METHOD FOR HOT ROLLING CHANNEL STEEL AND ITS ROLLING DEVICE LINE

摘要

PURPOSE: To improve the consumption unit of a rolling roll by forming the tip part of a flange so that it does not extrude, is smooth and circular when a channel steel is manufactured by universal rolling. ;CONSTITUTION: In a device line composed of a double rough rolling mill 1, an intermediate universal rolling mill 2, a rough form rolling mill 3, a flange form rolling mill 20 having vertical and horizontal rolls whose barrel width can be changed and a finish universal rolling mill 21, the shape of the tip of a desired flange is obtained by a recessed groove formed on one of upper and a lower rolling rolls of the rolling mill 20. Since a roll whose barrel width can be changed is used, products of many kinds of sizes can be manufactured without recombining rolls and the consumption unit of the roll and the operation efficiency can be improved. Especially, when a channel steel is cut in a lengthwise direction to be used as an invert for ship building, a suitable product can be obtained.;COPYRIGHT: (C)1993,JPO&Japio