WO2007102602A1 - メカニカルエキスパンダー及び継目無鋼管の製造方法 - Google Patents
メカニカルエキスパンダー及び継目無鋼管の製造方法 Download PDFInfo
- Publication number
- WO2007102602A1 WO2007102602A1 PCT/JP2007/054695 JP2007054695W WO2007102602A1 WO 2007102602 A1 WO2007102602 A1 WO 2007102602A1 JP 2007054695 W JP2007054695 W JP 2007054695W WO 2007102602 A1 WO2007102602 A1 WO 2007102602A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- die
- tube
- steel pipe
- end portion
- Prior art date
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
Definitions
- the present invention relates to a mechanical expander for expanding a pipe end portion of a seamless steel pipe used in a pipeline for transporting fluids of oil and natural gas, and a seamless steel pipe using the mechanical expander.
- the present invention relates to a method of manufacturing a seamless steel pipe in which the pipe end portion is expanded.
- connection (circumferential welding) between steel pipes for line pipes is performed at the laying site.
- the seamless steel pipe to be used is required to have welding characteristics such as weldability, that is, weld defects with high welding efficiency are unlikely to occur.
- the inner diameter of the pipe end part (with a pipe opening force of 100 mm in the longitudinal direction, preferably between 300 mm) is particularly high and dimensional. It is necessary to ensure accuracy.
- Patent Document 1 discloses a method of correcting the inner diameter of the tube end portion by inserting a plug having a cylindrical body portion. Further, Patent Document 2 discloses that the material of the tube expansion die is changed to synthetic resin and the die segment is made elastic to expand the tube. Patent Document 1: Japanese Patent No. 2820043
- Patent Document 2 Japanese Patent No. 2900819
- the problem to be solved by the present invention is that, in order to improve the accuracy of the inner diameter of a pipe end portion of a seamless steel pipe manufactured in the hot state, the conventional technique reduces the strength, It is difficult to uniformly expand the tube from the end to the long side.
- An object of the present invention is to improve the accuracy of the inner diameter of a pipe end portion of a seamless steel pipe manufactured hot.
- the mechanical expander of the present invention inserts a cone and a die into the end of the tube to be expanded, and with the die fixed to the end of the tube, the cone is pulled out in the axial direction toward the outside of the tube.
- a mechanical expander that expands the end of the pipe by expanding the die outward in the radial direction by the action, and the outer periphery of the back end of the pipe is larger than the radius of the outer peripheral surface of the pipe mouth side on the outer periphery of the die.
- the method for manufacturing a seamless steel pipe according to the present invention includes a die formed with a taper on the outer periphery of the body portion, in which the radius of the outer peripheral surface at the back end of the tube is larger than the radius of the outer peripheral surface on the tube port side.
- the main feature of the mecha-cal expander is to expand the tube end.
- the taper value provided on the outer periphery of the body portion of the die is determined based on the experimental results of the inventors described later.
- the inventors examined the application of the mechanical expander that is used when manufacturing UOE steel pipes and that is expanded with a diameter-expandable pipe-expanding die only to the end part of the pipe.
- the mechanical expander includes a die 1 inserted into the inner surface of the steel pipe P to be expanded, and a cone 2 that pushes the die 1 to the inside force outward.
- the die 1 is divided into a plurality of parts in the circumferential direction, the outer surface of the body la contacting the inner surface of the steel pipe P is parallel to the steel tube axis, and the inner surface contacting the outer surface of the cone 2 is the inner surface of the steel pipe P.
- the side to be inserted into the part has a tapered shape with a large diameter.
- the outer surface of the cone 2 in contact with the die 1 has a taper shape with the same angle as the inner surface of the die 1, and the side to be inserted into the inner part of the steel pipe P has a large diameter.
- a method of expanding the steel pipe P using such a mechanical expander is as follows.
- the cone 2 is inserted into the end of the steel pipe P, and then the body la of the die 1 is inserted into the end of the steel pipe P.
- the steel pipe P can be expanded to a plurality of inner diameters with one mechanical expander. it can.
- the inventors have expanded the diameter of only the pipe end portion of the seamless steel pipe by a method of expanding with a tube expansion die having a freely expandable diameter. As a result, although the inner diameter of the tube port could be controlled within a tolerance within a predetermined range, the inner diameter of the tube port was larger than the inner diameter of the inner part of the tube.
- the gap dl between the die 1 and the cone 2 at the back end side of the barrel la is larger than the gap d2 between the cone 2 and the cone 2 at the pipe opening, and simultaneously acts on the back end of the barrel la. Since the pressure is higher than the surface pressure acting on the tube opening, as shown in FIG. 2 (b), the die 1 is inclined with respect to the tube axis at the end of tube expansion processing. As a result, it was found that the inner diameter of the pipe mouth of the steel pipe P was larger than the inner diameter of the inner part of the pipe.
- the steel pipe used in the experiment is a steel pipe having an outer diameter of 323.9 mm and a wall thickness of 25.4 mm.
- the axial length of the outer periphery of the body is 100 mm, and the outer periphery of the body is tapered to 0.5 mm, lmm, which is 0.5 mm larger than the outer periphery of the tube.
- a die with a difference in outer half diameter (0.5 mm and lmm) and a die without a taper were inserted, and these dice were expanded outwardly by pulling out the cone to expand the diameter.
- the inner peripheral surface of the inner part of the pipe of the die used was worn by 0.5 mm in the radial direction.
- the outer radius difference of the die body is lmm (If the body length is 100mm, the 2Z100 teno is used, so that the die wear amount force Omm is within the range of 2mm.
- the inner diameter difference of can be 1. Omm or less.
- the outer radius difference of the die body is 0.5 to 1.5 mm (If the body length is 100 mm, the die wear force from Omm to 2. Omm can be reduced to 1Z100 to 3Z100. Within the range, the difference in the inner radius between the tube end and the tube back of the straightened part can be 1.5mm or less.
- FIG. 1 is a schematic explanatory view of a mechanical expander, where (a) is a longitudinal sectional view of a main part, and (b) is an AA sectional view of FIG. (A).
- FIG. 2 (a) is a diagram for explaining a gap generated between a die and a cone, and (b) is a diagram showing a tilt of the die caused by wear on the back end side of the die at the moon.
- FIG. 3 is a diagram illustrating a mechanical expander according to the present invention.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800081929A CN101394952B (zh) | 2006-03-09 | 2007-03-09 | 机械扩管机以及无缝钢管的制造方法 |
MX2008011373A MX2008011373A (es) | 2006-03-09 | 2007-03-09 | Un expansor mecanico de extremo de tubo y un metodo para la fabricacion de un tubo de acero sin costuras. |
EP07738180.4A EP1992428B1 (en) | 2006-03-09 | 2007-03-09 | Mechanical expander and production method for seamless steel pipe |
CA2644176A CA2644176C (en) | 2006-03-09 | 2007-03-09 | A mechanical pipe-end expander and a method of manufacturing seamless steel pipe |
US12/230,892 US7765850B2 (en) | 2006-03-09 | 2008-09-08 | Mechanical pipe-end expander and a method of manufacturing seamless steel pipe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006064668A JP4983053B2 (ja) | 2006-03-09 | 2006-03-09 | メカニカルエキスパンダー及び継目無鋼管の製造方法 |
JP2006-064668 | 2006-03-09 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/230,892 Continuation US7765850B2 (en) | 2006-03-09 | 2008-09-08 | Mechanical pipe-end expander and a method of manufacturing seamless steel pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007102602A1 true WO2007102602A1 (ja) | 2007-09-13 |
Family
ID=38475021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/054695 WO2007102602A1 (ja) | 2006-03-09 | 2007-03-09 | メカニカルエキスパンダー及び継目無鋼管の製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7765850B2 (ja) |
EP (1) | EP1992428B1 (ja) |
JP (1) | JP4983053B2 (ja) |
CN (1) | CN101394952B (ja) |
CA (1) | CA2644176C (ja) |
MX (1) | MX2008011373A (ja) |
WO (1) | WO2007102602A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101166534B1 (ko) * | 2010-02-17 | 2012-07-19 | 주식회사 한국쿨러 | 자동변속기용 오일냉각기 제조방법 |
CN102489596B (zh) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | 钛合金矩形环轧件热胀形成形为异形环件的方法 |
CN102489595B (zh) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | 钛合金矩形环轧件的热胀形方法 |
CN102500687B (zh) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | 不锈钢矩形环轧件的冷胀形方法 |
CN102489594B (zh) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | 不锈钢闪光焊环件的热胀形方法 |
CN102513442B (zh) * | 2011-11-24 | 2014-02-05 | 贵州安大航空锻造有限责任公司 | 高温合金矩形环轧件热胀形成形为异形环件的方法 |
CN102489590B (zh) * | 2011-11-24 | 2014-04-02 | 贵州安大航空锻造有限责任公司 | 铝合金矩形环轧件的冷胀形方法 |
CN102500706B (zh) * | 2011-11-24 | 2014-02-05 | 贵州安大航空锻造有限责任公司 | 钛合金异形环轧件的热胀形方法 |
US9388885B2 (en) | 2013-03-15 | 2016-07-12 | Ideal Industries, Inc. | Multi-tool transmission and attachments for rotary tool |
CN103182459A (zh) * | 2013-03-21 | 2013-07-03 | 镇江市恒源汽车零部件有限公司 | 管件定径模具 |
US10940521B2 (en) | 2017-06-29 | 2021-03-09 | Milwaukee Electric Tool Corporation | Swage tool |
CN110814206A (zh) * | 2019-11-25 | 2020-02-21 | 沈阳航天新光集团有限公司 | 发动机燃烧室零件胀形成形方法 |
CN111496111B (zh) * | 2020-05-11 | 2022-03-08 | 桐庐千丁科技有限公司 | 倒拉式胀管机及倒拉式胀管方法 |
Citations (4)
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JPS59501197A (ja) * | 1982-07-01 | 1984-07-12 | ラスト パテント マニフアクテユア−ズ プロプライエタリ− リミテツド | チユ−ブエクスパンダ− |
JPH09285829A (ja) * | 1996-04-25 | 1997-11-04 | Mitsubishi Electric Corp | 管端成形装置および管端成形方法 |
JP2820043B2 (ja) | 1994-10-18 | 1998-11-05 | 住友金属工業株式会社 | 鋼管の管端内径矯正方法 |
JP2900819B2 (ja) | 1995-03-14 | 1999-06-02 | 住友金属工業株式会社 | 鋼管拡管機用拡管ダイス |
Family Cites Families (8)
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US3345730A (en) * | 1963-10-16 | 1967-10-10 | Murray Mfg Corp | Apparatus for affixing a flange to a tube |
US3385087A (en) * | 1966-02-18 | 1968-05-28 | Huth Mfg Corp | Swaging tool |
US3466920A (en) * | 1967-05-18 | 1969-09-16 | Stewarts & Lloyds Ltd | Expanding tool for use with a tubular workpiece |
US4308736A (en) * | 1979-01-05 | 1982-01-05 | J & S Hydraulics, Inc. | Tube expander |
JPS584239U (ja) * | 1981-06-29 | 1983-01-12 | 日本鋼管株式会社 | セグメント式拡管機におけるセグメント形状 |
US4967468A (en) * | 1986-10-27 | 1990-11-06 | Torque And Tension Equipment Inc. | Apparatus for fixing boiler tubes during replacement of same |
CN2659585Y (zh) * | 2003-11-20 | 2004-12-01 | 吉欣(英德)热轧不锈复合钢有限公司 | 热轧金属复合管可调径扩张器 |
US7225660B1 (en) * | 2005-05-13 | 2007-06-05 | Kw Industries, Inc. | Apparatus and method for expanding a tube diameter and a pole formed thereby |
-
2006
- 2006-03-09 JP JP2006064668A patent/JP4983053B2/ja not_active Expired - Fee Related
-
2007
- 2007-03-09 CN CN2007800081929A patent/CN101394952B/zh not_active Expired - Fee Related
- 2007-03-09 WO PCT/JP2007/054695 patent/WO2007102602A1/ja active Application Filing
- 2007-03-09 MX MX2008011373A patent/MX2008011373A/es active IP Right Grant
- 2007-03-09 EP EP07738180.4A patent/EP1992428B1/en active Active
- 2007-03-09 CA CA2644176A patent/CA2644176C/en active Active
-
2008
- 2008-09-08 US US12/230,892 patent/US7765850B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS59501197A (ja) * | 1982-07-01 | 1984-07-12 | ラスト パテント マニフアクテユア−ズ プロプライエタリ− リミテツド | チユ−ブエクスパンダ− |
JP2820043B2 (ja) | 1994-10-18 | 1998-11-05 | 住友金属工業株式会社 | 鋼管の管端内径矯正方法 |
JP2900819B2 (ja) | 1995-03-14 | 1999-06-02 | 住友金属工業株式会社 | 鋼管拡管機用拡管ダイス |
JPH09285829A (ja) * | 1996-04-25 | 1997-11-04 | Mitsubishi Electric Corp | 管端成形装置および管端成形方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1992428A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN101394952A (zh) | 2009-03-25 |
CA2644176A1 (en) | 2007-09-13 |
US7765850B2 (en) | 2010-08-03 |
JP2007237257A (ja) | 2007-09-20 |
JP4983053B2 (ja) | 2012-07-25 |
MX2008011373A (es) | 2008-09-18 |
CN101394952B (zh) | 2010-06-02 |
EP1992428A4 (en) | 2013-03-06 |
EP1992428B1 (en) | 2016-08-10 |
EP1992428A1 (en) | 2008-11-19 |
US20090038366A1 (en) | 2009-02-12 |
CA2644176C (en) | 2011-05-10 |
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