A roller stand (1) that has a roller stand frame (3) in which working rollers (4, 5), or working rollers (4, 5) and support rollers (8, 9), or working rollers (4, 5), intermediate rollers (10, 11), and support rollers (8, 9) are mounted. Each roller (4, 5, 8, 9, 10, 11) can be rotated about a respective rotational axis (6, 7). In a roller stand (1) without intermediate rollers (10, 11), the working rollers (4, 5) can be moved relative to one another in the direction of the respective rotational axis (6, 7), i.e. axially. In a roller stand (1) with intermediate rollers (10, 11), the same applies to the working rollers (4, 5) or the intermediate rollers (10, 11). Each of the axially movable rollers (4, 5 or 10, 11) has an effective barrel length (L) and a curved contour (R1, R2) which extends over the entire effective barrel length (L). Each of the axially movable rollers (4, 5 or 10, 11) has a contour (R1, R2) made by superimposing a respective base function (B1, B2) with a respective additional function (Z1, Z2). The base functions (B1, B2) and the additional functions (Z1, Z2) are functions of the location (x) in the direction of the respective rotational axis (6, 7). The base functions (B1, B2) are determined so as to complement each other in a specified relative axial position in an unloaded state of the axially movable rollers (4, 5 or 10, 11) and form a convex or concave roller gap profile depending on a movement direction upon being moved from the axial position. The sum of the additional functions (Z1, Z2) is a symmetrical function, which is monotonous on both sides, with respect to the barrel center of the axially movable rollers (4, 5 or 10, 11) in the unmoved state.

A cold rolling method, cold rolling equipment, and a cold-rolled steel sheet manufacturing method capable of preventing sheet breakage by sufficiently suppressing occurrence of an edge crack of a material to be rolled during cold rolling. In the cold rolling method, a rolling mill including a plurality of stands to cold-rolls a material to be rolled. An N-th stand (N is a natural number equal to or greater than 2) arranged in an N-th position from an upstream side of the material to be rolled in a transfer direction among the plurality of stands, includes a tapered work roll having a taper formed on an end portion of a roll having a uniform diameter. The N-th stand rolls the material to be rolled with a linear load of 0.8 t/mm or more.

A method ascertains control variables for active profile and flatness control elements for at least one rolling stand for hot rolling metal strip with a plurality of i=1 . . . I successive passes and for ascertaining profile and center flatness values for the hot-rolled metal strip. The occurrence of fluctuations in the center flatness of the metal strip after the individual passes and the resulting disadvantages for the rolling stability and the product quality are prevented. The method provides that, also for the target center flatness of the metal strip after a predetermined pass k with i=1 . . . <k< . . . I and for the target center flatness after the subsequent passes, pass-specific interval ranges are also specified in each case, and in that the successive calculation of the control variables and profile values is then carried out taking into account such additional specifications as well.

The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than $\frac{r}{\tan \left(\right)}$
and r indicates the wear of the running surface (8) in the radial direction (R) and indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

A rolling mill includes: work rolls configured to roll a rolling material; intermediate rolls supporting the work rolls from above and below, respectively; back-up rolls supporting the intermediate rolls from above and below, respectively; position adjusting means for adjusting the positions of the intermediate rolls relative to the work rolls and the back-up rolls in the direction of conveyance of the rolling material; detecting means for detecting horizontal forces on the work rolls; offset-amount calculating means for calculating the offset amounts of the intermediate rolls based on the horizontal forces on the work rolls detected by the detecting means; and controlling means for controlling the position adjusting means such that the positions of the intermediate rolls are offset by the offset amounts calculated by the offset-amount calculating means.

The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than ?r/tan(?) and ?r indicates the wear of the running surface (8) in the radial direction (R) and ? indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).

A roller stand (1) that has a roller stand frame (3) in which working rollers (4, 5), or working rollers (4, 5) and support rollers (8, 9), or working rollers (4, 5), intermediate rollers (10, 11), and support rollers (8, 9) are mounted. Each roller (4, 5, 8, 9, 10, 11) can be rotated about a respective rotational axis (6, 7). In a roller stand (1) without intermediate rollers (10, 11), the working rollers (4, 5) can be moved relative to one another in the direction of the respective rotational axis (6, 7), i.e. axially. In a roller stand (1) with intermediate rollers (10, 11), the same applies to the working rollers (4, 5) or the intermediate rollers (10, 11). Each of the axially movable rollers (4, 5 or 10, 11) has an effective barrel length (L) and a curved contour (R1, R2) which extends over the entire effective barrel length (L). Each of the axially movable rollers (4, 5 or 10, 11) has a contour (R1, R2) made by superimposing a respective base function (B1, B2) with a respective additional function (Z1, Z2). The base functions (B1, B2) and the additional functions (Z1, Z2) are functions of the location (x) in the direction of the respective rotational axis (6, 7). The base functions (B1, B2) are determined so as to complement each other in a specified relative axial position in an unloaded state of the axially movable rollers (4, 5 or 10, 11) and form a convex or concave roller gap profile depending on a movement direction upon being moved from the axial position. The sum of the additional functions (Z1, Z2) is a symmetrical function, which is monotonous on both sides, with respect to the barrel center of the axially movable rollers (4, 5 or 10, 11) in the unmoved state.

A control device of a rolling mill includes first and second angle instruction sections that issue a first instruction to adjust an angle between an upper side pair and a lower side pair in a state in which the upper side pair has a parallel state and in a state in which the lower side pair has a parallel state; and a second instruction to tilt work rolls in a state in which an angle between backup rolls is maintained. An axial position instruction is issued to move the work rolls in a direction in which total thrust force received, by the work rolls tilted by the second instruction, from the backup rolls and a rolled material acts. The work roll pressing devices, work roll fixed position controlling devices, and shift cylinders are controlled on the basis of the first and second instructions, and the axial position instruction.

The invention concerns a 4-high/6-high/18 HS cassette-type roll stand in which bending force is transmitted to bending journals (6) of roll inserts (7) by piston-cylinder units that are connected with Mae West blocks (3). Here, the piston at the piston rod (1) is fixedly connected with the Mae West block (3) and the cylinders (4) fit around the bending journals (6) at the inserts (7) of the rolls, so that thereby bending force can be transmitted directly to the bending journals (6) of the roll inserts (7).

The present invention relates to a method and an apparatus for changing the effective contour of a running surface (8) of a working roller (3, 4) during the hot rolling of rolling stock in a roll stand (2) to form a rolled strip (1). The intention is to be able to change the contour of the running surface (8) during the hot rolling by means of the invention. This object is achieved according to the invention by the axial displacement of the working rollers (3, 4) in opposite directions by a displacement distance s, wherein s is greater or less than r/tan()and r indicates the wear of the running surface (8) in the radial direction (R) and indicates the pitch angle of the conical portion (7) of the respective working roller (3, 4).