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WO2008123034A1 - Method for treating pipe end of metal pipe material and plug - Google Patents

Method for treating pipe end of metal pipe material and plug Download PDF

Info

Publication number
WO2008123034A1
WO2008123034A1 PCT/JP2008/054854 JP2008054854W WO2008123034A1 WO 2008123034 A1 WO2008123034 A1 WO 2008123034A1 JP 2008054854 W JP2008054854 W JP 2008054854W WO 2008123034 A1 WO2008123034 A1 WO 2008123034A1
Authority
WO
WIPO (PCT)
Prior art keywords
plug
pipe end
pipe
metal pipe
central axis
Prior art date
Application number
PCT/JP2008/054854
Other languages
French (fr)
Japanese (ja)
Inventor
Kazuhiro Ishii
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.
Publication of WO2008123034A1 publication Critical patent/WO2008123034A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Abstract

A method for treating the pipe end of a metal pipe material in which a threaded portion can be formed with high precision dimensions while preventing occurrence of flaw on the inside at the pipe end when the threaded portion is formed at the pipe end of the metal pipe material. A plug for use therein is also provided. Before a threaded portion is formed at the pipe end of a metal pipe material (2), a process for enlarging a pipe is carried out using a plug (1) having such a sliding portion (1a) as the diameter of cross-section decreases from a position X(D) in the central axis direction where the diameter of cross-section becomes maximum diameter D toward the distal end and the taper angle ϑ of a taper surface S, i.e. the outer surface of the sliding portion (1a), for the central axis M is not larger than 3.5° (i.e. ϑ≤3.5°) between a position X(0.7D) in the central axis direction where the diameter of cross-section becomes 0.7D and the position X(D) in the central axis direction. In this process for enlarging a pipe, the contact angle α(equal to the taper angle ϑ) becomes 3.5° or less when the taper surface S of the plug (1) touches the pipe end of the metal pipe material (2).
PCT/JP2008/054854 2007-03-30 2008-03-17 Method for treating pipe end of metal pipe material and plug WO2008123034A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007091265A JP2010142810A (en) 2007-03-30 2007-03-30 Method of treating pipe end of metallic pipe material and plug
JP2007-091265 2007-03-30

Publications (1)

Publication Number Publication Date
WO2008123034A1 true WO2008123034A1 (en) 2008-10-16

Family

ID=39830536

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/054854 WO2008123034A1 (en) 2007-03-30 2008-03-17 Method for treating pipe end of metal pipe material and plug

Country Status (2)

Country Link
JP (1) JP2010142810A (en)
WO (1) WO2008123034A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011016434A1 (en) * 2009-08-07 2011-02-10 住友金属工業株式会社 Plug for expanding end of metal pipe, method for expanding pipe using plug, and method for manufacturing metal pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9468967B2 (en) 2011-02-15 2016-10-18 Nippon Steel & Sumitomo Metal Corporation Pipe end correction method of seamless pipe made of high CR stainless steel
CN107052175B (en) * 2017-04-28 2019-08-06 西北有色金属研究院 A mandrel for tube expansion forming of titanium and titanium alloy hot pushing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6224828A (en) * 1985-07-25 1987-02-02 Sumitomo Metal Ind Ltd Mandrel for tube expansion
JPH06210321A (en) * 1993-01-14 1994-08-02 Nkk Corp Plug for rolling seamless steel tube with descaling brush
JP2001113329A (en) * 1999-10-19 2001-04-24 Sumitomo Metal Ind Ltd Internal expansion tool for pipe expansion and method for diameter expansion of steel pipe
WO2006033376A1 (en) * 2004-09-21 2006-03-30 Sumitomo Metal Industries, Ltd. Plug, method of expanding inside diameter of metal pipe or tube using such plug, method of manufacturing metal pipe or tube, and metal pipe or tube

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6224828A (en) * 1985-07-25 1987-02-02 Sumitomo Metal Ind Ltd Mandrel for tube expansion
JPH06210321A (en) * 1993-01-14 1994-08-02 Nkk Corp Plug for rolling seamless steel tube with descaling brush
JP2001113329A (en) * 1999-10-19 2001-04-24 Sumitomo Metal Ind Ltd Internal expansion tool for pipe expansion and method for diameter expansion of steel pipe
WO2006033376A1 (en) * 2004-09-21 2006-03-30 Sumitomo Metal Industries, Ltd. Plug, method of expanding inside diameter of metal pipe or tube using such plug, method of manufacturing metal pipe or tube, and metal pipe or tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011016434A1 (en) * 2009-08-07 2011-02-10 住友金属工業株式会社 Plug for expanding end of metal pipe, method for expanding pipe using plug, and method for manufacturing metal pipe
JPWO2011016434A1 (en) * 2009-08-07 2013-01-10 住友金属工業株式会社 Plug for expanding end of metal tube, tube expansion method using plug, and method of manufacturing metal tube

Also Published As

Publication number Publication date
JP2010142810A (en) 2010-07-01

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