JPS55112107A - Rolling method for press roll piercing - Google Patents

Rolling method for press roll piercing

Info

Publication number
JPS55112107A
JPS55112107A JP1788279A JP1788279A JPS55112107A JP S55112107 A JPS55112107 A JP S55112107A JP 1788279 A JP1788279 A JP 1788279A JP 1788279 A JP1788279 A JP 1788279A JP S55112107 A JPS55112107 A JP S55112107A
Authority
JP
Japan
Prior art keywords
ellipse type
mills
press roll
pipe blank
round
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP1788279A
Other languages
Japanese (ja)
Inventor
Minoru Kawarada
Yoshiki Nanbu
Susumu Mizunuma
Hiroe Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP1788279A priority Critical patent/JPS55112107A/en
Publication of JPS55112107A publication Critical patent/JPS55112107A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
    • B21B17/10—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a continuous process

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

PURPOSE:To prevent generation of over filling and wrinkle flaw, and to efficiently elongate the ellipse type thick walled hollow pipe blank, and to make possible the manufacture of the seamless steel pipe of good quality, by constituting so as to perform the ellipse type press roll rolling pass, and then, to perform the forming work with the round caliber of the rolling mill. CONSTITUTION:The rolling mills 1a, 1b, facing each other, possessing the ellipse type calibers, and the rolling mills 11a, 11b, possessing the round calibers, are continuously installed respectively in horizontal and vertical positions; a square billet 4a is inserted into the mills 1a, 1b, and the common mandrel 12 is pierced in order to form the ellipse type thick walled hollow pipe blank 4b; and next, this pipe blank 4b is rolled by the mills 11a, 11b, and is elongated into the round hollow pipe blank. By performing the ellipse type press roll piercing, the generation of the over filling and wrinkle flaw can be prevented, and the elongation can be efficiently performed. As a result, the seamless steel pipe of good quality can be manufactured.
JP1788279A 1979-02-20 1979-02-20 Rolling method for press roll piercing Pending JPS55112107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1788279A JPS55112107A (en) 1979-02-20 1979-02-20 Rolling method for press roll piercing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1788279A JPS55112107A (en) 1979-02-20 1979-02-20 Rolling method for press roll piercing

Publications (1)

Publication Number Publication Date
JPS55112107A true JPS55112107A (en) 1980-08-29

Family

ID=11956063

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1788279A Pending JPS55112107A (en) 1979-02-20 1979-02-20 Rolling method for press roll piercing

Country Status (1)

Country Link
JP (1) JPS55112107A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5847795A (en) * 1995-07-27 1998-12-08 Canon Kabushiki Kaisha Liquid crystal display apparatus and anti-reflection film applicable thereto
US8267631B2 (en) 2010-07-26 2012-09-18 Infom Co., Ltd. Fitting member positioning device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5847795A (en) * 1995-07-27 1998-12-08 Canon Kabushiki Kaisha Liquid crystal display apparatus and anti-reflection film applicable thereto
US8267631B2 (en) 2010-07-26 2012-09-18 Infom Co., Ltd. Fitting member positioning device

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