With the development of information technology and computer network technology, manufacturing has entered a new era of global competition. As one of the important basic industries in modern manufacturing industry, the mold manufacturing industry is widely used in production. Almost all hardware , plastics, and rubber products need to be manufactured through mold processing. Because the efficiency of mold design and manufacturing has a decisive influence on the development efficiency of products, in order to adapt to the needs of global competition, mold companies must move from decentralization to cooperation, and mold collaboration must be carried out between mold design organizations, manufacturing companies, and mold users. With the use of networked collaborative technologies and their respective technological advantages, we can quickly develop high-quality mold products.
First, the status quo of the development of mold coordination technology The computer-supported collaborative work (Computer Supported Cooperative Work, abbreviated as CSCW) was first proposed by Irene Greif of the Massachusetts Institute of Technology and Paul Cashman of DECIO (DEC) in 1984. It refers to the technical support of computers. In the environment (that is, CS), a group works together to complete a common task (ie, CW). Its goal is to design a variety of collaborative applications. Including the construction of collaborative work systems, the study of group work methods, and the related technical research supporting group work, and the development of application systems.
On the collaborative design and manufacturing platform for molds, many researches have been done at home and abroad in recent years.
The National Die & Mold CAD Engineering Research Center of Shanghai Jiaotong University studied the key technologies of the mold collaborative manufacturing system and applied the CSCW technology to the injection mold CAD/CAE/CAM/system integration, establishing three levels of application layer, communication layer and data layer. On the collaborative model, and proposed dynamic constraint solving technology and integrated conflict resolution model.
The Department of Manufacturing Engineering of Nanjing University of Science and Technology carried out research on CSCW-oriented CAD/CAM system, proposed an architecture of WEB-based remote collaborative design and manufacturing system and developed an application platform. The system adopts the B/S structure and utilizes key technologies such as computer networks, COM components, collaborative work management, distributed data management, security control, constraint management, and conflict resolution to realize networked collaborative design and manufacturing in different places.
CMS Laboratory Institute of Mechanical and Electrical Engineering, Guangdong University of Technology to develop a suitable mold manufacturing enterprises in South China featuring mold networked manufacturing collaboration platform, and the development of a variety of functional modules cooperative manufacturing system for mold enterprises in southern China on this basis. It mainly includes two parts: enterprise information and resource sharing platform and mold collaborative design and manufacturing platform.
The State Key Laboratory of Plastic Forming Simulation and Die & Mould Technology of Huazhong University of Science and Technology puts forward the organizational structure of an integrated information model that satisfies the collaborative design process of moulds, and builds a mould collaborative design framework with a four-layer organizational structure.
The Institute of Mechanical Science and Engineering of Jilin University faces the research and development of the mold manufacturing networked manufacturing platform. It mainly implements three modules including user management authority, project management, and collaborative tool integration. The platform system is based on the computer support collaborative work (cscw), in the Windows2000 Professional system environment, the product database as a framework, using dynamic web programming technology (ASP) and Java3D language development and implementation.
In addition, major scientific and technological projects of the Science and Technology Department of Fujian Province and the Open Fund Project of the Key Laboratory of Automobile Engineering of Jiangsu Province have also done a lot of research in this area. From these current conditions, it can be seen that a large number of scholars have done research on the networked collaborative platform for molds and achieved certain results. However, as some key technical links have not been resolved, some of the so-called “collaboration†that are being implemented are simply to negotiate through e-mails. Some of them are only used within a single enterprise, and these cannot be called in a complete sense. Networked collaboration. In order to truly achieve effective networked collaborative design and manufacturing in the development of mold products, it is also necessary to do a lot of research and development work down-to-earth.
Second, the direction of development of mold co-technology Network co-design and manufacturing is the main production mode of the 21st century, it effectively increased the resource utilization rate of the industry, strengthened the cooperation between enterprises, and greatly increased production efficiency. With the continuous advancement of science and technology, the manufacturing industry is developing in the direction of digitization, intelligence, networking and globalization. The life cycle of products is getting shorter and shorter, and the market for new products is getting faster and faster. According to Luo Baihui, CEO of Die & Mould, the mold is the basic process equipment of the manufacturing industry. The efficiency of mold design and manufacturing has a decisive influence on the product development efficiency. At present, computer technology has been widely used in processing and manufacturing industries. Some mold manufacturing enterprises in China are gradually adopting CAD/CAPP/CAE/CAM and other advanced technologies for mold development and have achieved certain results. But overall, there is still a big gap between China's mold development technology and market requirements. Therefore, the establishment of an industry-based collaborative design and manufacturing platform to fully revitalize the resources within the industry and optimize the design and manufacturing processes has a tremendous role in promoting the overall competitiveness of the industry.
The industry-oriented mold networking collaboration platform integrates industry manufacturing information and resources, including the collaborative development of mold network, network resource supply, networked manufacturing, networked equipment , technology, human resources, development tools and management software sharing. The industry networked collaborative service platform, etc., to improve the industry's product innovation capabilities, flexibility, ability to resist risks and the industry's overall competitiveness.
The industry-oriented mold networking collaboration platform is based on the current popular J2EE/EJB, using XML and Ajax technology to build, and realize cross-platform networked system information resource integration. It consists of four levels: database management layer, basic management and maintenance layer, functional module layer, and user web page layer.
1) User web page layer: Provides an interactive graphical interface on the user's browser, including various menus, dialogs, etc., to support the operation of commands and the input and output of information. Through the visual interface provided by the platform, users can intuitively and conveniently perform operations on various objects in the entire system. It is the trigger point and medium for realizing various functions of the platform and is at the top.
2) Functional module layer: In addition to system management, the main function modules provided by the platform for users include browsing and query of shared resources for all users, software rental, collaborative work for franchise companies, and other website services such as forums. Blogs, etc.
3) Basic management and maintenance layer: This layer provides basic management to implement various related functions of the platform. Since the object management framework of the platform system has the features of masking heterogeneous operating systems, networks, and databases, the user can realize transparency of application calls, data operations, and process management when various functions of the platform system are applied.
4) Database Management: Supports the management of platform system objects in the underlying database through the data manipulation functions provided by relational databases.
The functional modules of the industry-oriented mold networking collaboration platform mainly include public resources, market information resources, and collaborative platforms. The market information part realizes a complete supply chain, and registered companies can issue purchase and supply information. If the company needs outsourcing, it can also conduct bidding and bidding operations. Collaborative work is the most critical part of a collaborative platform. After a company establishes a collaborative relationship, it can apply the functions of a collaborative work platform, from project creation to task decomposition, to collaboration and adjustment, and finally to logout, all of which can be provided through the platform. Collaborative ways to communicate at any time.
1. The establishment of a collaborative management system The networked collaborative development model requires the personnel of multiple departments of different companies to perform various subtasks of the project at different locations simultaneously. In order to support group collaboration, an integrated collaborative project management system must be established. The collaborative project management system is based on the Web network, and the project managers and collaborative work teams share resources (data, documents, design tools, etc.) under a certain authority. Luo Baihui believes that in the establishment of collaborative project management system, full consideration should be given to the characteristics of mold project management (multi-project parallelism, task schedule uncertainty, etc.), complete the project sub-plan decomposition and schedule control, resolve conflict and change issues. At the same time, through the collaborative project management system to solve the problem of rational allocation of project resources, project quality control and project cost and cost control.
2. Remote sharing and management of resources The resources of the mold networking platform mainly include equipment resources, technical resources, human resources, software tool resources, electronic resources, and information resources. How to achieve optimized integration within the industry, reduce duplication of resources, reduce idle resources, and increase resource utilization are key issues in improving the overall competitiveness and benefits of the mold industry. Online rental of mold software and management system software, and the realization of DNC remote control, the establishment of agile and efficient supply chain management system, is an important way to achieve remote sharing and management of resources.
3. The establishment of a visual collaborative interactive platform The establishment of a visual collaborative interactive platform provides guarantee for the realization of networked collaboration. In addition to using basic methods such as traditional e-mail and online chat, the full cooperation between customers, designers, and manufacturing staff can be better achieved through efficient methods such as web video conferencing, electronic whiteboards, and desktop collaboration tools.
4. Product Data Management PDM is the core component of product life cycle management and is the data management center for each product project. The product data management of the mold network collaboration platform mainly includes the model structure, engineering drawings, technical documents, process information, and progress information. Due to the characteristics of networking, product data must support distributed environments, and ensure real-time consistency and security, and do a good job of version control and management.
5. Security Technology The users of the networked collaborative system platform are distributed in different regions and enterprises. They undertake different tasks in the project, have different rights to access to the system, and must set the access control. Access control is an important mechanism for implementing distributed information system security protection. Using the “user-role-function†privilege control mode, the system can assign roles to each user and control the role of the system's detailed functions, such as adding, deleting, checking, and revising certain information, and using role combinations to control Its permissions. The system can also track the user's operations in the network platform through access control technology and record it in the corresponding database so that it is well documented.
In addition, networked collaboration requires a large amount of data to be transmitted over the network. Because of the openness of the Internet protocol and the randomness of routing, data transmitted in different places can easily be stolen. Therefore, we must use encryption and decryption technologies to ensure the security of data transmission. , discover and prevent hackers in time.