An assembly process method for an aircraft pulse assembly production line

Abstract

The present invention discloses an assembly process method for an aircraft pulsating final assembly production line, which relates to the technical field of large-scale production line assembly. The assembly process method for the aircraft pulsating final assembly production line includes determining the assembly tasks and required output of the aircraft final assembly production line, planning the layout and process of the aircraft pulsating production line, rationally dividing the system assembly process separation surface within each station, designing a detailed assembly process flow within each station, calculating the station assembly cycle, establishing an aircraft final assembly pulsating production line, and verifying and improving the aircraft final assembly production line. The assembly process method for the aircraft pulsating final assembly production line plans the entire process from task determination to production line implementation verification in detail and systematically. By rationally planning the assembly process flow and resource allocation of the final assembly production line, the assembly cycle is shortened, the aircraft final assembly efficiency is improved, and the dual improvement of production efficiency and product quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of large-scale production line assembly, and in particular to an assembly process method for an aircraft pulse-type final assembly production line. Background Art

[0002] The main work content of aircraft final assembly is to connect the manufactured aircraft structural components, install, debug and test various functional devices and functional systems, so that the aircraft has an integrated flight function and usage function. It involves many types of work, high professionalism, many professional interfaces, many intersections, complex technology and complex coordination relationships.

[0003] With the promotion of experience from foreign aircraft final assembly production lines, domestic aviation companies have gradually begun to adopt station-type or pulsating final assembly lines when developing new aircraft. Due to differences in understanding of aircraft configuration management and production management, various aviation companies have adopted different aircraft final assembly production line assembly process design ideas and methods based on experience and needs. Currently, the final assembly production line layout can only be obtained through public promotional materials, but its analysis method and construction process are unknown. There are no unified relevant technical requirements and standard methods for the design of assembly process solutions for pulsating final assembly production lines for large aircraft at home and abroad. The overall efficiency of the basic methods of aircraft assembly is not high. This is mainly because the aircraft final assembly production lines of the existing technology cannot reasonably plan the final assembly process. Therefore, it is impossible to shorten the assembly cycle as much as possible through efficient organization while ensuring the high quality of the aircraft, resulting in long assembly time and great difficulty. In response to the shortcomings of the existing technology, the present invention provides an aircraft pulsating final assembly production line assembly process method to solve the above problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an assembly process method for an aircraft pulse-type final assembly production line, which plans the entire process from task determination to production line implementation verification in detail and systematically. By rationally planning the assembly process flow and resource allocation of the final assembly production line, the assembly cycle is shortened, the aircraft final assembly efficiency is improved, and the dual improvement of production efficiency and product quality is ensured.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an assembly process method for an aircraft pulse assembly production line, comprising:

[0006] Step S10: Determine the assembly tasks and required output of the aircraft final assembly production line;

[0007] Step S20: Planning the layout and process of the aircraft pulse production line;

[0008] Step S30: Reasonably divide the system assembly process separation surface in each station;

[0009] Step S40: Detailed assembly process design for each station;

[0010] Step S50: Calculate the assembly cycle of each station;

[0011] Step S60: Establishing an aircraft pulse assembly production line;

[0012] Step S70: Implement verification and improvement of the aircraft pulse assembly production line.

[0013] Preferably, step S10: determining the assembly tasks and required output of the aircraft assembly production line

[0014] Design configuration EBOM: Based on the engineering BOM, the aircraft design configuration is clarified, including the detailed configuration of each component and system.

[0015] Qualified Supplier Directory: Ensures that all suppliers of parts and systems meet company standards to ensure the stability and quality of the supply chain.

[0016] Principle of manufacturing division of labor: Based on manufacturing capabilities and technical expertise, reasonably allocate tasks in each manufacturing link to form a process PBOM.

[0017] Market demand: Combined with market forecasts and order status, determine the production capacity requirements of the production line, providing a basis for setting the number of stations and beat rate.

[0018] Step S20: Plan the layout and process of the aircraft pulse production line

[0019] Main manufacturer-supplier model: drawing on advanced international experience, clarifying the collaborative relationship between the main manufacturer and the supplier.

[0020] Basic serial stations: Set up four key stations for component preparation, large component docking, system assembly, and system debugging to ensure a smooth production process.

[0021] Parallel preparation stations: During the component preparation stage, the fuselage, wings, tail and other components are prepared in parallel to improve production efficiency.

[0022] Step S30: Reasonably divide the system assembly process separation surface in each station

[0023] Structural separation surface: Based on the aircraft structure design, the assembly area is reasonably divided to ensure the independence and parallelism of assembly work.

[0024] Correspondence between system layout and assembly areas: Clarify the system installation work that needs to be completed in each assembly area and establish a clear correspondence.

[0025] Assembly unit planning: Further refine the assembly units within the assembly area to form a top-level MBOM for easy management and control.

[0026] Step S40: Detailed assembly process design for each station

[0027] Sorting out serial and parallel relationships: clarify the logical relationship between each assembly unit to ensure the continuity and efficiency of the process.

[0028] Assembly instruction planning: Plan assembly instructions in detail in the GACE system and draw logical relationship diagrams to ensure clear guidance for each step of the operation.

[0029] Step S50: Calculate the assembly cycle of each station

[0030] Man-hour estimation: Estimate the man-hours for each assembly instruction based on the complexity of the assembly instruction and the capabilities of the construction workers.

[0031] Cycle calculation: Combined with the serial and parallel relationship of assembly instructions, the construction cycle of assembly units, assembly areas and stations is calculated step by step to ensure the accuracy of production plans.

[0032] Step S60: Establishing an aircraft pulse assembly production line

[0033] Simulate assembly status: Through simulation, potential problems can be discovered in advance and production line layout and process flow can be optimized.

[0034] Infrastructure support: According to production needs, necessary working platforms, process equipment, tools and other infrastructure are configured.

[0035] Personnel training: Organize professional training for production line personnel to ensure that they are familiar with new equipment, new processes and new procedures.

[0036] Step S70: Implementation verification and improvement of aircraft pulse assembly production line

[0037] Actual cycle record: During the production process, the actual construction cycle of each assembly unit, assembly area and station is recorded in detail.

[0038] Missing parts and fault handling: Statistics on major missing parts items and fault handling cycles, analyze causes and take measures to improve them.

[0039] Process optimization: Based on actual production data, continuously optimize the station assembly process to improve production efficiency and product quality.

[0040] When calculating the station beat of a pulsating production line, the station beat M is calculated based on the annual working days D and the annual order volume O. The calculation formula is as follows:

[0041]

[0042] The station cycle time is the average number of working days required to deliver an aircraft on the final assembly line.

[0043] When calculating the number of stations on a pulsating production line, the number of stations N is calculated based on the single-frame machine assembly cycle T and the station beat M. The calculation formula is as follows:

[0044]

[0045] The number of stations N is calculated based on the single-frame assembly cycle T and the station beat, and the rounding up function is used to ensure that the number of stations is an integer.

[0046] The present invention discloses an assembly process method for an aircraft pulse assembly production line, which has the following beneficial effects:

[0047] 1. This aircraft pulsating final assembly line assembly process method systematically plans the final assembly process, comprehensively considering the interplay of each link, from aircraft configuration management to production management, to ensure the coordination and efficiency of the entire assembly process. Through a reasonable station layout and the application of a pulsating production line, this method can significantly shorten the assembly cycle. The pulsating production line allows aircraft assembly to be performed simultaneously at different stations, enabling parallel operations and significantly improving assembly efficiency. This method can flexibly adjust the production rhythm and station migration speed based on production demand and capacity changes, making the production line highly flexible and adaptable, capable of meeting the production needs of different aircraft models and batches.

[0048] 2. This aircraft pulse assembly line assembly process method scientifically and rationally allocates and schedules assembly resources, including personnel, equipment, and materials, ensuring efficient resource utilization and minimizing waste. Simultaneously, through simulation optimization and other methods, the efficiency and accuracy of resource allocation can be further improved. While ensuring assembly efficiency, this method also focuses on improving assembly quality. Through strict process control and quality management measures, every step of the aircraft assembly process ensures that it meets design requirements and quality standards.

[0049] 3. This aircraft pulse assembly line assembly process method is dedicated to promoting the development and implementation of relevant standards. By summarizing practical experience and identifying common principles, it provides the industry with a standardized and standardized design solution. Through detailed early planning and simulation analysis, this method can proactively identify and resolve potential production risks and issues, thereby reducing risks and costs during actual production. Furthermore, the optimized assembly process and production line layout also help reduce material and energy consumption, achieving green production. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0051] Figure 1 Design a flow chart for the overall solution of the present invention;

[0052] Figure 2 This is the layout diagram of the pulsating production line of the present invention

[0053] Figure 3 This is a schematic diagram of the wing assembly area division of the present invention;

[0054] Figure 4 The fuselage system layout matrix diagram of the present invention is as follows;

[0055] Figure 5 This is a diagram of the fuselage system assembly unit in the present invention;

[0056] Figure 6 This is a flow chart of the lubricating oil system assembly process of the present invention;

[0057] Figure 7 This is a flow chart of the assembly process in the nacelle assembly area of ​​the present invention. DETAILED DESCRIPTION

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0059] The embodiments of the present application provide an assembly process method for an aircraft pulsating final assembly production line, thereby resolving the problem that existing domestic and foreign large-scale aircraft final assembly pulsating production line assembly process scheme designs lack unified relevant technical requirements and standard methods, and the overall efficiency of the basic methods of aircraft assembly is low. This is mainly because the aircraft final assembly production line in the existing technology cannot reasonably plan the final assembly process, and therefore cannot shorten the assembly cycle as much as possible through efficient organization while ensuring the high quality of the aircraft, resulting in a long assembly time and great difficulty.

[0060] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0061] The embodiment of the present invention provides a method for designing a large aircraft final assembly pulsating production line assembly process scheme. Figure 1-7 As shown, including:

[0062] Determine the assembly tasks and required output of the aircraft final assembly production line, plan the station layout and process of the aircraft pulsating production line, reasonably divide the system assembly process separation surface within each station, design the detailed assembly process flow within each station, calculate the assembly cycle of each station, establish the aircraft pulsating final assembly production line, and implement verification and improvement of the aircraft pulsating assembly production line.

[0063] Optionally, in the construction of the assembly process design method for the large aircraft final assembly pulsating production line as described above, the method specifically includes:

[0064] Step 10: Based on the route division of labor and model market analysis report, determine the assembly tasks and required output of the aircraft final assembly production line, and calculate the station beat and single-machine production cycle of the final assembly pulse production line;

[0065] Step 20: Plan the station layout and process for the aircraft pulse production line, including surveying the final assembly line site and other infrastructure, allocating assembly content to each station, the logical sequence between stations, and proposing the final assembly line infrastructure and process equipment requirements;

[0066] Step 30: Rationally divide the system assembly process separation surface within each station, including: dividing the station assembly area, planning the system assembly units within the assembly area, and building the top MBOM of the final assembly line;

[0067] Step 40: Design the detailed assembly process flow for each station, including: drawing a system assembly unit-level process flow chart, a station assembly unit-level process flow chart, planning the assembly instruction catalog for the assembly unit, drawing the assembly instruction-level flow chart for the assembly unit, compiling the assembly instructions, and forming the final assembly production MBOM.

[0068] Step 50, calculating the assembly cycle of each station, including: calculating the assembly instruction working hours, preliminarily determining the assembly instruction construction cycle, calculating the construction cycle of the assembly unit according to the sequence of the assembly instructions, and further calculating the station assembly cycle according to the assembly unit level process flow;

[0069] Step 60: Establishing a pulse-type aircraft assembly line, including completing technical transformation of aircraft production line stations, skilled personnel training, supply chain support, and environmental improvements;

[0070] Step 70: Implement verification and improvement of the aircraft pulse assembly production line, including: carrying out large component docking, system assembly, system debugging, verifying the final assembly production process flow, recording the assembly unit and station construction cycle, and continuous improvement.

[0071] Optionally, in the above-mentioned method for designing an assembly process scheme for a large aircraft final assembly pulsating production line, step 30 includes:

[0072] Step 31: Based on the aircraft structure digital model, the system / structure assembly content within the station is divided into zones to fully open up the parallel operation surface;

[0073] Step 32: Check the system layout in each assembly area and the system design separation surface according to the ATA chapter. Set up one or more assembly units in the assembly area, try to keep the design separation surface and process separation surface consistent, and re-divide the separation surface through coordinated design.

[0074] Step 33: Summarize the station assembly units to form a list of assembly units for each station of the final assembly line, which is published as the top-level MBOM.

[0075] Optionally, in the above-mentioned method for designing an assembly process scheme for a large aircraft final assembly pulsating production line, step 40 includes:

[0076] Step 41: The responsible process organizes the system / subsystem assembly units and draws a system-level assembly process flow chart;

[0077] In step 42, the station engineer sorts out the list of assembly units in the station assembly area and draws a process flow chart of the station assembly unit level according to the assembly sequence of first inside and then outside.

[0078] In step 43, the responsible process establishes a corresponding relationship between the assembly unit CA and the assembly configuration item DS, verifies the work content of the assembly unit CA, and avoids a complex situation where CA and DS have many-to-many relationships.

[0079] Step 44 , the person in charge of process planning the assembly instruction AO directory in the assembly unit, draws the AO assembly logic relationship diagram, and confirms that the sequence of assembly instructions under different assembly units conforms to the logical sequence between CAs.

[0080] Furthermore, step S10 determines the assembly tasks and required output of the aircraft assembly line, including:

[0081] Based on the process PBOM formed by the design configuration EBOM, the company's qualified supplier catalog, and the manufacturing division of labor principles, the route division is sorted out into the BOM list of the final assembly production line and the technical conditions for installation and inspection of each system, and the assembly task volume of the final assembly production line is determined; combined with the market demand and annual order volume of aircraft products given by the marketing department, and taking into account factors such as the company's production line site, the number of stations and beats of the pulsating production line are calculated.

[0082] Optionally, the calculation of the number of stations and beat of the pulsating production line in step S10 includes:

[0083] The following formula can be used:

[0084] When calculating the station beat of a pulsating production line, the station beat M is calculated based on the annual working days D and the annual order volume O. The calculation formula is as follows:

[0085]

[0086] The station cycle time is the average number of working days required to deliver an aircraft on the final assembly line.

[0087] When calculating the number of stations on a pulsating production line, the number of stations N is calculated based on the single-frame machine assembly cycle T and the station beat M. The calculation formula is as follows:

[0088]

[0089] The number of stations N is calculated based on the single-frame assembly cycle T and the station beat, and the rounding up function is used to ensure that the number of stations is an integer.

[0090] A certain factory produces five large aircraft annually, with a station-balanced cycle of 50 working days; the final assembly cycle is 180 days, requiring four serial stations to ensure the annual delivery target.

[0091] Step S20, planning the station layout and process of the aircraft pulse production line, including:

[0092] According to the domestic and foreign large aircraft manufacturing main manufacturer-supplier model, the general aircraft assembly production line has four basic serial stations, namely the large component docking station, the system assembly station, the system debugging station, and the delivery station. In addition, the fuselage component preparation station, the wing component preparation station, and the tail component preparation station can be set in parallel at the component preparation station.

[0093] Optional, component preparation station, including:

[0094] The fuselage components are generally divided into the nose, mid-fuselage, mid-rear fuselage, and rear fuselage. After the components are delivered to the final assembly line, they need to be pre-installed with system brackets, completed with supplier reservations, and painted.

[0095] Wing component preparation station. Wing components are generally divided into left wing, right wing, wing leading edge, trailing edge, wingtip, flaps, ailerons, spoilers, engine nacelles, etc. After the wing components are delivered to the final assembly line, the left and right wings need to be docked, the leading and trailing edges, spoilers, wingtips, flaps, ailerons, engine nacelle structure parts, nacelle, wing leading and trailing edge system brackets, fuel tank internal piping and finished products need to be installed;

[0096] The tail components are prepared and positioned. The tail components are generally divided into horizontal stabilizer, vertical stabilizer, elevator, rudder, dorsal fin, etc. After the components are delivered to the final assembly line, the system components in the leading and trailing edges of the horizontal and vertical stabilizers need to be installed, the horizontal and vertical stabilizers need to be docked, and the movable rudder surfaces need to be installed;

[0097] Optional large component docking station, including:

[0098] The main function of the large component docking station is to complete the docking of various fuselage sections to form the entire fuselage section, complete the cross docking of the wing section and the fuselage section, complete the docking of the tail and the fuselage, and install the landing gear, front and rear wing-body fairings, and landing gear fairings on the aircraft.

[0099] Optional system assembly station, including:

[0100] The system assembly station is mainly responsible for completing the installation of pipelines and finished products of the power environmental control and hydraulic flight control systems, the installation of wiring harnesses and finished products of the avionics and electrical systems, etc., and completing air tightness inspections of environmental control pipelines, fuel tanks, etc., cleaning and pressure resistance of the hydraulic system, and wiring harness conductivity and insulation.

[0101] Optional system debugging station, including:

[0102] The system debugging station is mainly responsible for completing the comprehensive debugging of the avionics and electrical systems, cross-linking testing of the electromechanical systems, and system functional performance inspections.

[0103] Step S30, rationally dividing the system assembly process separation plane within the station, including:

[0104] Refer to the aircraft structure separation surface to divide the system assembly area; according to the definition of assembly area and system layout, determine the system installation work involved in each assembly area, and establish a corresponding matrix between system layout and assembly area; plan system assembly units in each assembly area and build the top-level MBOM of aircraft assembly; sort out the logical relationship between each system assembly unit and draw the assembly process flow chart of system assembly unit level.

[0105] Optionally, refer to the aircraft structure separation surface to divide the system assembly area, including:

[0106] In order to fully open the assembly work surface of the station, it is necessary to divide the assembly work within the station into areas. The first-level area can be divided into fuselage, wings, tail, nacelle, and fairing, and then continue to divide the second-level areas. For example, the fuselage can be divided into sections, floors up and down, and left and right, and the equipment cabinets can be divided separately; the wings can be divided into left and right wings, and the left wing can be further divided into second-level areas such as the wing leading edge, trailing edge, No. 1 fuel tank, No. 2 fuel tank, etc.

[0107] After the system assembly area is divided, the system installation work involved in each secondary assembly area is determined according to the structure and system configuration layout definition, and a corresponding matrix table between the system layout and the assembly area is established.

[0108] Check the digital models of each system one by one according to the installation area, analyze and determine whether the system has a designed separation surface on the divided area separation surface, whether the process separation can be performed, and check the workload of the system in the structural division area to define the assembly unit setting of the system in the divided area;

[0109] Step S40: Detailed process flow design for each station, including:

[0110] Sort out the serial and parallel relationships of the assembly units under each assembly area within the station, and draw the assembly process flow chart at the assembly unit level within the station; build an assembly unit tree in the GACE system process design module, and the process personnel plan the assembly instructions within the assembly unit, and draw the assembly instruction level logical relationship diagram in the system AOL to complete the process flow design of the entire station.

[0111] Optional, detailed process flow design for each station, including:

[0112] The process manager sorts out the assembly units of the system in each station according to the system assembly logic, and draws the system assembly unit-level logical relationship diagram of the final assembly production line based on the system assembly logic; the station management engineer sorts out the assembly units in each assembly area of ​​the station, and plans the system installation process flow in each assembly area according to the principles of inside first, outside later, bottom first, and top later, and draws the assembly process flow chart of the entire station.

[0113] The responsible process creates assembly solutions under the system assembly units according to the process separation surfaces, defined assembly units, and process quotas PBOM divided by the system, plans the assembly instruction catalog and defines the process quotas under CA, sorts out the assembly instruction-level process flow chart, and compiles assembly instructions.

[0114] Step S50, calculating the assembly cycle of each station, includes:

[0115] Process personnel calculate the working hours for a single assembly instruction, estimate the manual cycle of the instruction based on the situation of the construction personnel, calculate the construction cycle of the assembly unit according to the serial and parallel relationship of the assembly instructions in the assembly unit, calculate the construction cycle within the assembly area considering the assembly unit-level process logic within the assembly area, compare the construction cycle and logical relationship of each area, and calculate the station construction cycle.

[0116] Optionally, calculate the assembly cycle of each station, including:

[0117] The following elements should be clarified when calculating the system's overall assembly cycle: 1. Earliest start time, which refers to the most likely start time for this work after all predecessor work is completed; 2. Earliest completion time, which refers to the earliest possible time when this work may be completed after all predecessor work is completed; 3. Latest completion time, which refers to the latest completion time for this work without affecting the entire station planning cycle; 4. Latest start time, which refers to the latest start time for this work without affecting the entire planning cycle; 5. Free time difference, which refers to the maneuvering time available for this work without affecting the earliest start of subsequent work; 6. Total time difference, which refers to the maneuvering time available for this work without affecting the planning cycle.

[0118] By calculating time parameters, the station network plan is adjusted and optimized, selecting the optimal solution from multiple feasible options and calculating the production cycle for all possible assembly processes. The route with the longest cycle is the critical route, which helps determine key tasks, critical routes, and assembly cycles. The entire station cycle can then be adjusted based on production cycle requirements by adding equipment and personnel.

[0119] Evaluate the assembly workload and staffing situation of each system in each divided area, determine the preliminary work cycle, and form a station assembly network plan.

[0120] Step S60, establishing an aircraft pulse assembly production line, including:

[0121] During the detailed process design of stations and systems, the station assembly working status is simulated, and the supporting requirements of the station work platform, system assembly process equipment, tools, cutting tools and other infrastructure are proposed. The production line transformation is carried out, assembly completion personnel training is carried out, and supply chain support is organized as planned.

[0122] Step S70, aircraft pulse assembly production line, including:

[0123] During the detailed process design of stations and systems, the station assembly working status is simulated, and the supporting requirements of the station work platform, system assembly process equipment, tools, cutting tools and other infrastructure are proposed. The production line transformation is carried out, assembly completion personnel training is carried out, and supply chain support is organized as planned.

[0124] Optional, aircraft pulse assembly line implementation verification, including:

[0125] Controlling the assembly implementation process is a dynamic process. During actual production, planned process flows and assembly plans must be optimized based on production support, organizational models, and on-site issues. When assembly nodes fail to meet planned requirements, key tasks in critical processes must be compressed to meet cycle times. This can be achieved by exploring new processes and methods, increasing resource allocation, and refining production organizational models to achieve an isochronous flow operation model.

[0126] The method provided by the present invention can shorten the assembly cycle and improve the aircraft assembly efficiency by rationally planning the assembly process and resource allocation of the final assembly production line.

[0127] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0128] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembly process method for an aircraft pulse assembly production line, characterized in that: include: Step S10: Determine the assembly tasks and required output of the aircraft final assembly production line; Step S20: Planning the layout and process of the aircraft pulse production line; Step S30: Reasonably divide the system assembly process separation surface in each station; Step 30 includes: Step 31: Based on the aircraft structure digital model, the system / structure assembly content within the station is divided into zones to fully open up the parallel operation surface; Step 32: Check the layout of the system in each assembly area and the system design separation surface according to the ATA chapter, set up one or more assembly units in the assembly area, keep the design separation surface and the process separation surface consistent, and re-divide the separation surface through coordinated design; Step 33: Summarize the station assembly units to form a list of assembly units for each station of the final assembly line, and publish it as the top-level MBOM. Step S40: Design the assembly process flow for each station; Step 40 includes: Step 41: The responsible process organizes the system and subsystem assembly units and draws a system-level assembly process flow chart; Step 42: The station engineer sorts out the list of assembly units in the station assembly area and draws a station assembly unit-level process flow chart in the order of internal assembly first and external assembly later. Step 43: The responsible process establishes a correspondence between the assembly unit CA and the assembly configuration item DS, verifies the work content of the assembly unit CA, and avoids a complex situation where there is a many-to-many relationship between CA and DS. Step 44, the process manager plans the assembly instruction AO directory within the assembly unit, draws the AO assembly logic relationship diagram, and confirms that the sequence of assembly instructions under different assembly units conforms to the logical sequence between CAs; Step S50: Calculate the assembly cycle of each station; Step S60: Establishing an aircraft pulse assembly production line; Step S70: Implement verification and improvement of the aircraft pulse assembly production line.

2. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S10, a process PBOM is generated based on the design configuration EBOM, the company's qualified supplier catalog, and the manufacturing division of labor principle. The route division of labor is sorted out into the BOM list of the final assembly line and the technical conditions for installation and inspection of each system, and the assembly task volume of the final assembly line is determined; The number of stations and beats of the pulsating production line are calculated based on the market demand for aircraft products, annual order volume and the company's production line site factors given by the marketing department.

3. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S20, according to the domestic and foreign large aircraft manufacturing main manufacturer-supplier model, four basic serial stations are set up on the aircraft assembly production line, namely, component preparation station, large component docking station, system assembly station, and system debugging station. In addition, the fuselage component preparation station, wing component preparation station, and tail component preparation station are set up in parallel at the component preparation station.

4. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S30, the system assembly areas are divided with reference to the aircraft structure separation surface. Based on the assembly area and system layout definitions, the system installation work involved in each assembly area is determined, and a corresponding matrix between the system layout and the assembly area is established. System assembly units are planned in each assembly area, and the top-level MBOM of the aircraft assembly is constructed. The logical relationships between the system assembly units are sorted out, and a system assembly unit-level assembly process flow chart is drawn.

5. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S40, a detailed process flow design is carried out within each station, the serial and parallel relationships of the assembly units under each assembly area within the station are sorted out, and an assembly process flow chart at the assembly unit level within the station is drawn; an assembly unit tree is built in the process design module of the GACE system, and process personnel plan the assembly instructions within the assembly unit, and draw an assembly instruction-level logical relationship diagram in the system AOL to complete the process flow design of the entire station.

6. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S50, the process personnel calculate the working hours of a single assembly instruction, estimate the manual cycle of the instruction based on the situation of the construction personnel, calculate the construction cycle of the assembly unit according to the serial and parallel relationship of the assembly instructions in the assembly unit, calculate the construction cycle in the assembly area according to the assembly unit-level process logic in the assembly area, compare the construction cycle and logical relationship of each area, and calculate the station construction cycle.

7. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S60, during the detailed process design of the station and system, the station assembly working status is simulated, the station work platform, system assembly process equipment, tools and other infrastructure supporting requirements are proposed, the production line transformation is carried out, the assembly completion personnel training is carried out, and the supply chain support is organized as planned.

8. The assembly process method of an aircraft pulse assembly line according to claim 1, characterized in that: In step S70, during the aircraft assembly process, the actual construction period, major missing parts items, and fault handling period of each assembly unit and assembly area are recorded, the actual construction period of the aircraft assembly station is counted, and the assembly process flow of the station is analyzed and improved.

9. The assembly process method of an aircraft pulse assembly line according to claim 2, characterized in that: When calculating the station beat of a pulsating production line, the station beat M is calculated based on the annual working days D and the annual order volume O. The calculation formula is as follows: The station cycle time is the average number of working days required to deliver an aircraft on the final assembly line.

10. The assembly process method of an aircraft pulse assembly line according to claim 9, characterized in that: When calculating the number of stations on a pulsating production line, the number of stations N is calculated based on the single-frame machine assembly cycle T and the station beat M. The calculation formula is as follows: The number of stations N is calculated based on the single-frame assembly cycle T and the station beat, and the rounding up function is used to ensure that the number of stations is an integer.

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