Hot rolling thin strip
AssigneeCastrip, LLC
InventorsHeiji Kato, Michael Angel Lopez, John Albert Ziegelaar
Life of this patent
Estimating the term…
Abstract
A thin steel strip is passed through a pinch roll stand comprising pinch rolls to a hot rolling mill comprising work rolls and backing rolls. In advance of rolling mill, the strip passes over support rolls. An anti-crimping guide roll located immediately in advance of the rolling mill is mounted on a pair of rocker structures so as to be rasiable from a lower inoperative position to lift the strip out of a straight line path so as to pass around the anti-crimping roll and to be wrapped about the upper work roll, that roll supports the strip and resists buckling of the strip and the generation of crimping defects.
Claims17
In a method of producing thin steel strip by continuous casting in a twin-roll strip caster to a thickness of 5 mm or less and reducing the thickness in an in-line hot rolling mill as it is produced by the caster through a nip between a pair of work rolls of the rolling mill, the improvement comprising the steps of:
- passing the cast strip in advance of the work rolls around a guide roll which causes the strip to be wrapped onto one of the work rolls in advance of its entry into the nip between the work rolls, and
- reducing strip defects arising during hot rolling due to backwards slipping of the central portion of the strip relative to the edges caused by variation in strip reduction across the width of the strip.
An apparatus for producing thin steel strip the apparatus comprising a twin roll strip caster operable to continuously cast steel strip to a thickness of 5 mm or less and a hot rolling mill installed in-line with the strip caster and operable to reduce the thickness of the strip by hot rolling the strip the rolling mill comprising a pair of work rolls defining a nip between them to receive the strip as it is produced by the caster, the improvement comprising:
- a bias unit configured to apply squeezing forces between the work rolls, and
- a guide roll to guide the strip to the nip between the work rolls such that the strip is wrapped onto one of the work rolls in advance of its entry into the nip between work rolls.
Dependencies are inferred from the claim text.