Roll rearrangement device and roll rearrangement method

Abstract

A roll rearrangement device 100 includes a carriage 110 that can travel in the axial directions of a second intermediate roll 4 and a backup roll 5 provided in a multi-high rolling mill 200, a support beam 130 that is provided so as to be movable with the travelling of the carriage 110 and taken in and out of the multi-high rolling mill 200, and two roll holding sections that are provided with an interval in the axial direction of the support beam 130 and can attach and detach the second intermediate roll 4 and the backup roll 5. This makes it possible to provide a roll rearrangement device and a roll rearrangement method that can improve the safety of rearrangement work as compared with conventional ones by realizing parallel insertion and extraction of rolls during roll rearrangement.

What is claimed is: 
     
         1 . A roll rearrangement device comprising:
 a carriage capable of travelling in an axial direction of a roll provided in a rolling mill;   a support beam that is provided so as to be movable with travelling of the carriage and taken in and out of the rolling mill; and   two roll holding sections that are provided with an interval in the axial direction of the support beam and are capable of attaching and detaching the roll.   
     
     
         2 . The roll rearrangement device according to  claim 1 , further comprising:
 an axial direction position adjustment section that adjusts an axial direction position of each of the roll holding sections in the axial direction.   
     
     
         3 . The roll rearrangement device according to  claim 1 , wherein
 the roll holding sections further have an attachable and detachable hook that holds a neck of the roll from a lower side.   
     
     
         4 . The roll rearrangement device according to  claim 3 , further comprising:
 a perpendicular direction position adjustment section that adjusts a position of each of the roll holding sections in a perpendicular direction; and   an orthogonal direction position adjustment section that adjusts a position of each of the roll holding sections in an orthogonal direction relative to the axial direction and the perpendicular direction, wherein   the hook has
 an inner circumferential part that gets contact with part of outer circumference of the neck, 
 a rotation part that rotates the inner circumferential part in a circumferential direction, and 
 a stopper that stops rotation of the rotation part in the circumferential direction when the inner circumferential part has been fitted to the neck. 
   
     
     
         5 . The roll rearrangement device according to  claim 3 , further comprising:
 a perpendicular direction position adjustment section that adjusts a position of each of the roll holding sections in a perpendicular direction; and   an orthogonal direction position adjustment section that adjusts a position of each of the roll holding sections in an orthogonal direction relative to the axial direction and the perpendicular direction, wherein   the hook has an anti-tumbling mechanism for the roll.   
     
     
         6 . The roll rearrangement device according to  claim 1 , wherein
 the roll holding sections are configured to be attachable and detachable to and from the support beam.   
     
     
         7 . The roll rearrangement device according to  claim 1 , further comprising:
 a header holding section that is configured to be attachable and detachable to and from the support beam and is capable of attaching and detaching a pair of upper and lower coolant spray headers for spraying a coolant onto a front surface and a back surface of a metal strip rolled by the rolling mill, wherein   the header holding section has an upper fixing section that fixes, at an upper part, the upper coolant spray header to be attached or detached and a lower fixing section that fixes, at a lower part, the lower coolant spray header to be attached or detached.   
     
     
         8 . A roll rearrangement method comprising:
 equipping a carriage capable of travelling in axial directions of rolls provided in a rolling mill with a support beam that is taken in and out of the rolling mill, and with two roll holding sections that are provided with an interval in the axial direction of the support beam and are capable of attaching and detaching the roll;   inserting the roll holding sections into inside of the rolling mill by the support beam and holding a replacement target roll to draw the replacement target roll from the rolling mill; and   inserting the support beam into the inside of the rolling mill in a state in which a roll for replacement is held by the roll holding sections, and attaching the roll for replacement to the rolling mill.   
     
     
         9 . The roll rearrangement method according to  claim 8 , wherein
 when the rolling mill is a multi-high rolling mill that is a 20-high rolling mill,   the rolls are drawn in order of upper second intermediate rolls, lower second intermediate rolls, lower backup roll F-shaft and G-shaft, lower backup roll E-shaft and H-shaft, upper backup roll B-shaft and C-shaft, and upper backup roll A-shaft and D-shaft.   
     
     
         10 . The roll rearrangement method according to  claim 8 , wherein
 a coolant spray header is drawn before the replacement target roll is drawn.   
     
     
         11 . The roll rearrangement method according to  claim 8 , wherein,
 when the rolling mill is a multi-high rolling mill that is a 20-high rolling mill,   the rolls are attached in order of upper backup roll A-shaft and D-shaft, upper backup roll B-shaft and C-shaft, lower backup roll E-shaft and H-shaft, lower backup roll F-shaft and G-shaft, lower second intermediate rolls, and upper second intermediate rolls.   
     
     
         12 . The roll rearrangement method according to  claim 11 , wherein
 a coolant spray header is attached after all of the rolls for replacement are attached.