Application of PDM technology in the hottest mold

2022-08-23
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Application of PDM technology in mold manufacturing (Part 1)

1. Introduction to PDM

PDM (product data management, referred to as PDM) is a technology that manages all product related information (including electronic documents, digital documents, database records, etc.) and all product related processes (including approval/distribution process, engineering change process, etc.). It is a technology that integrates the data management ability of databases Integrated engineering data management technology integrating network communication ability and process control ability

with the increasingly strong trend of international industrial structure adjustment and transfer, industrial developed countries are transferring a large number of traditional industries to developing countries, and the focus of their transfer is manufacturing. The development of China's manufacturing industry is facing a rare opportunity. To this end, the Ministry of science and technology, on the basis of the manufacturing informatization project of the original research plan, integrates the scientific and technological resources related to the 863 plan and the research plan, and organizes the implementation of the key technology research and application demonstration project of manufacturing informatization, in order to significantly improve the technological innovation ability and international competitiveness of China's manufacturing industry, realize the optimization and upgrading of the industrial structure of manufacturing industry, drive industrialization with informatization, and transform traditional industries with high and new technology, Realize the leap forward development of China's manufacturing industry

over the past 20 years of reform and opening up, China has become a large country using all kinds of molds. After unremitting efforts, the mold manufacturing industry in Shenzhen has generally changed once every six months. From the initially workshop based low-level manufacturing to the pillar industry in Shenzhen, it has become the leader of the mold manufacturing industry in the country. The state vigorously promotes the information technology of manufacturing industry, and the electric vehicle powered by this battery can travel up to 1000 kilometers, which brings new opportunities for further improving the technical level of Shenzhen mold enterprises and maintaining the leading position of Shenzhen mold in the country. This paper discusses the application of PDM technology for mold manufacturing based on the characteristics of the production mode of mold manufacturing industry and the need for informatization, which the author learned during the investigation of mold enterprises in Shenzhen (only for plastic mold enterprises, the same below)

2 main application functions of PDM system

the main application functions of PDM system include: document control, product structure and configuration management, workflow and process management, project management, information classification and retrieval, application system integration, change control, etc. it provides a large number of data tracking and storage functions required for product design, manufacturing and technical support services, and then controls the processing and use of product information, Manage the product development process

pdm can not only effectively define, organize and manage the data related to products in the whole life cycle of conceptual design, engineering analysis, detailed design, process design, manufacturing, sales, maintenance, and product scrap, so as to make the product data consistent, up-to-date, shared and safe in the whole life cycle, but also provide a unified integrated operation platform for CAx/DFX applications, which is to connect CAD/CAPP/CAM systems The bridge and link of MIS system, MRPII/ERP, workshop management and control system. Through the effective implementation and management of PDM system, it can provide designers with correct product data in time, avoid cumbersome data search, and improve design efficiency; Ensure that the detailed data of product design can be accessed in an orderly manner, improve the reuse rate of design data, and reduce repetitive work; Effectively control engineering changes, and decision-makers can easily carry out design review; It can control the product design process and provide a collaborative work environment for concurrent design; It is conducive to the system integration of the whole product development process (including suppliers, MRPII, sales, support and maintenance services, etc.)

3 characteristics and trends of production mode of mold manufacturing

3.1 characteristics of production mode of mold manufacturing

mold is a special tooling for the production of specific product parts, such as plastic mold, which is used to process plastic materials into a large number of parts with unified shape. In modern industrial production, 60% and 90% of industrial products need to use mold processing technology, and mold industry has become the basis of industrial development. Today, with the endless emergence of new products, the development and production of many products depend on mold production. According to the prediction of the international production technology association, 75% of the rough machining and 50% of the fine machining of parts in the machinery manufacturing industry in the 21st century need to be completed through molds, among which the automotive, electrical, communications, petrochemical, construction and other industries are the most prominent? 1I。 Under the premise of ensuring the mold quality, how to submit the mold to the user with the lowest cost and the shortest cycle is the main goal of the current mold industry. The characteristics and trends of the production mode of mold manufacturing industry can be summarized as follows:

(1) it is a typical single product, single sample and individual order production. Mold orders arrive at random one after another, and the number of orders changes seasonally

(2) almost every order has its particularity. In the whole process from product ordering decision to manufacturing, each set of mold has a certain degree of independence. Enterprises need to prepare corresponding production schedule for each order. Moreover, in different stages of mold development, the production schedule should be formulated and modified from coarse to fine for many times

(3) each mold must be designed creatively. Due to the particularity of different products in appearance, structure and molding process, each mold needs to be designed individually. Therefore, mold design is often divided into four stages: part process analysis and design, mold overall scheme design, overall structure design, and construction drawing design. In the process of mold development, the design takes a long time, about 1/3 of the whole development cycle

(4) mold quality management is a multi-level quality management system participated by users. When the mold quotation and the contract order are signed, the enterprise needs to negotiate with the user to determine the product drawing and relevant technical requirements; In the stages of mold structure design, detailed design and process design, enterprises need to coordinate with users; In the process of final product acceptance, enterprises also need the strong cooperation of users. 4. Data testing suddenly increases

(5) although advanced high-efficiency and high-precision machine tools and automatic production technology are adopted in modern mold production, and standard and general parts and components are fully adopted, mold cavity and core surface finishing processing (such as polishing, grinding, etc.), mold fitter and assembly still rely on the manual labor of skilled workers, and its workload will account for 25% and 45% of the total workload of the mold (calculated by working hours). Therefore, the standardization of manufacturing process becomes the technical basis for controlling the rational production of molds

3.2 development trend of manufacturing production mode in Mo County

as a high value-added technology intensive product, its technical level has become an important evaluation index to measure the level of a country's manufacturing industry. With the development of modern advanced manufacturing technology, mold manufacturing mode also shows the following development trends:

(1) as mold CAD/CAM technology has developed into a relatively mature common technology, in recent years, the price of hardware and software of mold CAD/CAM technology has been reduced to a generally acceptable level for small and medium-sized enterprises, especially the popularization and application of computers, It has created good conditions for mold enterprises to popularize mold CAD/CAM technology. Therefore, it has become inevitable for mold enterprises to apply CAD/CAM technology to mold design and manufacturing

(2) enterprises have paid more and more attention to selecting high-quality steel and corresponding surface treatment technology to improve the service life of molds

(3) manufacturers require to reduce costs and speed up product launch by reducing physical prototypes and improving product quality. This demand is particularly prominent in the mold manufacturing industry. Therefore, integrating digital analysis technology into mold CAD/CAM technology to obtain a perfect CAD/cab/CAM solution is an important development direction at present

(4) the popularization and improvement of CAD/CAM technology, as well as the development of database technology and computer network technology, have created conditions for mold enterprises to realize concurrent design and manufacturing, and become a favorable weapon for enterprises to effectively shorten the mold development cycle and reduce the mold development risk

4 the overall goal of applying PDM technology in mold manufacturing industry

the overall goal of applying PDM technology in mold manufacturing industry should include

(1) integrity and standardized management of product information

the product information managed by PDM system will involve various departments such as mold design, process, manufacturing, operation and service. The requirements of the above departments should be fully considered in the implementation of PDM system, and the necessary information sharing environment should be provided. At the same time, through the implementation of product configuration management, the consistency, uniqueness, integrity and scientificity of product information within the enterprise are realized

(2) scientific and flexible management of workflow

due to the particularity of mold enterprises receiving orders and the personalized needs of mold design and manufacturing, the workflow of mold products in the whole life cycle presents the characteristics of multi loops. Therefore, the implementation of PDM system should take into account the efficiency and convenience of change, in order to achieve process optimization and reengineering

(3) effective project management

the production management of mold enterprises is a typical project management implemented according to a certain order. Each mold reflects its independence from order receiving, design to production and testing, and requires a special project leader to manage the personnel, formulate a special design scheme, design a specific process, and organize a specific production process. Therefore, in the implementation of PDM system, whether to realize effective project management is the key to the success of PDM system

(4) C scope of application: comprehensive integration of AD/CAM/CAE

since it is inevitable for mold enterprises to apply CAD/CAM/CAE technology to mold design and manufacturing, PDM system should be made into a platform for fully integrating CAD/CAM/CAE technology, so as to ensure that anyone involved in relevant projects in the enterprise can obtain the correct and unique product information required at any place and at any time, and avoid confusion of product information caused by incorrect information processing in the intermediate links of manual participation

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