Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Mechanical Error Analysis of Disk Cam Mechanisms with a Flat-Faced Follower

  • Chang Wen-Tung (Department of Power Mechanical Engineering, National Tsing Hua University) ;
  • Wu Long-Iong (Department of Power Mechanical Engineering, National Tsing Hua University)
  • Published : 2006.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

By employing the concept of equivalent linkage, this paper presents an analytical method for analyzing the mechanical errors of disk cam mechanisms with a flat-faced follower. The resulting error equations do not really involve the location of the curvature center of the cam profile, and locating the curvature center of the cam profile is not essential. The resulting errors are significantly affected by the pressure angle, and the smaller pressure angle will result in the smaller mechanical error. In the worst case, owing to the joined effects of various design parameters, the accuracy of the follower motion may degrade considerably. For the oscillating follower case, all acceleration error functions have a sudden change at every beginning and at every end of the motion even though the theoretical follower displacement is cycloidal motion.

Keywords

References

  1. Chiu, H., Ozaki, H., Sato, E., Suzuki, T., Oho, A. and Ariura, Y., 1993, 'An Analysis Using Offset Curves for Profiles, Manufacturing and Errors of Plane Cams,' JSME International Journal-Part C, Vol. 36, No. 1, pp. 110-118
  2. Davison, J. K., 1978, 'Calculating Cam Profiles Quickly,' Machine Design, 7 December, pp. 151-155
  3. Garrett, R. E. and Hall Jr., A. S., 1969, 'Effect of Tolerance and Clearance in Linkage Design,' ASME Journal of Engineering for Industry, Vol. 91B, pp. 198-202
  4. Giordana, F., Rognoni, V. and Ruggieri, G., 1979, 'On the Influence of Measurement Errors in the Kinematic Analysis of Cams,' Mechanism and Machine Theory, Vol. 14, No. 5, pp. 327-340 https://doi.org/10.1016/0094-114X(79)90019-3
  5. Grosjean, J., 1991, Kinematics and Dynamics of Mechanisms, McGraw-Hill, New York, pp. 267-285
  6. Hall Jr., A. S., 1961, Kinematics and Linkage Design, Balt, Indiana, pp. 2-3, 65-67
  7. Hartenberg, R. S. and Denavit, J., 1964, Kinematic Synthesis of Linkages, MacGraw-Hill, New York, pp. 59-63, pp. 295-306, 315-320
  8. Kim, H. R. and Newcombe, W. R., 1982, 'The Effect of Cam Profile Errors and System Flexibility on Cam Mechanism Output,' Mechanism and Machine Theory, Vol. 17, No. 1, pp. 57-71 https://doi.org/10.1016/0094-114X(82)90024-6
  9. Norton, R. L., 1988, 'Effect of Manufacturing Method on Dynamic Performance of Cams-an Experimental Study : Part I-Eccentric Cams and Part II-Double Dwell Cams,' Mechanism and Machine Theory, Vol. 23, No. 3, pp. 191-208 https://doi.org/10.1016/0094-114X(88)90104-8
  10. Norton, R. L., 2002, Cam Design and Manufacturing Handbook, Industrial, New York, pp.315-334
  11. Pulkrabek, W. W., 1997, Engineering Fundamentals of the Internal Combustion Engine, Prentice-Hall, New Jersey, p. 16, 24
  12. Rao, S. S., 1984, 'Error Analysis of Cam-Follower Systems : a Probablistic Approach,' Proceedings of the Institution of Mechanical Engineers-Part C, Journal of Mechanical Engineering Science, Vol. 198, No. 12, pp. 155-162 https://doi.org/10.1243/PIME_PROC_1984_198_103_02
  13. Rees-Jones, J., 1978, 'Mechanisms, Cam Cutting Co-ordinates,' Engineering, March, pp. 220-224
  14. Rees-Jones, J., 1978, 'Mechanisms, Cam Curvature and Interference,' Engineering, May, pp. 460-463
  15. Rothbart, H.A. (Ed.), 2004, Cam Design Handbook, McGraw-Hill, New York, pp. 285-301
  16. Spotts, M. F., 1985, Design of Machine Elements, 6th Edition, Prentice-Hall, New Jersey p. 611
  17. Wang, W. H., Tseng, C. H., Tsay, C. B. and Ling, S. F., 1993, 'On the Manufacturing Tolerance of Disk Cam Profile,' Journal of Materials Processing Technology, Vol. 38, No. 1-2, pp. 71-84 https://doi.org/10.1016/0924-0136(93)90187-B
  18. Wu, L. I., 2003, 'Calculating Conjugate Cam Profiles by Vector Equations,' Proceedings of the Institution of Mechanical Engineers-Part C, Journal of Mechanical Engineering Science, Vol. 217, No. 10, pp. 1117-1123 https://doi.org/10.1243/095440603322517135
  19. Wu, L. I. and Chang, W. T., 2005, 'Analysis of Mechanical Errors in Disk Cam Mechanisms,' Proceedings of the Institution of Mechanical Engineers-Part C, Journal of Mechanical Engineering Science, Vol. 219, No. 2, pp. 209-224 https://doi.org/10.1243/095440605X8405