Assessment and Improvement of Elementary Force Computations for Cold Forward Rod Extrusion
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Date
2005
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Publisher
King Fahd University of Petroleum and Minerals
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Abstract
Two commonly used analytical force computation methods for cold forward rod extrusion are evaluated by means of precise finite element computations. The upper-bound model by Avitzur based on the spherical velocity field and the model by Siebel based on a quasi-upper-bound solution are considered. It has been found that the pure deformation forces obtained by summing the ideal force and shear force terms deviate between +25% and -20% from the finite element solutions. Larger deviations, however, occur for the Coulomb-friction term in the container. A new model based on an elasto-static analysis combined with numerical analysis is suggested to compute this term. This new model supplies also the accurate pressure distribution within the container.
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Keywords
Analytical Force Prediction, Cold Forging, Finite Element Method, Forward Rod Extrusion, Mechanical Engineering, Metal Forming
Turkish CoHE Thesis Center URL
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Citation
1
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Q2
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Q1
Source
Arabian Journal for Science and Engineering
Volume
30
Issue
1 C
Start Page
83
End Page
102