EP0826439B1 - Method for bending a tube, device for carrying-out the method as well as a corner piece manufactured by this method - Google Patents

Method for bending a tube, device for carrying-out the method as well as a corner piece manufactured by this method Download PDF

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Publication number
EP0826439B1
EP0826439B1 EP97810627A EP97810627A EP0826439B1 EP 0826439 B1 EP0826439 B1 EP 0826439B1 EP 97810627 A EP97810627 A EP 97810627A EP 97810627 A EP97810627 A EP 97810627A EP 0826439 B1 EP0826439 B1 EP 0826439B1
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EP
European Patent Office
Prior art keywords
bending
tube
bending edge
fold
edge
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.)
Expired - Lifetime
Application number
EP97810627A
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German (de)
French (fr)
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EP0826439A1 (en
Inventor
Rudolf Tschopp
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Individual
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    • 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
    • B21D53/00—Making other particular articles
    • B21D53/74—Making other particular articles frames for openings, e.g. for windows, doors, handbags
    • 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

Definitions

  • the invention relates to a method for bending a cross section essentially rectangular with a protruding one Folded tube according to the preamble of claim 1.
  • the invention has for its object a method of to create the more uniform bends and especially corners with a much smaller bending radius allows.
  • the method according to the invention results from claim 1.
  • tubes with a fold, so-called flap tubes at right angles be bent, the bending radius being essentially zero.
  • It can be used in particular to produce frames that frame composed of individual profile pieces very similar are.
  • the production is much easier and therefore cost-effective. It has been shown that frames with small masses, for example, from 15 to 10 centimeters with the. Processes according to the invention can be produced.
  • the inventive The method is particularly suitable for the production of Grid elements, the grid on the inwardly projecting Seam is welded on.
  • the Pipe is a profiled tube made of sheet metal, with which Fig. 1 apparent cross section.
  • the tube 1 is as can be seen essentially rectangular and flat oval in cross section.
  • On Fold 2 is substantially coplanar with one perpendicular to the bend edge oriented tube outer surface 4.
  • An opposite of the fold 2 Have edge 32 and a subsequent edge 33 a significantly smaller bending radius than a third edge 34.
  • the outer surface 4 and the opposite Outer surface 22 much narrower than that too opposite outer surfaces 21 and 23.
  • the fold 2 is on its free and straight edge 18 as can be seen with a Strip hump 19 provided.
  • the corner 30 connects the two pipe sections 6 and 7, the Edges 18. essentially in the bending center B (Fig. 1a) intersect and on the bisector W each corner 30 one form narrow furrow-like upsetting 31. Starting from the bending center As can be seen, B is essentially the bending radius Zero.
  • the corner 30 is comparable to one corner, the one with two pipe sections provided with miter cuts.
  • the elbow formed from the tube 1 is in a preferred one 2, a frame 16, the four rectangular Has corners 30 and on a joint 29 with an inserted Connector 37 is connected.
  • a frame 16 In the frame 16 is a Grid 17 used.
  • This grid 17 is by spot welding on its edge also on the underside of the strip hump 19 welded.
  • the strip boss 19 enables an accurate and defined spot welding.
  • the grid 17 can be different formed and also by a sheet, in particular a perforated sheet 39 or be replaced by a transparent plate 40.
  • FIG. 4 show the pipe 1 to be bent, which is for bending around an edge 3 between an edge support 24, first means 8 and second Means 9 is firmly clamped.
  • the tube 1 is with the above Means 8 and 24 slidably guided on the pipe section 6, while the second pipe section 7 is held by third means 10 is.
  • the first means 8 bring the pipe section 6 into abutment to the bending edge 3, such that the tube longitudinal axis 5 is at right angles is oriented to the bending edge 3.
  • the second means 9 lead the Pipe sections 6 and 7.
  • the third means 10 are as mentioned with the pipe section 7, which leads away from the bending edge 3, firmly connected.
  • an impact body 25 is arranged on the Bottom has an oblique striking edge 26 and in the direction of the double arrow 27 according to FIG. 4 through an opening 36 of the Means 9 movable against the edge 18 and away from it is.
  • This impact body 25 is followed by a powerful one downward movement of the fold 2 acted on the edge 18 and notched.
  • the force points in the direction in which the fold 2 has to buckle during the bending process.
  • Pipe section 7 pivoted about the bending edge, for example by 90 °. 5 and 6 show the bent tube 1.
  • Die Means 8, 9 and 10 and a holder 35 are after the bending process from the bent pipe 1 to carry out a further bending process returned to a position not shown here.
  • the person skilled in the art is familiar with means 8 to 9 and 10 and 32 are to be trained and can be moved automatically.
  • the method allows the outer surface 21 to be in a frame 16 is exactly at right angles to the plane of the grid 17 or of the sheets 39 and 40.
  • a formed from the tube 1 by the method according to the invention Angle piece, in particular a frame 16, stands out on the one hand through a very high stability in the longitudinal direction as well as the sharp and regular corners 30.
  • the making of a Frame 16 is much easier and less time consuming than the welding of individual miter cut pipe sections.
  • the manufacture of the frame 16 is also by the Connect the butt 29 with an inserted connector 37 simplified. Only the grid 17 is welded on what as mentioned above by the cranked fold 2 reliable and can be done safely.
  • a preferred product of the invention The method is the grid element 38 shown in FIG. 2, in very different and especially comparative terms small masses can be produced and not only through high stability and light weight, but also by is characterized by a high level of planarity.

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

Abstract

The method concerns bending of a pipe (1) with a rectangular cross section and a protruding fold (2) which adjoins a pipe outer surface (4) oriented perpendicular to the bending edge, and is compressed during the bending process. The method is characterised by the fact that before or at the start of the bending process, the fold is subjected to a force and is notched on the bending angle bisector intersecting with the bending edge. This force has the same direction as the fold bulge (31) being formed during bending. Also claimed, in addition to an apparatus summarized below, is a resultant angle piece.

Description

Die Erfindung betrifft ein Verfahren zum Biegen eines im Querschnitt im wesentlichen rechteckigen mit einem vorstehenden Falz versehenen Rohres gemäss Oberbegriff des Anspruchs 1.The invention relates to a method for bending a cross section essentially rectangular with a protruding one Folded tube according to the preamble of claim 1.

Im Stand der Technik ist das Biegen von Profilrohren um 90° bekannt und dann einfach, wenn an die Ausgestaltung der Ecken keine besonderen Anforderungen gestellt sind. Es lassen sich auch Rohre biegen, die im Querschnitt im wesentlichen rechteckig sind und einen vorstehenden Falz aufweisen. Ein solches nach dem Stand der Technik gebogenes Rohr weist jedoch eine Ecke auf, die. einen vergleichsweise grossen Biegeradius besitzt und das in der Ecke oft zufällig und ästhetisch nicht befriedigend gestaucht ist. Ein solchermassen zu einem Rahmen gebogenes Rohr eignet sich deshalb in vielen Fällen nicht. Bisher wurden deshalb solche Rahmen aus Profilrohren durch Zusammenschweissen gerader Profilabschnitte hergestellt.The bending of profile tubes by 90 ° is in the prior art known and then easy when the design of the corners there are no special requirements. It can be also bend pipes that are substantially rectangular in cross section are and have a protruding fold. Such after Prior art bent tube, however, has a corner that. has a comparatively large bending radius and that in the Corner often compressed accidentally and not aesthetically satisfactory is. Such a tube bent into a frame is suitable therefore in many cases not. So far, therefore Frame made of profile tubes by welding straight profile sections together manufactured.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der genannten Art zu schaffen, das gleichmässigere Biegungen und insbesondere Ecken mit einem wesentlich kleineren Biegeradius ermöglicht. The invention has for its object a method of to create the more uniform bends and especially corners with a much smaller bending radius allows.

Das erfindungsgemässe Verfahren ergibt sich aus Anspruch 1. Mit dem erfindungsgemässen Verfahren können mit einem Falz versehene Rohre, sogenannte Lappenrohre rechtwinklig gebogen werden, wobei der Biegeradius im wesentlichen Null ist. Es lassen sich damit insbesondere Rahmen herstellen, die einem aus einzelnen Profilstücken zusammengesetzten Rahmen sehr ähnlich sind. Die Herstellung ist aber wesentlich einfacher und damit kostengünstiger. Es hat sich gezeigt, dass auch Rahmen mit kleinen Massen beispielsweise von 15 auf 10 Zentimetern mit den . erfindungsgemässen Verfahren herstellbar sind. Das erfindungsgemässe Verfahren eignet sich insbesondere zum Herstellen von Gitterelementen, wobei das Gitter an dem nach innen vorstehenden Falz angeschweisst wird.The method according to the invention results from claim 1. With the method according to the invention tubes with a fold, so-called flap tubes at right angles be bent, the bending radius being essentially zero. It can be used in particular to produce frames that frame composed of individual profile pieces very similar are. The production is much easier and therefore cost-effective. It has been shown that frames with small masses, for example, from 15 to 10 centimeters with the. Processes according to the invention can be produced. The inventive The method is particularly suitable for the production of Grid elements, the grid on the inwardly projecting Seam is welded on.

Eine vorteilhafte Vorrichtung zur Durchführung des Verfahrens ergibt sich aus dem Anspruch 4.An advantageous device for performing the method results from claim 4.

Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
eine räumliche Darstellung eines Abschnittes eines erfindungsgemässen Winkelstücks,
Fig. 1a
eine weitere Ansicht des Winkelstücks gemäss Fig. 1,
Fig. 2
ein Gitterelement mit einem als Rahmen ausgebildeten Winkelstück gemäss der Erfindung,
Fig. 3 bis 6
schematisch die einzelnen Schritte des erfindungsgemässen Verfahrens.
The invention is explained below with reference to the drawing. Show it:
Fig. 1
3 shows a spatial representation of a section of an angle piece according to the invention,
Fig. 1a
1 shows another view of the contra-angle handpiece according to FIG.
Fig. 2
a grid element with an angle piece designed as a frame according to the invention,
3 to 6
schematically the individual steps of the inventive method.

Die Fig. 1 und 1a zeigen einen Abschnitt eines Winkelstücks, das aus einem Rohr 1 hergestellt ist und das eine Ecke 30 aufweist, welche durch Biegen des Rohres 1 um 90° hergestellt wurde. Das Rohr ist ein aus Blech hergestelltes Profilrohr, mit dem aus Fig. 1 ersichtlichen Querschnitt. Das Rohr 1 ist wie ersichtlich im Querschnitt im wesentlichen rechteckig und flachoval. Ein Falz 2 ist im wesentlichen koplanar zu einer zur Biegekante rechtwinklig orientierten Rohraussenfläche 4. Eine dem Falz 2 gegenüberliegende Kante 32 sowie eine nachfolgende Kante 33 besitzen einen wesentlich kleineren Biegeradius als eine dritte Kante 34. Wie ersichtlich, sind die Aussenfläche 4 sowie die gegenüberliegende Aussenfläche 22 wesentlich schmaler als die ebenfalls gegenüberliegenden Aussenflächen 21 und 23. Der Falz 2 ist an seinem freien und geraden Rand 18 wie ersichtlich mit einem Streifenbuckel 19 versehen.1 and 1a show a portion of an elbow, the is made from a tube 1 and has a corner 30, which was produced by bending the tube 1 by 90 °. The Pipe is a profiled tube made of sheet metal, with which Fig. 1 apparent cross section. The tube 1 is as can be seen essentially rectangular and flat oval in cross section. On Fold 2 is substantially coplanar with one perpendicular to the bend edge oriented tube outer surface 4. An opposite of the fold 2 Have edge 32 and a subsequent edge 33 a significantly smaller bending radius than a third edge 34. As can be seen, the outer surface 4 and the opposite Outer surface 22 much narrower than that too opposite outer surfaces 21 and 23. The fold 2 is on its free and straight edge 18 as can be seen with a Strip hump 19 provided.

Die Ecke 30 verbindet die beiden Rohrabschnitte 6 und 7, deren Kanten 18. sich im wesentlichen im Biegezentrum B (Fig. 1a) schneiden und die auf der Winkelhalbierenden W jede Ecke 30 eine schmale furchenartige Stauchung 31 bilden. Ausgehend vom Biegezentrum B ist wie ersichtlich der Biegeradius im wesentlichen Null. Die Ecke 30 ist vergleichbar mit einer Ecke, die mit zwei mit Gehrungsschnitten versehenen Rohrabschnitten hergestellt ist. The corner 30 connects the two pipe sections 6 and 7, the Edges 18. essentially in the bending center B (Fig. 1a) intersect and on the bisector W each corner 30 one form narrow furrow-like upsetting 31. Starting from the bending center As can be seen, B is essentially the bending radius Zero. The corner 30 is comparable to one corner, the one with two pipe sections provided with miter cuts.

Das aus dem Rohr 1 gebildete Winkelstück ist in einer bevorzugten Ausführung gemäss Fig. 2 ein Rahmen 16, der vier rechtwinklige Ecken 30 aufweist und an einem Stoss 29 mit einem gesteckten Verbindungsstück 37 verbunden ist. Selbstverständlich sind auch andere Rahmenformen möglich und der Winkel an den Ecken kann auch grösser oder kleiner sein als 90°. In den Rahmen 16 ist ein Gitter 17 eingesetzt. Dieses Gitter 17 ist durch Punktschweissung an seinem Rand auch an der Unterseite des Streifenbuckels 19 angeschweisst. Der Streifenbuckel 19 ermöglicht eine genaue und definierte Punktschweissung. Das Gitter 17 kann unterschiedlich ausgebildet und auch durch ein Blech insbesondere ein Lochblech 39 oder durch eine durchsichtige Platte 40 ersetzt sein.The elbow formed from the tube 1 is in a preferred one 2, a frame 16, the four rectangular Has corners 30 and on a joint 29 with an inserted Connector 37 is connected. Of course, too other frame shapes possible and the angle at the corners can also be larger or smaller than 90 °. In the frame 16 is a Grid 17 used. This grid 17 is by spot welding on its edge also on the underside of the strip hump 19 welded. The strip boss 19 enables an accurate and defined spot welding. The grid 17 can be different formed and also by a sheet, in particular a perforated sheet 39 or be replaced by a transparent plate 40.

Wesentlich ist das Verfahren zum Biegen des Rohres 1, das nachfolgend anhand der Fig. 3 bis 6 näher erläutert wird. Die Fig. 3 und 4 zeigen das zu biegende Rohr 1, das zum Biegen um eine Kante 3 zwischen einem Kantenträger 24, ersten Mitteln 8 und zweiten Mitteln 9 fest eingespannt ist. Das Rohr 1 ist mit den genannten Mitteln 8 und 24 am Rohrabschnitt 6 gleitend geführt, während der zweite Rohrabschnitt 7 mit dritten Mitteln 10 festgehalten ist. Die ersten Mittel 8 bringen den Rohrabschnitt 6 in Anschlag zur Biegekante 3, derart, dass die Rohrlängsachse 5 rechtwinklig zur Biegekante 3 orientiert ist. Die zweiten Mittel 9 führen die Rohrabschnitte 6 und 7. Die dritten Mittel 10 sind wie erwähnt mit dem Rohrabschnitt 7, der von der Biegekante 3 wegführt, fest verbunden. What is essential is the method for bending the tube 1, which follows 3 to 6 will be explained in more detail. 3 and Fig. 4 show the pipe 1 to be bent, which is for bending around an edge 3 between an edge support 24, first means 8 and second Means 9 is firmly clamped. The tube 1 is with the above Means 8 and 24 slidably guided on the pipe section 6, while the second pipe section 7 is held by third means 10 is. The first means 8 bring the pipe section 6 into abutment to the bending edge 3, such that the tube longitudinal axis 5 is at right angles is oriented to the bending edge 3. The second means 9 lead the Pipe sections 6 and 7. The third means 10 are as mentioned with the pipe section 7, which leads away from the bending edge 3, firmly connected.

Über dem Rand 18 ist ein Schlagkörper 25 angeordnet, der an der Unterseite eine schräge Schlagkante 26 aufweist und der in Richtung des Doppelpfeiles 27 gemäss Fig. 4 durch eine Öffnung 36 der Mittel 9 hindurch gegen den Rand 18 und von diesem weg bewegbar ist. Mit diesem Schlagkörper 25 wird durch eine kräftige nach unten gerichtete Bewegung der Falz 2 am Rand 18 beaufschlagt und gekerbt. Die Kraft weist in die Richtung, in die der Falz 2 während des Biegevorganges wegzuknicken hat. Nach dieser Beaufschlagung oder gleichzeitig wird der von der Biegekante 3 wegführende Rohrabschnitt 7 um die Biegekante geschwenkt, beispielsweise um 90°. Die Fig. 5 und 6 zeigen das gebogene Rohr 1. Die Mittel 8, 9 und 10 sowie ein Halter 35 werden nach dem Biegevorgang vom gebogenen Rohr 1 zur Ausführung eines weiteren Biegevorganges in eine hier nicht gezeigte Stellung zurückgefahren. Dem Fachmann ist geläufig, wie die Mittel 8 bis 9 und 10 sowie 32 auszubilden sind und automatisch bewegt werden können. Das Verfahren ermöglicht, dass die Aussenfläche 21 bei einem Rahmen 16 ringsum genau rechtwinklig ist zur Ebene des Gitters 17 oder der Bleche 39 bzw. 40.Above the edge 18, an impact body 25 is arranged on the Bottom has an oblique striking edge 26 and in the direction of the double arrow 27 according to FIG. 4 through an opening 36 of the Means 9 movable against the edge 18 and away from it is. This impact body 25 is followed by a powerful one downward movement of the fold 2 acted on the edge 18 and notched. The force points in the direction in which the fold 2 has to buckle during the bending process. After this loading or at the same time the leading away from the bending edge 3 Pipe section 7 pivoted about the bending edge, for example by 90 °. 5 and 6 show the bent tube 1. Die Means 8, 9 and 10 and a holder 35 are after the bending process from the bent pipe 1 to carry out a further bending process returned to a position not shown here. The person skilled in the art is familiar with means 8 to 9 and 10 and 32 are to be trained and can be moved automatically. The The method allows the outer surface 21 to be in a frame 16 is exactly at right angles to the plane of the grid 17 or of the sheets 39 and 40.

Ein nach dem erfindungsgemässen Verfahren aus dem Rohr 1 gebildetes Winkelstück, insbesondere ein Rahmen 16 zeichnet sich einerseits durch eine sehr hohe Stabilität in Längsrichtung sowie die scharfen und regelmässigen Ecken 30 aus. Die Herstellung eines Rahmens 16 ist wesentlich einfacher und weniger zeitaufwendig als das Verschweissen einzelner auf Gehrung geschnittener Rohrabschnitte. Die Herstellung des Rahmens 16 wird zudem durch das Verbinden des Stosses 29 mit einem gesteckten Verbindungsstück 37 vereinfacht. Lediglich das Gitter 17 wird angeschweisst, was wie oben erwähnt durch den abgekröpften Falz 2 zuverlässig und sicher erfolgen kann. Ein bevorzugtes Erzeugnis des erfindungsgemässen Verfahrens ist das in Fig. 2 gezeigte Gitterelement 38, das in sehr unterschiedlichen und insbesondere auch vergleichsweise kleinen Massen herstellbar ist und sich nicht nur durch eine hohe Stabilität und geringes Gewicht, sondern auch durch eine hohe Planarität auszeichnet.A formed from the tube 1 by the method according to the invention Angle piece, in particular a frame 16, stands out on the one hand through a very high stability in the longitudinal direction as well as the sharp and regular corners 30. The making of a Frame 16 is much easier and less time consuming than the welding of individual miter cut pipe sections. The manufacture of the frame 16 is also by the Connect the butt 29 with an inserted connector 37 simplified. Only the grid 17 is welded on what as mentioned above by the cranked fold 2 reliable and can be done safely. A preferred product of the invention The method is the grid element 38 shown in FIG. 2, in very different and especially comparative terms small masses can be produced and not only through high stability and light weight, but also by is characterized by a high level of planarity.

Claims (8)

  1. Process for bending a cross-sectionally essentially rectangular tube (1) provided with a projecting fold (2), the fold adjoining, in a coplanar manner, one of the outer tube surfaces (4) oriented at right angles to the bending edge (3), and being compressed during the bending operation, characterized in that prior to, or at the beginning of, the bending operation the fold is subjected to a force, and notched, on the bending-angle bisector which intersects the bending edge (3), the force being oriented in the direction in which the fold has to bend away during the bending operation.
  2. Process according to Claim 1, characterized in that the tube is brought into abutment, by way of one of its planar outer surfaces, against a bending edge such that the longitudinal axis (5) of the tube is oriented at right angles to the bending edge (3), and that, thereafter, one of the two tube sections (6, 7) leading away from the bending edge (3) is secured in captive fashion and the other tube section is pivoted by the defined angle around the bending edge.
  3. Process according to Claim 2, characterized in that, during the bending operation, the outer surface (4) which belongs to the tube (1) and butts against the bending edge (3) is subjected to pressure, such that it does not bulge out, in the region of the bending edge (3), and the same applies to the outer tube surface located opposite the same and/or to the two outer tube surfaces which are oriented at right angles to the bending edge.
  4. Apparatus which is intended for bending a cross-sectionally essentially rectangular tube provided with a projecting fold and for carrying out the process according to Claim 1 or 2, the following means being provided: a bending edge (3); first means (8), in order for a cross-sectionally essentially rectangular tube (1) provided with a projecting fold to be brought into abutment, by way of one of its outer surfaces (23), against the bending edge (3) such that both the longitudinal axis (5) of the tube and the fold (2) are oriented at right angles to the bending edge (3); second means (9), in order for one of the two tube sections (6) leading away from the bending edge to be secured with sliding action; and third means (10), in order for the other tube section (7) leading away from the bending edge to be bent through a defined angle, characterized by a striking body (25), which can be moved parallel to the bending edge and which acts on the fold (2), and notches it, on its border (18).
  5. Apparatus according to Claim 4, characterized in that an edge support (24) has a stop surface (11), which contains or forms the bending edge (3), and, at right angles thereto, a bearing surface (12) which is firmly connected thereto, the stop surface (11) having located opposite, and parallel to, it a surface (13), which can be adjusted in terms of spacing, in order to secure a tube section (6) with sliding action.
  6. Apparatus according to Claim 4 or 5, characterized in that the second means (9) have a surface which is parallel to the stop surface (11), and can be adjusted in terms of spacing, in order to secure a tube section (6) with sliding action.
  7. Apparatus according to one of Claims 4 to 6, characterized in that the third means (10) secure in captive fashion the tube section (7) which is to be bent.
  8. Apparatus according to one of Claims 4 to 7, characterized in that provided in the region of the bending edge (3) are pressure-exerting surfaces (15) which are parallel to the bearing surface (12) and, during a bending operation, subject the tube (1) to such a pressure that it is not possible for the tube surfaces parallel to the bearing surface to bulge out.
EP97810627A 1996-09-02 1997-09-02 Method for bending a tube, device for carrying-out the method as well as a corner piece manufactured by this method Expired - Lifetime EP0826439B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH215196 1996-09-02
CH02151/96A CH691795A5 (en) 1996-09-02 1996-09-02 A method for bending a pipe, An apparatus for performing the method and a product produced by the process element.
CH2151/96 1996-09-02

Publications (2)

Publication Number Publication Date
EP0826439A1 EP0826439A1 (en) 1998-03-04
EP0826439B1 true EP0826439B1 (en) 2003-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810627A Expired - Lifetime EP0826439B1 (en) 1996-09-02 1997-09-02 Method for bending a tube, device for carrying-out the method as well as a corner piece manufactured by this method

Country Status (4)

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EP (1) EP0826439B1 (en)
AT (1) ATE237415T1 (en)
CH (1) CH691795A5 (en)
DE (1) DE59709827D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009004674A1 (en) * 2009-01-12 2010-07-15 Wuppermann Rohrtechnik Gmbh Device and method for bending a profile and curved profile
DE202018103022U1 (en) * 2018-05-30 2019-09-02 Grass Gmbh Wall for a furniture or furniture part
DE102019130078A1 (en) * 2019-11-07 2021-05-12 Auto-Kabel Management Gmbh Motor vehicle power line and a method for bending a motor vehicle power line

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1545021A (en) * 1925-03-18 1925-07-07 George W Wells Sheet-metal window panel and method of making the same
US3042099A (en) * 1959-04-23 1962-07-03 Hoover Ball & Bearing Co Method of bending tubular members
US3435511A (en) * 1966-01-11 1969-04-01 Spectronics Corp Method of making x-ray cassette
FR1512351A (en) * 1966-05-16 1968-02-09 Seine Const Elec Improvements to devices for making curved angles and to the products obtained
DE1752270C3 (en) * 1968-04-27 1977-10-06 Robert Bosch Gmbh, 7000 Stuttgart Device for forming a corner with a very small corner radius on a preformed sheet metal part
DE4402726A1 (en) * 1994-01-29 1995-08-10 Bayer Isolierglasfab Kg Method and device for producing a spacer frame for insulating glass panes

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Publication number Publication date
DE59709827D1 (en) 2003-05-22
CH691795A5 (en) 2001-10-31
EP0826439A1 (en) 1998-03-04
ATE237415T1 (en) 2003-05-15

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