GB/T 39334.1-2020 in English

GB/T 39334.1-2020, as the basic document of the series of standards for digital simulation of mechanical manufacturing, establishes a general framework for the application of simulation technology. For the first time, the standard clearly divides simulation types into two major systems: process simulation and manufacturing system simulation, and realizes full life cycle management through structured processes.

Typical application scenarios

An automotive parts company found that the gearbox housing assembly had a 0.3mm cumulative tolerance through assembly process simulation, and optimized the positioning solution in advance to avoid batch quality problems, so that the first-time assembly qualified rate was increased to 99.2%.

Model construction specifications

• Geometric accuracy: key mating surface deviation ≤±0.05mm
• Lightweight requirements: The number of faces of the assembly simulation model is controlled within 500,000
• Data association: The process model and PBOM need to keep the version synchronized

This standard incorporates additive manufacturing simulation into the specification system for the first time, reflecting the development needs of new technologies. Compared with international standards such as ISO 10303-238, it adds digital twin data management requirements in the manufacturing system simulation dimension, reflecting the characteristics of China's manufacturing industry.