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Cited 10 time in webofscience Cited 13 time in scopus
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Effect of Friction conditions on Material Flow in FE Analysis of Al Piston Forging Process

Authors
Lee, Seong-WonJo, Jae-WanJoun, Man-SooLee, Jung-Min
Issue Date
Oct-2019
Publisher
KOREAN SOC PRECISION ENG
Keywords
Aluminum forged piston; FE analysis; Friction condition; Material flow
Citation
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v.20, no.10, pp 1643 - 1652
Pages
10
Indexed
SCIE
SCOPUS
KCI
Journal Title
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
Volume
20
Number
10
Start Page
1643
End Page
1652
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/8677
DOI
10.1007/s12541-019-00189-8
ISSN
2234-7593
2005-4602
Abstract
In the hot forging process of aluminum piston using water-soluble lubricants, the lubricant layer is often peeled off due to excessive deformation of the material during forming, which may result in direct contact between the material and the die, thereby partially increasing the friction. The constant friction in the Finite element (FE) analysis of this process sometimes results in a completely different result from the actual material flow. Therefore, this study was designed to investigate the friction condition to accurately predict the material flow in the FE analysis. The FE analysis was performed for various material temperatures and friction parameters and the proper friction condition was also derived to remove forging defects. Finally, the forging test was carried out for the initial specimens produced by three different methods to verify the analytical results and eliminate the forging defects. The results showed that the friction depends on the effective strain in the FE analysis and the critical value to increase friction is approximately 1.5-1.8. In addition, among the three different specimens, the shot peened specimen can remove the forging defect by increasing the amount and uniformity of the lubricant on its surface.
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