﻿ 非对称运动曲线对凸轮机构接触应力之影响

# 非对称运动曲线对凸轮机构接触应力之影响Effects of Asymmetrical Motion Curve on Contact Stress of the Cam Mechanisms

Abstract:
By applying the asymmetrical motion curve, the kinematic characteristics of the follower motion of the cam mechanism can be improved. This paper also investigates the effects of asymmetrical motion curve on the induced con-tact stress of the mechanism. The results show that the follower motion will have lower maximum deceleration when the cam angle of the deceleration interval is larger than that of the acceleration interval, and in such condition, it may lead to a smaller extreme resulting load caused by the spring force and inertia forces. The asymmetrical ratio of motion curve must be properly specified so as to obtain optimum benefits of the contact stress.

[1] R. L. Norton. Cam design and manufacturing handbook. New York: Industrial Press, 2002: 236-238.

[2] H. A. Rothbart. Cam design handbook. New York: MacGraw-Hill, 2004: 222-224.

[3] F. A. Chen. Mechanics and design of cam mechanisms. New York: Pergamon Press, 1982: 307-309.

[4] 郭连声, 柴邦衡. 凸轮机构[M]. 北京: 中国机械工业出版社, 1976: 99-127.

[5] 陈雪芳. 非对称运动规律在自动捆扎机凸轮轮廓改进设计中的应用[J]. 包装与食品机械, 1997, 15(6): 34-36.

[6] J. Reeve. Cams for industry. London: Mechanical Engineering Publications Limited, 1995: 57-61, 90-98.

[7] C. N. Neklutin. Mechanisms and cams for automatic machines. New York: American Elsevier, 1969: 96-97.

[8] 张文桐. 非对称运动曲线对凸轮机构接触力之影响[J]. 机构与机器设计, 2003, 14(3): 11-24.

[9] 刘昌棋(中), 牧野洋(日), 曹西京(中). 凸轮机构设计[M]. 北京: 机械工业出版社, 2005: 39-41.

[10] J. A. Collins. Mechanical design of machine elements and machines. New York: John Wiley & Sons, 2003: 232-237.

[11] L. I. Wu, S. H. Wu and H. S. Yan. Simplified graphical determination of disk-cam curvature. Mechanism and Machine Theory, 1999, 34: 1023-1036.

[12] A. Biswas, M. Stevens and G. L. Kinzel. A comparison of approximate methods for the analytical determination of profiles for disk cams with roller followers. Mechanism and Machine Theory, 2004, 39: 645-656.

[13] J. K. Davidson. Calculating cam profiles quickly. Machine Design, 1978, 50(28): 151-155.

[14] 颜鸿森, 吴隆庸. 机构学[M]. 台湾: 台湾东华书局股份有限公司, 2006: 268-285.

[15] L. I. Wu. Calculating conjugate cam profile by vector equation. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2003, 217(10): 1117-1123.

[16] P. W. Jenson. Cam design and manufacture (2nd edition). New York: Marcel Dekker, 1987: 141-150.

Top