Performance calculation and analysis of the novel flexure hinges

Chuanli Wang; Cheng Li; Tao He; Guoyu Chen

doi:10.1117/12.2542647

13 November 2019 Performance calculation and analysis of the novel flexure hinges

Chuanli Wang, Cheng Li, Tao He, Guoyu Chen

Proceedings Volume 11343, Ninth International Symposium on Precision Mechanical Measurements; 1134309 (2019) https://doi.org/10.1117/12.2542647
Event: International Symposium on Precision Mechanical Measurements 2019, 2019, Chongqing, China

Abstract

A novel type of flexure hinge based on sine-cosine function notch is proposed. Its cutting width is half cycle of sinecosine function and cutting depth is maximum of sine-cosine function. Based on the bending theory, Hooke's law and calculus superposition principle of variable cross-section beams in material mechanics, a more concise formula for calculating rotational flexibility and tensile stiffness is derived and verified by finite element method under different structural parameters. The remarkable degree of influence of different structural parameters on flexibility was analyzed. By defining the flexibility accuracy ratio function, the performance of flexure hinges are compared with that of three typical flexure hinges of circular, elliptical and parabolic. The results show that the maximum error between the finite element solution and the analytical solution of rotational flexibility and tensile stiffness are less than 7%, which verified the correctness of these formulas. Flexibility is inversely proportional to minimum thickness, cutting width parameters and cutting depth. Flexibility is most sensitive to the change of minimum thickness. At the same time, performance analysis show that these kinds of hinges are very suitable for high precision transmission occasions

Citation Download Citation

Chuanli Wang, Cheng Li, Tao He, and Guoyu Chen "Performance calculation and analysis of the novel flexure hinges", Proc. SPIE 11343, Ninth International Symposium on Precision Mechanical Measurements, 1134309 (13 November 2019); https://doi.org/10.1117/12.2542647

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