Knowledge expression model-based complex curved surface digital manufacturing method

Abstract

The invention discloses a knowledge expression model-based complex curved surface digital manufacturing method, and the method comprises the following steps that S1, a knowledge integration module, a simulation module and an in-situ measurement-compensation module are constructed; S2, a similarity threshold alpha is established by adopting a semantic understanding reasoning strategy based on W ND IC; S3, when alpha is more than or equal to 0.95, the knowledge integration module is directly connected with and controls the in-situ measurement-compensation module; S4, when alpha is more than or equal to 0.80 and less than 0.95, the knowledge integration module is connected with and controls the simulation module to modify the defects existing in the model, after the defect modification is finished, the simulation module transmits the model data to the in-situ measurement-compensation module after data conversion, and the in-situ measurement-compensation module carries out numerical control machining; and S5, when alpha is less than 0.8, the cooperation of human experts is required to complete the process; and the knowledge expression model-based complex curved surface digital manufacturing method establishes an integrated knowledge expression model in three fields of through design, processing, simulation optimization and measurement, and based on this, a knowledge base and an inference mechanism are constructed, and the knowledge expression model-based complex curved surface digital manufacturing method provides theoretical and technical support for intelligent closed-loop manufacturing of the complex curved surface part.

Description

Technical field [0001] The invention specifically relates to a digital manufacturing method for complex curved surfaces based on a knowledge expression model. Background technique [0002] The development of industry and the progress of science and technology, the processing and production of sophisticated, sophisticated, and sophisticated products in the fields of aviation, aerospace, energy, and microelectronics continue to pose new challenges to the extreme performance of modern manufacturing processes, equipment and systems, and urgently require quantitative understanding and Master the essential laws of manufacturing activities so that digital technology and advanced manufacturing technology can be organically combined, so that advanced manufacturing technology enters the digital age. Complex curved parts such as aero engine impellers, large key aerospace structural parts, large ship propellers, and precision mold curved parts are the core components that constitute the coun...

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Problems solved by technology

[0014] (2) From the perspective of system theory, although some achievements have been made in a single field, it is difficult to take advantage of integration. The fundamental reason is that there is no systematic knowledge system that can integrate these technologies

[0015] (3) A major obstacle affecting the improvement of the design-processing-measurement integration level is that decision-making control and data processing rely too much on the participation of experts, which seriously hinders the improvement of the system's digitalization and intelligence levels, thereby hindering efficiency and accuracy

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