| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 96 === The purpose of the study is to develop a S-type flexural pivot for parallel motion mechanism. Firstly, using Euler-Bernoulli beam theory and curve beam theory for generating the model of the flexural pivot. Besides the model was constructed, the relation between stress and displacement of the flexural pivot was carried out. Based on the model and specification requirements, the flexural pivot of the parallel mechanism was designed. The CNC wire electrical discharge machining (WEDM) are then employed in manufacture the flexural pivot of the parallel mechanism. Finally, the model test results were compared with results from finite-element method (FEM) analysis software ANSYS. All of the conventional rotational joints there is relative motion causing friction that leads to wear and increase clearances. According to the relation between allowable stress and required displacement, designer could find the geometric dimension of the flexural pivot. The results show that the FEM analysis results are less than 10% error compared with the analytical predictions. Compared to conventional rotational joints, flexural pivot are highly-efficient angular motion agents that present zero friction and backlash in application such as straight line motion mechanism, micro-positioning stage.
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