DE2712453A1 - Thick wall welded pipe bend - has single flat blank bent by doubly curved ram to bring edges together for welding - Google Patents
Thick wall welded pipe bend - has single flat blank bent by doubly curved ram to bring edges together for weldingInfo
- Publication number
- DE2712453A1 DE2712453A1 DE19772712453 DE2712453A DE2712453A1 DE 2712453 A1 DE2712453 A1 DE 2712453A1 DE 19772712453 DE19772712453 DE 19772712453 DE 2712453 A DE2712453 A DE 2712453A DE 2712453 A1 DE2712453 A1 DE 2712453A1
- Authority
- DE
- Germany
- Prior art keywords
- pipe bend
- core
- bend
- ram
- die
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
- B21C37/286—Making tube fittings for connecting pipes, e.g. U-pieces starting from sheet material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Verfahren zur Herstellung von geschweißten Rohrbogen mitProcess for the production of welded elbows with
großen Wandstärken und Kennweiten i)ie Erfindung betrifft ein Verfahren zur Herstellung von Ueschweißten Rohrbogen mit großen wandstärken und Kennweiten, oei dem ein der Abwickl des bogens entsprechend zuKeschnittener Blechrohling gleichzeitig um seine Längsachse U-förmig und um seine Querachse bogenförmig gestaltet wird, wonach die Schenkellappen des so entstandenen Bogenrohlings gegeneinander gebogen und schließlich an der verbleibenden Längsnaht miteinander verschweißt werden.large wall thicknesses and characteristics i) The invention relates to a method for the production of welded pipe bends with large wall thicknesses and characteristic diameters, One of the unwinding of the sheet corresponding to the cut sheet metal blank at the same time is U-shaped around its longitudinal axis and curved around its transverse axis, after which the thigh flaps of the resulting arch blank are bent against each other and finally welded to one another at the remaining longitudinal seam.
Bekannt ist ein solches Herstellungsverfahren für winkelförmige Rohrbogenstücke mit Innengewlnde (Fittings). Hierbei erfolgt die gleichzeige Überführung des Blechrohlings in die U- und Knie form unter Verdrängung des überflüssigen Werkstoffes an der Gehrung durch Ziehen in einem am oberen Teil parallelwandigen Gesenk mittels eines ebenfalls i oberen Teil parallelwandigen Stempels (erster Arbeitsgang) und nach einlegen eines winkelförmigen quergeteilten Rundkernes in das Zwischenstück (zweiter Arbeitsgang) die Überführung der ebenen Schenkellappen in die Rohrform durch Einwärtsrollen der Lappen mittels eines parallel zur Schenkelebene geführten Stempels (dritter Arbeitsgang).Such a manufacturing process for angular pipe bends is known with internal threads (fittings). The same transfer of the sheet metal blank takes place here into the U- and knee shape, displacing the superfluous material at the miter by drawing in a parallel-walled die at the upper part by means of a likewise i upper part of parallel-walled stamp (first step) and after inserting one angled transversely divided round core into the intermediate piece (second work step) the transfer of the flat leg flaps into the tubular shape by rolling inwards the Flap using a punch parallel to the plane of the leg (third operation).
Demgegenüber besteht die Aufgabe der Erfindung darin, dieses bekannte Verfahren nicht nur durch Einsparung eines Arbeitsganges zu vereinfachen, sondern dieses auch gleichzeitig für die Herstellung von GroJrohrbogen mit dicken Wandstärken nutzbar zu machen, an die z.U. im Kernkraftwerksbau hohe Anforderungen im Hinblick auf die Gleichmäßigkeit der Wandstärken und dem Anteil der Schweißkante gestellt werden.In contrast, the object of the invention is this known Process not only by saving one work step to simplify but also at the same time for the production of large pipe bends with thick ones To make wall thicknesses usable, to which z.U. high requirements in nuclear power plant construction with regard to the uniformity of the wall thicknesses and the proportion of the welding edge be asked.
Zur Lössung dieser Aufgabe dient ein Herstellungverfahren für rohrbogen der eingangs beschriebenen Art, das dadurch gekennzeichnet ist, daß der Stempel des Gesenkes zur gleichzeitigen @berfuhrung des btechrohlings in die U- und Bogenform als zylindrischer Bogenkern gestaltet ist, an den sich die beim Verformen des Blechrohtings seitlich hochschiebenden Schenkellappen weitgehend ohne Spannung anlehnen und durch eine dem Bogenkern angepaßte Druckrolle vollends zum Rohrbogen verformt werden.A manufacturing process for pipe bends is used to solve this problem of the type described above, which is characterized in that the stamp of the die for the simultaneous transfer of the btech blank into the U and arch shape is designed as a cylindrical arc core to which the sheet metal blank is deformed Lean on and through the thigh flaps that slide up to the side, largely without tension a pressure roller adapted to the arch core can be completely deformed into a pipe bend.
Nach einem weiteren @erkmal der Erfindung ist der zylindrische Bogenkern mit seinen seitlich abgeflachten Enden in einem gabelförmigen Stempelhalter lösbar gelagert, der nach dem ersten Verformungsschritt vom Bogenkern gelöst wird und den Hubweg für die Druckrolle freigibt; anschließend werden Stempelnalter und Bogenkern wieder miteinander verbunden und gemeinsam mit dem Rohrbogen aus dem Gesenk herausgezogen; nunmehr wird der vom Stempelhalter getrennte Bogenkern aus dem Rohrbogen entfernt; das ist, wie Versuche gezeigt haben, leicht möglich, weil sich der Rohrbogenronling nach dem Herausnehmen aus dem Gesenk infolge Membranwirkung leicht aufweitet.According to a further feature of the invention is the cylindrical arch core detachable with its laterally flattened ends in a fork-shaped punch holder stored, which is released from the arc core after the first deformation step and the Releases stroke path for the pressure roller; then stamp age and arch core reconnected and pulled out of the die together with the pipe bend; now the arc core separated from the punch holder is removed from the pipe bend; As tests have shown, this is easily possible because the pipe bend blank after being removed from the die, it expands slightly as a result of the membrane effect.
Ein Ausfahrungsbeispiel von den Vorrichtungen zur Durchführung des erfindungsgemaßen Verfahrens sind auf der Zeichnung veranschaulicht und die einzelnen Verfahrensschritte nachfolgend erläutert, es zeigen: Fig.1 einen Blechrohling für einen Hohrbogen, Fig.2 ein in einem gabelförmigen Stempelhalter befestigter Bogenkern, ?ig.5 eine Seitenansicht von Fig.2, Fig.4 ein Gesenk mit aufgelegtem Blechrohling, Fig.5 einen Schnitt nach der Linie A-A von Fig.4, Fig.6 einen Querschnitt durch Gesenk und Bogenkern mit Rohrbogen, strichpunktiert gezeichnet nach dem ersten und ausgezogen gezeichnet nach dem zweiten Arbeitsgang, b'ig.7 einen Schnitt nach der Linie B-B von Fig.6, Fig.8 die Druckrolle zur Vollendung des Rohrbogens und Figo9 eine Seitenansicht von Fig.8.An Ausfahrungsbeispiel of the devices for the implementation of the inventive method are illustrated in the drawing and the individual Process steps explained below, they show: Fig.1 a Sheet metal blank for a Hohrbogen, Fig.2 in a fork-shaped punch holder attached arc core,? ig.5 a side view of Fig.2, Fig.4 a die with placed sheet metal blank, Figure 5 a section along the line A-A of Figure 4, Figure 6 a cross-section through the die and arch core with pipe bend, drawn in dash-dotted lines after the first and drawn drawn after the second step, b'ig.7 one Section along the line B-B of Fig.6, Fig.8 the pressure roller to complete the pipe bend and FIG. 9 is a side view of FIG.
Nach dem Auflegen des Blechrohlings 1 auf das Gesenk 2 fährt der im Stempelhalter 3 gelagerte Bogenkern 4 in Richtung C abwärts und verformt den Blechrohling wie in Fig.6 strichpunktiert gezeichnet dargestellt; dann wird der Stempelhalter 3 vom Bogenkern 4 gelöst und die Druckrolle 5 in Richtung D gefahren; dabei werden die Schenkellappen 6 auf dem Bogenkern 4 zum Rohrbogen 7 verformt, ausgezogen gezeichnet.After placing the sheet metal blank 1 on the die 2, the im Stamp holder 3 supported arc core 4 downwards in direction C and deforms the sheet metal blank as shown in Figure 6 drawn in dash-dotted lines; then the punch holder 3 released from the arc core 4 and the pressure roller 5 moved in direction D; be there the leg flaps 6 deformed on the arc core 4 to form the pipe bend 7, drawn in solid lines.
L e e r s e i t eL e r s e i t e
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772712453 DE2712453A1 (en) | 1977-03-22 | 1977-03-22 | Thick wall welded pipe bend - has single flat blank bent by doubly curved ram to bring edges together for welding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772712453 DE2712453A1 (en) | 1977-03-22 | 1977-03-22 | Thick wall welded pipe bend - has single flat blank bent by doubly curved ram to bring edges together for welding |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2712453A1 true DE2712453A1 (en) | 1978-09-28 |
Family
ID=6004291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19772712453 Pending DE2712453A1 (en) | 1977-03-22 | 1977-03-22 | Thick wall welded pipe bend - has single flat blank bent by doubly curved ram to bring edges together for welding |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2712453A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009017571A1 (en) * | 2009-04-17 | 2010-11-11 | Eads Deutschland Gmbh | Pipe bends producing method, involves forming molding surface of one press tool part by end portions of sheet material during locking of press tool parts until final shape of pipe bend results |
CN103894444A (en) * | 2014-03-06 | 2014-07-02 | 燕山大学 | Single-welding bend pressing and molding method |
-
1977
- 1977-03-22 DE DE19772712453 patent/DE2712453A1/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009017571A1 (en) * | 2009-04-17 | 2010-11-11 | Eads Deutschland Gmbh | Pipe bends producing method, involves forming molding surface of one press tool part by end portions of sheet material during locking of press tool parts until final shape of pipe bend results |
DE102009017571B4 (en) * | 2009-04-17 | 2016-09-22 | Airbus Defence and Space GmbH | Method and device for the production of pipe bends or pipe bend segments by forming, as well as correspondingly produced pipe bends or pipe bend segments |
CN103894444A (en) * | 2014-03-06 | 2014-07-02 | 燕山大学 | Single-welding bend pressing and molding method |
CN103894444B (en) * | 2014-03-06 | 2016-08-17 | 燕山大学 | Single weld-seam bend method for press forming |
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Legal Events
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OAP | Request for examination filed | ||
OD | Request for examination | ||
OHN | Withdrawal |