METHOD AND APPARATUS FOR UNCOILING HEATED COILS OF STEEL BAR FOR HOT ROLLING

摘要

A billet is hot rolled to convert it to an elongated bar of intermediate cross sectional size. The bar is wound previously into a coil and placed in a furnace to reheat it for subsequent rolling and size reduction. The coil stands on its axis in the furnace with a free upper end thereof accessible to a workman through the furnace door. The furnace has a conical exit passageway in its roof which is connected to a curved guide tube. A starter chain is admitted to the furnace through the tube. The workman engages the free end of the coil with the starter chain which is retracted to withdraw the bar from the coil as a helix of variable diameter and pitch. The uncoiled bar is fed from the guide tube to a secondary rolling mill.