A roll stand having work rolls mounted therein. The roll stand has at least one upper mounting rail, which is mounted on the drive-side roll stand frame and oriented in a transverse direction to a rolling line running through the roll stand. In order to be able to keep the assembly space in the roll stand over the rolling line free during rolling—except for a roll change—and still change the roll efficiently, the upper mounting rail is configured to be moved into the rolling line and out of the rolling line, starting from the drive-side roll stand frame.

A roller leveler assembly has a first cassette having a first set of work rolls of a first diameter and work roll spacing and a second cassette having a second set of work rolls of a second diameter and work roll spacing. A drive mechanism selectively drives one of the first cassette of the first set of rolls and the second cassette of the second set of rolls. The drive mechanism has a first set of upper drive shafts and a second set of lower drive shafts and a drive shaft support assembly. The drive shaft support assembly has a first support shaft for supporting the first set of upper drive shafts and a second support shaft for supporting the second set of lower drive shafts. The first support shaft and second support shaft each has a first set of saddles and a second set of saddles for supporting the first set of upper drive shafts and the second set of lower drive shafts in first and second positions corresponding to the work roll center spacing of the first set of work rolls and the second set of work rolls, respectively.

A roller leveler assembly has a first cassette having a first set of work rolls of a first diameter and work roll spacing and a second cassette having a second set of work rolls of a second diameter and work roll spacing. A drive mechanism selectively drives one of the first cassette of the first set of rolls and the second cassette of the second set of rolls. The drive mechanism has a first set of upper drive shafts and a second set of lower drive shafts and a drive shaft support assembly. The drive shaft support assembly has a first support shaft for supporting the first set of upper drive shafts and a second support shaft for supporting the second set of lower drive shafts. The first support shaft and second support shaft each has a first set of saddles and a second set of saddles for supporting the first set of upper drive shafts and the second set of lower drive shafts in first and second positions corresponding to the work roll center spacing of the first set of work rolls and the second set of work rolls, respectively.

To minimize the setup times in the case of a tool changeover on rolls, the movement sequences are separated into transverse movements and vertical movements using a tool changeover system and method for changeover of at least one tool disposed on a roll shaft in a working position. In one aspect, the tool changeover system includes a tool changeover rack, a vertical transport and a transverse transport. A drawing frame separate from the tool changeover rack can be transported transversely separately with reference to the tool changeover rack. The tool changeover rack has a device for connecting with the vertical transport and a tool accommodation for accommodating the tool. The drawing frame has a device for connecting with the transverse transport and a device for connecting with the tool.

To minimize the setup times in the case of a tool changeover on rolls, the movement sequences are separated into transverse movements and vertical movements using a tool changeover system and method for changeover of at least one tool disposed on a roll shaft in a working position. In one aspect, the tool changeover system includes a tool changeover rack, a vertical transport and a transverse transport. A drawing frame separate from the tool changeover rack can be transported transversely separately with reference to the tool changeover rack. The tool changeover rack has a device for connecting with the vertical transport and a tool accommodation for accommodating the tool. The drawing frame has a device for connecting with the transverse transport and a device for connecting with the tool.

When changing product specifications in the existing longitudinal seam steel pipe production lines, manual operations on line are generally used to replace an entire set of rollers that need to be replaced while the production lines are shut down, or robots are used to replace rollers in a fully automatic manner, but the equipment for roller replacement by robot takes up a lot of space and is expensive. The present implementations provide a three-dimensional quick replacement machine for a production line, which completes the entire operation of specification change by providing a first unit, a second unit, a three-dimensional frame, a forming base, and a switching device, the switching device drives the first or second unit to move up and down in the three-dimensional frame, and the first and second units are alternately installed on the forming base to achieve the change of specification in the production line.

When changing product specifications in the existing longitudinal seam steel pipe production lines, manual operations on line are generally used to replace an entire set of rollers that need to be replaced while the production lines are shut down, or robots are used to replace rollers in a fully automatic manner, but the equipment for roller replacement by robot takes up a lot of space and is expensive. The present implementations provide a three-dimensional quick replacement machine for a production line, which completes the entire operation of specification change by providing a first unit, a second unit, a three-dimensional frame, a forming base, and a switching device, the switching device drives the first or second unit to move up and down in the three-dimensional frame, and the first and second units are alternately installed on the forming base to achieve the change of specification in the production line.

A roll stand having work rolls mounted therein. The roll stand has at least one upper mounting rail, which is mounted on the drive-side roll stand frame and oriented in a transverse direction to a rolling line running through the roll stand. In order to be able to keep the assembly space in the roll stand over the rolling line free during rollingexcept for a roll changeand still change the roll efficiently, the upper mounting rail is configured to be moved into the rolling line and out of the rolling line, starting from the drive-side roll stand frame.

An assembly, system and method for compensating a crane position offset error based on wheel float by viewing, with an optical sensor located on a trolley on the crane, a target or target shape adjacent a storage rack containing a vertically stored mill roll and determining a positional compensation signal based on a separation or offset of a center of a field of view of the sensor from a center of the target shape. The assembly, system or method compensates for the crane position offset error by moving the crane, as instructed by the positional compensation signal, a distance equal to the separation or offset of the center of the field of view of the sensor from the center of the target.

An assembly, system and method for compensating a crane position offset error based on wheel float by viewing, with an optical sensor located on a trolley on the crane, a target or target shape adjacent a storage rack containing a vertically stored mill roll and determining a positional compensation signal based on a separation or offset of a center of a field of view of the sensor from a center of the target shape. The assembly, system or method compensates for the crane position offset error by moving the crane, as instructed by the positional compensation signal, a distance equal to the separation or offset of the center of the field of view of the sensor from the center of the target.