Active vibration damping system of a rolling mill
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsStefano Del Tedesco, Andrea De Luca
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Abstract
The active vibration damping system of a rolling mill comprises a rolling stand and an adjustment system for the bending of the rolling rolls (1, 1′) having hydraulic actuators (2\2″, 2″′, 2iv) acting on the chock (20) of the rolling rolls (1, 1′) and hydraulic feeding circuits (7, 9, 11, 12) and injectors (8′, 8″, 8″′, 8iv), preferably piezoelectric injectors, directly inserted into the chambers (6\6″, 6″′, 6iv) of the hydraulic actuators (2′, 2″, 2″′, 2iv) with the advantage of exploiting the dampening effect resulting from the high- pressure oil injection.
Claims7
An active vibration damping system for a rolling stand, comprising two or more working rolls with respective chocks, the damping system comprising:
- a plurality of hydraulic actuators having respective movable pistons, acting on said chocks, and respective bending chambers,
- a hydraulic circuit for feeding said plurality of hydraulic actuators,
- one or more injectors within said hydraulic circuit,
- wherein said one or more injectors are directly arranged within or in proximity of a structure of the respective bending chambers of the hydraulic actuators to actuate an active damping of vibrations of the working rolls, said injectors being adapted to inject pressurized oil into a respective bending chamber of the hydraulic actuators under control of an electronic control unit.
A rolling mill comprising
- at least one rolling stand provided with two or more working rolls with respective chocks,
- and an active vibration damping system comprising
- a plurality of hydraulic actuators having respective movable pistons, acting on said chocks, and respective bending chambers,
- a hydraulic circuit for feeding said plurality of hydraulic actuators,
- one or more injectors within said hydraulic circuit,
- wherein said one or more injectors are directly arranged within or in proximity of a structure of the respective bending chambers of the hydraulic actuators to actuate an active damping of vibrations of the working rolls, said injectors being adapted to inject pressurized oil into a respective bending chamber of the hydraulic actuators under control of an electronic control unit.
Dependencies are inferred from the claim text.