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Compliant Mechanisms Formed From Shaped Wire

[+] Author Affiliations
Tyler M. Pendleton, Brian D. Jensen

Brigham Young University, Provo, UT

Paper No. DETC2007-34969, pp. 75-81; 7 pages
doi:10.1115/DETC2007-34969
From:
  • ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 31st Mechanisms and Robotics Conference, Parts A and B
  • Las Vegas, Nevada, USA, September 4–7, 2007
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4809-4 | eISBN: 0-7918-3806-4
  • Copyright © 2007 by ASME

abstract

This paper presents an alternative to fabrication methods commonly used in compliant mechanisms research. This method integrates torsional springs made of formed wire into compliant mechanisms. In this way the desired force, stiffness, and motion can be achieved from a single piece of formed wire. Two techniques of integrating torsion springs are fabricated and modeled: helical coil torsion springs and torsion bars. Because the mechanisms are more complex than ordinary springs, simplified models, which aid in design, are presented which represent the wireform mechanisms as rigid body mechanisms using the pseudo-rigid-body model. The method is demonstrated through the design of a mechanically tristable mechanism. The validity of the simplified models is discussed by comparison to finite element models and, in the case of the torsion bar mechanism, to experimental measurements.

Copyright © 2007 by ASME

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