Abstract: Automated equipment and systems with different functions and from different manufacturers are widely existed in the workshop/factory. They bring a large number of heterogeneous information distributed at different network levels. The interconnection and interoperability between heterogeneous systems and devices is the basis for the informationization and intelligent manufacturing, and is a core issue in digital workshop integration. The key to solving this problem is to establish a standard and consistent information model. The architecture of the information model of digital machining workshop for machine tools is proposed based on the analysis of its structure, functional model and information flow. By clarifying the element definition, modeling rules and methods, the standardization and consistency of the information model of the digital workshop is achieved. Then, the rules that map the information model in to the OPC UA (Unified architecture) address space is established. The approach for implementing data storage and interaction of the information model based on the OPC UA server/client are also discussed. Finally, the feasibility of mapping the information model to the OPC UA address space is verified. An instantiated information model is established based on an instance of application scenario, and the practicability of the information model is tested.

Key words: digital workshop, experimental verification, information model, machine tools manufacturing, OPC UA