The realization of accurate and convenient identification of the product and zero/component information is the basis for the integration of CAD and PDM information. The principle of product part code design should make the coding beneficial to the various BOMs of PDM generation products, and facilitate the system design data of CAPP and other systems to guide production planning and manufacturing. Therefore, the zero/part code should be considered to be easy for the engineering personnel to understand and use, conform to the specification, and fully and accurately describe the information required by the PDM. For the requirements to reflect the logical relationship of the product structure, a tree structure should be adopted, which reflects the logical affiliation of the product, and can automatically integrate the zero/component coding of CAD and PDM product information. For the generation of various parts list (BOM) shadow part coding, it should be combined with group technology, using classification coding. The structure of the code generally adopts a mixed structure of chain and tree. In the system of CAD and PDM information integration, the product shadow component code is required to have both information reflecting the logical structure of the product and information reflecting the characteristics of the component. Such products have a large number of coded bits, and different uses only require partial digit information of the code. For convenience of use, the zero/part code can be split into two coded items, one is zero/part logical relationship coding, ie code coding, and the other is zero/part geometry physical property coding, ie feature coding. The code code uses a tree structure (hierarchical structure), and the feature code uses a mixed structure of chain and tree. Regardless of code coding or feature coding, segmentation coding should be used. The same zero/part two codes are one-to-one associations. Different companies should formulate product coding rules according to their actual needs. They can also learn from the common coding standards at home and abroad, and combine the group technology (GT) to complete the product design coding. 1.4 Graphics and database information exchange Data exchange between AutoCAD graphics and database is the prerequisite for information integration between AutoCAD and PDM systems. The data exchange between AutoCAD graphics and database can be in two forms: one is attribute link mode; the other is new data link mode, which is to establish a link template. For the integration requirements of AutoCAD and PDM systems, the relevant data such as title bar and parts list in the design pattern are automatically transferred to the database system outside the AutoCAD system, and it is no longer necessary to manually create the database and input data. . For the above reasons, the use of attribute links is more flexible and convenient, in line with the requirements of engineering designers. 1) AutoCAD and database link: AutoCAD embeds VBA development environment, realizes the operation of AutoCAD by programming Automation object, macro in macro VBA project and other operations of AutoCAD complete the operation of graphics in the same process. At the same time, VBA can operate the database system across applications like VB, and configure the DB Engine database engine (Jet) to implement database link operations. 2) Attribute definition and extraction: Create a title bar, a detail bar graphic block (BLOCK), and set information such as zero/part code, code, name, and material to the attribute value of the corresponding tile. Both attribute definitions and attribute extractions are created by VBA programs as follows: (1) Attribute definition: Complete attribute graphic block creation, including attribute setting of all information of title bar and parts list. (2) Adding title bar and detail column information: Implementing attribute block call, attribute value addition, tile insertion and other operations. (3) Database operation: automatically create database files, establish data tables, data fields, and discriminate and feedback the database, tables, and corresponding records during the new record addition process to prevent duplicates and omissions. (4) Attribute extraction: Take out the attribute values ​​of the named block and add them to the database to become the corresponding records in the data table. Previous page next page Automation Application Sensors Widely used in the field of industrial automation, such as automatic precision assembly, automatic grinding, automatic sorting device, automatic filling system, textile equipment tension monitoring, and torque torque. Zhejiang Nanhua Electronic Technology Co., Ltd , https://www.nhloadcells.com
1.3 Product Zero / Part Code Design