EP1393832A1 - Verfahren und Vorrichtung zum Induktivbiegen von Rohren - Google Patents
Verfahren und Vorrichtung zum Induktivbiegen von Rohren Download PDFInfo
- Publication number
- EP1393832A1 EP1393832A1 EP03090269A EP03090269A EP1393832A1 EP 1393832 A1 EP1393832 A1 EP 1393832A1 EP 03090269 A EP03090269 A EP 03090269A EP 03090269 A EP03090269 A EP 03090269A EP 1393832 A1 EP1393832 A1 EP 1393832A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- plane
- pressure rollers
- pressure
- constraint
- 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.)
- Granted
Links
Images
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
-
- 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
- B21D9/18—Auxiliary equipment, e.g. machines for filling tubes with sand for heating or cooling of bends
Definitions
- the invention relates to a method for inductively bending pipes according to the Preamble of claim 1.
- DE-OS 2112019 discloses a method for inductively bending pipes. at In this method, an inductive coil is used to partially pipe a section of the pipe entire pipe circumference heated and bent with the help of a bending arm.
- a disadvantage of This method is that the pipe bend due to the acting forces over the entire arc area has an ovality, the reworking of the arc area required to achieve the given diameter.
- This proposed procedure is to be carried out by a system in which before or behind or in front of and behind the inductor in an adjustable distance from the tube Scaffold at least four in their distance from each other with the help of known hydraulic Actuators from a hydraulic system via hydraulic elements continuously adjustable Pressure rollers arranged in at least two mutually perpendicular planes are.
- the proposed procedure does not lead to the desired success because the required one Pre-ovalization or the expected springback can only be determined inaccurately. She can be preset too strong or too weak, so that after the springback a intolerable ovality remains. The default is problematic because it is used by many Parameters at the same time.
- the s / D ratio, the R / D ratio and the flow Material The manufacturing process of the output pipe also influences the degree of Springback.
- JP 56026625 A discloses a device for inductively bending pipes.
- a guide is arranged in front of the inductor, consisting of a holding device comprising the tube with a plurality of pressure rollers arranged distributed over the circumference. The distance between two opposing pressure rollers corresponds to the actual outside diameter of the incoming pipe.
- the pressure rollers which can be set to a predetermined distance, are intended to prevent ovalization of the bent tube.
- two axially spaced pressure rollers are provided per roller set.
- the object of the invention is to provide a method for inductively bending pipes, with the reproducible the formation of an impermissible ovality in the arch area is avoided.
- the arc section leaving the heating zone is in each case in one level selected the greatest expected ovality to at least two Setting the circumference to the nominal outside diameter of the pipe bend, in a rearward extension the plane is the center of rotation of the bending arm cuts.
- This procedure presupposes that at the beginning of the bending process a piece first Arc must be generated in order to at this first arc section and not at Output pipe to be able to exercise a guide by means of adjustable rollers.
- the optimal positions and spacing of the rolls are set by previous calculation, e.g. B. determined using the finite element method (FEM).
- FEM finite element method
- FIG. 1 a schematically inductively bent pipe cross section 2 has been drawn into an ideal pipe cross section 1 for demonstration purposes.
- Figure 2 shows the same cross-section 2 of an arc section as Figure 1 but with an exaggerated representation of the wall thickness.
- the output tube is not only pressed oval by the forces acting during inductive bending, but at the same time the wall thickness 3 is reduced in the tension zone and the wall thickness 4 is compressed in the pressure zone.
- FIG. 3 schematically shows an inductive bending system 5 designed according to the invention. It consists of a water-cooled inductor 6, only indicated here, a clamping element 7 with a bending arm 8 attached to it. The alignment lines from the inductor 6 and from the bending arm 8 intersect at the pivot point 9.
- a scaffold 11 is arranged according to the invention behind the inductor 6.
- it is equipped with three, preferably hydraulically adjustable, pressure rollers 14, 14 ', 14 "(see FIG. 4 ).
- the pressure rollers 14, 14', 14" preferably have a diaboloid shape in cross section.
- the hydraulic units 12, 13, 13 ' which actuate the pressure rollers are indicated. In this exemplary embodiment, they are arranged such that two 13, 13 'lie approximately opposite one another in the Y axis and a hydraulic unit 12 is located in the pressure zone region in the X axis.
- the circumferential arrows drawn on the hydraulic units 13, 13 ' are intended to indicate the possibility of being able to variably set the optimal position.
- LIST OF REFERENCE NUMBERS No. description 1 ideal pipe cross-section 2 curved pipe cross-section 3 Wall thick train zone 4 Wall thick pressure zone 5 inductive bending 6 inductor 7 clamping element 8th bending arm 9 pivot point 10 outlet pipe 11 framework 12 hydraulic power unit 13, 13 ' hydraulic power unit 14, 14 ', 14 " pressure rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- General Induction Heating (AREA)
Abstract
Description
Der Abstand zweier einander gegenüber liegender Druckrollen entspricht dem IST-Außendurchmesser des einlaufenden Rohres. Die auf einen vorgegebenen Abstand einstellbaren Druckrollen sollen das Ovalisieren des gebogenen Rohres verhindern. Vorzugsweise sind pro Rollensatz zwei axial beabstandet voneinander angeordnete Druckrollen vorgesehen.
- Figur 1
- schematisch den Vergleich gebogener Rohrquerschnitt mit idealem Rohrquerschnitt,
- Figur 2
- die Wanddickenverteilung in einem gebogenen Rohrquerschnitt,
- Figur 3
- schematisch eine erfindungsgemäß ausgebildete Induktivbiegeanlage,
- Figur 4
- eine Ansicht in Richtung X in Figur 3.
Bezugszeichenliste | |
Nr. | Bezeichnung |
1 | idealer Rohrquerschnitt |
2 | gebogener Rohrquerschnitt |
3 | Wanddicke Zugzone |
4 | Wanddicke Druckzone |
5 | Induktivbiegeanlage |
6 | Induktor |
7 | Klemmelement |
8 | Biegearm |
9 | Drehpunkt |
10 | Ausgangsrohr |
11 | Gerüst |
12 | Hydraulikaggregat |
13, 13' | Hydraulikaggregat |
14, 14', 14" | Druckrollen |
Claims (11)
- Verfahren zum Induktivbiegen von Rohren, insbesondere Großrohre, bei dem während des Biegevorganges unmittelbar hinter der Erwärmungszone ein auf das Rohr wirkender Druck ausgeübt wird
dadurch gekennzeichnet, dass jeweils der die Erwärmungszone verlassende Bogenabschnitt in einer die größte zu erwartende Ovalität ausgewählten Ebene an mindestens zwei Stellen des Umfangs auf Nennaußendurchmesser des Rohrbogens zwangsweise geführt wird,
wobei in rückwärtiger Verlängerung die Ebene den Drehmittelpunkt des Biegearmes schneidet. - Verfahren nach Anspruch 1
dadurch gekennzeichnet, dass der Führungszwang erstmalig ausgeübt wird, wenn der erste Bogenabschnitt eine für das Ansetzen eines Führungsmittels erforderliche Bogenerstreckung erreicht hat. - Verfahren nach Anspruch 1 und 2
dadurch gekennzeichnet, dass an zwei gegenüber liegenden Stellen des Umfanges der Führungszwang ausgeübt wird. - Verfahren nach Anspruch 3
dadurch gekennzeichnet, dass die Ebene des Führungszwanges nahezu mit der senkrechten Biegeebene zusammenfällt. - Verfahren nach Anspruch 1 und 2
dadurch gekennzeichnet, dass an drei über den Umfang verteilt angeordneten Stellen der Führungszwang ausgeübt wird. - Verfahren nach Anspruch 5
dadurch gekennzeichnet, dass die dritte Stelle des Führungszwanges in der waagerechten Biegeebene im Druckzonenbereich liegt. - Verfahren nach einem der Ansprüche 1 bis 6
dadurch gekennzeichnet, dass durch Abschätzung oder Berechnung die Anzahl, die Position und die Abstände der Stellen des Führungszwanges ermittelt werden. - Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 mit einem wassergekühlten Induktor, einem Biegearm und einem hinter dem Induktor angeordneten Gerüst, in dem stufenlos radial anstellbare Druckrollen befestigt sind
dadurch gekennzeichnet, dass mindestens zwei in Umfangsrichtung verschiebbare Druckrollen angeordnet sind, die während des Biegevorganges auf einen vorzugebenden Abstand fest einstellbar sind. - Vorrichtung nach Anspruch 8
dadurch gekennzeichnet, dass zwei Druckrollen vorgesehen sind, die einander gegenüber liegen. - Vorrichtung nach Anspruch 8 und 9
dadurch gekennzeichnet, dass die Anstelleinrichtung für die Druckrollen mit einem Anschlag versehen ist. - Vorrichtung nach Anspruch 9
dadurch gekennzeichnet, dass die Verschiebung der zwei einander gegenüber liegenden Druckrollen miteinander gekoppelt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10240341A DE10240341A1 (de) | 2002-08-27 | 2002-08-27 | Verfahren und Vorrichtung zum Induktivbiegen von Rohren |
DE10240341 | 2002-08-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1393832A1 true EP1393832A1 (de) | 2004-03-03 |
EP1393832B1 EP1393832B1 (de) | 2005-03-23 |
Family
ID=31197559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03090269A Expired - Lifetime EP1393832B1 (de) | 2002-08-27 | 2003-08-26 | Verfahren und Vorrichtung zum Induktivbiegen von Rohren |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1393832B1 (de) |
AT (1) | ATE291504T1 (de) |
DE (2) | DE10240341A1 (de) |
ES (1) | ES2236664T3 (de) |
PL (1) | PL204409B1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120003496A1 (en) * | 2009-01-14 | 2012-01-05 | Sumitomo Metal Industries, Ltd. | Hollow member and an apparatus and method for its manufacture |
CN103170810A (zh) * | 2013-04-17 | 2013-06-26 | 二重集团(德阳)重型装备股份有限公司 | 90°弯管的内壁堆焊方法 |
CN104097017A (zh) * | 2014-07-26 | 2014-10-15 | 唐山开元特种焊接设备有限公司 | 一种弯管堆焊机 |
CN104690117A (zh) * | 2015-03-27 | 2015-06-10 | 华电重工股份有限公司 | 大口径厚壁钢管的特大半径弯管及其成型方法 |
WO2016173584A1 (de) * | 2015-04-28 | 2016-11-03 | AWS Schäfer Technologie GmbH | VERFAHREN ZUM INDUKTIONSBIEGEUMFORMEN EINES DRUCKFESTEN ROHRS MIT GROßER WANDSTÄRKE UND GROßEM DURCHMESSER UND INDUKTIONS-ROHRBIEGEVORRICHTUNG |
CN109047379A (zh) * | 2018-10-11 | 2018-12-21 | 浙江工业大学之江学院 | 一种空间弯管截面椭圆度快速检测机构 |
CN112372318A (zh) * | 2020-11-05 | 2021-02-19 | 湖南翰坤实业有限公司 | 一种矩形框用折弯成型装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103447360A (zh) * | 2013-08-26 | 2013-12-18 | 河南省驰源石油化工机械有限公司 | 一种弧形钢管生产装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1487520A (en) * | 1975-07-23 | 1977-10-05 | Daiichi Koshuha Kogyo Kk | Method and apparatus for bending metal pipes bars or rods |
JPS5626625A (en) * | 1979-08-13 | 1981-03-14 | Dai Ichi High Frequency Co Ltd | Method and apparatus for preventing flattening at hot bending work for pipe |
DE3150381A1 (de) * | 1981-12-16 | 1983-06-23 | Mannesmann AG, 4000 Düsseldorf | Verfahren und anlage zur vermeidung der ovalitaet beim biegen von rohren |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902344A (en) * | 1974-04-01 | 1975-09-02 | Rollmet Inc | Tube bending method |
JPS59185527A (ja) * | 1983-04-07 | 1984-10-22 | Mitsubishi Heavy Ind Ltd | 高周波ベンダによる管曲げ方法及びその装置 |
-
2002
- 2002-08-27 DE DE10240341A patent/DE10240341A1/de not_active Withdrawn
-
2003
- 2003-08-26 EP EP03090269A patent/EP1393832B1/de not_active Expired - Lifetime
- 2003-08-26 DE DE50300381T patent/DE50300381D1/de not_active Expired - Lifetime
- 2003-08-26 ES ES03090269T patent/ES2236664T3/es not_active Expired - Lifetime
- 2003-08-26 AT AT03090269T patent/ATE291504T1/de not_active IP Right Cessation
- 2003-08-27 PL PL361869A patent/PL204409B1/pl not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1487520A (en) * | 1975-07-23 | 1977-10-05 | Daiichi Koshuha Kogyo Kk | Method and apparatus for bending metal pipes bars or rods |
JPS5626625A (en) * | 1979-08-13 | 1981-03-14 | Dai Ichi High Frequency Co Ltd | Method and apparatus for preventing flattening at hot bending work for pipe |
DE3150381A1 (de) * | 1981-12-16 | 1983-06-23 | Mannesmann AG, 4000 Düsseldorf | Verfahren und anlage zur vermeidung der ovalitaet beim biegen von rohren |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 005, no. 076 (M - 069) 20 May 1981 (1981-05-20) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120003496A1 (en) * | 2009-01-14 | 2012-01-05 | Sumitomo Metal Industries, Ltd. | Hollow member and an apparatus and method for its manufacture |
CN103170810A (zh) * | 2013-04-17 | 2013-06-26 | 二重集团(德阳)重型装备股份有限公司 | 90°弯管的内壁堆焊方法 |
CN104097017A (zh) * | 2014-07-26 | 2014-10-15 | 唐山开元特种焊接设备有限公司 | 一种弯管堆焊机 |
CN104690117A (zh) * | 2015-03-27 | 2015-06-10 | 华电重工股份有限公司 | 大口径厚壁钢管的特大半径弯管及其成型方法 |
WO2016173584A1 (de) * | 2015-04-28 | 2016-11-03 | AWS Schäfer Technologie GmbH | VERFAHREN ZUM INDUKTIONSBIEGEUMFORMEN EINES DRUCKFESTEN ROHRS MIT GROßER WANDSTÄRKE UND GROßEM DURCHMESSER UND INDUKTIONS-ROHRBIEGEVORRICHTUNG |
CN107567358A (zh) * | 2015-04-28 | 2018-01-09 | Aws舍费尔技术有限公司 | 用于感应弯曲成形具有大壁厚和大直径的耐压管的方法以及感应管弯曲装置 |
CN109047379A (zh) * | 2018-10-11 | 2018-12-21 | 浙江工业大学之江学院 | 一种空间弯管截面椭圆度快速检测机构 |
CN109047379B (zh) * | 2018-10-11 | 2024-03-08 | 浙江工业大学之江学院 | 一种空间弯管截面椭圆度快速检测机构 |
CN112372318A (zh) * | 2020-11-05 | 2021-02-19 | 湖南翰坤实业有限公司 | 一种矩形框用折弯成型装置 |
CN112372318B (zh) * | 2020-11-05 | 2021-10-15 | 湖南翰坤实业有限公司 | 一种矩形框用折弯成型装置 |
Also Published As
Publication number | Publication date |
---|---|
DE10240341A1 (de) | 2004-03-18 |
EP1393832B1 (de) | 2005-03-23 |
ES2236664T3 (es) | 2005-07-16 |
PL361869A1 (en) | 2004-03-08 |
PL204409B1 (pl) | 2010-01-29 |
DE50300381D1 (de) | 2005-04-28 |
ATE291504T1 (de) | 2005-04-15 |
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