Patent ID: 6035683
Filing Date: 2000-03-14
Classification: B21B

Abstract:
A method of casting and rolling Z-sections for sheet piling sections from a preliminary section which arrives from a continuous casting machine and has approximate final dimensions, the method utilizing roll stand arrangements operating in a rolling line in a reversing operation, the roll stand arrangements including a compact rolling group composed of a first universal stand at an entry side and a second universal stand at an exit side and an intermediate edging stand arranged between the universal stands, a roughing rolling group composed of vertical roll stands and horizontal roll stands being arranged in front of the compact rolling group, wherein, for rolling the sheet piling sections, with one of the roll stands of the roughing rolling group and one of the roll stands of the compact rolling group being equipped with selectable grooves configured to be moveable into and out of the rolling line, the method comprising shaping the preliminary section in the roll stands of the roughing group in a number of shape changing passes and shape reduction passes, subsequently further shaping the section in the compact rolling group in several shape changing passes or shape reduction passes and reversing passes in the universal stand on the entry side and in the intermediate edging stand with or without the use of the selectable grooves, wherein the compact rolling group operates as a tandem stand group, wherein the roughing rolling group has in a first rolling line a runout roller table and a transverse transport device following the runout roller table and in a second rolling line a parallel run-in roller table for the compact tandem stand group, and the horizontal stand of the roughing rolling group and the intermediate edging stand of the compact tandem stand group each have first and second selectable grooves, and wherein a group of two-high horizontal stands is arranged at a distance following the universal stand on the exit side of the compact tandem group and each of the two-high horizontal stands has grooved rolls, further comprising, for adjusting a width and for adjusting a shape of a preliminary section having a H-shaped cross-section while simultaneously reducing the cross-section in the roughing rolling group, carrying out further reduction of the cross-section with deformation of section ends for forming a basic shape of interlocks of the Z-section in the compact tandem stand group and carrying out a final finish-shaping of the interlocks of the Z-section in the grooves of the group of two-high horizontal stands.