Assessment and improvement of elementary force computations for cold forward rod extrusion
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Date
2005
Authors
Tekkaya, Ahmet Eeman
Egemen,M.
Tekkaya,A.E.
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Volume Title
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.
Description
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
WoS Q
Q2
Scopus Q
Q1
Source
Arabian Journal for Science and Engineering
Volume
30
Issue
1 C
Start Page
83
End Page
102