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Technical Brief

Positive-Drive Cam Mechanisms With a Translating Follower Having Dual Concave Faces

[+] Author and Article Information
Kuan-Lun Hsu

Department of Power Mechanical Engineering,
National Tsing Hua University,
No. 101, Section 2,
Kuang-Fu Road,
Hsinchu, 30013, Taiwan
e-mail: kaunlwun.shu@gmail.com

Hui-An Hsieh

Department of Power Mechanical Engineering,
National Tsing Hua University,
No. 101, Section 2,
Kuang-Fu Road,
Hsinchu, 30013, Taiwan
e-mail: sfaayll@hotmail.com

Long-Iong Wu

Professor
Department of Power Mechanical Engineering,
National Tsing Hua University,
No. 101, Section 2,
Kuang-Fu Road,
Hsinchu, 30013, Taiwan
e-mail: liwu@pme.nthu.edu.tw

Manuscript received August 8, 2015; final manuscript received January 2, 2016; published online March 17, 2016. Assoc. Editor: James Schmiedeler.

J. Mechanisms Robotics 8(4), 044504 (Mar 17, 2016) (8 pages) Paper No: JMR-15-1215; doi: 10.1115/1.4032863 History: Received August 08, 2015; Revised January 02, 2016

This article proposes a cam mechanism with a translating follower that has dual concave faces, and also demonstrates how to design such a mechanism. This is a positive-drive cam mechanism because the dual concave faces of the follower can simultaneously contact the cam at any instant. The contact forces and the contact stresses of the mechanism are analyzed to illustrate the nature and the capability of reducing contact stress of this novel follower. This cam mechanism is found to have lower contact stress over the constant-breadth and the constant-diameter cam mechanisms.

FIGURES IN THIS ARTICLE
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Copyright © 2016 by ASME
Topics: Stress , Design , Pressure , Rotation
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References

Chen, F. Y. , 1982, Mechanics and Design of Cam Mechanisms, Pergamon Press, New York.
Jensen, P. W. , 1987, Cam Design and Manufacture, 2nd ed., Marcel Dekker, New York.
Norton, R. L. , 2002, Cam Design and Manufacturing Handbook, Industrial Press, New York.
Rothbart, H. A. , 2004, Cam Design Handbook, McGraw-Hill, New York.
Carra, S. , Garziera, R. , and Pellegrini, M. , 2004, “ Synthesis of Cams With Negative Radius Follower and Evaluation of the Pressure Angle,” Mech. Mach. Theory, 39(10), pp. 1017–1032. [CrossRef]
Wu, L. I. , Liu, C. H. , and Chen, T. W. , 2009, “ Disc Cam Mechanisms With Concave-Faced Followers,” Proc. Inst. Mech. Eng., Part C, 223(6), pp. 1443–1448. [CrossRef]
Li, L. , Yang, H. D. , An, S. E. , Shin, J. H. , and Kwon, S. M. , 2010, “ Breadth Cam Profile Design With Oscillating Roller Follower,” IEEE International Conference on Mechatronics and Automation (ICMA), Xi'an, China, Aug. 4–7, pp. 389–394.
Shu, K. L. , and Wu, L. I. , 2012, “ Synthesis of Constant-Breadth Cam Mechanisms,” Mech. Eng. Technol., 1(1), pp. 1–6 (in Chinese).
Shu, K. L. , Hsieh, M. T. , and Wu, L. I. , 2013, “ Synthesis of Constant-Breadth Cam Mechanisms With an Oscillating Follower,” Sci. J. Mech. Eng., 3(2), pp. 37–44 (in Chinese).
Davidson, J. K. , 1978, “ Calculating Cam Profiles Quickly,” Mach. Des., 50(28), pp. 151–155.
Wu, L. I. , 2003, “ Calculating Conjugate Cam Profiles by Vector Equations,” Proc. Inst. Mech. Eng., Part C, 217(10), pp. 1117–1123. [CrossRef]
Rees-Jones, J. , 1978, “ Mechanisms, Cam Curvature and Interference,” Engineering, 218(5), pp. 460–463.
Lee, T. M. , Lee, D. Y. , Lee, H. C. , and Yang, M. Y. , 2009, “ Design of Cam-Type Transfer Unit Assisted With Conjugate Cam and Torque Control Cam,” Mech. Mach. Theory, 44(6), pp. 1144–1155. [CrossRef]
Collins, J. A. , 2003, Mechanical Design of Machine Elements and Machines, Wiley, New York.
Dhande, S. G. , and Rajaram, N. , 1984, “ Kinematic Analysis of Constant-Breadth Cam-Follower Mechanisms,” Trans. ASME., 106(2), pp. 214–221.
Ye, Z. , and Smith, M. R. , 2002, “ Synthesis of Constant-Breadth Cam Mechanisms,” Mech. Mach. Theory, 37(9), pp. 941–953. [CrossRef]
Zayas, E. E. , Cardona, S. , and Jordi, L. , 2009, “ Analysis and Synthesis of the Displacement Function of the Follower in Constant-Breadth Cam Mechanisms,” Mech. Mach. Theory, 44(10), pp. 1938–1949. [CrossRef]
Reeve, J. , 1995, Cams for Industry, Mechanical Engineering Publications, London.

Figures

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Fig. 1

Positive-drive cam mechanisms with a translating follower having dual concave faces

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Fig. 2

Positive-drive cam mechanisms with a translating follower having dual concave faces and its instant centers

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Fig. 3

Force analysis of a dual-concave-faced follower

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Fig. 4

The motion curves of the follower

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Fig. 5

Contours of three cams with different dual-faced followers

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Fig. 6

Pressure angles of three cams with different dual-faced followers

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Fig. 7

Radii of curvature of three different cam contours

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Fig. 8

Normal contact forces of three different cam mechanisms

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Fig. 9

Contact stresses of three different cam mechanisms

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Fig. 10

Forces normal to the follower stem of three different cam mechanisms

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