An Optimum Design of Cam Mechanisms with Roller Follower for Combined Effect of Impact and High Contact Loads

Authors

  • Fathi Al-Shamma Department of Mechanical Engineering/ College of Engineering/ University of Baghdad
  • Faiz F. Mustafa Department of Manufacturing Operation/ Al-Khwarrizmi College of Engineering/ University of Baghdad
  • Sahar M. Saliman Department of Manufacturing Operation/ Al-Khwarrizmi College of Engineering/ University of Baghdad

Abstract

     The problem in the design of a cam is the analyzing of the mechanisms and dynamic forces that effect on the family of parametric polynomials for describing the motion curve. In present method, two ways have been taken for optimization of the cam size, first the high dynamic loading (such that impact and elastic stress waves propagation) from marine machine tool which translate by the roller follower to the cam surface and varies with time causes large contact loads and second it must include the factors of kinematics features including the acceleration, velocity, boundary condition and the unsymmetrical curvature of the cam profile for the motion curve.

     In the theoretical solution the unidirectional impact stress waves with the Mushkelishvilis inverse of the singular integral equation for contact stress have been used for analytical solution and a numerical solution have bean solved using F.E.M (ANSYS 10) for stress analysis in a cam surface at condition of rise-dwell-return (R-D-R) motion of the follower, also to compare the analytical and numerical results that have been used different pressure angles in the rise and return of the motion curves in unsymmetrical cam profile for optimum design.

Downloads

Download data is not yet available.

References

[1] Ananthasuresh G. K, "Design of Fully, Rotatable, Roller-Crank-Driven Cam Mechanism for Arbitrary Motion Specifications" Mechanism and Machine Theory, 36: 445-467, 2001.
[2] Jesen P. W, "Cam Design and Manufacture" 1987, Marcel Dekker, New York and Basel.
[3] Lee M. K, "Design for Manufacturability of Speed-Reduction Cam Mechanisms" M. Eng. Thesis, Department of Mechanical Engineering, McGill University, Monterpal, 2001.
[4] Yoon K. and Rao S. S. "Cam Motion Synthesis Using Cubic Splines" ASME Journal of Mechanical Design, 115: 441-446, 1993.
[5] Yu Q. and Lee H. P. "A new Family of Parameterized Polynomial for Cam Synthesis" Trans ASME, J. Mech. Des. 1995, 117: 653-654.
[6] Khalil Sherafatnia "Vibration in Cam-Follower Systems" July 2007.
[7] Vasian Paradorn "An Impact Model for the Industrial Cam-Follower System: Simulation and Experiment" Thesis of Master Degree in Mech. Eng. Worcester Polytechnic Institute, October 11th , 2007.
[8] Jevzy Zajaczkowski "Application of Mathematical Methods to Designing a Cam-Driven Loom Batten " Fibres and Textiles in Eastern Europe, Vol. 13, No. 3, Page 70, 2005.
[9] "Valve Train Design and Calculation for High-Performance Engines" Advanced Engine Technology, 2009.
[10] Barken P. "Impact Design in Mechanical Design " Hand Book, H. Rothbart, Ed, McGraw-Hill, Chapter 31, New York, 1996.
[11] Jonas A. Zukas, Theodore Nicholas and Hallock F. Swift "Impact Dynamics" John Wiley and Sons, 1982.
[12] Mushkelishvili N.I. "Singular Integer Equation" Translated by J. R. M. Radok, 1977. Noordhoff International Publishing.
[13] Khadem, R. and Oconner,J. J. "Adhesive or Frictionless Compression of an Elastic Rectangular Between Two Identical Elastic Half-Spaces" Int. J. Eng. Sci., 1969, Vol. 7, Page 153-168.

Downloads

Published

2010-12-01

How to Cite

Al-Shamma, F., Mustafa, F. F., & Saliman, S. M. (2010). An Optimum Design of Cam Mechanisms with Roller Follower for Combined Effect of Impact and High Contact Loads. Al-Khwarizmi Engineering Journal, 6(4), 62–71. Retrieved from https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/513

Most read articles by the same author(s)