Rolling stand with skewed working rolls and a roll preloading device

摘要

The rolling stand comprises four support columns (2), two conical rolling rolls with skewed rolling axes which are oblique to each other and are fixed to two roll cradles (6, 7), four jacks (24, 26) below the lower roll cradle (7) for exercising a preloading force on such a roll cradle. Four jacks (20, 21, 22, 23) are arranged above to exercise a preloading force on the upper roll cradle (6) during rolling. The stand also comprises four upper hydraulic capsules (((30, 32, 33, 40, 42, 43) and four lower hydraulic capsules (37, 46), 47) for exercising push forces and controlling the upper (6) and lower (7) roll cradles and the rolling position of the working rolls.

主权项

1. A rolling stand defining a rolling, axis comprising
a support structure having a longitudinal axis which is orthogonal to the rolling axis, a first and a second working roll having peripheral surfaces facing each other and defining a rolling passage, said first and second working rolls having skewed axes to each other, a first and a second roll cradle, wherein said first roll cradle integrally supports the first working roll and said second roll cradle integrally supports the second working roll, characterized in that it provides at least two first hydraulic jacks arranged and configured to exercise first pushing forces on surfaces of the second roll cradle distal from the rolling passage, at least two second hydraulic jacks arranged and configured in order to exercise second pushing forces in an opposite direction to the first pushing forces on surfaces of the first roll cradle distal from the rolling passage, at least two first hydraulic capsules arranged and configured to exercise third pushing forces on surfaces of the first roll cradle proximal to the rolling passage and to define a reciprocal distance between the first and the second roll cradle, at least two second hydraulic capsules arranged and configured to exercise fourth pushing forces on surfaces of the second roll cradle proximal with respect to the rolling passage and to define a reciprocal distance between the first and the second roll cradle in cooperation with the at least two first hydraulic capsules, control means for controlling position of said first and second roll cradles configured in order to control position and pushing forces of the at least two first hydraulic capsules and of the at least two second hydraulic capsules, of the pushing forces of the at least two first hydraulic jacks and of the at least two second hydraulic jacks; and wherein the first and the second roll cradles have a respective peripheral surface provided with indentations and protrusions arranged in alternating succession and are configured to allow removal, of the hydraulic jacks and the hydraulic capsules from the stand in the direction of the longitudinal axis during assembly and disassembly of the first and the second roll cradles.