Technological process reconstruction method for flexible operation mode of general assembly workshop

Abstract

The invention relates to a general assembly workshop production process flow reconfigurable technological process reconstruction method, and solves the problem that a general assembly production process workshop flexible reconfigurable design scheme neglects a specific process execution process flexible design. And the problem that the production execution rationalized process reconstruction response cannot be realized by relying on the existing resources of the flexible reconfigurable production workshop is solved. Detailed investigation and analysis are carried out according to the process execution design of the general assembly workshop, modular design is carried out on the product process, and production management and control of a digital management and control platform are imported; the method comprises the following steps: dividing logic relationships among different modules based on a general assembly process modular design scheme, and establishing a process knowledge base platform; and according to the three-dimensional design model of the product, the final assembly production sequence of the product is designed, a process execution level, a material matching scheme, an equipment tool scheme, personnel configuration and the like are divided according to the sequence relation in the final assembly production sequence, and a basic assembly process scheme matched with production conditions is formed. The method is efficient and stable, and the flexible management and control level of a workshop in the final assembly production process is improved.

Description

Technical Field

[0001] The present invention relates to the field of digital control of an assembly workshop, and in particular to a process flow reengineering method for a flexible operation mode of an assembly workshop. Background Art

[0002] The production of complex equipment assembly (including aircraft, satellites, missiles, etc.) is the last link in the manufacturing process, involving a large number of key processes and occupying an important position in the production process. At present, large-scale assembly operations are gradually building automated flexible production lines, transforming from manual operation production mode to automated assembly mode. This is an important means to ensure product quality consistency and improve product assembly efficiency, and provide strong guarantees for the rationalization of the technical process of large-scale complex product assembly. According to the current planning and design scheme of the assembly production line, the assembly intelligent manufacturing system is the key and foundation of production operation, advanced digital assembly technology is the key link to ensure assembly production, and logistics system design optimization is a powerful supplement to the production system. Among them, the failure of production scheduling caused by material resource shortages and assembly unit failures in the production process will disrupt the production rhythm and affect the progress of assembly. In view of this, it is of great significance to build a flexible and reconfigurable operation and maintenance solution for the assembly production line to realize the process reengineering control of the production execution link under different production resource configurations to ensure stable and orderly production.

[0003] In this regard, domestic and foreign experts and scholars have conducted in-depth research from different aspects such as production process scheduling, logistics control design, assembly design and operation and maintenance, providing strong support for the optimization of the business process of the final assembly production process. However, at present, the control process of the complex final assembly production process of large-scale equipment ignores the research on process design and execution methods in flexible control solutions, resulting in poor compatibility between process plans and production plans, logistics solutions, assembly unit operation and maintenance, etc. in the final assembly production process of complex products, which increases the difficulty of smooth execution of the business process of the flexible life control process of workshop production. Summary of the invention

[0004] The present invention proposes a method suitable for process reengineering of flexible production lines, and studies the process reconstruction design under different conditions of process modularization and production line operation process. It solves the problem that the flexible reconfigurable design scheme of the process workshop of the existing final assembly production ignores the flexible design of the specific process execution process, and there is no way to rely on the existing resources of the flexible reconfigurable production workshop to achieve the production execution rationalization process reengineering response.

[0005] The present invention is achieved through the following technical solutions:

[0006] A process reengineering method for a flexible operation mode of an assembly workshop comprises the following steps:

[0007] Step 1: According to the production schedule and real-time production data issued by the general assembly production management system, obtain the general assembly production information that can be produced, and determine whether the production requirements are met according to the system execution plan. If so, continue to complete the process design according to the current service execution mode. If not, it is necessary to determine the type of process reengineering to be completed;

[0008] Step 2: If it is determined that the production process cannot be executed due to insufficient production materials, it is necessary to determine whether the resource replacement plan can be implemented according to the workshop material preparation situation, and determine whether the production evaluation factors under the replacement conditions meet the requirements. If so, continue to execute the current process reengineering plan and output a flexible execution plan for workshop production. Otherwise, execute the process reconstruction content;

[0009] Step 3: According to the process reconstruction content execution method, determine whether the production evaluation factors after the current production process adjustment and reengineering meet the requirements. If they do, generate a new process execution plan according to the process reconstruction method and output a flexible execution plan for workshop production; otherwise, execute the product reconstruction plan;

[0010] Step 4: Generate a new process execution method according to the product reconstruction plan, which includes two parts. First, when there is an urgent production task, it is necessary to temporarily adjust the product production process, then directly skip the contents of steps 2 and 3, and directly execute the plan to produce another product; second, in step 3, it is determined that the process execution does not meet the current product production execution requirements, and switch to the production mode of another product in the production schedule. By executing the above steps, the product switching mode will be completed under the current production conditions, a new product process reengineering plan will be formed, and the corresponding workshop production execution plan will be output.

[0011] On the other hand, the generation of process execution plans and production evaluation factors (time, quality, etc.) require the call of the digital management platform assembly process module, judgment and recognition model, and knowledge storage logic. The process knowledge base construction scheme in the present invention includes:

[0012] Assembly basic scheme, process design model, assembly process information modularization, process knowledge base and data knowledge platform, etc.

[0013] The basic assembly plan is to design the product assembly production sequence according to the product three-dimensional design model, and divide the sequence relationship into process execution levels, material set plans, equipment and tooling plans, and personnel configuration, so as to generate a basic assembly process plan that matches the production; the process execution levels are divided according to the assembly sequence, including parallel relationships that can be executed simultaneously, series relationships that are executed sequentially, and cross relationships where multiple processes are executed in an interspersed manner; the material set means that the requirements for parts, standard parts, finished parts, and auxiliary materials under a certain level of assembly work are complete, which can support the completion of all material preparations for the current work.

[0014] The process design model refers to the further planning and analysis of the basic assembly plan by integrating multiple aspects such as production process attributes, resource attributes and production management attributes, and formulating a process design model with implementation conditions. The production process attributes include the operation methods required for the current final assembly production process, including different methods such as automation, semi-automation, and manual operation, as well as the process execution skills and standards of the corresponding methods. The resource attributes include whether the tooling equipment is complete, whether the workshop personnel are in order, whether the testing equipment is available, and other resource conditions necessary for the final assembly production process that need to be considered in the current process model to support the feasibility of the process design model. The production management attributes refer to the completion of the upstream production scheduling plan for the current work process, including execution according to the current assembly, lack of production conditions, and temporary changes, and include workshop-level production scheduling changes.

[0015] The modularization of assembly process information refers to refining the process execution plan according to the current process design model, and combining and packaging it according to the execution process to form a process information module for workshop production conditions, and storing it in a certain logical form in the knowledge base to provide a basis for the reengineering design of the production process.

[0016] The process knowledge base construction refers to constructing the process information module according to the process execution logic, dividing the logical relationship between different modules, including parallel modules, serial modules, etc., and establishing a process knowledge base platform.

[0017] The data knowledge platform includes a process knowledge base and a production line database, etc., which is the most important content for implementing the production process process reengineering method.

[0018] The present invention can realize the process flow reengineering of the final assembly production process of complex products and provide a solution for the efficient and stable operation of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flow chart of a method for reengineering the process flow of a general assembly workshop provided by the present invention is provided to provide a reference for illustrating the embodiments of the present invention;

[0020] Figure 2 It is a solution for building a judgment data and process model library in the method for executing the process reengineering of the final assembly workshop in the present invention, and is the core construction content of the execution process of the present invention. DETAILED DESCRIPTION

[0021] Example:

[0022] like Figure 1 , 2As shown, this embodiment proposes a method for re-planning the process design scheme in the final assembly production process of complex products to complete the final assembly process reengineering. According to the common process scheme change problems in the final assembly production process, the following is drawn: Figure 1 Flowchart shown. In this process, this embodiment is for products A and B that can be produced on the same flexible production line, and when product A does not meet the production conditions, product B must meet the product switching production conditions. This embodiment is described as above for ordinary technicians in this field. This embodiment can be used as a process reengineering solution for more products, and does not specify the relevant processes of only 2 products. At the same time, the judgment criteria in the flowchart of this embodiment only use the time factor as a reference for determining the feasibility of the process reengineering process, and does not represent all feasibility judgment factors.

[0023] In this embodiment, it is necessary to complete the construction of the "data knowledge platform" for product A and product B in advance. It is mainly based on the three-dimensional design models of product A and product B to design the assembly production process plans of the two products, and divide the sequential relationship therein into process execution levels, material set plans, equipment tooling plans, and personnel configurations, etc., to generate a basic assembly process plan that matches the production.

[0024] Specific implementation steps:

[0025] Step 1: The production control system issues production tasks and production management data, and through analysis and comparison on the data knowledge platform, determines whether the current production meets the conditions for producing product A in the original production plan. If so, execute the current production process plan according to the original plan; if not, it is necessary to further determine the type of reconstruction plan that needs to be regenerated.

[0026] Step 2: Based on the conditions of resources and production factors, if the production of the current product A cannot be met, it is necessary to directly execute the product reconstruction plan and execute it according to the plan for producing product B. Call the relevant logic and modular plan for producing product B in the data knowledge platform to directly complete the process reconstruction plan for product B, and generate a process execution plan changed to product B in the system. According to the planned output, the production plan that needs to be executed is completed to complete the current product's final assembly production process reengineering process.

[0027] Step 3: According to the plan provided by the data management platform, determine the feasibility of executing the material reconstruction plan. That is, when there are spare resources in the workshop, according to the current production plan of product A, determine whether calling the spare resources to execute the current production meets the requirement of less than the time threshold. If so, directly call the spare resources according to the material reconstruction plan to continue the implementation process of producing product A, generate a new process execution plan, and output the corresponding production execution plan.

[0028] Step 4: If the time required to call the resource production plan is greater than the time threshold requirement, it is necessary to consider implementing a process reconstruction plan for producing product A, that is, calling the data knowledge platform to produce the process logic relationship of product A, determine the feasibility of directly skipping the current production process module steps, and produce the production execution plan after product A executes the current step, and determine whether it meets the requirement of being less than the time threshold. If so, continue to generate a process execution plan according to the plan reconstructed according to the product A process plan, and output the production plan that needs to be executed according to the product A process reconstruction method.

[0029] Step 5: If after executing the process reconstruction plan for product A, the time required for production execution is greater than the time threshold requirement, it is necessary to consider implementing the product reconstruction plan for producing product B, that is, switch to the product reconstruction plan for producing product B, and execute the production process reengineering steps according to the product reconstruction steps in step 2.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1) Provide a process reengineering method for reconfigurable production process flow in an assembly workshop;

[0032] 2) Innovatively conduct detailed research and analysis on the process execution design of the general transfer workshop, modularize the product process, and introduce the production control ideas of the digital control platform.

[0033] 3) Propose a modular design scheme for the final assembly process, divide the logical relationships between different modules, and establish a process knowledge base platform;

[0034] 4) It is proposed to design the product assembly production sequence according to the product 3D design model, and divide the sequence relationship into process execution levels, material set solutions, equipment tooling solutions and personnel configuration, so as to form a basic assembly process solution that matches the production conditions;

[0035] 5) Improve the flexible control level of the final assembly production process workshop;

[0036] 6) It can realize the process reengineering of complex product assembly production process and provide solutions for efficient and stable operation of production lines.

Claims

1. A process reengineering method for a flexible operation mode of an assembly workshop, characterized by: The following steps are involved: Step 1: According to the production schedule and real-time production data issued by the general assembly production management system, obtain the general assembly production information that can be produced, and determine whether the production requirements are met according to the system execution plan. If so, continue to complete the process design according to the current service execution mode. If not, it is necessary to determine the type of process reengineering to be completed; Step 2: If it is determined that the production process cannot be executed due to insufficient production materials, it is necessary to determine whether the resource replacement plan can be implemented according to the workshop material preparation situation, and determine whether the production evaluation factors under the replacement conditions meet the requirements. If so, continue to execute the current process reengineering plan and output a flexible execution plan for workshop production. Otherwise, execute the process reconstruction content; Step 3: According to the process reconstruction content execution method, determine whether the production evaluation factors after the current production process adjustment and reengineering meet the requirements. If they do, generate a new process execution plan according to the process reconstruction method and output a flexible execution plan for workshop production; otherwise, execute the product reconstruction plan; Step 4: Generate a new process execution method according to the product reconstruction plan, which includes two parts. First, when there is an urgent production task, it is necessary to temporarily adjust the product production process, then directly skip the contents of steps 2 and 3, and directly execute the plan to produce another product; second, in step 3, it is determined that the process execution does not meet the current product production execution requirements, and switch to the production mode of another product in the production schedule. By executing the above steps, the product switching mode will be completed under the current production conditions, a new product process reengineering plan will be formed, and the corresponding workshop production execution plan will be output.

2. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 1 is characterized by: The generation of process execution plans and production evaluation elements require the call of the digital management platform's general assembly process module, judgment and recognition model, and knowledge storage logic, and the construction of a process knowledge base, including: basic assembly plan, process design model, assembly process information modularization, process knowledge base, and data knowledge platform.

3. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 2 is characterized by: The basic assembly plan is to design the product assembly production sequence according to the product three-dimensional design model, and divide the sequence relationship into process execution levels, material set plans, equipment and tooling plans, and personnel configuration, so as to generate a basic assembly process plan that matches the production; the process execution levels are divided according to the assembly sequence, including parallel relationships that can be executed simultaneously, series relationships that are executed sequentially, and cross relationships where multiple processes are executed in an interspersed manner; the material set means that the requirements for parts, standard parts, finished parts, and auxiliary materials under a certain level of assembly work are complete, which can support the completion of all material preparations for the current work.

4. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 2 is characterized by: The process design model refers to the further planning and analysis of the basic assembly plan by integrating multiple aspects such as production process attributes, resource attributes and production management attributes, and formulating a process design model with implementation conditions. The production process attributes include the operation methods required for the current final assembly production process, including different methods such as automation, semi-automation, and manual operation, as well as the process execution skills and standards of the corresponding methods. The resource attributes include whether the tooling equipment is complete, whether the workshop personnel are in order, whether the testing equipment is available, and other resource conditions necessary for the final assembly production process that need to be considered in the current process model to support the feasibility of the process design model. The production management attributes refer to the completion of the upstream production scheduling plan for the current work process, including execution according to the current assembly, lack of production conditions, and temporary changes, and include workshop-level production scheduling changes.

5. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 2 is characterized by: The modularization of assembly process information refers to refining the process execution plan according to the current process design model, and combining and packaging it according to the execution process to form a process information module for workshop production conditions, and storing it in a certain logical form in the knowledge base to provide a basis for the reengineering design of the production process.

6. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 2 is characterized by: The process knowledge base construction refers to constructing the process information module according to the process execution logic, dividing the logical relationship between different modules, including parallel modules, serial modules, etc., and establishing a process knowledge base platform.

7. The process reengineering method for a flexible operation mode of an assembly workshop according to claim 2 is characterized by: The data knowledge platform includes a process knowledge base and a production line database, which is the most important content for executing the production process process reengineering method.

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