Improved Algorithm for Tolerance-Based Stiffness Optimization of Machining Fixtures

[+] Author and Article Information
José F. Hurtado, Shreyes N. Melkote

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Manuf. Sci. Eng 123(4), 720-730 (May 01, 2001) (11 pages) doi:10.1115/1.1403446 History: Received March 01, 2000; Revised May 01, 2001
Copyright © 2001 by ASME
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Pin-array type flexible fixtures: (left) flexible workpiece support for automatic machining lines (U.S. Patent 4,936,560), (right) flexible tooling apparatus (U.S. Patent 5,722,646)
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(a) Pin-array type locators and clamps (b) equivalent locators and reaction forces (c) fixture stiffness model-Example 1
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(a) Hydraulic clamp (b) model of the clamp normal stiffness
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Stiffness optimization flowchart
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Rigid body motion of the workpiece
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Design variables of the array of pins
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Top view of a 4-2-1 dedicated machining fixture-Example 2
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Equivalent locators, contact and machining forces acting on the workpiece-Example 2




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