US 11,872,612 B2
Multistage rolling mill
Takashi Norikura, Tokyo (JP)
Assigned to SENDZIMIR JAPAN, LTD., Tokyo (JP)
Appl. No. 17/600,130
Filed by SENDZIMIR JAPAN, LTD., Tokyo (JP)
PCT Filed Apr. 1, 2020, PCT No. PCT/JP2020/015023
§ 371(c)(1), (2) Date Sep. 30, 2021,
PCT Pub. No. WO2020/204070, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-072179 (JP), filed on Apr. 4, 2019.
Prior Publication US 2022/0168790 A1, Jun. 2, 2022
Int. Cl. B21B 13/14 (2006.01); B21B 31/18 (2006.01); B21B 37/38 (2006.01); B21B 13/16 (2006.01); B21B 31/20 (2006.01); B21B 27/10 (2006.01)
CPC B21B 13/14 (2013.01) [B21B 31/18 (2013.01); B21B 37/38 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A multistage rolling mill comprising:
a pair of work rolls rolling a metal strip;
a pair of intermediate rolls supporting the work rolls;
a pair of back-up rolls supporting the intermediate rolls;
a first support roll group or support bearings arranged on an entry side and/or an exit side of the work rolls, the first support roll group or the support bearings supporting the work rolls on an work side and a drive side; and
a coolant spray header and/or a cobble guard disposed in a strip width direction central portion of the metal strip,
wherein the intermediate rolls have tapered shaped roll shoulders in a direction of a vertical point symmetry, and have shift devices shifting the intermediate rolls in a roll axis direction, and
wherein offset positions in a pass direction of at least either the work rolls or the intermediate rolls are changed by moving in and out at least either the first support roll group or the support bearings or chocks of the intermediate rolls to the entry side or the exit side with respect to the pass direction.