roll flattening

roll flattening

[′rōl ‚flat·ən·iŋ]
(geodesy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Besides, when the cold rolling mill begins to vibrate, the rolling force in the roll gap is extremely high, leading to the work roll flattening effect, which cannot be neglected because that may significantly reduce the estimate of the actual contact length between the work roll and the strip, then leads to an underestimation of the rolling force.
where R is original radius without working roll flattening effect, [f.sub.y] is the roll force per width, [DELTA]h is the screw down amount of work roll, [DELTA][h.sub.e] is the elastic feedback of the strip, [[upsilon].sub.1] is Poisson's ratio, and [E.sub.1] is Young's modulus of the roll material.