WO2009040894A1 - ピアサプラグ及び穿孔圧延方法 - Google Patents

ピアサプラグ及び穿孔圧延方法 Download PDF

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Publication number
WO2009040894A1
WO2009040894A1 PCT/JP2007/068640 JP2007068640W WO2009040894A1 WO 2009040894 A1 WO2009040894 A1 WO 2009040894A1 JP 2007068640 W JP2007068640 W JP 2007068640W WO 2009040894 A1 WO2009040894 A1 WO 2009040894A1
Authority
WO
WIPO (PCT)
Prior art keywords
piercer plug
boring
rolling
rlp
rsp
Prior art date
Application number
PCT/JP2007/068640
Other languages
English (en)
French (fr)
Inventor
Naoya Hirase
Kazuhiro Shimoda
Tomio Yamakawa
Original Assignee
Sumitomo Metal Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries, Ltd. filed Critical Sumitomo Metal Industries, Ltd.
Priority to PCT/JP2007/068640 priority Critical patent/WO2009040894A1/ja
Publication of WO2009040894A1 publication Critical patent/WO2009040894A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

　ピアサプラグの寿命を長く保たせると共に、穿孔圧延中の丸ビレットのスリップまたは穿孔圧延失敗の発生を防止することが可能なピアサプラグ及び穿孔圧延方法を提供する。 　本発明に係るピアサプラグ３は、下記の式（１）で定義される鈍頭係数が２８以上３５以下に設定されていることを特徴とする。 　鈍頭係数＝（ＲＳＰ／Ｂ'ｔ）／（ＲＬＰ／Ｌ１）×１０００　・・・（１） 　ここで、上記式（１）において、ＲＳＰはピアサプラグの先端部の曲率半径を、Ｂ'ｔはピアサプラグを用いて穿孔圧延する丸ビレットの外径を、ＲＬＰはピアサプラグの圧延部の曲率半径を、Ｌ１はピアサプラグの圧延部の長さを意味し、式（１）に入力されるＲＳＰ、Ｂ'ｔ、ＲＬＰ及びＬ１の数値は全て同じ単位である。
PCT/JP2007/068640 2007-09-26 2007-09-26 ピアサプラグ及び穿孔圧延方法 WO2009040894A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/068640 WO2009040894A1 (ja) 2007-09-26 2007-09-26 ピアサプラグ及び穿孔圧延方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/068640 WO2009040894A1 (ja) 2007-09-26 2007-09-26 ピアサプラグ及び穿孔圧延方法

Publications (1)

Publication Number Publication Date
WO2009040894A1 true WO2009040894A1 (ja) 2009-04-02

Family

ID=40510806

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/068640 WO2009040894A1 (ja) 2007-09-26 2007-09-26 ピアサプラグ及び穿孔圧延方法

Country Status (1)

Country Link
WO (1) WO2009040894A1 (ja)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0919705A (ja) * 1995-07-04 1997-01-21 Nkk Corp 継目無管製造用穿孔プラグ及び継目無管製造方法
JPH09300007A (ja) * 1996-05-15 1997-11-25 Sumitomo Metal Ind Ltd 継目無管の製造方法
JPH10137818A (ja) * 1996-11-05 1998-05-26 Kawasaki Steel Corp 継目無鋼管穿孔圧延用プラグ
WO2004052569A1 (ja) * 2002-12-12 2004-06-24 Sumitomo Metal Industries, Ltd. 継目無金属管の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0919705A (ja) * 1995-07-04 1997-01-21 Nkk Corp 継目無管製造用穿孔プラグ及び継目無管製造方法
JPH09300007A (ja) * 1996-05-15 1997-11-25 Sumitomo Metal Ind Ltd 継目無管の製造方法
JPH10137818A (ja) * 1996-11-05 1998-05-26 Kawasaki Steel Corp 継目無鋼管穿孔圧延用プラグ
WO2004052569A1 (ja) * 2002-12-12 2004-06-24 Sumitomo Metal Industries, Ltd. 継目無金属管の製造方法

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