Blanking and stamping operations, including both separating and forming processes, play an important role in the manufacturing of aircraft structural components. These operations account for approximately 60-70% of the total number of aircraft structural parts, while their labor intensity represents about 10-12% of the total manufacturing labor input. The increasing use of difficult-to-deform materials, such as high-strength steels, titanium alloys, and composite materials, further increases the importance of blanking and stamping technologies in modern aircraft production [1]. Under these conditions, the development of computer-aided process planning (CAPP) systems for blanking and stamping operations becomes an important element of the digital transformation of aircraft manufacturing. The implementation of such systems requires the integration of formal mathematical models describing production objects, including aircraft skins, spar webs, rib walls, ribs, and frames made of sheet materials. These models also represent manufacturing processes and the selection of technological tooling. The effectiveness of computer-aided manufacturing systems depends on compliance with the principles of system integrity, interoperability, scalability, and standardization. Their implementation is supported by international standards ISO 10303 (STEP) and ISO 13584 (Parts Library), which provide a framework for the representation and exchange of product and manufacturing data. These standards are conceptually based on the Structured Analysis and Design Technique (SADT) methodology. However, many existing process planning systems rely on empirical rules and heuristic decision-making procedures, which limits their universality and reproducibility. This study aims to develop and validate a computer-aided process planning system for blanking and stamping operations based on a hierarchical system of mathematical models implemented within the ISTRA framework. Industrial validation confirmed the adequacy of the developed models and the stability of the generated technological solutions, demonstrating the applicability of the proposed approach for automated technological process planning in aircraft manufacturing, with potential relevance for Industry 4.0-oriented manufacturing systems.
Keywords
Computer-Aided Process Planning (CAPP)Blanking and Stamping OperationsAircraft Structural PartsMathematical ModelingProduction System ModelingDigital ManufacturingIndustry 40
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