US 12,440,878 B2
Reduction of surface defects during finish rolling of hot strip
Heinz Fürst, Gallneukirchen (AT); Franz Hermann Glaser, Haid bei Ansfelden (AT); Simon Grosseiber, Leonding (AT); Slaven Ilic, Linz (AT); Lukas Preuler, Randegg (AT); Juergen Schiefer, Allhaming (AT); and Christian Strasser, Linz (AT)
Assigned to Primetals Technologies Austria GmbH, Linz (AT)
Filed by Primetals Technologies Austria GmbH, Linz (AT)
Filed on Dec. 14, 2022, as Appl. No. 18/081,517.
Claims priority of application No. 22151963 (EP), filed on Jan. 18, 2022.
Prior Publication US 2023/0226584 A1, Jul. 20, 2023
Int. Cl. B21B 45/02 (2006.01); B21B 1/22 (2006.01); B21B 1/26 (2006.01); B21B 13/22 (2006.01); B21B 27/10 (2006.01); B21B 28/02 (2006.01); B21B 45/00 (2006.01)
CPC B21B 13/22 (2013.01) [B21B 1/227 (2013.01); B21B 1/26 (2013.01); B21B 27/10 (2013.01); B21B 28/02 (2013.01); B21B 45/004 (2013.01); B21B 2027/103 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A finishing train for finish rolling hot strip, comprising:
a plurality of roll stands, the roll stands each having a lower and an upper working roll and the working rolls each form a roll gap, the hot strip configured to pass through the roll gaps in a transport direction during finish rolling;
a plurality of cooling nozzles arranged below a pass line, the cooling nozzles configured to spray a liquid cooling medium onto a lateral surface during the finish rolling to cool at least one exit-side region of the lateral surface of the lower working roll of the last roll stand in the transport direction;
at least one stripper arranged vertically between the cooling nozzles and the hot strip, the at least one stripper configured to keep the cooling medium away from the hot strip, the at least one stripper being secured on an exit table; and
at least one cleaning nozzle configured to clean an upper side of the exit table to remove at least one of scale and rolling dust.