Dual-stage multi-roll leveler and metal strip material flattening method
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United States of America Patent
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Dec 5, 2023
Grant Date -
Nov 19, 2020
app pub date -
Jul 13, 2020
filing date -
Dec 21, 2016
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Abstract
Dual-stage multi-roll leveler embodiments of the general inventive concept include independent sets of first stage work rolls and second stage work rolls, with each set of work rolls including one or more upper work rolls disposed above one or more lower work rolls. An adjustable but equal entry side-to-exit side gap is present between the upper and lower work rolls of each work roll set. An exemplary dual-stage leveler removes shape defects and coil set and/or curl from a moving strip material through a combination of work roll gap adjustment and first and/or second stage work roll bending. Because there is no feathering out of work roll penetration in either stage, differential roll speed and the problems associated therewith are eliminated.
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