0 Preface
Most of the food machinery equipment is designed and manufactured according to the order, with many varieties, small batch size and short delivery period. Therefore, shortening the design and manufacturing cycle and improving the quality of design and manufacturing are the key to improving the competitiveness of the enterprise market. Realizing data sharing and collaborative work is an effective way to shorten the design and manufacturing cycle. However, in the traditional production mode, the design file management is chaotic, the design process is not standardized, and the “information island†phenomenon is serious, and it is difficult to realize data sharing and collaborative work.
The data management of traditional food equipment manufacturing enterprises mainly has the following problems:
(1) The degree of data sharing is poor, and parallel design is difficult. Food machinery combines the expertise of multiple disciplines, resulting in a wide variety of documents and data in the design and manufacturing process. In the traditional mode, documents and data are stored in paper form. It is very difficult for engineers and technicians to retrieve the required data from a large number of databases, let alone data sharing and parallel design.
(2) File management is confusing and data reuse is difficult. Effective structural configuration and version management of product documentation and data is not possible, which brings great difficulties to the reuse of data for common parts.
(3) The process is not standardized. The project execution process is carried out through the communication between employees, and the execution efficiency is low. Without an effective monitoring mechanism, many important links are easily overlooked, resulting in low reliability of the product.
The birth of product data management (PDM) technology provides new ideas for solving the difficulties faced by traditional enterprises. It uses the computer network and database technology to achieve orderly management and efficient sharing of product data. This technology has been widely used in equipment manufacturing enterprises in developed countries. China's PDM technology started late and has not been applied and popularized in food machinery equipment enterprises. Based on SolidWorks Enterprise PDM, SQL Server and Auto CAD Mechanical software platform, the application of PDM technology in food equipment manufacturing enterprises is explored and studied.
1 PDM system implementation plan overall architecture
The overall structure of the food machinery equipment PDM system is shown in Figure 1, which can be divided into three levels:
(1) Application layer. It provides a user-friendly configuration interface, design process management, and document management by providing a friendly interface.
(2) System service layer. It provides integration and data exchange between PDM system and application software by providing a consistent interface;
(3) Network layer. It implements basic computing and communication services between distributed input and output devices, computers and databases through network connections.
2 Key technologies for PDM system implementation
2.1 Product Data Management
(1) Distributed, multi-type file management
The data of each department is stored in the PDM database. The database is completely transparent to users with access rights. Users can easily preview and download data in various formats in the database through the interactive interface. Print and publish.
For multiple versions of a document in a series of products, the system provides a document version buried function, users can quickly and accurately retrieve the correct version by simply entering relevant search conditions.
(2) Data retrieval and reuse
Food machinery equipment has a considerable number of parts that are common parts. Therefore, many drawings can be borrowed when developing new products. The PDM system's custom search function allows engineers to quickly and accurately find the files they need and the files they have associated with, as shown in Figure 4(a), to achieve reuse of the design results. At the same time, for the common parts commonly used by enterprises, establish the enterprise standard parts library as shown in Figure 4(b). The engineering technicians can select the appropriate common parts according to the requirements. The pattern and BOM information of the parts will be automatically called to relevant. In the assembly drawing.
(3) Product structure management
In the PDM system, components are organized according to the assembly relationship, and the user associates the definition data of various products with the components, and finally forms a complete description of the product structure. These structured data will provide a good basis for post-data reuse, generation of schedules and purchased parts lists, and data exchange.
(4) Data security
The PDM system provides a privileged data sharing mechanism, that is, the system assigns different data access rights according to different responsibilities of various personnel, and processes different ranges of data; according to the business nature of the department, it is divided into different data warehouses, thereby Realize data security, reliability, and convenient and efficient sharing.
2.2 Workflow Management
(1) Role management
The user's role attributes include personal and organizational attributes. Personal attributes are static attributes, including the employee's job number, user name, and permissions. Organization attributes include both the static attributes of the department to which the individual belongs and the dynamic attributes of the project group and project role. The combination of the two attributes will make character management extremely convenient.
The PDM system administrator can define their personal attributes according to the job responsibilities of the engineering staff, as shown in Figure 5(a). At the same time, according to the actual situation of the company, some working groups can be set up, such as design group, process group and standardization group. Etc., as shown in Figure 5(b), and set the appropriate permissions for each workgroup, the people assigned to the group will get the permissions of the group.
(2) File uniform coding
In order to achieve orderly management of data for digitized products, product data must be uniformly encoded. The PDM system can uniformly encode and manage the products and components, parts, purchased parts, standard parts, technical documents and drawings of the raw materials. The user only needs to submit the code request to the system, and the system will automatically assign a code to the user. This code is uniformly allocated by the system, so the uniqueness of the code can be well controlled.
(3) Project process management
The PDM system pre-defines multiple workflow templates according to the needs of the enterprise. At the initial stage of project allocation, the project management personnel or the person in charge of the design department selects the appropriate process template according to the plan, as shown in Figure 6, and arranges each node on the process. Responsible persons, such as designers, auditors, standardization personnel, approvers, etc., will be given the corresponding work rights according to the position of the responsible person on the node.
After the task is started, the execution of the entire workflow is automatic. For example, the designer will automatically enter the review process after submitting the drawings. The auditor will receive the prompt information and must complete the audit within the specified time. If the audit is approved, Entering the standardization process, if the review fails, it will return to the design process, and the auditor can make some annotations on the wrong place.
3 Conclusion
For the PDM system developed by the food machinery equipment enterprise, the product-centered, through the computer network and database technology, integrates all the product-related information and processes in the enterprise design process and production process, and manages the product data in its life cycle. Consistent, up-to-date and safe, providing a good working environment for engineers and technicians. This system is an important tool for food machinery companies to reduce costs, shorten product design and manufacturing cycles, improve customer satisfaction, and enhance corporate competitiveness.
Bathtub,Tub Faucet,Drain,Shower Faucet
Bathtub Co., Ltd. , http://www.nbsanitary.com