A method and system for regulating a bill of materials (BOM) of a multi-cell production line based on a minimum assembly unit

Abstract

The application discloses a kind of based on minimum assembly unit's multi-production area production line manufacturing BOM regulation method and system, without respectively preparing each production line MBOM, according to product MBOM can automatically output multi-production line MBOM, reduce repetitive workload, improve MBOM preparation efficiency.Meanwhile, when production line is adjusted, such as process adjustment between stations, station consolidation, station cancellation and the like, often means the change of station assembly parts.If according to the traditional scheme of directly preparing production line MBOM, all historical MBOM needs to be changed, and the adjustment part assembly station is adjusted.According to the method of the application, when production line is adjusted, minimum assembly unit is generally adjusted to other stations, at this time, product MBOM does not need to be changed, and only needs to adjust production line station-minimum assembly unit corresponding relationship, all production line MBOM can be calculated and output according to the latest situation of production line when recalculation, greatly reduce the change difficulty of MBOM after production line adjustment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of production management, and relates to a multi-production-area production line manufacturing BOM regulation method and system based on minimum assembly units. BACKGROUND

[0002] A bill of materials (BOM) is used to describe the composition of parts of a product and the mutual relationship between the parts. According to different needs of different stages and departments for the BOM, there are mainly several kinds of BOMs: design BOM, process BOM, manufacturing BOM, maintenance BOM, boxing BOM, quality BOM and cost BOM, etc. The BOM runs through the whole life cycle of a product and is the basis of product information and one of the most important information in a manufacturing enterprise.

[0003] The design BOM is a bill of materials used by a product design department of an enterprise to organize and manage parts required for a certain product, and defines the structural composition of the product, which is the data basis of all other forms of BOMs. The manufacturing BOM is used by a manufacturing department to describe in detail the manufacturing method and assembly sequence of a product from a part to an assembly to a final product, and is used to guide production planning, logistics pull, production error proofing, cost accounting, etc., and is the most core basic data in the manufacturing link.

[0004] The manufacturing BOM (or MBOM) is formed on the basis of the design BOM, according to the processing and manufacturing capacity of a factory and the layout of a production line, and defines the manufacturing source (self-manufacture / purchasing) of a part, a process route and an assembly process. Most large manufacturing enterprises have multiple factory areas and multiple production lines, and there are differences in process layout, equipment capacity and process division between different factory areas and production lines, which leads to different MBOMs and assembly processes of the same product in different factory areas and production lines. At present, the process personnel of an enterprise need to prepare the MBOMs of each production line according to the conditions of different factory areas and production lines, and when a design change occurs, the MBOMs of each production line need to be modified, and when a production line is adjusted, all historical MBOMs of the production line need to be modified. The above processes have much repetitive work, there is little content that can be borrowed between each other, the amount of repetitive work is large, the efficiency is low and errors are easy to occur. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art that the process personnel of an enterprise need to prepare the MBOMs of each production line according to the conditions of different factory areas and production lines, when a design change occurs, the MBOMs of each production line need to be modified, and when a production line is adjusted, all historical MBOMs of the production line need to be modified, the above processes have much repetitive work, there is little content that can be borrowed between each other, the amount of repetitive work is large, the efficiency is low and errors are easy to occur, and to provide a multi-production-area production line manufacturing BOM regulation method and system based on minimum assembly units.

[0006] To achieve the above object, the present application adopts the following technical solutions to achieve the above object:

[0007] The present application provides a kind of multi-production area production line manufacturing BOM regulation and control method based on minimum assembly unit, comprising the following steps:

[0008] Establish minimum assembly unit list and minimum assembly unit-part correspondence relationship;Establish production line station-minimum assembly unit correspondence table;

[0009] According to EBOM, minimum assembly unit list, minimum assembly unit-part correspondence relationship and production line station-minimum assembly unit correspondence table, product MBOM is formed;

[0010] According to product MBOM and production line station-minimum assembly unit correspondence table, production line MBOM is obtained, and multi-production area production line manufacturing BOM regulation and control are realized.

[0011] Preferably, the method for establishing minimum assembly unit list and minimum assembly unit-part correspondence relationship is as follows:

[0012] According to product structure similarity, product is divided into different product platforms, the structural characteristics of products in the same platform are analyzed, a group of closely related parts is divided into a minimum assembly unit, and all parts in the same product platform are divided into each minimum assembly unit to form the minimum assembly unit list of the same platform product and the minimum assembly unit-part correspondence relationship.

[0013] Preferably, when dividing minimum assembly unit, structure correlation S, function correlation F and assembly process P are analyzed.

[0014] Preferably, the method for establishing production line station-minimum assembly unit correspondence table is as follows:

[0015] For each production line producing the product, obtain the list of all stations in the production line;

[0016] According to the production line station process setting, define the minimum assembly unit of each station assembly of the production line, and form the station-minimum assembly unit correspondence relationship.

[0017] Preferably, the method for forming product MBOM is as follows:

[0018] 1) Obtain EBOM, retain EBOM hierarchical structure, and increase material properties and feeding position based on EBOM hierarchical structure;

[0019] 2) Define the material properties of all subassembly nodes, and self-made assembly / self-made subassembly itself does not need to feed, and sub-piece needs to feed;Purchased subassembly itself needs to feed, and sub-piece does not need to feed directly hidden;

[0020] 3) According to the minimum assembly unit-part correspondence table, the parts searched in the table are automatically divided into the minimum assembly unit to which they belong;

[0021] 4) For the remaining parts, the minimum assembly unit to which they belong is manually assigned;

[0022] When the number of parts belongs to different minimum assembly units, the number of parts is split and divided into different minimum assembly units;

[0023] When a new structure and new parts do not belong to the existing minimum assembly unit, a new minimum assembly unit is added to the list of minimum assembly units, and the minimum assembly unit-part correspondence and the station-minimum assembly unit correspondence are defined;

[0024] 5) All parts that need to be fed have been assigned to the minimum assembly unit, forming the product MBOM.

[0025] Preferably, the method for obtaining the production line MBOM is as follows:

[0026] Obtain the product MBOM and the production line station-minimum assembly unit correspondence table;

[0027] Process the product MBOM to process the multi-level BOM into a single-level bill of materials;

[0028] According to the single-level bill of materials and the production line station-minimum assembly unit correspondence table, obtain the list of parts that need to be assembled at each station of the production line for this product, i.e. the production line MBOM.

[0029] Preferably, the method for processing the product MBOM to process the multi-level BOM into a single-level bill of materials is as follows:

[0030] a) Establish a single-level bill of materials table: containing three columns of part number, minimum assembly unit, and quantity;

[0031] b) Read the part feeding information: starting from the first row of the BOM and processing downward, read the part number, minimum assembly unit, and quantity in the three columns of the row;

[0032] c) Delete parts that do not need to be fed: if the minimum assembly unit of a part is empty, the part does not need to be fed, and the next row is directly processed by skipping this row. This row does not need to be written into the single-level bill of materials;

[0033] d) Process split parts: if the minimum assembly unit of a part has a value, and it has multiple values, then according to the specified minimum assembly unit and quantity, split the row into multiple rows;

[0034] e) Recursively calculate the cumulative usage of the part: read the quantity of each row of parts, and query all parent levels of the part upwards until the top level of the MBOM, and read the quantity of each parent level. The cumulative usage of the part is the quantity of the part multiplied by the quantity of each parent level.

[0035] f) write the single-layer bill of material table: write the part number, minimum assembly unit and cumulative quantity of each row into the single-layer bill of material table.

[0036] Preferably, the method for obtaining the part list to be assembled at each station of the production line according to the single-layer bill of material and the production line station-minimum assembly unit correspondence table is as follows:

[0037] a) obtain the single-layer bill of material, and add the station code and station name attribute columns;

[0038] b) read the minimum assembly unit information of each row;

[0039] c) query the station to which the minimum unit belongs in the production line station-minimum assembly unit correspondence table, and write the station code and name into the row;

[0040] d) sort and group according to the station to obtain the part list and quantity of each station;

[0041] e) check the part list of each station, accumulate the quantity of the same part in the same station list, and obtain the production line MBOM.

[0042] The present application provides a system for manufacturing BOM regulation and control of a multi-production-area production line based on minimum assembly units, which comprises:

[0043] An information acquisition module, which is used to establish a minimum assembly unit list and a minimum assembly unit-part correspondence relationship, and establish a production line station-minimum assembly unit correspondence table;

[0044] A product MBOM acquisition module, which is used to form a product MBOM according to an EBOM, a minimum assembly unit list, a minimum assembly unit-part correspondence relationship and a production line station-minimum assembly unit correspondence table;

[0045] A production line MBOM acquisition module, which is used to obtain a production line MBOM according to a product MBOM and a production line station-minimum assembly unit correspondence table, so as to realize manufacturing BOM regulation and control of a multi-production-area production line.

[0046] Compared with the prior art, the present application has the following beneficial effects:

[0047] The present application proposes a kind of multi-production area production line manufacturing BOM regulation and control method based on minimum assembly unit, without respectively preparing each production line MBOM, according to product MBOM, can automatically output multi-production line MBOM, reduce the repeated workload, improve MBOM preparation efficiency.Meanwhile, when production line is adjusted, such as process adjustment between stations, station consolidation, station cancellation and the like, often mean the change of station assembly parts.If according to the traditional scheme of directly preparing production line MBOM, all historical MBOM needs to be changed, and the adjustment part assembly station is adjusted.According to the method of the present application, when production line is adjusted, minimum assembly unit is generally adjusted to other stations, at this time, product MBOM does not need to be changed, only the adjustment production line station-minimum assembly unit corresponding relationship is needed, all production line MBOM can be calculated and output according to the latest situation of production line when recalculation, greatly reduce the difficulty of MBOM change after production line adjustment.Therefore, the management and control method proposed in the present application can solve the problems existing in the prior art, and improve the preparation efficiency and accuracy of multi-production line MBOM.

[0048] The present application proposes a kind of multi-production area production line manufacturing BOM regulation and control system based on minimum assembly unit, by dividing the system into information acquisition module, product MBOM acquisition module and production line MBOM acquisition module, modular idea is used to make each module independent of each other, facilitate unified management to each module. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0050] Figure 1 For the process chart of the present application based on minimum assembly unit multi-production area production line manufacturing BOM regulation and control method.

[0051] Figure 2 For the minimum assembly unit-part corresponding relationship and production line station-minimum assembly unit corresponding chart of the present application.

[0052] Figure 3 The list chart of the present application forming product MBOM.

[0053] Figure 4 The flow chart of the present application calculating production line MBOM.

[0054] Figure 5 The overall flow chart of the present application calculating production line MBOM.

[0055] Figure 6A BOM regulation system diagram for a minimum assembly unit based multi-zone production line manufacturing of the present application. DETAILED DESCRIPTION

[0056] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0058] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0059] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0060] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0061] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The application will be described in further detail below with reference to the drawings:

[0063] The application provides a multi-production-area production line manufacturing BOM regulation method based on minimum assembly units, as shown in the figure, comprising the following steps: Figure 1

[0064] S1, establishing a minimum assembly unit list and a minimum assembly unit-part correspondence relationship; establishing a production line station-minimum assembly unit correspondence table;

[0065] The method for establishing the minimum assembly unit list and the minimum assembly unit-part correspondence relationship is as follows:

[0066] According to product structure similarity, the product is divided into different product platforms, the product structure characteristics of the same platform are analyzed, a group of parts with close relevance is divided into a minimum assembly unit, all parts in the same product platform are divided into various minimum assembly units, and the minimum assembly unit list and the minimum assembly unit-part correspondence relationship of the same platform product are formed.

[0067] When the minimum assembly unit is divided, structure relevance S, function relevance F and assembly process P are analyzed.

[0068] The method for establishing the production line station-minimum assembly unit correspondence table is as follows:

[0069] For each production line producing the product, the list of all stations in the production line is obtained;

[0070] According to the production line station process setting, the minimum assembly unit assembled by each station of the production line is defined, and the station-minimum assembly unit correspondence relationship is formed.

[0071] S2, forming a product MBOM according to the EBOM, the minimum assembly unit list, the minimum assembly unit-part correspondence relationship and the production line station-minimum assembly unit correspondence table;

[0072] The method for forming the product MBOM is as follows:

[0073] 1) obtaining the EBOM, retaining the EBOM hierarchical structure, and adding material properties and feeding positions on the basis of the EBOM hierarchical structure;

[0074] 2) defining the material properties of all sub-assembly nodes, and feeding the sub-components; the purchased sub-assembly itself needs to be fed, and the sub-components do not need to be fed and are directly hidden;

[0075] 3) according to the minimum assembly unit-part correspondence relationship table, the parts searched in the table are automatically divided into the minimum assembly unit to which the parts belong;

[0076] ​4) For the remaining parts, manually assign the minimum assembly unit to which they belong;

[0077] When there are multiple parts belonging to different minimum assembly units, split the parts and divide them into different minimum assembly units;

[0078] When a new structure or new part does not belong to an existing minimum assembly unit, add a new minimum assembly unit to the list of minimum assembly units and define the minimum assembly unit-part correspondence and the workstation-minimum assembly unit correspondence;

[0079] 5) All parts that need to be fed have been assigned to a minimum assembly unit, forming a product MBOM.

[0080] S3, according to the product MBOM and the workstation-minimum assembly unit correspondence table, obtain the workstation MBOM to realize multi-workstation manufacturing BOM control.

[0081] The method for obtaining the workstation MBOM is as follows:

[0082] Obtain the product MBOM and the workstation-minimum assembly unit correspondence table;

[0083] Process the product MBOM to a single-level bill of materials;

[0084] According to the single-level bill of materials and the workstation-minimum assembly unit correspondence table, obtain the list of parts that need to be assembled at each workstation of the production line for this product, i.e., the workstation MBOM.

[0085] The method for processing the product MBOM to a single-level bill of materials is as follows:

[0086] a) Establish a single-level bill of materials table: containing three columns of part number, minimum assembly unit, and quantity;

[0087] b) Read the part feeding information: starting from the first row of the BOM and processing downward, read the part number, minimum assembly unit, and quantity in the three columns of the row;

[0088] c) Delete parts that do not need to be fed: if the minimum assembly unit of a part is empty, the part does not need to be fed, and the next row is directly processed, and the row does not need to be written into the single-level bill of materials;

[0089] d) Process split parts: if the minimum assembly unit of a part has a value, and it has multiple values, then according to the specified minimum assembly unit and quantity, split the row into multiple rows;

[0090] e) Recursively calculate the cumulative usage of the part: read the quantity of each row of parts, and query all parent levels of the part upwards until the top level of the MBOM, and read the quantity of each parent level, and multiply the quantity of the part by the quantity of each parent level to obtain the cumulative usage of the part;

[0091] f) Write the single-level BOM table: write the part number, minimum assembly unit and cumulative quantity of each row into the single-level BOM table.

[0092] The method of obtaining the part list of the product to be assembled at each station of the production line according to the single-level BOM and the production line station-minimum assembly unit correspondence table is as follows:

[0093] a) Obtain the single-level BOM, and add the station code and station name attribute columns;

[0094] b) Read the minimum assembly unit information of each row;

[0095] c) Query the station to which the minimum unit belongs in the production line station-minimum assembly unit correspondence table, and write the station code and name into the row;

[0096] d) Sort and group according to the station to obtain the part list and quantity of each station;

[0097] e) Check the part list of each station, and accumulate the quantity of the same parts in the same station list to obtain the production line MBOM.

[0098] The specific steps are as follows:

[0099] Step 1, Establishing the product minimum assembly unit list

[0100] 1) First, divide the products into different product platforms or series according to product structure similarity, and use a set of minimum assembly units for products with similar structures in the same platform;

[0101] 2) Analyze the structural characteristics of the platform products, and divide a group of parts with close relevance, i.e. parts that cannot be split into two assembly processes, into a minimum assembly unit, and define the code and name of the minimum assembly unit; When dividing the minimum assembly unit, comprehensive analysis can be performed according to structure relevance S (non-detachable connection, detachable connection, no connection), functional relevance F (parts serving the same function, parts serving different but related functions, parts serving different functions), and assembly process P (must be assembled in the same process, preferably assembled in the same process, no assembly relationship);

[0102] 3) Divide all parts in the product platform into various minimum assembly units according to the above method to form the minimum assembly unit list and minimum assembly unit-part correspondence relationship of the platform product, as shown in Table 1. Figure 2

[0103] Step 2, Establishing the production line station-minimum assembly unit correspondence table

[0104] ​1) Build the production line structure tree for each production line of the product, i.e. the list of all stations in the production line;

[0105] 2) Define the minimum assembly unit for each station of the production line according to the station process setting, forming the station-minimum assembly unit correspondence, as shown in Figure 2

[0106] Step 3, compile product MBOM based on EBOM and minimum assembly unit

[0107] 1) Obtain EBOM, retain EBOM hierarchy, and add material attributes and feeding position (i.e. specify the minimum assembly unit to which it belongs) on this basis;

[0108] 2) Define the material attributes of all sub-assembly nodes. Self-made assemblies / self-made sub-assemblies do not need to be fed, and sub-components need to be fed. Purchased sub-assemblies need to be fed, and sub-components do not need to be fed and can be directly hidden;

[0109] 3) Define the minimum assembly unit to which each part belongs. According to the minimum assembly unit-part correspondence table, automatically divide the parts that can be retrieved in this table into the minimum assembly unit to which they belong;

[0110] 4) Manually assign the minimum assembly unit to which the remaining parts belong,

[0111] 5) If the quantity of the part has multiple minimum assembly units, the quantity can be split and divided into different minimum assembly units;

[0112] 6) If a new structure and new part do not belong to the existing minimum assembly unit, a new minimum assembly unit needs to be added to the list of minimum assembly units, and the minimum assembly unit-part correspondence and the station-minimum assembly unit correspondence need to be defined;

[0113] 7) Through the above steps, all parts that need to be fed in BOM have been assigned to the minimum assembly unit, forming the product MBOM, as shown in Figure 3

[0114] Step 4, as shown in Figure 4 and Figure 5 , calculate the production line MBOM according to the product MBOM

[0115] 1) Obtain the product MBOM according to the product number

[0116] 2) Query the station-minimum assembly unit correspondence table according to the production line number;

[0117] 3) Process the product MBOM to process the multi-level BOM into a single-level bill of materials:

[0118] ​​a) Establish a single-layer BOM table: including part number, minimum assembly unit, quantity three columns;

[0119] b) Read part feeding information: from the first row of BOM, process downward, read the part number, minimum assembly unit, quantity three columns in the row:

[0120] c) Delete unnecessary feeding parts: if the minimum assembly unit of a part is empty, it means that the part does not need to be fed, and the next row is directly processed. This row does not need to be written into the single-layer BOM;

[0121] d) Process split parts: if the minimum assembly unit of a part has a value, determine whether it is single-valued, i.e. only one minimum assembly unit is specified. If it is multi-valued, it needs to be split, and the row is split into multiple rows according to the specified minimum assembly unit and quantity;

[0122] e) Recursively calculate the cumulative usage of parts: read the quantity of each row of parts, and query all parent levels of the part upwards to the top of the MBOM, and read the quantity of each parent level. The cumulative usage of the part is the product of the part quantity and the quantity of each parent level;

[0123] f) Write to the single-layer BOM table: write each row of part number, minimum assembly unit and cumulative quantity to the single-layer BOM table.

[0124] 4) According to the single-layer BOM and the line station-minimum assembly unit correspondence table, automatically calculate the parts list that need to be assembled at each station of the production line for the product, i.e. the line MBOM.

[0125] a) Obtain the single-layer BOM and add station code and station name attribute columns;

[0126] b) Read the minimum assembly unit information of each row;

[0127] c) Query the station to which the minimum unit belongs in the line station-minimum assembly unit correspondence table, and write the station code and name to the row;

[0128] d) Sort and group according to the station to obtain the component list and quantity of each station;

[0129] e) Check the component list of each station, and accumulate the quantity of the same parts in the same station list (it is possible that the same part appears multiple times in different levels of the BOM, and is specified with different minimum assembly units, but these minimum assembly units are assembled in the same station).

[0130] f) Obtain the line MBOM, i.e. the part list details of each station during the production of the product in the line.

[0131] According to the above steps, the product MBOM in a certain production line can be calculated, and if the product is produced in multiple production lines, the MBOM of each production line can be calculated according to the above steps and the production line station-minimum assembly unit correspondence table.

[0132] The application provides a multi-production-area production line manufacturing BOM regulation system based on minimum assembly units, as shown in the figure, which comprises an information acquisition module, a product MBOM acquisition module and a production line MBOM acquisition module. Figure 6 The information acquisition module is used for establishing a minimum assembly unit list and a minimum assembly unit-part correspondence table, and establishing a production line station-minimum assembly unit correspondence table.

[0133] The information acquisition module is used for establishing a minimum assembly unit list and a minimum assembly unit-part correspondence table, and establishing a production line station-minimum assembly unit correspondence table.

[0134] The product MBOM acquisition module is used for forming a product MBOM according to the EBOM, the minimum assembly unit list, the minimum assembly unit-part correspondence table and the production line station-minimum assembly unit correspondence table.

[0135] The production line MBOM acquisition module is used for acquiring a production line MBOM according to the product MBOM and the production line station-minimum assembly unit correspondence table, so as to realize the regulation of the BOM of the multi-production-area production line.

[0136] The application provides a multi-production-area production line manufacturing BOM regulation method based on minimum assembly units, which is based on the above method based on minimum assembly units, and can automatically output the MBOM of multiple production lines according to the product MBOM, so as to reduce the repeated workload and improve the MBOM preparation efficiency. Meanwhile, when the production line is adjusted, such as the adjustment of processes between stations, the combination of stations and the cancellation of stations, the change of the assembly parts of the station is often required. According to the traditional direct production line MBOM preparation scheme, all historical MBOMs need to be changed, and the assembly station of the part needs to be adjusted. According to the method of the application, when the production line is adjusted, the minimum assembly unit is generally adjusted to other stations, at this time, the product MBOM does not need to be changed, and only the production line station-minimum assembly unit correspondence table needs to be adjusted, so that all production line MBOMs can be calculated and output according to the latest situation of the production line, thereby greatly reducing the difficulty of changing the MBOM after the adjustment of the production line.

[0137] The above is only a preferred embodiment of the application, and is not used to limit the application. For those skilled in the art, the application can have various changes and modifications. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A method for controlling the BOM (Bill of Materials) of a multi-production line based on the minimum assembly unit, characterized in that, Includes the following steps: Establish a list of minimum assembly units and the correspondence between minimum assembly units and parts; establish a correspondence table between production line workstations and minimum assembly units. Based on the EBOM, the minimum assembly unit list, the minimum assembly unit-part correspondence, and the production line station-minimum assembly unit correspondence table, the product MBOM is formed. Based on the product MBOM and the correspondence table between production line workstations and minimum assembly units, obtain the production line MBOM to achieve BOM control for multi-production area production lines; The method for forming a product MBOM is as follows: 1) Obtain the EBOM, retain the EBOM hierarchy, and add material attributes and feeding locations based on the EBOM hierarchy; 2) Define the material attributes of all sub-assembly nodes. Self-made assemblies / self-made sub-assemblies do not require material feeding, but their components do. Purchased sub-assemblies require material feeding, but their components do not and are directly hidden. 3) Based on the minimum assembly unit-part correspondence table, automatically assign the parts retrieved from the table to their respective minimum assembly units; 4) Manually assign the remaining parts to their respective smallest assembly units; When there are multiple parts belonging to different minimum assembly units, the number of parts is broken down and divided into different minimum assembly units. When a new structure or part appears that does not belong to the existing minimum assembly unit, a new minimum assembly unit is added to the minimum assembly unit list, and the correspondence between the minimum assembly unit and the part and the correspondence between the workstation and the minimum assembly unit are defined. 5) All parts requiring material input have been assigned to the smallest assembly unit to form the product MBOM.

2. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 1, characterized in that, The method for establishing the minimum assembly unit list and the correspondence between the minimum assembly unit and the part is as follows: Based on the similarity of product structure, the products are divided into different product platforms. The structural characteristics of products on the same platform are analyzed, and a group of closely related parts are divided into a minimum assembly unit. All parts in the same product platform are assigned to each minimum assembly unit, forming a list of minimum assembly units for products on the same platform and the correspondence between minimum assembly units and parts.

3. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 2, characterized in that, When dividing the smallest assembly unit, the analysis is based on structural relevance (S), functional relevance (F), and assembly processability (P).

4. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 1, characterized in that, The method for establishing the production line workstation-minimum assembly unit correspondence table is as follows: For each production line that produces products, obtain a list of all workstations in that production line; Based on the production line workstation process settings, define the smallest assembly unit for each workstation on the production line, forming a correspondence between workstation and smallest assembly unit.

5. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 1, characterized in that, The method for obtaining the production line MBOM is as follows: Obtain the correspondence table between the product MBOM and the production line workstation-minimum assembly unit; Process the product MBOM, converting multi-level BOMs into single-level bills of materials; Based on the correspondence table between the single-layer bill of materials and the production line station-minimum assembly unit, obtain the list of parts that need to be assembled at each station on the production line for the product MBOM, i.e., the production line MBOM.

6. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 5, characterized in that, The method for processing product MBOMs and converting multi-level BOMs into single-level bills of materials is as follows: a) Create a single-layer bill of materials table: including three columns: part number, smallest assembly unit, and quantity; b) Read part material information: Starting from the first row of the BOM, traverse downwards and read the part number, minimum assembly unit, and quantity of the current row. c) Delete parts that do not require material feeding: If the smallest assembly unit of a part is empty, the part does not need to be fed. Skip the current line and process the next line. The current line does not need to be written into the single-level bill of materials. d) Handling split parts: If a part has a minimum assembly unit value, and there are multiple values, then the current row will be split into multiple rows according to the specified minimum assembly unit and quantity; e) Recursively calculate the cumulative usage of parts: Read the quantity of parts in each row, and query all the parent elements of the parts up to the top level of MBOM, and read the quantity of each parent element. Multiply the quantity of parts by the quantity of each parent element to get the cumulative usage of parts. f) Write to a single-level bill of materials table: Write the part number, minimum assembly unit and cumulative quantity of each row to a single-level bill of materials table.

7. The BOM control method for multi-production line manufacturing based on the minimum assembly unit according to claim 5, characterized in that, The method for obtaining the parts list that need to be assembled at each workstation on the production line based on the correspondence between the single-layer bill of materials and the production line station-minimum assembly unit is as follows: a) Obtain a single-layer bill of materials and add workstation code and workstation name attribute columns; b) Read the minimum assembly unit information for each line; c) Query the workstation-minimum assembly unit correspondence table on the production line and write the workstation code and name into the current row; d) Sort and group by workstation to obtain a list of components and quantities for each workstation; e) Check the component list for each workstation, and add up the quantities of the same parts in the same workstation list to obtain the production line MBOM.

8. A system employing the BOM control method for multi-production line manufacturing based on the minimum assembly unit as described in any one of claims 1 to 7, characterized in that, include: The information acquisition module is used to establish a list of minimum assembly units and the correspondence between minimum assembly units and parts; and to establish a correspondence table between production line workstations and minimum assembly units. The product MBOM acquisition module is used to generate the product MBOM based on the EBOM, the minimum assembly unit list, the minimum assembly unit-part correspondence relationship, and the production line station-minimum assembly unit correspondence table. The production line MBOM acquisition module is used to acquire the production line MBOM based on the product MBOM and the correspondence table between the production line workstation and the smallest assembly unit, so as to realize the BOM control of multi-production area production line manufacturing.

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