Fixture design is a critical step in machining. An important aspect of fixture design is the optimization of the fixture, the primary objective being the minimization of workpiece deflection by suitably varying the layout of fixture elements and the clamping forces. Previous methods for fixture design optimization have treated fixture layout and clamping force optimization independently and/or used nonlinear programming methods that yield sub-optimal solutions. This paper deals with application of the genetic algorithm (GA) for fixture layout and clamping force optimization for a compliant workpiece. An iterative algorithm that minimizes the workpiece elastic deformation for the entire cutting process by alternatively varying the fixture layout and clamping force is proposed. It is shown via an example of milling fixture design that this algorithm yields a design that is superior to the result obtained from either fixture layout or clamping force optimization alone.
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February 2002
Technical Papers
Iterative Fixture Layout and Clamping Force Optimization Using the Genetic Algorithm
Krishnakumar Kulankara,
Krishnakumar Kulankara
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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Srinath Satyanarayana,
Srinath Satyanarayana
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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Shreyes N. Melkote
Shreyes N. Melkote
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
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Krishnakumar Kulankara
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Srinath Satyanarayana
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Shreyes N. Melkote
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received July 2000; revised February 2001. Associate Editor: E. C. DeMeter.
J. Manuf. Sci. Eng. Feb 2002, 124(1): 119-125 (7 pages)
Published Online: February 1, 2001
Article history
Received:
July 1, 2000
Revised:
February 1, 2001
Citation
Kulankara , K., Satyanarayana , S., and Melkote, S. N. (February 1, 2001). "Iterative Fixture Layout and Clamping Force Optimization Using the Genetic Algorithm ." ASME. J. Manuf. Sci. Eng. February 2002; 124(1): 119–125. https://doi.org/10.1115/1.1414127
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