EP0169564A3 - Method and apparatus for bending elongate work pieces, in particular tubes - Google Patents

Method and apparatus for bending elongate work pieces, in particular tubes Download PDF

Info

Publication number
EP0169564A3
EP0169564A3 EP85109332A EP85109332A EP0169564A3 EP 0169564 A3 EP0169564 A3 EP 0169564A3 EP 85109332 A EP85109332 A EP 85109332A EP 85109332 A EP85109332 A EP 85109332A EP 0169564 A3 EP0169564 A3 EP 0169564A3
Authority
EP
European Patent Office
Prior art keywords
workpiece
zone
cross
sectional
primarily
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.)
Withdrawn
Application number
EP85109332A
Other languages
German (de)
French (fr)
Other versions
EP0169564A2 (en
Inventor
Jelke Ringersma
Johannes Marinus Hofstede
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.)
Cojafex BV
Original Assignee
Cojafex BV
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 Cojafex BV filed Critical Cojafex BV
Publication of EP0169564A2 publication Critical patent/EP0169564A2/en
Publication of EP0169564A3 publication Critical patent/EP0169564A3/en
Withdrawn legal-status Critical Current

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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • B21D7/025—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Biegen länglicher Werkstücke, insbesonde­ re Rohre, durch Aufbringen eines Biegemoments auf das Werkstück unter induktivem Erhitzen einer Querschnittszone des Werkstücks mit ungleichmäßiger Temperaturverteilung längs des Umfangs dieser Querschnittszone mittels einer das Werkstück umgebenden Induktionsschleife und unter Abkühlen des Werkstücks in mindestens einer Nachbarzone. Nach dem erfindungsgemäßen Verfahren ist vorgesehen, daß innerhalb eines auf relative niedrige Temperaturen einzustellenden Teilbereichs des Umfangs des zu beigenden Werkstücks der elektrische Strom der Induktionsschleife in mehrere Teilströme verzweight wird, von denen mindestens einer vornehmlich auf die zu erhitzende Querschnittszine und mindestens ein anderer vornehmlich auf eine Nachbar­ zone des Werkstücks induktiv zur Einwirkung gebracht wird, und daß die induktive Erhitzung der jeweiligen Nachbarzone durch Abkühlen teilweise oder ganz aufgehoben wird. Die Verzweigung kann vorrichtungsmäßig durch eine die Induk­ tionsschleife (11) verzweigende Bypassleitung (15) realisiert werden. The invention relates to a method and a Device for bending elongated workpieces, in particular right pipes, by applying a bending moment to the Workpiece with inductive heating of a cross-sectional area of the workpiece with uneven temperature distribution along the circumference of this cross-sectional zone by means of a Workpiece surrounding induction loop and under Cooling of the workpiece in at least one neighboring zone. According to the method according to the invention, that within a to relatively low temperatures Part of the scope of the scope to be attached Workpiece the electrical current of the induction loop in Several partial streams will be weighted, of which at least one primarily on the cross-sectional zine to be heated and at least one other primarily on a neighbor zone of the workpiece is inductively affected, and that the inductive heating of the respective neighboring zone partially or completely canceled by cooling. The The device can be branched by an inductor tion loop (11) branching bypass line (15) realized will.

EP85109332A 1984-07-26 1985-07-25 Method and apparatus for bending elongate work pieces, in particular tubes Withdrawn EP0169564A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3427639 1984-07-26
DE19843427639 DE3427639A1 (en) 1984-07-26 1984-07-26 METHOD AND DEVICE FOR BENDING LONG-TERM WORKPIECES, IN PARTICULAR PIPES

Publications (2)

Publication Number Publication Date
EP0169564A2 EP0169564A2 (en) 1986-01-29
EP0169564A3 true EP0169564A3 (en) 1987-05-13

Family

ID=6241675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109332A Withdrawn EP0169564A3 (en) 1984-07-26 1985-07-25 Method and apparatus for bending elongate work pieces, in particular tubes

Country Status (3)

Country Link
US (1) US4596128A (en)
EP (1) EP0169564A3 (en)
DE (1) DE3427639A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5222384A (en) * 1992-03-24 1993-06-29 Evans Roland J Reciprocal conduit bender
US6038902A (en) * 1998-01-23 2000-03-21 The Babcock & Wilcox Company Intrados induction heating for tight radius rotary draw bend
JP3400767B2 (en) * 2000-02-28 2003-04-28 徹 佐藤 Steel pipe bending apparatus and method
US6769282B2 (en) 2002-05-17 2004-08-03 Henden Industries, Inc. One-step offset bender
DE102005025337A1 (en) * 2005-01-21 2006-07-27 Alutec-Belte Ag Rotation-symmetric body e.g. alloy wheel manufacturing method, involves inductively heating wheel blank within rim area, such that thin rim base and rim flange of specific rim width and wall thickness are formed using shaping tool
US8863565B2 (en) * 2005-03-03 2014-10-21 Nippon Steel & Sumitomo Metal Corporation Three-dimensionally bending machine, bending-equipment line, and bent product
US8919171B2 (en) * 2005-03-03 2014-12-30 Nippon Steel & Sumitomo Metal Corporation Method for three-dimensionally bending workpiece and bent product
US20090056223A1 (en) * 2007-09-04 2009-03-05 Patel Sunilkant A Quench ring rim and methods for fabricating
ITMI20072372A1 (en) * 2007-12-19 2009-06-20 Ibf S P A PROCEDURE FOR BENDING TUBULAR ARTICLES WITH A REPORT> 3 BETWEEN THE BENDING RADIUS AND THE EXWERN DIAMETER OF THE FINISHED TUBE
EA024298B1 (en) * 2008-11-12 2016-09-30 Сумитомо Метал Индастриз, Лтд. Arm material for an automobile suspension and method for its manufacture
DE102009060743B4 (en) * 2009-12-30 2011-11-24 Nova Bausysteme Gmbh Method and device for producing helices from wires
KR101404386B1 (en) * 2010-01-06 2014-06-09 신닛테츠스미킨 카부시키카이샤 Induction heating coil, device for manufacturing of workpiece, and manufacturing method
EA020748B1 (en) * 2010-01-06 2015-01-30 Сумитомо Метал Индастриз, Лтд. Method and device for manufacturing bent member
US8511123B2 (en) * 2010-05-10 2013-08-20 Crc-Evans Pipeline International, Inc. Wedge driven pipe bending machine
DE102010020360B4 (en) * 2010-05-13 2016-06-16 AWS Schäfer Technologie GmbH Bending machine for left and right bends
EP3205419A4 (en) * 2014-10-07 2018-07-04 Nippon Steel & Sumitomo Metal Corporation Cooling apparatus and cooling method for steel material
US10427351B2 (en) 2016-02-19 2019-10-01 General Electric Company Apparatus for induction heating and bending of thermoplastic composite tubes and a method for using same
US11414723B2 (en) * 2018-05-21 2022-08-16 Welspun Corp Limited Systems and methods for producing hot induction pipe bends with homogeneous metallurgical and mechanical properties
CN109909335B (en) * 2019-03-15 2024-01-23 株洲汉和工业设备有限公司 Vertical numerical control induction heating pipe bending machine
CN116786650B (en) * 2023-08-29 2023-10-24 河北恒通管件集团有限公司 Device and method for bending bent pipe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112019A1 (en) * 1970-03-12 1971-09-30 Cojafex Device for bending elongated objects
FR2128665A1 (en) * 1971-03-05 1972-10-20 Cojafex
FR2181642A1 (en) * 1972-04-28 1973-12-07 Babcock & Wilcox Ag
DE2738394A1 (en) * 1976-09-03 1978-03-16 Cojafex METHOD AND DEVICE FOR BENDING LONG EXTENDED OBJECTS
FR2392742A1 (en) * 1977-05-31 1978-12-29 Prvni Brnenska Strojirna APPARATUS FOR BENDING PIPES, ESPECIALLY LARGE THIN WALL STEEL PIPES
US4177661A (en) * 1975-12-05 1979-12-11 Mannesmann Aktiengesellschaft Method and apparatus for bending large pipes
FR2497696A2 (en) * 1981-01-13 1982-07-16 Stein Industrie Method of bending metal tubes - entails stressing tube via traversing heating collar using equal cooling flows over and under zone leaving collar

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD92889A (en) *
US783716A (en) * 1904-05-16 1905-02-28 Whitlock Coil Pipe Company Apparatus for bending pipe.
US1891338A (en) * 1931-02-09 1932-12-20 Lester W Snell Method of and means for bending tubes
US2480774A (en) * 1946-06-28 1949-08-30 Kellogg M W Co Method of bending thin walled thermoplastic bodies, including tubes
US2461323A (en) * 1946-07-27 1949-02-08 Ladish Co Induction heater for use with pipe bending apparatus
GB778842A (en) * 1951-08-23 1957-07-10 Green & Son Ltd Improvements in or connected with tube bending
NL279654A (en) * 1961-07-17
US3368377A (en) * 1965-09-17 1968-02-13 Hirayama Atsuo Methods of bending electrically conductive long materials such as bar, rod, and pipe, and means therefor
DE1935100C3 (en) * 1969-07-10 1980-07-31 Centralnyj Nautschno-Issledovatelskij Institut Technologii Maschinostroenija, Moskau Process for pipe bending and equipment for carrying out the process
DE2822618C2 (en) * 1978-05-24 1985-12-12 Adolf 7000 Stuttgart Stambera Packaging machine, in particular case packing machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2112019A1 (en) * 1970-03-12 1971-09-30 Cojafex Device for bending elongated objects
FR2128665A1 (en) * 1971-03-05 1972-10-20 Cojafex
FR2181642A1 (en) * 1972-04-28 1973-12-07 Babcock & Wilcox Ag
US4177661A (en) * 1975-12-05 1979-12-11 Mannesmann Aktiengesellschaft Method and apparatus for bending large pipes
DE2738394A1 (en) * 1976-09-03 1978-03-16 Cojafex METHOD AND DEVICE FOR BENDING LONG EXTENDED OBJECTS
FR2392742A1 (en) * 1977-05-31 1978-12-29 Prvni Brnenska Strojirna APPARATUS FOR BENDING PIPES, ESPECIALLY LARGE THIN WALL STEEL PIPES
FR2497696A2 (en) * 1981-01-13 1982-07-16 Stein Industrie Method of bending metal tubes - entails stressing tube via traversing heating collar using equal cooling flows over and under zone leaving collar

Also Published As

Publication number Publication date
EP0169564A2 (en) 1986-01-29
US4596128A (en) 1986-06-24
DE3427639C2 (en) 1988-04-14
DE3427639A1 (en) 1986-02-06

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Inventor name: HOFSTEDE, JOHANNES MARINUS

Inventor name: RINGERSMA, JELKE