This paper formulates a methodology for designing planar eight-bar linkages for five task positions, by adding two RR constraints to a user specified 6R loop. It is known that there are 32 ways in which these constraints can be added, to yield as many as 340 different linkages. The methodology uses a random search within the tolerance zones around the task specifications to increase the number of candidate linkages. These linkages are analyzed using the Dixon determinant approach, to find all possible linkage configurations over the range of motion. These configuration trajectories are sorted into branches. Linkages that have all the five task configurations on one branch, ensure their smooth movement through the five task positions. The result is an array of branch-free useful eight-bar linkage designs. An example is provided to illustrate the results.
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ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 17–20, 2014
Buffalo, New York, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4636-0
PROCEEDINGS PAPER
Synthesis of Useful Eight-Bar Linkages as Constrained 6R Loops
Kaustubh H. Sonawale,
Kaustubh H. Sonawale
University of California, Irvine, CA
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J. Michael McCarthy
J. Michael McCarthy
University of California, Irvine, CA
Search for other works by this author on:
Kaustubh H. Sonawale
University of California, Irvine, CA
J. Michael McCarthy
University of California, Irvine, CA
Paper No:
DETC2014-35523, V05AT08A076; 13 pages
Published Online:
January 13, 2015
Citation
Sonawale, KH, & McCarthy, JM. "Synthesis of Useful Eight-Bar Linkages as Constrained 6R Loops." Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 5A: 38th Mechanisms and Robotics Conference. Buffalo, New York, USA. August 17–20, 2014. V05AT08A076. ASME. https://doi.org/10.1115/DETC2014-35523
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