Patent ID: 6205834
Filing Date: 2001-03-27
Classification: B21B

Abstract:
A method of rolling finished sections from a preliminary section using roll stand arrangements which operate 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, and a roughing rolling group arranged in front of the compact rolling group and composed of vertical roll stands and horizontal rolls stands and/or universal stands, the method comprising, with one or more of the roll stands of the roughing rolling group and/or one or more of the roll stands of the compact rolling group being equipped with several selectable grooves which can optionally be moved into and out of a rolling line, or with grooves of a roll stand located next to each other which can become effective for rolling by displacing the rolling stock transversely of the rolling line, preshaping a rectangular preliminary section or a preliminary section having approximate final dimensions in the roll stands of the roughing rolling group in a number of shape changing passes or shape reduction passes, possibly in a reversing manner with or without the use of selectable grooves, subsequently further shaping the section in the compact rolling group, possibly in a reversing manner in several shape changing passes or shape reduction passes in the universal stand on the entry side, possibly in the intermediate edging stand with or without the use of the selectable grooves or grooves of the roll stands located next to each other, and subsequently shaping the section into the finished section in the universal stand on the exit side or in the intermediate edging stand, wherein, for rolling crawler chain links from a preliminary section having a rectangular cross-section or an I-shaped cross-section, possibly with a web portion having a slightly increased thickness, comprising edging the preliminary section in the vertical stand of the roughing rolling group, subsequently section-preshaping the section in the horizontal stand of this group, and then finish-rolling in a shape-reducing manner in respectively two or more passes and reversing pass sequences with or without inclusion of the selectable grooves of the intermediate upsetting stand in the groove rows of the compact stand group.