Multi-high rolling mill

Abstract

In the multi-high rolling mill according to the present invention, a pair of upper and lower work rolls for rolling material W is disposed; two upper first intermediate rolls and two lower first intermediate rolls are disposed outside the upper and lower work rolls respectively so as to contact with the work rolls; three upper rolls and three lower rolls are disposed outside the upper and lower first intermediate rolls respectively to contact with the first intermediate rolls. A second intermediate roll that is a center roll of the three rolls is functioned as a drive roll, and two rolls of the three rolls at both sides are functioned as first back-up rolls for supporting the first intermediate rolls. At least one upper second back-up roll and at least one lower second back-up roll are disposed outside the upper and lower second intermediate rolls respectively to support the second intermediate rolls. According to such a structure, both productivity and satisfactory shape controllability can be attained in the multi-high rolling mill.

1 . A multi-high rolling mill, comprising:
 a pair of upper and lower work rolls for rolling material;   two upper first intermediate rolls and two lower first intermediate rolls, disposed outside said upper and lower work rolls respectively so as to contact with said work rolls;   three upper rolls and three lower rolls, disposed outside said upper and lower first intermediate rolls respectively to contact with said first intermediate rolls, a center roll of said three rolls being a second intermediate roll as a drive roll, and two rolls of said three rolls at both sides being first back-up rolls for supporting said first intermediate rolls; and   one or more upper second back-up rolls and one or more lower second back-up rolls, disposed outside said upper and lower second intermediate rolls respectively to support said second intermediate rolls.   
     
     
         2 . The multi-high rolling mill according to  claim 1 , constituted as a 16-high structure by providing two of said upper second back-up rolls and two of said lower second back-up rolls outside said upper and lower second intermediate rolls respectively. 
     
     
         3 . The multi-high rolling mill according to  claim 1 , constituted as a 14-high structure by providing one of said upper second back-up roll and one of said lower second back-up roll outside said upper and lower second intermediate rolls respectively. 
     
     
         4 . The multi-high rolling mill according to  claim 1 , constituted to perform shape control of crown control with said first back-up rolls. 
     
     
         5 . The multi-high rolling mill according to  claim 1 , wherein said first intermediate rolls are larger in diameter than said work rolls, and said second intermediate rolls and said first back-up rolls are larger in diameter than said first intermediate rolls.