研究目的
Investigating the stiffness characteristics of flexure hinges fabricated by laser beam melted (LBM) additive manufacturing technology for precision manipulation systems.
研究成果
The LBM additive-manufactured flexure mechanism demonstrated linear stiffness characteristics suitable for precise positioning. However, considerations for manufacturing error, material property, and process parameters are necessary for future development of precision manipulators with advanced flexure structures.
研究不足
The manufacturing error of the additive-manufactured parts introduces complexity due to freeform fabrication. The influence of process parameters on fabrication quality and material properties was not fully explored. The accuracy of 3D scanning for measuring hinge thickness was limited by the rough surface of the as-built hinge.
1：Experimental Design and Method Selection:
The study involved designing a flexure parallel mechanism for precision manipulation, fabricated using LBM additive manufacturing technology. Finite element analysis was used to predict the stiffness characteristics of the mechanism.
2：Sample Selection and Data Sources:
A flexure parallel mechanism was fabricated using 316L stainless steel powder. The dimensions and material properties were measured and compared with the designed values.
3：List of Experimental Equipment and Materials:
A LBM metallic 3D printer (Farsoon, FS271M, China) was used for fabrication. A displacement sensor (KEYENCE, LK-G30, Japan) was used for measuring displacements.
4：Experimental Procedures and Operational Workflow:
The stiffness of the mechanism was tested by applying standard weights and measuring the resulting displacements. The experiment was repeated five times for accuracy.
5：Data Analysis Methods:
The experimental results were compared with finite element analysis predictions. A least square regression was used to determine the stiffness factor.
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