ROLLING METHOD

To prevent rotation of a steel material between rolling mills when continuously rolling a straight rod or a wire material, without requiring large-scale equipment modification and without applying a large load to a guide.SOLUTION: In a rolling method for manufacturing a steel material composed of a...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: YAMADA TOMOMI, HARA KOJI, YAMAGAMI DAISAKU
Format: Patent
Sprache:eng ; jpn
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:To prevent rotation of a steel material between rolling mills when continuously rolling a straight rod or a wire material, without requiring large-scale equipment modification and without applying a large load to a guide.SOLUTION: In a rolling method for manufacturing a steel material composed of a straight rod or a wire material by means of a plurality of rolling mills arranged along a pass line, includes a pair of guide rollers 5 that guide the steel material 3 toward an inlet side of the rolling mills. When an area reduction rate in a preceding rolling mill with respect to the guide roller 5 is 12% or more, a rolling condition is set for the guide roller 5 such that a steel material retention α defined by the following formula is in a range of 0.75 or more and 1.2 or less: α=(w/H)×cos θ, where H is a height dimension of the steel material, w is a width of contact between the steel material and the guide roller, and θ is an angle formed by a perpendicular line to a curved surface of the guide roller and a facing direction of the pair of guide rollers, at an end of the contact between the steel material and the guide roller.SELECTED DRAWING: Figure 4 【課題】大掛かりな設備改造が不要であり、且つガイドに大きな負荷をかけることなく、直棒や線材を連続圧延する際、圧延機間で鋼材が回転することを抑制する。【解決手段】パスラインに沿って並んだ複数の圧延機で、直棒若しくは線材からなる鋼材を製造する圧延方法であって、圧延機の入り側に鋼材3を案内する一対のガイドローラー5を備え、上記ガイドローラー5に対する前段圧延機での減面率が12%以上の場合、上記ガイドローラー5に対し、下記式で定義される鋼材保持性αが0.75以上1.2以下の範囲となるように圧延条件を設定する。α=(w/H)×cosθここで、H:鋼材の高さ寸法w:鋼材とガイドローラーとの接触幅θ:鋼材とガイドローラーとの接触端における、ガイドローラーの曲面に対する垂線と一対のガイドローラーの対向方向とがなす角度【選択図】図4