature code is set as needed, the part shape feature code and the part structure function feature code form a two-dimensional matrix structure; when the failure structure element feature code is set as needed, the failure structure shape feature code and the failure structure element feature code form a two-dimensional matrix structure.

[0027] Preferably, in step S4, the feature items of the secondary feature code are encoded with numbers or letters as feature values ​​of the code positions to ensure that the encoding is unambiguous.

[0028] On the one hand, a feature classification and coding system for remanufacturing parts of retired engineering machinery is provided, including a coding rule definition module, a coding rule database, a coding generation module and a part feature database;

[0029] The coding rule definition module is used to define, input and maintain coding rules, that is, to execute step S3 to create a feature classification coding system structure for remanufacturing parts of retired engineering machinery and step S4 to establish feature coding rules for remanufacturing parts of retired engineering machinery, and store them in the coding rule database;

[0030] The coding rule database is used to store the created feature classification coding system structure of the remanufacturing parts of retired engineering machinery and the established feature coding rules of the remanufacturing parts of retired engineering machinery;

[0031] The coding generation module is used to read the coding rules from the coding rule database, generate a corresponding interface according to the coding hierarchy and coding sequence defined in the coding rules, assist the user in determining the feature coding of the part at each code position, and finally form the part feature coding and store it in the part feature database;

[0032] The part feature database is used to store information including part names, part identification codes, and part feature codes of the remanufacturing parts of retired engineering machinery screened out in step S1.

[0033] Preferably, the encoding rule definition module is also used for:

[0034] According to different application requirements, the encoding rules in the encoding rule database are added, modified, and deleted.

[0035] Preferably, the feature classification and coding system for remanufacturing parts of retired engineering machinery is integrated with other application systems on the enterprise PDM platform; using the feature coding of parts, more information associated with the parts stored in other application systems integrated on the PDM platform can be queried and retrieved;

[0036] Among them, the part feature code is the part classification code, which is used for classification retrieval; the part identification code is the part identity identification code; in all application systems integrated on the enterprise PDM platform, the part identification code is unique to the part identification, that is, one object one code, and the part feature code and part identification code of the same part are one-to-one associated.

[0037] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:

[0038] The feature classification and coding method and coding system of the remanufacturing parts of retired engineering machinery provided by the present invention for enterprise PDM, by screening and extracting the part features of the remanufacturing parts of retired engineering machinery, adopting the coding method of letters and Arabic numerals, accurately describes and characterizes the design and process features of the remanufacturing parts of retired engineering machinery, and realizes the digital description and storage of the feature information of the remanufacturing parts of retired engineering machinery with high dispersion and uncertainty. The present invention integrates the data of the remanufacturing parts of retired engineering machinery into the enterprise PDM platform, and realizes the classification and management of the PDM platform data through the part classification coding, which is applied to various stages of engineering machinery remanufacturing, and can create conditions for enterprises to shorten the design and production time and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a flow chart of a feature classification and coding method for remanufacturing parts of retired engineering machinery provided by an embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of the structure of a feature classification and coding system for remanufacturing parts of retired engineering machinery and its integration on an enterprise PDM platform provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0043] The embodiment of the present invention first provides a method for classifying and coding features of remanufacturing parts of retired engineering machinery, such as Figure 1 As shown, the method comprises the following steps:

[0044] S1. Evaluation and screening of remanufacturing feasibility of parts recycled from retired engineering machinery: Conduct remanufacturing feasibility evaluation on scrap parts recycled from retired engineering machinery, and screen out remanufacturable parts as part samples.

[0045] In this step, the remanufacturing feasibility evaluation refers to the evaluation of the degree to which parts can be remanufactured, and the remanufacturable parts are parts whose performance can be restored through the remanufacturing process and meet the requirements of the remanufactured products.

[0046] Specifically, the feasibility evaluation of parts remanufacturing in this embodiment is to classify the scrap parts recovered from retired engineering machinery through appropriate inspection and testing after cleaning, while comprehensively considering multiple factors such as economic feasibility such as remanufacturing cost, technical feasibility such as remanufacturing accuracy and reliability, resource and environmental factors such as utilization rate of remanufactured old parts and pollution emissions.

[0047] S2. Feature identification and extraction of remanufacturing parts for retired engineering machinery: For the selected parts samples, collect part information related to the remanufacturing decision, perform feature identification and classification of the part information through statistical analysis and cluster analysis, and extract part features on this basis.

[0048] Specifically, for the screened parts samples, part information closely related to the remanufacturing processing decision is collected and recorded, including part design information such as part structure, function, size, material and precision requirements, part failure information such as failure location, failure form, failure degree and failure cause, remanufacturing process information such as remanufacturing machinery processing technology, surface repair technology and remanufacturing equipment, and part management information such as part name and part identification code; from the perspective of remanufacturing processing feature identification, feature identification and classification of part information are performed through statistical analysis and cluster analysis, and on this basis, part features that can accurately describe and characterize the remanufacturing processing parts of retired engineering machinery in terms of shape, structure, function, material, blank, failure form, failure location, processing requirements, remanufacturing process, etc. are extracted.

[0049] S3. Creation of feature classification and coding system architecture for remanufacturing parts of retired engineering machinery: Create a feature classification and coding system architecture for remanufacturing parts based on the extracted part features; wherein, the feature classification and coding system architecture for remanufacturing parts adopts a hierarchical architecture of a first-level feature code and its lower-level second-level feature code, the second-level feature code is subordinate to the first-level feature code, the second-level feature code has multiple feature items, and the feature items represent different features and / or feature combinations defined in the second-level feature code.

[0050] When feature items are set under the secondary feature code, the feature items do not conflict; the number of feature items set under different secondary feature codes may be different, as shown in Table 1.

[0051] Table 1

[0052]

[0053]

[0054] Specifically, the first-level feature code includes at least a part category feature code, a part material feature code, a part failure feature code and a remanufacturing process feature code.

[0055] The part category feature code is used to describe the shape, structure and function of the remanufactured parts; the secondary feature code belonging to the part category feature code includes at least the part shape feature code, and the part structure function feature code can be set according to the needs. Among them, the part shape feature code is used to describe the basic shape category characteristics of the part. In this embodiment, the feature item settings of the part shape feature code include the wheel type, sleeve type, pin shaft type, gear type, special-shaped shaft, special parts of the rotating parts, and the lath type, block type, box type, component type, and special parts of the non-rotating parts. The part structure function feature code is used to take into account the subdivision description of the part category based on the basic shape category of the part, taking into account the part structure, function and name. The settings of the part shape feature code and the part structure function feature code in this embodiment are shown in Table 2.

[0056] Table 2

[0057]

[0058] The part material feature code is used to describe the material type and blank information of the remanufactured parts; the secondary feature code affiliated with the part material feature code includes at least a material type feature code and a blank type feature code. The material type feature code is used to describe the material type, and the feature items of the material type are set in consideration of the material processing performance and taking into account the material composition and use performance. In this embodiment, the feature items of the material type feature code include ferrous metals, ordinary carbon steel, high-quality carbon steel, alloy structural steel, special tool steel, copper and copper alloys, aluminum and aluminum alloys, other non-ferrous metals, non-metals and combined materials. The blank type feature code is used to describe the part blank form and molding method. In this embodiment, the feature items of the blank type feature code include castings, forgings, profiles, sheet metal parts, welded parts and other blanks.

[0059] The part failure feature code is used to describe the part failure information; the secondary feature code subordinate to the part failure feature code includes at least a failure form feature code and a failure structure shape feature code, and in addition, a failure structure element feature code can be set according to requirements. The failure form feature code is used to describe the failure damage form characteristics. In this embodiment, the feature items of the failure form feature code include fracture, deformation, wear, fatigue, corrosion, aging and failure combination. The failure structure shape feature code is used to describe the basic shape characteristics of the inner and outer surfaces of the failure part. In this embodiment, the feature items of the failure structure shape feature code are used to characterize the failure surface as a plane, a cylindrical surface, a conical surface, a forming surface and a combination. The failure structure element feature code is used to describe the detailed structure element characteristics possessed on the basic shape of the failure part. When necessary, feature items can be set to characterize steps, threads, grooves, holes, fillets, bosses, pits, notches, joints and a combination of multiple structural elements.

[0060] The remanufacturing process characteristic code is used to describe the remanufacturing process information of the parts; the secondary characteristic codes subordinate to the remanufacturing process characteristic code at least include heat treatment characteristic code, size characteristic code, precision characteristic code, mechanical processing process characteristic code and surface repair process characteristic code. The heat treatment characteristic code is used to describe the heat treatment process of the parts remanufacturing. In this embodiment, the characteristic items of the heat treatment characteristic code are annealing, normalizing, quenching, tempering, surface infiltration layer treatment, surface plating, surface chemical treatment and their combinations. The size characteristic code is used to describe the contour size range of the remanufacturing processing part, and the characteristic items are used to describe the size range in sections. In this embodiment, the size characteristic code is set with two code positions, which characterize the diameter and length of the rotating surface and the length and width of the non-rotating surface. The precision characteristic code is used to describe the precision requirements of the remanufactured parts. In this embodiment, the characteristic items set by the precision characteristic code distinguish low precision, medium precision, high precision and ultra-high precision. The mechanical processing process characteristic code is used to describe the mechanical processing recovery process used for the remanufacturing of parts. In this embodiment, the characteristic items of the mechanical processing process characteristic code characterize the repair size method, benchwork recovery method, part addition method, transposition method, partial replacement and process combination. The surface repair process feature code is used to describe the surface repair process used for part remanufacturing. In this embodiment, the feature items of the surface repair process feature code are used to characterize various surface repair processes such as electroplating, spraying, deposition, welding, cladding, and adhesive repair and their combinations.

[0061] Further, in step S3, when the part structure function feature code is set as needed, the part shape feature code and the part structure function feature code form a two-dimensional matrix structure; when the failure structure element feature code is set as needed, the failure structure shape feature code and the failure structure element feature code form a two-dimensional matrix structure.

[0062] S4. Establishment of feature coding rules for remanufacturing parts of retired engineering machinery: In the feature classification and coding system for remanufacturing parts created above, the first-level feature codes are independent of each other and can be freely combined and connected to be used as a whole or separately according to different application requirements; after determining the first-level feature code to be used and its combination and connection method, each second-level feature code belonging to the selected first-level feature code occupies one code position in the part feature code.

[0063] As shown in Table 3, the feature code of the remanufactured parts of retired engineering machinery in this embodiment consists of 12 bits. The feature items of the secondary feature code are coded with numbers or letters as the feature values ​​of the code bits to ensure that the code is unambiguous. The digital string composed of all the feature values ​​of the code bits constitutes the feature code of the part.

[0064] Table 3

[0065]

[0066] Accordingly, an embodiment of the present invention also provides a feature classification and coding system for remanufacturing parts of retired engineering machinery, such as Figure 2 As shown, the system includes a coding rule definition module, a coding rule database, a coding generation module and a part feature database;

[0067] The coding rule definition module is used to define, enter and maintain coding rules, that is, to execute step S3 to create a feature classification coding system structure for remanufacturing parts of retired engineering machinery and step S4 to establish feature coding rules for remanufacturing parts of retired engineering machinery, and store them in the coding rule database; in an embodiment of the present invention, the coding rule definition module is also used to: add, modify and delete coding rules in the coding rule database according to different application requirements;

[0068] The coding rule database is used to store the created feature classification coding system structure of the remanufacturing parts of retired engineering machinery and the established feature coding rules of the remanufacturing parts of retired engineering machinery;

[0069] The coding generation module is used to read the coding rules from the coding rule database, generate a corresponding interface according to the coding hierarchy and coding sequence defined in the coding rules, assist the user in determining the feature coding of the part at each code position, and finally form the part feature coding and store it in the part feature database;

[0070] The part feature database is used to store information including part names, part identification codes, and part feature codes of the remanufacturing parts of retired engineering machinery screened out in step S1.

[0071] The part feature code can be used to search and retrieve information related to the part features specified in step S3 and step S4 in the part feature database.

[0072] Furthermore, the feature classification and coding system for remanufacturing parts of retired engineering machinery is integrated with other application systems on the enterprise PDM platform; the part feature coding can be used to query and retrieve more information associated with the parts stored in other application systems integrated on the PDM platform.

[0073] In the coding system described in the present invention, the part feature code is the part classification code, which is used for classification retrieval; the part identification code is the part identity identification code; in all application systems integrated on the enterprise PDM platform, the part identification code is unique to the part identification, that is, one object has one code, and the part feature code and part identification code of the same part are one-to-one associated.

[0074] When the part feature database is used in the design, process and manufacturing processes of an enterprise, with the help of part feature coding, part groups are divided according to different application requirements through similarity analysis of grouping technology, so as to achieve effective classification and management of the remanufacturing parts information of retired engineering machinery.

[0075] Specifically, Figure 2 For example, the enterprise PDM platform also integrates various BOM application systems for computer-aided enterprise production management, such as the design bill of materials DBOM system, the planning bill of materials PBOM system, the manufacturing bill of materials MBOM system, and the maintenance bill of materials WBOM system. The part feature database in the coding system constructed by the present invention stores the part name, part identification code, part feature coding and information related to the part feature coding of the remanufacturing parts of retired engineering machinery screened out in step S1. The part name and part identification code information can be obtained from the DBOM system. The part structure and process information required for establishing the remanufacturing part feature coding in step S4 are obtained from the DBOM system and the PBOM system.

[0076] The enterprise uses the part feature coding part to query and retrieve information related to the part features specified in step S3 and step S4 in the part feature database. For example, by querying all parts that need to adopt the laser cladding surface repair process, the material features and failure features of the parts using the laser cladding surface repair process are retrieved. The enterprise can also divide the parts into similar parts groups based on the part feature coding and the similarity analysis method of the grouping technology. On this basis, through the enterprise PDM platform, more information stored in other application systems integrated on the PDM platform that is not included in the part feature coding specified in step S3 and step S4 but is associated with the parts can be queried and retrieved. For example, the drawings of all parts using the laser cladding surface repair process are retrieved in the DBOM system for classification and filing. The process plans, process information, etc. of all parts using the laser cladding surface repair process are retrieved in the PBOM system for classification and filing. The equipment, tools, fixtures and molds required for the laser cladding surface repair process are retrieved in the MBOM system for classification and filing. In the WBOM system, the consumable parts, spare parts, and consumable parts lists that can provide the laser cladding surface repair process are retrieved for classification and filing. Therefore, when the part feature database is used in the design, process and manufacturing processes of an enterprise, with the help of part feature coding, the parts groups are divided according to different application requirements through similarity analysis of grouping technology, so as to realize effective classification and management of the remanufacturing parts information of retired engineering machinery.

[0077] In summary, the method and system for classifying and coding features of remanufacturing parts of retired engineering machinery for enterprise PDM provided by the present invention can describe and characterize the features of remanufacturable scrap parts in retired engineering machinery equipment by coding in letters and Arabic numerals, and through the classification and coding of part features, realize the classification and management of all related data on the enterprise PDM platform.

[0078] The present invention realizes the digital description and storage of characteristic information of remanufacturing parts of retired engineering machinery. It is an effective method to improve the efficiency and level of enterprise PDM system's classification management of data of remanufacturing parts of retired engineering machinery with high dispersion and uncertainty. It plays an important role in promoting the standardization, digitization, informatization and intelligentization of remanufacturing technology of retired engineering machinery.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for classifying and coding features of remanufacturing parts of retired engineering machinery, characterized in that: The following steps are involved: S1. Evaluation and screening of remanufacturing feasibility of parts recycled from retired engineering machinery: Conduct remanufacturing feasibility evaluation on the scrap parts recycled from retired engineering machinery, and screen out remanufacturable parts as part samples; S2. Feature recognition and extraction of remanufacturing parts of retired engineering machinery: For the selected part samples, collect part information related to the remanufacturing decision, perform feature recognition and classification of the part information through statistical analysis and cluster analysis, and extract part features on this basis; S3. Creation of feature classification and coding system structure for remanufacturing parts of retired engineering machinery: Creating a feature classification and coding system structure for remanufacturing parts based on the extracted part features; wherein the feature classification and coding system structure for remanufacturing parts adopts a hierarchical structure of a primary feature code and its lower secondary feature code, the secondary feature code is subordinate to the primary feature code, the secondary feature code has multiple feature items, and the feature items represent different features and / or feature combinations defined in the secondary feature code; In step S3, the first-level feature code at least includes a part category feature code, a part material feature code, a part failure feature code and a remanufacturing process feature code; The part category feature code is used to describe the shape, structure and function of the remanufactured parts; the secondary feature code subordinate to the part category feature code includes at least the part shape feature code, and the part structure function feature code can be set according to the needs; wherein, the part shape feature code is used to describe the basic shape category characteristics of the part, and the part structure function feature code is used to describe the subdivision of the part category by taking into account the part structure, function and name on the basis of the basic shape category of the part; The part material feature code is used to describe the material type and blank information of the remanufactured part; the secondary feature code subordinate to the part material feature code at least includes a material type feature code and a blank type feature code; the material type feature code is used to describe the material type, and the blank type feature code is used to describe the part blank form and molding method; The part failure feature code is used to describe part failure information; the secondary feature code subordinate to the part failure feature code includes at least a failure form feature code and a failure structure shape feature code, and in addition, a failure structure element feature code can be set according to requirements; the failure form feature code is used to describe the failure damage form characteristics, the failure structure shape feature code is used to describe the basic shape characteristics of the inner and outer surfaces of the failure part, and the failure structure element feature code is used to describe the detailed structure element characteristics possessed on the basic shape of the failure part; The remanufacturing process characteristic code is used to describe the remanufacturing process information of the part; the secondary characteristic code subordinate to the remanufacturing process characteristic code at least includes a heat treatment characteristic code, a size characteristic code, a precision characteristic code, a mechanical processing characteristic code and a surface repair process characteristic code; the heat treatment characteristic code is used to describe the heat treatment process for remanufacturing of the part, the size characteristic code is used to describe the contour size range of the remanufacturing processing part, the precision characteristic code is used to describe the precision requirements of the remanufactured part, the mechanical processing characteristic code is used to describe the mechanical processing recovery process used for remanufacturing of the part, and the surface repair process characteristic code is used to describe the surface repair process used for remanufacturing of the part; S4. Establishment of feature coding rules for remanufacturing parts of retired engineering machinery: In the feature classification and coding system for remanufacturing parts created above, the first-level feature codes are independent of each other and can be freely combined and connected to be used as a whole or separately according to different application requirements; after determining the first-level feature code to be used and its combination and connection method, each second-level feature code belonging to the selected first-level feature code occupies a code position in the part feature code, and the digital string formed by the splicing of all code position feature values ​​constitutes the part feature code; S5. Implementation of feature classification and coding system for remanufacturing parts of retired engineering machinery for enterprise PDM: A classification and coding system for remanufacturing parts of retired engineering machinery is constructed based on computer software technology, so that it can be integrated into the enterprise PDM platform and can run independently with other application systems on the enterprise PDM platform.

2. The feature classification and coding method for remanufacturing parts of retired engineering machinery according to claim 1 is characterized in that: In step S1, the remanufacturing feasibility evaluation refers to the evaluation of the degree to which a part can be remanufactured, and the remanufacturable part is a part whose performance can be restored through a remanufacturing process and meet the requirements of a remanufactured product.

3. The feature classification and coding method for remanufacturing parts of retired engineering machinery according to claim 1 is characterized in that: In step S2, the part information includes part design information, part failure information, remanufacturing process information and part management information; The part design information includes part structure, function, size, material and precision requirements; The part failure information includes failure location, failure form, failure degree and failure cause; The remanufacturing process information includes remanufacturing machining process, surface repair process and remanufacturing equipment; The parts management information includes a part name and a part identification code.

4. The feature classification and coding method for remanufacturing parts of retired engineering machinery according to claim 1 is characterized in that: In the step S3, when setting feature items under the secondary feature code, the feature items do not conflict; The number of feature items set under different secondary feature codes may be different.

5. The feature classification and coding method for remanufacturing parts of retired engineering machinery according to claim 1 is characterized in that: In step S3, when the part structure function feature code is set as needed, the part shape feature code and the part structure function feature code form a two-dimensional matrix structure; when the failure structure element feature code is set as needed, the failure structure shape feature code and the failure structure element feature code form a two-dimensional matrix structure.

6. The feature classification and coding method for remanufacturing parts of retired engineering machinery according to claim 1 is characterized in that: In step S4, the feature items of the secondary feature code are encoded with numbers or letters as the feature values ​​of the code positions to ensure that the encoding is unambiguous.

7. A feature classification and coding system for remanufacturing parts of retired engineering machinery, the system being used to implement the method according to any one of claims 1 to 6, characterized in that: The system includes a coding rule definition module, a coding rule database, a coding generation module and a part feature database; The coding rule definition module is used to define, input and maintain coding rules, that is, to execute step S3 to create a feature classification coding system structure for remanufacturing parts of retired engineering machinery and step S4 to establish feature coding rules for remanufacturing parts of retired engineering machinery, and store them in the coding rule database; The coding rule database is used to store the created feature classification coding system structure of the remanufacturing parts of retired engineering machinery and the established feature coding rules of the remanufacturing parts of retired engineering machinery; The coding generation module is used to read the coding rules from the coding rule database, generate a corresponding interface according to the coding hierarchy and coding sequence defined in the coding rules, assist the user in determining the feature coding of the part at each code position, and finally form the part feature coding and store it in the part feature database; The part feature database is used to store information including part names, part identification codes, and part feature codes of the remanufacturing parts of retired engineering machinery screened out in step S1.

8. The feature classification and coding system for remanufacturing parts of retired engineering machinery according to claim 7 is characterized in that: The encoding rule definition module is also used for: According to different application requirements, the encoding rules in the encoding rule database are added, modified, and deleted.

9. The feature classification and coding system for remanufacturing parts of retired engineering machinery according to claim 7 is characterized in that: The feature classification and coding system for remanufacturing parts of retired engineering machinery is integrated with other application systems on the enterprise PDM platform; using the feature coding of parts, more information associated with the parts stored in other application systems integrated on the PDM platform can be queried and retrieved; Among them, the part feature code is the part classification code, which is used for classification retrieval; the part identification code is the part identity identification code; in all application systems integrated on the enterprise PDM platform, the part identification code is unique to the part identification, that is, one object one code, and the part feature code and part identification code of the same part are one-to-one associated.

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