GB/T 39591-2020 in English
VALIDCommon data dictionary for geometry inspection quality information model of mechanical product
- Issued on:2020-12-14
- Implemented on:2021-07-01
- File Format:PDF
- Delivery:Via email within 10 business days
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《GB/T 39591-2020机械产品几何检测质量信息模型通用数据字典》由TC159（全国自动化系统与集成标准化技术委员会）归口，TC159SC5（全国自动化系统与集成标准化技术委员会体系结构、通信和集成框架分会）执行，主管部门为中国机械工业联合会。
Introduction
Standard Overview and Technical Background
GB/T 39591-2020, as an important standard in the field of mechanical industry, has established a standardized expression system for geometric inspection quality information in a digital manufacturing environment. This standard stems from the urgent need for interoperability of inspection data in high-precision manufacturing fields such as aviation and aerospace, and solves the problem of cross-platform data exchange through a unified data dictionary.
Core Architecture Analysis
| Architecture Levels | Composition Modules | Data Interaction Relationships |
|---|---|---|
| Application Layer | Detection MBD Model/Detection Plan Model and Other 6 Categories | Reference to Database Layer Data by ID |
| Database Layer | Original Information/Geometric Information and Other 14 Categories | Provide Basic Data Sharing |
Key Data Elements
7.1 Original Information
Contains Point(PointType), Unit vector (CUnitVectorType) and other basic geometric element definitions, the accuracy control parameters are as follows:
- Coordinate validity: Distinguish between 5 states such as report type and fuzzy type
- Decimal places: Support independent setting of X/Y/Z axes
7.4 Neutral PMI information
When defining datum target types, the standard supports 8 geometric definition methods:
- Circular surface definition (DatumTargetCircularAreaDefinitionType)
- Cylindrical surface definition (DatumTargetCylindricalAreaDefinitionType)
- Irregular surface definition (DatumTargetIrregularAreaDefinitionType)
Implementation suggestions
Application case of aviation parts inspection
In an aircraft structural parts inspection system, by referencing 7.8 Feature/Characteristic Class data elements, the following was achieved:
- Detection feature recognition accuracy increased by 40%
- Inspection plan preparation time shortened by 60%
Technology Evolution Analysis
Main improvements of this standard compared with previous versions:
| Version | Data Category | Extensibility |
|---|---|---|
| 2015 Edition | 8 types of basic data | Limited extension |
| 2020 Edition | 14 types of structured data | Support user-defined attributes |
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