A method for the stepped rolling of a metal strip unwinds the metal strip by a feed reel device and winds-up the metal strip by a winding reel device. The metal strip is guided through a roller gap formed between two working rollers during the rolling process, and the roller gap is changed in a controlled manner during the rolling process, whereby a thickness of the metal strip is changed in steps in the longitudinal direction during the rolling process. Tension applied to the metal strip is controlled such that the rolling force applied to the metal strip by the working rollers is constant during the rolling process.

Disclosed is a rolling method for a board having various longitudinal thicknesses, comprising the following steps: 1) setting a number N of uniform-thickness segments of a sample, thicknesses h.sub.1, h.sub.2, . . . , h.sub.N of the uniform-thickness segments, lengths L.sub.1, L.sub.2, . . . , L.sub.N of the uniform-thickness segments, and lengths T.sub.1, T.sub.2, . . . , T.sub.N1 of transitional segments between the uniform-thickness segments, the N uniform-thickness segments having N1 transitional segments therebetween, and both the thickness and length having a unit of mm; 2) selecting a raw material; 3) setting a rolling force, a roll gap and a rolling period of time for each segment; 4) preparing rolling; 5) conducting rolling; 6) optimizing rolling parameters, measuring thicknesses and lengths of the uniform-thickness segments and lengths of the transitional segments after the rolling member is rolled; comparing the measured thicknesses of the uniform-thickness segments with the set thicknesses for the sample, so as to correct the rolling force P.sub.i and roll gap G.sub.i set for each segment in step 3); comparing the measured lengths with the positions marked in step 4), so as to correct the rolling period of time set for each segment in step 3); repeating steps 4) and 5) using raw materials of the same size, and making correction again, wherein a rolled member meeting the requirements of the sample can be made after 2-3 times of trial rolling. This method avoids preparation of a raw material in the form of a roll, avoids study on a complex controlling method for various-thickness rolling of the roll, and saves the raw material and test time.

Disclosed is a rolling method for a board having various longitudinal thicknesses, comprising the following steps: 1) setting a number N of uniform-thickness segments of a sample, thicknesses h.sub.1, h.sub.2, . . . , h.sub.N of the uniform-thickness segments, lengths L.sub.1, L.sub.2, . . . , L.sub.N of the uniform-thickness segments, and lengths T.sub.1, T.sub.2, . . . , T.sub.N1 of transitional segments between the uniform-thickness segments, the N uniform-thickness segments having N1 transitional segments therebetween, and both the thickness and length having a unit of mm; 2) selecting a raw material; 3) setting a rolling force, a roll gap and a rolling period of time for each segment; 4) preparing rolling; 5) conducting rolling; 6) optimizing rolling parameters, measuring thicknesses and lengths of the uniform-thickness segments and lengths of the transitional segments after the rolling member is rolled; comparing the measured thicknesses of the uniform-thickness segments with the set thicknesses for the sample, so as to correct the rolling force P.sub.i and roll gap G.sub.i set for each segment in step 3); comparing the measured lengths with the positions marked in step 4), so as to correct the rolling period of time set for each segment in step 3); repeating steps 4) and 5) using raw materials of the same size, and making correction again, wherein a rolled member meeting the requirements of the sample can be made after 2-3 times of trial rolling. This method avoids preparation of a raw material in the form of a roll, avoids study on a complex controlling method for various-thickness rolling of the roll, and saves the raw material and test time.

A process includes flexible rolling of a strip made of a metallic material, wherein a thickness profile with different sheet thicknesses along the length of the strip is produced such that successive regions of the flexibly rolled strip each correspond to a target thickness profile of a sheet metal blank to be cut out of same; determining a measured thickness profile of a plurality of successive regions of the strip; calculating a target position in the strip for a sheet metal blank to be cut out of the strip depending on the generated measured thickness profile of at least two successive regions of the strip; cutting the flexibly rolled strip by at least one cutting device along the target position for producing the sheet meal blank. A plant is further provided for producing a sheet metal blank.

A plurality of flat metal items to be rolled (3) are fed to a plurality of rolling stands (1, 2) of a rolling installation, one after the other over a feed path (4). The items (3) are rolled by the rolling stands (1, 2) past which they are fed. In the rolling stands (1, 2), the flat item to be rolled (3) is first rough-rolled in at least one roughing pass with a wedge-type roll gap adjustment (ds) and then finish-rolled in finishing passes. After the finish-rolling of the flat item, a thickness taper (dd) that is present in the respective finish-rolled flat item is recorded by measuring instruments. The thickness taper (dd) is compared with a target taper (dZ). On the basis of a deviation of the thickness taper (dd) from the target taper (dZ) and the wedge-type roll gap adjustment (ds), a new wedge-type roll gap adjustment (ds) is determined for the at least one roughing pass. The wedge-type roll gap adjustment (ds) for the at least one roughing pass for the next flat item to be rolled (3) is set to correspond to the newly determined value of the wedge-type roll gap adjustment (ds), so that the next flat item to be rolled (3) is rough-rolled in the at least one roughing pass with the newly determined value of the wedge-type roll gap adjustment (ds).