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Research on the implementation strategy of PLM in Aeroengine manufacturing enterprises

the design and manufacturing of aeroengine is a very complex project, involving a large number of information systems. The introduction of PLM technology into the production of aeroengine is of great significance for improving the existing process and process and comprehensively improving the manufacturing level. Taking Liming company as an example, this paper analyzes the Countermeasures for Aeroengine manufacturing enterprises to implement PLM from the aspects of design/manufacturing collaboration, process management, workflow, standardization and integration

The application of cad/cam and other new technologies not only promotes the development of productivity, but also brings new challenges. For aero-engine enterprises with widespread computer applications, although the computer-aided technology of each unit has become more and more mature, they generally form their own system and lack effective information sharing and utilization among each other, that is, the so-called "information island" is formed. Under this background, product data management (PDM) is a new management idea and technology. PDM is a technology used to manage all product related information (including part information, configuration documents, CAD files, structure, authority information, etc.) and all product related processes (including process definition and management). On the basis of PDM, a new technology product lifecycle management (PLM) has been developed in recent years. PLM is a technology to manage the products, processes and resources involved in the whole life cycle of products from user requirements, product design, manufacturing and assembly, maintenance services to scrap recycling. If PDM is concentrated in the product design stage, PLM greatly expands the scope of PDM

I. informatization status of aero-engine enterprises

the design and manufacturing of aero-engine is a very complex project, which is jointly participated by multiple teams, fields and plants. It involves a large number of information systems, and needs to realize the interaction and cooperation between these information systems under strict process management control to support parallel and collaborative engine design and manufacturing

aeroengine products have complex parts structure, large number of parts, high machining accuracy, long design and manufacturing cycle, various process methods involved, long production line, low standardization of parts design, and more than 90% of special parts

in terms of information construction, the remarkable characteristics of aeroengine manufacturing enterprises are as follows:

(1) the software environment is not unified, and multiple platforms coexist. In the process of informatization, many domestic aero-engine enterprises have introduced and developed various cad/capp/cam/erp software systems. Taking Liming company as an example, only the CAD system has multiple versions of UG, AutoCAD, CAXA and other software

(2) separation of design and manufacturing. Domestic aero-engine enterprises design and manufacture their own systems, and use different databases respectively, which makes it difficult to guarantee the uniqueness of the data source

(3) huge amount of data. In the course of decades' development, aero-engine enterprises have produced a large amount of data. With the continuous increase of new models and the extensive use of computers, the amount of data will increase exponentially

(4) low degree of standardization and generalization. Taking Liming company as an example, there are more than 200 kinds of process forms alone, which brings a lot of inconvenience to the work of process personnel

II. Significance and importance of implementing PLM in aero-engine manufacturing enterprises

the significance and importance of implementing PLM in aero-engine manufacturing enterprises are mainly reflected in the following aspects:

(1) improving management means. The implementation of PLM can convert the paper media drawings and technical documents distributed in various departments into digital information

(2) improve product manufacturing quality and eliminate the influence of human factors to the greatest extent. The unified PLM management mode is adopted, and the process information, manufacturing resources and product design data are established in the same database. The system can ensure the consistency and correctness of the data

(3) optimize the process and reduce the cost. The receiving and distribution of product data can save a lot of time for drawing retrieval, drawing distribution and registration, and greatly reduce the work of file managers

(4) improve work efficiency and labor productivity. Adopting collaborative design/manufacturing technology can improve the efficiency of product data distribution/reception and change; Adopting the digital manufacturing information management and the collaborative operation technology among various departments of the enterprise can improve the process design mode and the reuse mode of resources, and improve the labor productivity of employees

(5) shorten the manufacturing cycle. Compared with the serial working mode, the parallel working mode will save several times of time, and the time will be greatly saved by electronic signature and processing simulation in the system

therefore, the introduction of PLM technology into the development and production process of aero-engine is of great significance for improving the existing technology and management process, and thus comprehensively improving the overall manufacturing level of aero-engine. This paper will take Liming company as an example to study the implementation strategy of PLM

III. strategies for Aeroengine manufacturing enterprises to implement PLM

aeroengine manufacturing enterprises in the information age will be a fully integrated digital enterprise. It will not only provide users with products that meet their current needs, but also realize the management and service of the whole product life cycle (from user needs, product design, manufacturing and assembly, maintenance services to scrap recycling). It is an inevitable choice for modern aero-engine enterprises to implement PLM. The implementation of PLM is by no means achieved overnight. Effective strategies must be formulated and implemented in stages and plans. At this stage, it is still very difficult to implement the whole life management from demand analysis to scrapping. PLM, which can realize the design process, process, manufacturing and assembly process, is a leap

1. Strengthening enterprise standardization construction

standardization is the foundation of informatization. The degree of standardization of domestic aero-engine enterprises is very low, and the special parts reach more than 90% (for a good product design, the standard parts and general parts should be more than 80%, and the special parts should be less than 20%), which is very detrimental to the improvement of manufacturing process efficiency. Under such adverse conditions, strengthen standardization, Efforts should be made to do a good job in the following aspects:

(1) establish a unified coding system and adopt a unified classification and coding method in all application fields of the whole enterprise

(2) establish a digital design/manufacturing standard system, prepare standards related to the digital process according to the actual situation of the enterprise, to guide the work and standardize the process, and use standardization to drive informatization

(3) establish various basic databases, such as various standard parts libraries, industrial art language libraries, process equipment libraries, cutting machine tool libraries, process parameter libraries, etc., to realize resource sharing and reuse

(4) implement template management, establish standard templates according to enterprise standards, and optimize existing templates to reduce the number of templates and improve the degree of generalization

2. PLM is regarded as the integration framework of enterprise global information. The so-called "integration framework" is a software system that enables various applications in the enterprise to realize information integration, function integration and process integration in a heterogeneous and distributed computer environment. It is important to realize the integration of the following two aspects:

(1) integration of PLM and cad/capp/cam

at present, each department of an enterprise uses different software systems to carry out work tasks at different stages. The information flow of cad/capp/cam needs to be transferred between different software systems. This problem can be well solved by using PLM system. Manage the information related to products in a unified way, and manage the information according to different purposes. There is no need to exchange information directly among CAD, CAPP and cam. The cad/capp/cam system extracts the required information from the PLM system, and then puts the results back into the PLM system, so as to truly realize the integration of cad/capp/cam

(2) integration of PLM and ERP

plm not only transmits the required product information to ERP, but also the production, maintenance and other information related to products generated in ERP are uniformly managed by the PLM system. By integrating the two aspects of information, we can maximize the sharing of all enterprise information systems

plm system and ERP system must be very different in terms of function, information representation and technical realization if purchased. However, with the further requirements of enterprises for product information integration and process integration, PLM and ERP systems have expanded the functions of some counterpart systems. The respective expansion of PLM and ERP system functions makes many module functions superimposed, such as BOM, part classification, part information description, organization management, workflow management, etc

plm and ERP systems have many overlaps in information and functions. The integration of PLM and ERP has become a necessity to realize enterprise informatization. The two systems have many similarities in technical implementation, but they are developed for different application fields after all. They have significant differences in the types of management information and data exchange formats

at present, some main problems in PLM and ERP system integration mainly include:

1) there is no unified and complete information description between the integrated two systems, so it is difficult to fully share information. At present, many systems only realize system integration through data files, and can only share limited information

2) it is difficult to realize the process integration between the two systems. In the serial working environment, the information flow is one-way, and the information in the design and manufacturing process does not need to be exchanged and fed back. Concurrent engineering requires product developers and designers to consider all factors in the whole product life cycle from the beginning, including quality, cost, schedule and users. The implementation of PLM and ERP respectively makes the design and manufacturing process lack of necessary and timely information feedback

3) the control of information between system integrations, that is, who generates data and controls jointly owned information

4) organizational obstacles: it is difficult for departments using PLM and ERP systems to accept each other's ideas. Human factors hinder the integration between systems, which is also an aspect that cannot be ignored

the following schemes can be adopted for the integration of PLM and ERP systems

1) PLM is dominant and ERP is subordinate

2) two way information transmission between PLM and ERP systems

3) ERP is dominant and PDM is subordinate

the second mode is more suitable for Aeroengine manufacturing enterprises. BOM generation, product configuration management and document management are realized by PLM. The ERP system adds production management information and cost accounting, and releases these information to the PLM system to complete the update of product information. The integration mode of two-way transmission enables designers and manufacturers to work on their familiar information platform

3. Establishing a collaborative platform for product design/manufacturing

from product design to process planning to product manufacturing is a closely related process. The characteristic of China's aero-engine industry is that design and manufacturing are completed by different departments, and each has a different set of management methods and data environment. In order to ensure the smoothness of the process and achieve full life cycle management, it is absolutely necessary and necessary to establish a collaborative platform for product design/manufacturing

when establishing a design/manufacturing collaboration platform, the design department and the manufacturing department need to jointly negotiate to determine the product data content and data representation, and negotiate to determine each

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