Cluster mill, in particular, a six-high cluster mill, comprising an axial displacement and holding device for displaceably mounted intermediates rolls and or working rolls
View Patent ↗A cluster mill includes an axially displacing and holding device for displaceable intermediate and/or working mills ( 11 ), with the chocks ( 7 ) being guided in a sliding manner inside the cluster mill stand housing posts ( 1 ), the rolls ( 11 ) are be displaced in axially opposite directions by piston-cylinder units ( 5 ), and the piston rods ( 5 a ) are pivotally connected to a main traverse ( 4 ). In order to prevent the main traverse ( 4 ) from becoming damaged by non-uniform action of the piston-cylinder units ( 5 ) during displacement, there are provided moving beams ( 1 a ), which are located on both sides of the chock ( 7 ) and are mounted inside the cluster mill stand housing posts ( 1 ) via the connecting traverses ( 2 ), the connecting traverses ( 2 ) being pivotally connected to the middle of the main traverse ( 4 ), whereby the piston rods ( 5 a ) of the piston-cylinder units ( 5 ) are pivotally connected to opposite ends ( 4 a, 4 b ) of the main traverse ( 4 ), and each piston-cylinder unit ( 5 ) is controlled according to path by a displacement sensor ( 10 ).
1. A cluster mill, in particular a six-high cluster mill, comprising an axial displacing and holding device for displaceably supported intermediate rolls and/or working rolls, wherein chocks are slidably displaced in rolling mill stands in a direction of a roll separating force, and wherein the intermediate rolls and/or working rolls, together with their respective chocks, are displaceable in axial opposite directions by hydraulic piston-cylinder units acting in a direction of roll axes, with both piston rods being pivotally connected by a respective main traverse,
characterized in that
moving beams ( 1 a ), which are arranged on opposite sides of the roll chock ( 7 ), are supported in a rolling mill stand housing post ( 1 ) by a respective connecting traverse ( 2 ), that the connecting traverses ( 2 ) are pivotally connected to the middle of the main traverse ( 4 ), wherein the piston rods ( 5 a ) of the piston-cylinder units ( 5 ) are pivotally connected to ends ( 4 a , 4 b ) of the main traverse ( 4 ), and wherein each piston-cylinder unit ( 5 ) is controlled according to path by a displacement sensor ( 10 ).
2. A cluster mill according to claim 1 ,
characterized in that
on a drive side, between the moving beams ( 1 a ), in the roll chock ( 7 ), a locking block ( 8 ) for locking the roll ( 11 ) is arranged.
3. A cluster mill according to claim 2 ,
characterized in that
a tightening member ( 9 ) connects the roll chock ( 7 ) with the locking block ( 8 ).
4. A cluster mill according to claim 2 ,
characterized in that
the connecting traverse ( 2 ) is connected with the locking block ( 8 ) by an axially acting, tightening disc ( 12 ) arranged in an interior of the connecting traverse ( 2 ) in the middle thereof.
5. A cluster mill according to claim 4 ,
characterized in that
the tightening disc ( 12 ) is operated by a hydraulic tightening device ( 9 a ).
6. A cluster mill according to claim 1 ,
characterized in that
a length of the displacement path ( 13 ) is calculated as a mean value of two displacement paths ( 13 ) determined by associated displacement sensors ( 10 ).
7. A cluster mill according to claim 6 ,
characterized in that
the calculated mean value of the displacement paths ( 13 ), which was determined by the two displacement sensor ( 10 ), is communicated to respective automatic control circuits of the piston-cylinder units ( 5 ).