A metal strip rolling mill installation comprising a rolling mill (L), having a roll stand and a set of rolls, inside the stand, having:
- an upper group (GS) comprising:
- one work roll (12), upper
- two first intermediate rolls (13), upper
- three second intermediate rolls (14, 15), upper
- four sets of backup rollers (A, B, C, D), upper
- a lower group (GI) comprising:
- one work roll (12), lower:
- two first intermediate rolls, (13), lower,
- three second intermediate rolls (14,15),lower,
- four sets of backup rollers (H, G, F, E), lower,
- said installation comprising a robotic system (1) suitable for carrying out the operations of changing the rolls of the rolling mill, by extracting the worn rolls from the roll stand and/or inserting new or rectified rolls into the roll stand, comprising a robot provided with a grasping system (6) configured to control the locking of plurality of gripping tools, wherein said installation comprises a gripping tool change magazine (MAG) comprising, in a storage area:
- a first grasping tool (OT1) configured for inserting and extracting a work roll,
- a second grasping tool (OT2), configured for inserting and extracting first intermediate rolls,
- a third grasping tool (OT3), configured for inserting and extracting second intermediate rolls and
- a fourth grasping tool (OT4), configured for inserting and extracting sets of backup rollers, and wherein the grasping system (6) comprises a quick-coupling system (7), comprising a first mechanical coupling part (71), motorised (M7), configured to move from a coupled position configured to mechanically lock a second mechanical coupling part (72), to an uncoupled position allowing the release of the second mechanical coupling part,
- and wherein each of the gripping tools out of the first grasping tool (OT1), the second grasping tool (OT2), the third grasping tool (OT3) and the fourth grasping tool (OT4) are provided with said second mechanical coupling part (72), the gripping tools configured to be selectively coupled to said first mechanical part (71) of the grasping system (6) when the gripping tools are stored in said storage area of said tool change magazine (MAG).