EP0780173A2 - Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby - Google Patents
Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby Download PDFInfo
- Publication number
- EP0780173A2 EP0780173A2 EP96119402A EP96119402A EP0780173A2 EP 0780173 A2 EP0780173 A2 EP 0780173A2 EP 96119402 A EP96119402 A EP 96119402A EP 96119402 A EP96119402 A EP 96119402A EP 0780173 A2 EP0780173 A2 EP 0780173A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- welded
- finished
- pipe branch
- bent
- winding part
- 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- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
- B21C37/29—Making branched pieces, e.g. T-pieces
-
- 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
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
Definitions
- the invention relates to a method for producing a pipe part, in particular a manifold pipe branch of a motor vehicle exhaust system, and a manifold pipe branch produced by this method.
- a manifold pipe branch To produce a manifold pipe branch, it is known to insert a straight or curved pipe with a lateral mandrel opening as a semifinished product into a calibration mold, the inner contour of which corresponds to the outside target contour of the manifold pipe branch to be produced.
- the tube introduced into the calibration mold is closed pressure-tight at its ends, a pressure medium source being connected at least to one pressure-tight tube end.
- a preferably liquid pressure medium, in particular a water-oil emulsion is then pressed from a pressure source into the interior of the tube under high pressure and the tube is calibrated into the mold by the internal pressure.
- the deformed tube is then removed from the calibration mold and, if necessary, cut to the end with flat or oblique cuts.
- the manufacturing process is generally known as the so-called high pressure process. It has the disadvantage of being comparatively complex Manufacturing and is therefore comparatively expensive. It is also only possible to produce pipe parts which are asymmetrical to a limited extent, for example an exhaust system of a motor vehicle, provided that the one-piece design is not dispensed with.
- the object of the invention is to provide a method of the type mentioned at the outset which enables simple and reliable manufacture of a pipe part, in particular a manifold pipe branch.
- An elbow pipe branch produced according to the invention is characterized by the features of claim 4, advantageously further developed by the features of claims 5 to 9.
- the essence of the invention is the production of manifold pipe branches and the like according to a special winding technique while avoiding the internal high-pressure process.
- a sheet metal coil or blank blank is deep-drawn in a progressive tool and trimmed to form a semi-finished tube part which corresponds to the developed shape of the finished tube part. Then, in further procedural steps, the semi-finished tube part is pre-bent and wound in the progressive tool and the finally bent winding part is welded gas-tight in its bent middle contact area.
- the bent, welded winding part can possibly be subjected to a calibration process in order to obtain the final inner fit.
- the welding process is carried out by setting in particular a continuous weld or fillet in the bent contact area of a winding part, in particular by compressing the contact area in order to overcome the restoring force in the opening direction of the pipe sections bent towards one another.
- a manifold pipe branch of a motor vehicle exhaust system is preferably produced in the form of a welded, one-piece winding part with an essentially straight pipe section and at least one lateral pipe branch section, wherein a completely bent winding part can have two short rims in its central contact area, which are welded on the end face by means of a weld seam are.
- a short shelf and a longer shelf can also be provided, which are welded to one another laterally by means of a fillet weld.
- the finished bent winding part can also engage in a box shape in its middle contact area and be welded there with a fillet weld.
- elbow pipe branch in the intermediate region between the straight pipe section and the lateral pipe section is designed to be flush with one another and has a closed contour which is provided with a weld seam. This enables a weld seam that is particularly easy to set when a weld is created gas-tight connection in a difficult welding area.
- manifold pipe branches can be easily manufactured, which are double-walled.
- FIGS. 1 to 3 a manifold pipe branch 1 of a motor vehicle exhaust system is shown schematically in different manufacturing stages according to FIGS. 1 to 3, with FIGS. 4 to 7 showing different details.
- the manifold pipe branch is not manufactured according to the internal high-pressure process, but according to a special winding process.
- a sheet metal plate / circuit board or a coil is used as the starting material, which is shaped, stamped and / or trimmed in a complex progressive tool 4, which is only shown schematically.
- the progressive tool 4 comprises a base plate and a head plate and various interchangeable individual tools.
- a semi-finished tube part 5 is already shown in the form of a trimmed deep-drawn part made of sheet metal, which has arisen from the board in the progressive tool.
- the semifinished product corresponds to the developed form of the tubular part end product, namely the elbow pipe branch 1.
- the mandrel 14 has an outer diameter which corresponds to the inner diameter of the straight pipe section 2 of the pipe branch to be manufactured.
- a follow-up single tool (not illustrated) has one Mandrel 14 (without web) so that a complete bending is possible.
- the middle bent contact area 7 which has the tendency to open by spring force, is held together by a tensioning device and welded in the tensioned state along the line of contact without interruption, so that a gas-tight connection is created and no exhaust gas during operation of the System can escape through a gap.
- FIGS. 4 to 6 Different welding possibilities of the middle bent-over contact area 7 are shown in FIGS. 4 to 6.
- Fig. 5 schematically illustrates a side fillet weld on a short and a long board touching.
- FIG. 3 a further embodiment variant of a winding part 6 is shown in dashed lines with an intermediate region 11 between a straight pipe section 2 and a lateral pipe branch section 3, the intermediate region 11 being an overlapping area of the pipe wall lying flat against one another, the foremost contour 12 of which is closed and with a weld seam is provided in the manner of FIG. 4.
- a simple means to close a tube part end product or winding part 6 manufacture in particular a manifold pipe branch 1 of a motor vehicle exhaust system, starting from a flat sheet metal coil or blank blank, which is deep-drawn and trimmed in a progressive tool 4 to form a semi-finished pipe part, which corresponds to the developed shape of the pipe part end product corresponds.
- the pipe part semi-finished product is then pre-bent and wound in further process steps in the progressive tool.
- a finished bent winding part is finally welded gas-tight in its bent central contact area 7.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines Rohrteiles, insbesondere einer Krümmer-Rohrabzweigung einer Kraftfahrzeug-Abgasanlage sowie eine nach diesem Verfahren gefertigte Krümmer-Rohrabzweigung.The invention relates to a method for producing a pipe part, in particular a manifold pipe branch of a motor vehicle exhaust system, and a manifold pipe branch produced by this method.
Zur Herstellung einer Krümmer-Rohrabzweigung ist es bekannt, ein gerades oder gebogenes Rohr mit seitlichem Dorndurchbruch als Halbzeug in eine Kalibrierform einzubringen, deren Innenkontur der Außen-Sollkontur der zu fertigenden Krümmer-Rohrabzweigung entspricht. Das in die Kalibrierform eingebrachte Rohr wird an seinen Enden druckdicht verschlossen, wobei zumindest an einem druckdichten Rohrende eine Druckmittelquelle angeschlossen wird. Sodann wird unter hohem Druck ein vorzugsweise flüssiges Druckmittel, insbesondere eine Wasser-Öl-Emulsion, aus einer Druckquelle in das Rohrinnere gepreßt und das Rohr durch den Innendruck in die Werkzeugform kalibriert. Anschließend wird das verformte Rohr aus der Kalibrierform entnommen und gegebenenfalls endseitig mit planen oder schrägen Schnitten zugeschnitten. Das Herstellungsverfahren ist allgemein als sog. Innenhochdruck-Verfahren bekannt. Es hat den Nachteil einer vergleichsweise aufwendigen Fertigung und ist demzufolge vergleichsweise kostenintensiv. Auch können nur begrenzt unsymmetrische Rohrteile beispielsweise einer Abgasanlage eines Kraftfahrzeuges hergestellt werden, sofern auf die Einstückigkeit nicht verzichtet wird.To produce a manifold pipe branch, it is known to insert a straight or curved pipe with a lateral mandrel opening as a semifinished product into a calibration mold, the inner contour of which corresponds to the outside target contour of the manifold pipe branch to be produced. The tube introduced into the calibration mold is closed pressure-tight at its ends, a pressure medium source being connected at least to one pressure-tight tube end. A preferably liquid pressure medium, in particular a water-oil emulsion, is then pressed from a pressure source into the interior of the tube under high pressure and the tube is calibrated into the mold by the internal pressure. The deformed tube is then removed from the calibration mold and, if necessary, cut to the end with flat or oblique cuts. The manufacturing process is generally known as the so-called high pressure process. It has the disadvantage of being comparatively complex Manufacturing and is therefore comparatively expensive. It is also only possible to produce pipe parts which are asymmetrical to a limited extent, for example an exhaust system of a motor vehicle, provided that the one-piece design is not dispensed with.
Aufgabe der Erfindung ist die Schaffung eines Verfahrens der eingangs genannten Art, welches eine einfache und zuverlässige Fertigung eines Rohrteiles ermöglicht, insbesondere eine Krümmer-Rohrabzweigung.The object of the invention is to provide a method of the type mentioned at the outset which enables simple and reliable manufacture of a pipe part, in particular a manifold pipe branch.
Gelöst wird die der Erfindung zugrundeliegende Aufgabe durch ein Verfahren der im Patentanspruch 1 angebenen Art.The object on which the invention is based is achieved by a method of the type specified in
Vorteilhaft weitergebildet wird das Verfahren nach den Merkmalen der Ansprüche 2 und 3.The method is advantageously further developed according to the features of
Eine erfindungsgemäß hergestellte Krümmer-Rohrabzweigung kennzeichntet sich durch die Merkmale des Patentanspruchs 4, vorteilhaft weitergebildet durch die Merkmale nach den Ansprüchen 5 bis 9.An elbow pipe branch produced according to the invention is characterized by the features of
Wesen der Erfindung ist die Fertigung von Krümmer-Rohrabzweigungen und dergleichen nach einer besonderen Wickeltechnik unter Vermeidung des Innenhochdruck-Verfahrens.The essence of the invention is the production of manifold pipe branches and the like according to a special winding technique while avoiding the internal high-pressure process.
Insbesondere wird ein Blechcoil- oder Platine-Rohteil in einem Folgeverbundwerkzeug tiefgezogen und beschnitten zwecks Ausbildung eines Rohrteil-Halbzeuges, welches der abgewickelten Form des Rohrteil-Endzeuges entspricht. Dann wird das Rohrteil-Halbzeug in weiteren Verfahrensschritten im Folgeverbundwerkzeug vorgebogen und gewickelt und das schließlich fertiggebogene Wickelteil in seinem zusammengebogenen mittleren Berührungsbereich gasdicht verschweißt.In particular, a sheet metal coil or blank blank is deep-drawn in a progressive tool and trimmed to form a semi-finished tube part which corresponds to the developed shape of the finished tube part. Then, in further procedural steps, the semi-finished tube part is pre-bent and wound in the progressive tool and the finally bent winding part is welded gas-tight in its bent middle contact area.
Eventuell kann das fertiggebogene verschweißte Wickelteil einem Kalibriervorgang unterzogen werden, um die endgültige innere Paßform zu erhalten.The bent, welded winding part can possibly be subjected to a calibration process in order to obtain the final inner fit.
Der Schweißvorgang erfolgt durch Setzen insbesondere einer durchgehenden Schweißnaht bzw. Kehlnaht im zusammengebogenen Berührungsbereich eines Wickelteiles, insbesondere unter Zusammenpressung des Berührungsbereichs zwecks Überwindung der Rückstellkraft in Öffnungsrichtung der aufeinanderzu gebogenen Rohrteilabschnitte.The welding process is carried out by setting in particular a continuous weld or fillet in the bent contact area of a winding part, in particular by compressing the contact area in order to overcome the restoring force in the opening direction of the pipe sections bent towards one another.
Auf diese Weise entsteht vorzugsweise eine Krümmer-Rohrabzweigung einer Kraftfahrzeug-Abgasanlage in Form eines verschweißten einstückigen Wickelteils mit einem im wesentlichen geraden Rohrabschnitt und zumindest einem seitlichen Rohrabzweigungsabschnitt, wobei ein fertiggebogenes Wickelteil in seinem mittleren Berührungsbereich zwei Kurzborde aufweisen kann, welche stirnseitig mittels einer Schweißnaht verschweißt sind.In this way, a manifold pipe branch of a motor vehicle exhaust system is preferably produced in the form of a welded, one-piece winding part with an essentially straight pipe section and at least one lateral pipe branch section, wherein a completely bent winding part can have two short rims in its central contact area, which are welded on the end face by means of a weld seam are.
Anstelle zweier kurzer Borde im mittleren Berührungsbereich können auch ein kurzer Bord und ein längere Bord vorgesehen sein, welche seitlich mittels einer Kehlnaht miteinander verschweißt sind.Instead of two short shelves in the middle contact area, a short shelf and a longer shelf can also be provided, which are welded to one another laterally by means of a fillet weld.
Das fertiggebogene Wickelteil kann in seinem mittleren Berührungsbereich auch schachtelförmig ineinandergreifen und dort mit einer Kehlnaht verschweißt sein.The finished bent winding part can also engage in a box shape in its middle contact area and be welded there with a fillet weld.
Besonders zweckmäßig ist es, wenn die Krümmer-Rohrabzweigung im Zwischenbereich zwischen geradem Rohrabschnitt und seitlichem Rohrabschnitt flächig dicht aneinanderliegend ausgebildet ist und eine geschlossene Kontur aufweist, welche mit einer Schweißnaht versehen ist. Dies ermöglicht eine besonders einfach zu setzende Schweißnaht bei Schaffung einer gasdichten Verbindung in einem an sich schwierigen Schweißbereich.It is particularly expedient if the elbow pipe branch in the intermediate region between the straight pipe section and the lateral pipe section is designed to be flush with one another and has a closed contour which is provided with a weld seam. This enables a weld seam that is particularly easy to set when a weld is created gas-tight connection in a difficult welding area.
Durch die Erfindung können auch Krümmer-Rohrabzweigungen einfach gefertigt werden, welche doppelwandig ausgebildet sind.Through the invention, manifold pipe branches can be easily manufactured, which are double-walled.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Bezugnahme auf die beigefügte Zeichnung näher erläutert; es zeigen:
- Fig. 1
- ein zur Ausbildung einer Krümmer-Rohrabzweigung benötigtes in einem Folgeverbundwerkseug tiefgezogenes beschnittenes Rohrteil-Halbzeug in schematischer perspektivischer Darstellung,
- Fig. 2
- das in Fig. 1 veranschaulichte Rohrteil-Halbzeug im Folgeverbundwerkzeug nach einem Vorbiegen und Wickeln,
- Fig. 3
- das fertiggebogene verschweißte Rohrteil-Endzeug,
- Fig. 4
- zwei Kurzborde eines zusammengebogenen Berührungsbereichs des Rohrteil-Endzeugs mit stirnseitiger Schweißnaht schematisch im Querschnitt,
- Fig. 5
- der zusammengebogene Berührungsbereich des Rohrteil-Endzeugs ähnlich Fig. 4 in anderer Ausführungsvariante,
- Fig. 6
- eine dritte Ausführungsvariante des zusammengebogenen Berührungsbereichs ähnlich den Fig. 4 und 5, und
- Fig. 7
- eine vierte Ausführungsvariante eines doppelwandigen Rohrteil-Endzeugs ähnlich Fig. 4.
- Fig. 1
- a semi-finished tube part, which is deep-drawn and cut to form a manifold pipe branch in a follow-on composite tool, in a schematic perspective illustration,
- Fig. 2
- 1 in the progressive tool after pre-bending and winding,
- Fig. 3
- the finished bent welded pipe part end product,
- Fig. 4
- two short shelves of a bent contact area of the tubular part end product with frontal weld seam schematically in cross section,
- Fig. 5
- the bent contact area of the tubular part end product similar to FIG. 4 in another embodiment variant,
- Fig. 6
- a third embodiment of the bent contact area similar to FIGS. 4 and 5, and
- Fig. 7
- a fourth embodiment of a double-walled tubular part end product similar to FIG. 4.
Gemäß Zeichnung ist eine Krümmer-Rohrabzweigung 1 einer Kraftfahrzeug-Abgasanlage in unterschiedlichen Herstellungsstufen gemäß den Fig. 1 bis 3 schematisch dargestellt, wobei die Fig. 4 bis 7 verschiedene Einzelheiten zeigen.According to the drawing, a
Die Krümmer-Rohrabzweigung ist nicht nach dem Innenhochdruck-Verfahren, sondern nach einem besonderen Wickelverfahren gefertigt.The manifold pipe branch is not manufactured according to the internal high-pressure process, but according to a special winding process.
Es findet als Ausgangsmaterial eine Blechplatte / Platine oder ein Coil Verwendung, welche(r) in einem komplexen nur schematisch gezeigten Folgeverbundwerkzeug 4 formbehandelt, gestanzt und/oder beschnitten wird.A sheet metal plate / circuit board or a coil is used as the starting material, which is shaped, stamped and / or trimmed in a complex
Das Folgeverbundwerkzeug 4 umfaßt eine Grundplatte und eine Kopfplatte und verschiedene auswechselbare Einzelwerkzeuge.The
Gemäß Fig. 1 ist bereits ein Rohrteil-Halbzeug 5 in Form eines beschnittenen Tiefziehteils aus Blech dargestellt, welches aus der Platine im Folgeverbundwerkzeug entstanden ist. Das Halbzeug entspricht der abgewickelten Form des Rohrteil-Endzeuges, nämlich der Krümmer-Rohrabzweigung 1.1, a
Das Rohrteil-Halbzeug 5 gemäß Fig. 1 wird im Folgeverbundwerkzeug 4 gemäß Fig. 2 weiterbehandelt, nämlich um ein Einzelwerkzeug des Folgeverbundwerkzeuges um dessen Achse 13 eines Dorns 14 vorgebogen und gewickelt. Der Dorn 14 besitzt einen Außendurchmesser, der dem Innendurchmesser des geradlinigen Rohrabschnittes 2 der zu fertigenden Rohrabzweigung entspricht. Infolge des Steges 15 des Einzelwerkzeugs kann der seitliche, zu fertigende Rohrabzweigungsabschnitt 3 nicht vollständig zusammengebogen werden.1 is further processed in the
Ein (nicht veranschaulichtes) Folgeeinzelwerkzeug weist einen Dorn 14 (ohne Steg) auf, so daß ein komplettes Zusammenbiegen möglich ist. In einem separaten Schweißwerkzeug wird der mittlere zusammengebogene Berührungsbereich 7, welcher die Tendenz hat, sich durch Federkraft zu öffnen, wird durch eine Spanneinrichtung zusammengehalten und im verspannten Zustand längs der Berührungslinie ohne Unterbrechung verschweißt, so daß eine gasdichte Verbindung entsteht und kein Abgas im Betrieb der Anlage durch einen Spalt entweichen kann.A follow-up single tool (not illustrated) has one Mandrel 14 (without web) so that a complete bending is possible. In a separate welding tool, the middle
Verschiedene Verschweißmöglichkeiten des mittleren zusammengebogenen Berührungsbereichs 7 sind in den Fig. 4 bis 6 dargestellt.Different welding possibilities of the middle bent-over
Fig. 4 sieht eine Stirnschweißnaht im Bereich kurzer sich berührender Borde 9 vor.4 provides a front weld seam in the area of short, touching
Fig. 5 veranschaulicht schematisch eine seitliche Kehlnaht bei einem kurzen und einem langen Bord, die sich berühren.Fig. 5 schematically illustrates a side fillet weld on a short and a long board touching.
Fig. 6 zeigt aufeinanderzu gebogene Bereiche eines Wickelteils 6, die schachtelartig ineinandergreifen und miteinander verschweißt sind.6 shows regions of a winding part 6 which are bent towards one another and which engage in a box-like manner and are welded to one another.
In Fig. 3 ist in gestrichelter Linie eine weitere Ausführungsvariante eines Wickelteils 6 mit einem Zwischenbereich 11 zwischen geradlinigem Rohrabschnitt 2 und seitlichem Rohrabzweigungsabschnitt 3 dargestellt, wobei der Zwischenbereich 11 ein sich überdeckender, flächig aneinanderliegender Bereich der Rohrwand ist, dessen vorderste Kontur 12 geschlossen und mit einer Schweißnaht nach Art der Fig. 4 versehen ist.In Fig. 3, a further embodiment variant of a winding part 6 is shown in dashed lines with an
Es wird mithin durch die Erfindung ermöglicht, ein Rohrteil-Endzeug bzw. Wickelteil 6 mit Hilfe einfacher Mittel zu fertigen, insbesondere eine Krümmer-Rohrabzweigung 1 einer Kraftfahrzeug-Abgasanlage, und zwar ausgehend von einem planen Blechcoil- oder Platine-Rohteil, welches in einem Folgeverbundwerkzeug 4 tiefgezogen und beschnitten wird zwecks Ausbildung eines Rohrteil-Halbzeuges, welches der abgewickelten Form des Rohrteil-Endzeuges entspricht. Das Rohrteil-Halbzeug wird in weiteren Verfahrensschritten im Folgeverbundwerkzeug anschließend vorgebogen und gewickelt. Ein fertiggebogenes Wickelteil wird schließlich in seinem zusammengebogenen mittleren Berührungsbereich 7 gasdicht verschweißt.It is thus made possible by the invention to use a simple means to close a tube part end product or winding part 6 manufacture, in particular a
Es sei noch angemerkt, daß in den Unteransprüchen enthaltene selbständig schutzfähige Merkmale trotz der vorgenommenen formalen Rückbeziehung auf den Hauptanspruch entsprechenden eigenständigen Schutz haben sollen. Im übrigen fallen sämtliche in den gesamten Anmeldungsunterlagen enthaltenen erfinderischen Merkmale in den Schutzumfang der Erfindung.It should also be noted that, despite the formal reference back to the main claim, the independently protectable features contained in the subclaims should have appropriate independent protection. For the rest, all inventive features contained in the entire application documents fall within the scope of the invention.
Claims (9)
dadurch gekennzeichnet,
daß ein Blechcoil- oder Platine-Rohteil in einem Folgeverbundwerkzeug (4)
zwecks Ausbildung eines Rohrteil-Halbzeuges (5), welches der abgewickelten Form des Rohrteil-Endzeuges entspricht,
daß das Rohrteil-Halbzeug (5) in weiteren Verfahrensschritten im Folgeverbundwerkzeug (4)
characterized,
that a sheet metal coil or blank blank in a progressive tool (4)
in order to form a semi-finished tube part (5) which corresponds to the developed shape of the finished tube part,
that the tubular part semi-finished product (5) in further process steps in the progressive tool (4)
dadurch gekennzeichnet,
daß das fertiggebogene verschweißte Wickelteil (6) zumindest einem Kalibriervorgang unterzogen wird.Method according to claim 1,
characterized,
that the finished bent welded winding part (6) is subjected to at least one calibration process.
dadurch gekennzeichnet,
daß das fertiggebogene Wickelteil (6) mit einer Schweiß- oder Kehlnaht (8) versehen wird.The method of claim 1 or 2,
characterized,
that the finished bent winding part (6) is provided with a weld or fillet (8).
dadurch gekennzeichnet,
daß das fertiggebogene verschweißte einstückige Wickelteil (6) einen im wesentlichen geraden Rohrabschnitt (2) und zumindest einen seitlichen Rohrabzweigungsabschnitt (3) aufweist.Manifold pipe branch (1) of a motor vehicle exhaust system, manufactured according to one of claims 1 to 3,
characterized,
that the finished bent welded one-piece winding part (6) has a substantially straight pipe section (2) and at least one lateral pipe branch section (3).
dadurch gekennzeichnet,
daß das fertiggebogene Wickelteil (6) in seinem mittleren Berührungsbereich (7) zwei Kurzborde (9) aufweist, welche stirnseitig mittels einer Schweißnaht (8) verschweißt sind (Fig. 4).Manifold pipe branch (1) according to claim 4,
characterized,
that the finished winding part (6) has in its central contact area (7) two short rims (9) which are welded on the end face by means of a weld seam (8) (Fig. 4).
dadurch gekennzeichnet,
daß das fertiggebogene Wickelteil (6) in seinem mittleren Berührungsbereich (7) einen Kurzbord (9) und einen Langbord (10) aufweist, welche seitlich mittels einer Kehlnaht (8) miteinander verschweißt sind ( Fig. 5).Manifold pipe branch (1) according to claim 4,
characterized,
that the finished bent winding part (6) in its central contact area (7) has a short board (9) and a long board (10), which are welded to each other laterally by means of a fillet weld (8) (Fig. 5).
dadurch gekennzeichnet,
daß das fertiggebogene Wickelteil (6) in seinem mittleren Berührungsbereich (7) schachtelförmig ineinandergreift und mittels Kehlnaht verschweißt ist (Fig. 6).Manifold pipe branch (1) according to claim 4,
characterized,
that the finished bent winding part (6) engages in a box-shaped manner in its central contact area (7) and is welded by means of fillet weld (Fig. 6).
dadurch gekennzeichnet,
daß der Zwischenbereich (11) zwischen geradem Rohrabschnitt (2) und seitlichem Rohrabzweigungsabschnitt (3) flächig dicht aneinanderliegend ausgebildet ist und eine geschlossene Kontur (12) aufweist, welche mit einer Schweißnaht versehen ist (Fig. 3).Manifold pipe branch (1) according to one of claims 4 to 7,
characterized,
that the intermediate area (11) between the straight pipe section (2) and the lateral pipe branch section (3) is formed close to one another and has a closed contour (12) which with a Weld seam is provided (Fig. 3).
dadurch gekennzeichnet,
daß das Wickelteil (6) doppelwandig ausgebildet ist (Fig. 7).Manifold pipe branch (1) according to one of claims 4 to 8,
characterized,
that the winding part (6) is double-walled (Fig. 7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1995148224 DE19548224A1 (en) | 1995-12-22 | 1995-12-22 | Method for producing a pipe part, in particular a manifold-pipe branch of a motor vehicle exhaust system, and a manifold-pipe branch manufactured according to this |
| DE19548224 | 1995-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0780173A2 true EP0780173A2 (en) | 1997-06-25 |
| EP0780173A3 EP0780173A3 (en) | 1998-10-21 |
Family
ID=7781071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96119402A Withdrawn EP0780173A3 (en) | 1995-12-22 | 1996-12-04 | Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0780173A3 (en) |
| DE (1) | DE19548224A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2811741A1 (en) * | 2000-07-17 | 2002-01-18 | Imphy Ugine Precision | METHOD FOR MANUFACTURING A STRUCTURAL ELEMENT HAVING A METALLIC WALL OF TUBULAR GENERAL FORM AND STRUCTURAL ELEMENT |
| WO2003031091A1 (en) * | 2001-10-06 | 2003-04-17 | Daimlerchrysler Ag | Method for producing a branch pipe |
| EP1242200A4 (en) * | 1999-04-13 | 2004-03-31 | Joseph Mckenna | Method of forming t-connectors |
| CN103920744A (en) * | 2014-05-04 | 2014-07-16 | 唐山诚达建设集团有限公司 | Integrated processing device with branch pipe fitting |
| CN106077132A (en) * | 2016-07-07 | 2016-11-09 | 燕山大学 | The manufacturing process of the double weld seam threeway of a kind of big template system and forming device |
| WO2019144603A1 (en) * | 2018-01-26 | 2019-08-01 | 天纳克（苏州）排放系统有限公司 | Exhaust gas inlet tube and box-type exhaust gas aftertreatment device |
| CN115673694A (en) * | 2023-01-03 | 2023-02-03 | 内江东工设备制造股份有限公司 | A method of manufacturing a super-large steel bifurcation pipe |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10358502B3 (en) * | 2003-12-13 | 2005-04-07 | Daimlerchrysler Ag | Production of a hollow profile used as a branched part for pipes comprises stamping a secondary molding element to connect to a further component in a pre-curved region before winding |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE373874A (en) * | ||||
| US1830262A (en) * | 1928-09-21 | 1931-11-03 | Rockwood Sprinkler Co Massachusetts | Method of making pipe fittings |
| FR761992A (en) * | 1933-09-26 | 1934-03-31 | Cie Nat Radiateurs | Pipe or tee fitting and its manufacturing process |
| US2713195A (en) * | 1951-03-15 | 1955-07-19 | Solar Aircraft Co | Method of making an engine manifold |
| FR1327091A (en) * | 1962-03-19 | 1963-05-17 | Neyrpic Ateliers Neyret Beylie | Improvements in manufacturing processes for piping parts |
| JPS53116267A (en) * | 1977-03-23 | 1978-10-11 | Mitsubishi Plastics Ind Ltd | Manufacture of branched pipe joint |
| JPH0543227Y2 (en) * | 1987-12-21 | 1993-10-29 | ||
| DE4113855A1 (en) * | 1991-04-27 | 1992-08-20 | Bayerische Motoren Werke Ag | Rolled body silencer for vehicle IC engine - makes use of truncated cone shape with flanged ends |
-
1995
- 1995-12-22 DE DE1995148224 patent/DE19548224A1/en not_active Withdrawn
-
1996
- 1996-12-04 EP EP96119402A patent/EP0780173A3/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1242200A4 (en) * | 1999-04-13 | 2004-03-31 | Joseph Mckenna | Method of forming t-connectors |
| FR2811741A1 (en) * | 2000-07-17 | 2002-01-18 | Imphy Ugine Precision | METHOD FOR MANUFACTURING A STRUCTURAL ELEMENT HAVING A METALLIC WALL OF TUBULAR GENERAL FORM AND STRUCTURAL ELEMENT |
| WO2002005979A1 (en) * | 2000-07-17 | 2002-01-24 | Imphy Ugine Precision | Method for making a structural element having a generally tubular metal wall and structural element |
| US6814275B2 (en) | 2000-07-17 | 2004-11-09 | Imphy Ugine Precision | Method for making a structural element having a generally tubular metal wall and structural element |
| US7381476B2 (en) | 2000-07-17 | 2008-06-03 | Imphy Ugine Precision | Structural element having a metal wall of generally tubular shape |
| WO2003031091A1 (en) * | 2001-10-06 | 2003-04-17 | Daimlerchrysler Ag | Method for producing a branch pipe |
| CN103920744A (en) * | 2014-05-04 | 2014-07-16 | 唐山诚达建设集团有限公司 | Integrated processing device with branch pipe fitting |
| CN103920744B (en) * | 2014-05-04 | 2016-01-27 | 唐山诚达建设集团有限公司 | A kind of band arm pipe fitting one process equipment |
| CN106077132A (en) * | 2016-07-07 | 2016-11-09 | 燕山大学 | The manufacturing process of the double weld seam threeway of a kind of big template system and forming device |
| WO2019144603A1 (en) * | 2018-01-26 | 2019-08-01 | 天纳克（苏州）排放系统有限公司 | Exhaust gas inlet tube and box-type exhaust gas aftertreatment device |
| CN115673694A (en) * | 2023-01-03 | 2023-02-03 | 内江东工设备制造股份有限公司 | A method of manufacturing a super-large steel bifurcation pipe |
| CN115673694B (en) * | 2023-01-03 | 2023-03-03 | 内江东工设备制造股份有限公司 | Manufacturing method of oversized steel bifurcated pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19548224A1 (en) | 1997-06-26 |
| EP0780173A3 (en) | 1998-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19604357B4 (en) | Process for the production of pipes with sections of different wall thickness | |
| EP2012947B1 (en) | Method and device for producing low-springback half shells | |
| DE60101789T2 (en) | METHOD FOR PRODUCING A TUBULAR COMPONENT | |
| EP0942794B1 (en) | Method for producing a molded part | |
| EP1820577A1 (en) | Apparatus for manufacturing profiles with axially variable cross-section and profiles manufactured by this apparatus | |
| WO2005002753A1 (en) | Method for producing from a metal sheet a hollow profile which is longitudinally slotted and provided with several longitudinal segments having different cross sections | |
| DE4333500C2 (en) | Process for the production of a sheet with different wall thicknesses and a pair of extruded profiles | |
| DE102009031981A1 (en) | Method for producing vehicle component in form of torsion profile from blank, involves providing blank with longitudinally aligned U-shaped trough at distance from its front end in production stage | |
| EP1089835A1 (en) | Method and device for producing straight bead welded pipes from flat sheet metal blanks | |
| EP1479458B1 (en) | Method for manufacturing tubes and profiles | |
| EP0780173A2 (en) | Method of manufacturing a pipe section, particularly a branch pipe manifold and branch pipe manifold produced thereby | |
| EP1954420B1 (en) | Method and device for the coreless forming of hollow profiles | |
| WO2005051562A1 (en) | Production of ihu components with a flange | |
| EP1000677B1 (en) | Method for forming a workpiece by application of a high internal pressure | |
| EP1382518B1 (en) | Method for manufacturing a sheet metal component for a vehicle body | |
| EP1138408A2 (en) | Method for making high volume hollow bodies | |
| DE19727599B4 (en) | Method for producing metal wheels | |
| DE10325036A1 (en) | Method and device for producing bending profiles | |
| DE10218986A1 (en) | Manufacturing system for fuel tank for road vehicle involves making flanges on edges of sheet metal parts and pressing them together followed by welding process | |
| EP0938389B1 (en) | Method for wrapping a metal strip around a plastic tube | |
| DE19848290C2 (en) | Device and method for producing shell-shaped components made of metal and shell-shaped component made of metal | |
| DE10358845B4 (en) | Method for producing short bent pipe sections | |
| DE19523763C2 (en) | Method of manufacturing a tubular exhaust manifold from sheet metal | |
| DE102011051801B4 (en) | Method and device for producing core clips and core clip | |
| DE102007060088A1 (en) | Internal high pressure-transformable hollow section producing method for e.g. door frame, of vehicle, involves joining flange areas with each other such that internal high pressure-transformable hollow section is produced |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB IT |
|
| 17P | Request for examination filed |
Effective date: 19990323 |
|
| 17Q | First examination report despatched |
Effective date: 19990608 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: J. EBERSPAECHER GMBH & CO. KG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20040701 |