ELECTRO-SEAMED STEEL PIPE MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide an electro-seamed steel pipe manufacturing method capable of preventing a thickness deviation and bend after a reduction rolling ended, when an electro-seamed steel pipe cut to remove the internal and external projections of beads is heated with high-frequency induct...

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Bibliographische Detailangaben
Hauptverfasser:	HORI HIROMICHI, INABA KAZUYA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an electro-seamed steel pipe manufacturing method capable of preventing a thickness deviation and bend after a reduction rolling ended, when an electro-seamed steel pipe cut to remove the internal and external projections of beads is heated with high-frequency induction heating and subjected to reduction rolling.SOLUTION: An electro-seamed steel pipe manufacturing method measures the circumferential temperature distribution 6 of an electro-seamed steel pipe 1 heated by a high-frequency induction heating 2, and cooling water is injected to cool the high temperature portion so that a temperature distribution in the circumferential direction of the electro-seamed steel pipe is homogenized and serviced for reduction rolling 3.SELECTED DRAWING: Figure 1 【課題】ビードの内外突出部を切削除去した電縫鋼管を高周波誘導加熱で加熱し、さらに絞り圧延を行なうにあたって、絞り圧延が終了した後の偏肉および曲りを防止することが可能な電縫鋼管の製造方法の提供。【解決手段】高周波誘導加熱２によって加熱した電縫鋼管１の円周方向の温度分布６を測定し、温度分布の高温部に冷却水を噴射して冷却することによって電縫鋼管の円周方向の温度分布を均一にして絞り圧延３に供する電縫鋼管の製造方法。【選択図】図１