STEEL STOCK SHAPING APPARATUS PROVIDED WITH GUIDE APPARATUS AND STEEL STOCK SHAPING PROCESS

摘要

A device for correcting the shape of steel material composed of a rolling unit comprising a plurality of sets of three-way roll units arranged in series along the direction in which the steel material is conveyed, a three-way roll type sizing unit (1) for shape correction in precision rolling, and a guiding unit (5) made of carbon family material and having a guide hole (50) for guiding the sized steel material (W) to the subsequent process. An inner diameter of the guide hole (50) is set 0.1 to 8 mm larger than the outer diameter of the steel material (W) circular in cross section and a clearance between the inner wall (55) of the guide hole (50) and steel material (W) is exceedingly narrowed. Because of a large axial length of the guide hole (50), a curved portion of the tip of steel material (W) is corrected by the inner wall (55) of the guide hole (50) when entering said hole (50). An S-shaped curve otherwise caused when the steel material (W) is lightly rolled by the three-way roll unit can be partially or completely corrected. IMAGE