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Research Papers

Improving the B-Spline Method of Dynamically-Compensated Cam Design by Minimizing or Restricting Vibrations in High-Speed Cam-Follower Systems

[+] Author and Article Information
J. K. Jiang

School of Sciences, Xi’an University of Technology, Xi’an, Shaanxi 710048, China

Y. R. Iwai

Department of Mechanical Engineering, Fukui University, Fukui, 910-8507 Japan

J. Mech. Des 131(4), 041003 (Mar 20, 2009) (8 pages) doi:10.1115/1.3086793 History: Received February 15, 2008; Revised December 27, 2008; Published March 20, 2009

This paper presents an improved method for dynamically-compensated (tuned) cam design by minimizing or restricting vibrations in high-speed cam-follower systems. Using this approach, cams can be synthesized with a variety of design requirements and reduced residual vibrations. An example of the dynamically-compensated B-spline method illustrates the application process and demonstrates the improvement effect. While preserving the features of the B-spline method, the improved design method allows the cams to satisfy requirements, such as pressure angle, radius of curvature, and contact stress, and also reduces the residual vibrations caused by deviations in actual cam speed or system damping ratio from their design values.

Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Approximate substitution of motion curves with step curves: (a) acceleration curve and (b) velocity curve

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Figure 2

Displacements of output motion

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Figure 3

Velocities of output motion

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Figure 4

Accelerations of output motion

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Figure 5

Jerks of output motion

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Figure 6

Fourth derivatives of output displacement

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Figure 7

Displacements of cam motion

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Figure 8

Velocities of cam motion

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Figure 9

Accelerations of cam motion

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Figure 10

Comparison of residual vibration

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Figure 11

Pressure angle of cam profile

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Figure 12

Radius of curvature of cam profile

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Figure 13

Cam-follower contact force

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Figure 14

Cam-follower contact stress

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Figure 15

Comparison of residual vibration characteristics

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Figure 16

Comparison between residual vibrations

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