JPH0386301A - Rail rolling method - Google Patents

Abstract

PURPOSE:To shorten the length of a rolling line and to reduce an equipment cost in the universal rolling of a track by moving an edge rolling mill having >=3 caliber orthogonally to a rolling progressing direction, aligning each caliber with the pass line of adjacent universal rolling mills and executing rolling. CONSTITUTION:The rolling layout of a rail is composed of a rough rolling mill BD having caliber in six kinds, an intermediate universal rolling mill U1, an edge rolling mill E having three kinds of caliber and equipped with a vertical roll and a finish rolling mill F. A rolling steel is then rolled in the rough shape of the rail by the BD rolling mill. The U1 rolling mill is then made an empty pass and it is rolled by the E rolling mill CAL6 caliber. Thereafter it is reciprocated between the U1 rolling mill and E rolling mill, rolled by the F rolling mill after its rolling of five passes and becomes a product. At this time, each caliber is aligned with the pass line of the adjacent universal rolling mills U1 in order to CAL6 CAL4E CAL2E with the rapid movement of the E rolling mill orthogonally with the rolling direction according to the progress of the rolling pass and the rolling steel is rolled.