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Research of oil film thickness model and surface quality in cold rolling copper foil
Author(s) -
Sun Jianlin,
Liu Nana,
Xia Lei,
Wu Di
Publication year - 2014
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1231
Subject(s) - copper , materials science , foil method , metallurgy , surface (topology) , composite material , geometry , mathematics
Rolled copper foil is widely used in high frequency and speed transmission of fine line printed circuit board, because of its high strength, good toughness and high density. In this paper, a theoretical model for copper foil rolling in mixed lubrication regime was developed on the basis of the average volume flow model and asperity flattening model. A more accurate relation for the variation of the lubricant viscosity with pressure and temperature was considered. The cold rolled copper foil experiment was carried on with different viscosity of rolling oil and pass reduction. The effects of rolling oil viscosity and pass reduction on lubricant pressure, contact area ratio and film thickness ratio were studied. The calculation results agree well with the measured data from copper foil rolling experiment. For obtaining higher surface quality, the rolling oil viscosity is about 10 mm 2 /s, and the pass reduction is about 30%. Copyright © 2013 John Wiley & Sons, Ltd.