EP0919704B1 - Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres - Google Patents
Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres Download PDFInfo
- Publication number
- EP0919704B1 EP0919704B1 EP98120557A EP98120557A EP0919704B1 EP 0919704 B1 EP0919704 B1 EP 0919704B1 EP 98120557 A EP98120557 A EP 98120557A EP 98120557 A EP98120557 A EP 98120557A EP 0919704 B1 EP0919704 B1 EP 0919704B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- double
- branch
- high pressure
- branch connection
- 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
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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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/037—Forming branched tubes
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/051—Deforming double-walled bodies
-
- 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
-
- 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1883—Construction facilitating manufacture, assembly, or disassembly manufactured by hydroforming
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49398—Muffler, manifold or exhaust pipe making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49805—Shaping by direct application of fluent pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
- Y10T29/4994—Radially expanding internal tube
Definitions
- the invention relates to a method for producing a an air gap insulated exhaust pipe provided with a branch pipe according to the preamble of claim 1.
- a generic method is known from DE 195 11 514 C1. This includes the manufacture of an air-gap insulated exhaust pipe with a branch pipe in connection with a Assembly of several exhaust pipes to form an exhaust manifold, the one consisting of two interconnected half shells existing outer jacket of the branched exhaust pipe common Part of all exhaust pipes of the exhaust manifold is. So the inner pipes of the exhaust pipes are first fitted with a sliding seat put on top of each other and in a complex way with special Spacer rings, which later in the operation after assembly evaporate from the exhaust system. The plug-in will then placed in a lower shell of the outer casing and in more elaborate Positioned way.
- the transposition the complex positioning of the inner tubes in the lower shell of the outer jacket by means of the spacer rings and the manufacturing-related tolerances in the inner tube formation as well as the associated from assembly to assembly different relative positions of the inner ear in each and outside of the outer shell to the outer shell can be without further on a single branched inner tube with one out Execute two outer shells.
- the inner tube with the branch pipe is within the stated manufacturing tolerances practically never with the desired defined revolving Air gap inside the outer jacket.
- the outer jacket is just because of the branched exhaust pipe spatially very expansive, which in the manufacture the half-shells did not branch out by deep drawing can be and thus for a contoured training of a Outer jacket with regard to the design of the inner tube is not is suitable. However, this requires considerable space and increases the weight of the branched exhaust pipe. In addition, this is the formation of a defined uniformly uniform Air gap cannot be reached in the branched exhaust pipe.
- WO 95/31635 A1 describes the production of an exhaust manifold known, which is bent from a tube end, the curved ends serve as inlets that are at the outlets of the Cylinder head are attached.
- the straight pipe blank becomes by means of fluidic internal high pressure in a corresponding Tool formed a branch that the outlet of the exhaust manifold represents and is connected to the further exhaust line.
- tube material ends up in the forming area of the branch additionally pushed axially.
- US 5,363,544 shows the production of a curved one Exhaust pipe from a double pipe, being in a two-stage Process by means of internal high pressure the outer pipe of the double pipe is expanded to form an air gap.
- the invention has for its object a generic To further develop methods in a simple manner an air gap-insulated exhaust pipe with a branch connector exactly can be produced reproducibly, which is easy to install is without affecting the dimensional accuracy with regard to Air gap width and the relative position of the inner tube to the outer jacket.
- the invention is a simple manufacture of the branched Exhaust pipe made of two nested welded or drawn and, if necessary, pre-bent double tubes cut to length from the rod possible.
- a complex deep drawing of half-shells, that form the outer jacket, as well as the very complicated welding of the two half shells, especially in the transition of the Flare seam to the circular seam in the area of the branch connector, in which Transition occurs due to edge radii a gusset to ensure the durability of the weld can only be welded with filler material.
- the branched according to the invention is also Exhaust pipe more durable than the conventional solutions because the exhaust pipe only at the connection points to others Components of the exhaust system during the welding process receives which in a simple manner in the form of revolving mechanically highly resilient fillet welds can be formed. The failure-prone flared seams in the well-known exhaust pipe omitted.
- Fig. 1 are two straight tubes of equal length shown with an approximately circular cross-section, the one tube, the inner tube 1, in the other tube, the outer tube 2, with complete coverage of the inner tube 1 with little Game in the direction of the arrow.
- the inner tube 1 has at both ends 3.4 over the circumference evenly each distributes a ring of holes 5 with through holes 6.
- the two tubes 1 and 2 can also be bent and one of the Circular cross-section have a different cross-section, however they must be pluggable.
- the sealing head protrudes 13 with a conically tapering in the direction of insertion Section 14 so far into the double tube that the Perforated ring 5 of the inner tube 1 is covered.
- the conical section 14 of the sealing head 13 carries on branch facing Side of the rim 5 a radially expandable sealing element 15, for example an elastic O-ring used for sealing with high force fluid high pressure sealing on the inside 16 of the inner tube 1 is pressed.
- a radially expandable sealing element 15 for example an elastic O-ring used for sealing with high force fluid high pressure sealing on the inside 16 of the inner tube 1 is pressed.
- On branch facing away Side of the rim 5 is the circumference of the conical section 14 dimensioned larger than the inner circumference of the inner tube 1, so that the double pipe there when inserting the sealing head 13 to form a radially acting metallic seal is squeezed radially for the double tube.
- the first hydroforming tool 8 After closing the first hydroforming tool 8 is a pressure fluid over one in the axial punch and the associated Sealing head 13 extending pressure fluid channel 19 in the Interior 20 of the inner tube 1 initiated and under high pressure set.
- the double tube expands, which double-walled tube material in the pocket 12 of the counter stamp 10 is pushed into it.
- the first counter-punch 10 by means of a controllable hydraulic cylinder checked out in branch 9, whereby by means of the internal high pressure from the double pipe a double wall Branch connector 21 is blown out, which end is supported by the counter-punch 10 and laterally on the Wall of the branch 9 hugs the shape.
- the process reliability during the first forming process becomes significant promoted by sufficient supply of pipe material.
- By Introduction of an axial force on the pipe ends of the double pipe by means of the axial ram over the on the front side 18 of the Double pipe ring collar 17 of the sealing heads 13 can Pipe material of the double pipe to branch 9, i.e. the location of the greatest degree of deformation are pushed.
- the amount of pushing force to be set can be adjusted as required the blow-out length changes reliably within certain limits be, whereby a high adaptability of the exhaust pipe to the each different available space conditions achieved can be. It is done safely by pushing no noticeable thinning of the wall thickness, which makes good Installation conditions when connecting to another component is guaranteed.
- the pressure fluid is released and out led out of the branched double pipe, after which the first forming tool 8 is opened and the branched double tube is removed becomes.
- the engraving 24 is such trained that the double tube at its end portions of the Engraving 24 held in a game fit and between the two Ends all around and consistently of one cylindrical expansion coaxial to the double tube 26 surrounded is.
- the branch connector 21 is located in a branch 27 of the engraving 24, which corresponds to the expansion space 26 by approximately the same Dimension surrounds the branch connector 21.
- Branch 27 is a second counter-stamp 28 arranged, in its end face 29 corresponding to the counter punch 10 of the first forming tool 8 trained pocket 34 the bottle neck-like Bulge 31 of the branch connector 21 added with little play is.
- the now following second forming process according to FIG. 4 is the forming tool 25 closed and the double pipe on again both ends through sealing heads 30 of axial punches forming a metallic seal and crushing the Sealed pipe ends, but in such a way that the ring of holes 5 one Internal high pressure remains freely accessible.
- Pressurized fluid channels 32 are now in the interior 20 of the inner tube 1 a pressure fluid is introduced and placed under high pressure.
- the outer tube 2 Due to the free perforated ring 5, the outer tube 2 is direct pressurized, causing it to expand into the expansion space 26 is expanded into and engages in the engraving 24 of the forming tool 25 and the wall of the branch 27 in line with the contour invests.
- the counter-punch 28 is relentlessly supported on the outside and thus remains unchanged during the expansion its support position without evading radially outwards, whereby the not bulged area of the end face 22 of the branch connector 21 on the facing end face 29 of the counter-stamp 28 creates.
- the second deformation of the exhaust pipe results in the lifting the outer tube 2 from the inner tube 1 this one evenly between the pinched ends all around surrounding gap, the So-called air insulation gap 33, which is in its Width is dimensioned completely constant, being in its course the contour of the inner tube 1 follows exactly.
- the inner tube 1 remains between its interior due to the pressure equalization 20 and the gap 33 undeformed during the second forming.
- the pressure fluid is released from the almost finished air gap insulated exhaust pipe led out, after which the second forming tool 25 is opened and the exhaust pipe is removed.
- the cap region 23 of the branch connector 21 to form a through opening 35, the interior 20 of the inner tube 1 with the external environment of the air-gap insulated exhaust pipe connects, for example cut off by sawing or laser cutting.
- the bottle neck-like design of the end face 22 then remains a short cylindrical portion 36 in which a clamping of the tube walls is still present, so that too after trimming, no change in the relative position of the inner tube 1 to the outer tube 2 can be done.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Exhaust Silencers (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
Claims (6)
- Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres im Abgasstrang eines Fahrzeuges, wobei ein abgasführendes mit einem Abzweig ausgebildetes Innenrohr mit einem Außenmantel unter Bildung eines Luftisolierspaltes ringsum beabstandet umgeben wird, das gemeinsam mit dem Außenmantel das Abgasrohr samt Abzweigstutzen bildet,
dadurch gekennzeichnet, daß zur Ausbildung des Abgasrohres zwei bezüglich ihrer Form gleichgestaltete Rohre (1,2) mit geringem Spiel unter Bildung eines Doppelrohres ineinandergesteckt werden, daß das so gebildete Doppelrohr in ein erstes Innenhochdruck-Umformwerkzeug (8) eingebracht wird, beiderends fluidhochdruckdicht abgedichtet und nach Schließen des ersten Umformwerkzeuges (8) und Einleiten eines Druckfluides in den Innenraum (20) des Innenrohres (1) des Doppelrohres mit Innenhochdruck über das eingeleitete Druckfluid derart beaufschlagt wird, daß sich das Doppelrohr entsprechend der Konturierung der Gravur (7) des ersten Umformwerkzeuges (8) aufweitet, wobei aufgrund eines Abzweiges (9) der Gravur (7) mittels des Innenhochdruckes aus dem Doppelrohr ein doppelwandiger Abzweigstutzen (21) ausgeblasen wird und wobei aufgrund einer im Gegenstempel (10) ausgebildeten mittigen Tasche (12) die Stirnseite (22) des doppelwandigen Abzweigstutzens (21) flaschenhalsartig durch den Innenhochdruck ausgebeult wird, daß nach dem Erzeugen des Abzweigstutzens (21) das Druckfluid entspannt und aus dem Innenraum (20) des inneren Rohres (1) herausgeleitet wird, wonach das erste Umformwerkzeug (8) geöffnet und das umgeformte Doppelrohr entnommen und in ein zweites Innenhochdruck-Umformwerkzeug (25) eingebracht wird, wobei das Doppelrohr an den Endbereichen von der Gravur (24) des zweiten Umformwerkzeuges (25) in einer Spielpassung gehalten und zwischen den beiden Enden einschließlich des Abzweigstutzens (21) umlaufend und durchgängig durch entsprechende Ausbildung der Gravur (24) von einem Aufweitraum (26) umgeben wird, daß nach dem Schließen des Umformwerkzeuges (25) und Abdichtung des mit einem Abzweigstutzen (21) ausgeformten Doppelrohres unter Hochdruck ein Druckfluid einerseits zwischen die beiden das Doppelrohr bildenden Rohre (1,2) einerseits und gleichzeitig in den Innenraum (20) des Innenrohres (1) andererseits eingeleitet wird, wobei das Außenrohr (2) innenhochdruckbeaufschlagt bis zur konturgerechten Anlage an der Gravur (24) des zweiten Umformwerkzeuges (25) in den Aufweitraum (26) hinein unter Bildung eines Luftisolationsspaltes (33) zwischen dem Außenrohr (2) und dem Innenrohr (1) aufgeweitet wird, daß beim Aufweiten die vom Doppelrohr wegweisende Stirnseite (22) des Abzweigstutzens (21) mittels eines in der Abzweig (27) der Gravur (24) angeordneten zweiten Gegenstempels (28) nach außen unnachgiebig abgestützt wird, und daß nach dem Aufweiten des Doppelrohres, Entspannen und Herausleiten des Druckfluides aus dem infolge der beiden Umformungen mit einem Abzweigstutzen (21) und einer Luftspaltisolierung versehenen Doppelrohr, sowie Öffnen des zweiten Umformwerkzeuges (25) und Entnahme des fertigumgeformten Doppelrohres, bei dem der Außenmantel vom Außenrohr (2) gebildet wird, der die Stirnseite (22) beinhaltende Kappenbereich (23) des Abzweigstutzens (21) unter Bildung einer Durchgangsöffnung (35) zwischen dem Innenraum (20) des Innenrohres (1) und der äußeren Umgebung des luftspaltisolierten Abgasrohres abgeschnitten wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß nach einer in einer Verbindung des Abgasrohres am Ende des Abzweigstutzens (21) mit einem weiteren Bauteil des Abgasstranges begründeten radialen Festlegung von Innenrohr (1) und Außenrohr (2) die freiliegenden Endbereiche des Abgasrohres mit den klemmend aneinandergepreßten Wandungen des Innenrohres (1) und des Außenrohres (2) abgeschnitten werden. - Verfahren nach Anspruch 2,
dadurch gekennzeichnet, daß zum Abschneiden der Endbereiche des Abgasrohres am Außenrohr (2) vollumfänglich Umfangsstreifen (37) mittels Strahlschneiden herausgeschnitten werden, und daß danach das Innenrohr (1) in dem nach Enfernen der Streifen (37) freigelegten Bereich durch Sägen oder Strahlschneiden durchtrennt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß zur Bildung des Luftisolierspaltes (33) das Druckfluid vom Innenraum (20) des Innenrohres (1) aus durch zumindest ein in der Wandung des Innenrohres (1) ausgebildetes Durchgangsloch (6) hindurch zwischen die das Doppelrohr bildenden Rohre (1,2) geleitet wird, wobei das jeweilige Loch (6) bei der Aufweitung des Doppelrohres im ersten Innenhochdruck-Umformwerkzeug (8) abgedichtet wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß beim ersten Umformvorgang der doppelwandige Abzweigstutzen (21) stirnseitig mittels eines in dem Abzweig (9) der Gravur (7) des ersten Innenhochdruck-Umformwerkzeuges (8) verschiebbar geführten, nach außen ausweichenden ersten Gegenstempels (10) abgestützt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß beim ersten Umformvorgang zum Ausblasen des Abzweigstutzens (21) Rohrmaterial mittels zumindest eines ein Ende des Doppelrohres beaufschlagenden Axialstempels zur Ausformstelle des Abzweigstutzens (21) nachgeschoben wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752772 | 1997-11-28 | ||
DE19752772A DE19752772C2 (de) | 1997-11-28 | 1997-11-28 | Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0919704A1 EP0919704A1 (de) | 1999-06-02 |
EP0919704B1 true EP0919704B1 (de) | 2002-04-03 |
Family
ID=7850095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98120557A Expired - Lifetime EP0919704B1 (de) | 1997-11-28 | 1998-10-30 | Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres |
Country Status (3)
Country | Link |
---|---|
US (3) | US6349468B1 (de) |
EP (1) | EP0919704B1 (de) |
DE (2) | DE19752772C2 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
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DE19752772C2 (de) * | 1997-11-28 | 1999-09-02 | Daimler Chrysler Ag | Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres |
DE10013428C1 (de) * | 2000-03-17 | 2001-01-18 | Daimler Chrysler Ag | Verfahren zur Herstellung von doppelwandigen Hohlprofilen mittels Innenhochdruckumformen |
DE10121787C1 (de) * | 2001-05-04 | 2002-07-11 | Daimler Chrysler Ag | Verfahren und Vorrichtung zur Herstellung von Nebenformelementen |
US7323145B2 (en) * | 2002-03-26 | 2008-01-29 | Evolution Industries, Inc. | Automotive exhaust component and method of manufacture |
US7169365B2 (en) * | 2002-03-26 | 2007-01-30 | Evolution Industries, Inc. | Automotive exhaust component and method of manufacture |
US6696666B2 (en) * | 2002-07-03 | 2004-02-24 | Scimed Life Systems, Inc. | Tubular cutting process and system |
US7685714B2 (en) | 2003-03-18 | 2010-03-30 | Tursky John M | Automotive exhaust component and process of manufacture |
DE10347923B4 (de) * | 2003-10-15 | 2005-07-28 | Daimlerchrysler Ag | Vorrichtung zum Umformen eines umfänglich geschlossenen Hohlprofils mittels fluidischen Innenhochdrucks |
DE10356535B3 (de) * | 2003-12-04 | 2004-08-26 | Daimlerchrysler Ag | Vorrichtung zum Herstellen eines Hohlprofils |
DE102005024831A1 (de) * | 2005-05-27 | 2006-11-30 | J. Eberspächer GmbH & Co. KG | Schalldämpfer für eine Abgasanlage und Herstellungsverfahren |
US7305763B2 (en) * | 2005-07-26 | 2007-12-11 | Board Of Trustees Of Michigan State University | Hydroformed port liner |
DE102006021674B4 (de) * | 2006-05-10 | 2014-05-15 | Tenneco Gmbh | Verfahren zum Herstellen von Abgaskrümmern |
DE102007062659A1 (de) * | 2007-12-24 | 2009-06-25 | J. Eberspächer GmbH & Co. KG | Abgassammler und zugehöriges Herstellungsverfahren |
US7827838B2 (en) * | 2008-05-05 | 2010-11-09 | Ford Global Technologies, Llc | Pulsed electro-hydraulic calibration of stamped panels |
JP2011052605A (ja) * | 2009-09-02 | 2011-03-17 | Yamaha Motor Co Ltd | 排気装置と、これを備えた鞍乗型車両と、排気管の製造、及び、取り付け方法 |
USD665320S1 (en) * | 2011-03-14 | 2012-08-14 | Donna Medved | Tail pipe tip extenders |
US20160101490A1 (en) * | 2014-10-08 | 2016-04-14 | Mersen Canada Toronto Inc. | Methods of manufacturing a complex heat pipe and a heat transfer plate including an opening therefor |
CN105537364A (zh) * | 2016-01-21 | 2016-05-04 | 连云港珍珠河石化管件有限公司 | 一种双金属复合三通管制备方法 |
CN110976547B (zh) * | 2019-11-11 | 2021-02-19 | 潍坊倍力汽车零部件有限公司 | 一种中空层成形方法及多中空层热障管 |
CN113084463B (zh) * | 2021-04-20 | 2022-09-16 | 中国直升机设计研究所 | 一种直升机红外隐身装置外套管加工方法 |
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US4928509A (en) | 1987-07-29 | 1990-05-29 | Mitsui & Co., Ltd. | Method for manufacturing a pipe with projections |
US4840053A (en) * | 1987-07-29 | 1989-06-20 | Mitsui & Co., Ltd. | Method for manufacturing a pipe with projections |
DE4019899C1 (de) * | 1990-06-22 | 1991-12-19 | Benteler Ag, 4790 Paderborn, De | |
US5170557A (en) * | 1991-05-01 | 1992-12-15 | Benteler Industries, Inc. | Method of forming a double wall, air gap exhaust duct component |
DE4125383A1 (de) * | 1991-07-31 | 1993-02-04 | Schlafhorst & Co W | Kannentransportwagen zum automatischen kannenwechsel |
DE4226715A1 (de) | 1992-08-12 | 1994-02-17 | Eberspaecher J | Abgaskrümmer |
US5390494A (en) * | 1993-04-27 | 1995-02-21 | Ap Parts Manufacturing Company | Pipe assembly for efficient light-off of catalytic converter |
ES2081722T3 (es) * | 1993-05-03 | 1996-03-16 | Volkswagen Ag | Tubo acodado. |
US5363544A (en) | 1993-05-20 | 1994-11-15 | Benteler Industries, Inc. | Multi-stage dual wall hydroforming |
US5582052A (en) | 1993-05-20 | 1996-12-10 | Benteler Industries, Inc. | Controlled time-overlapped hydroforming |
DE4339290C2 (de) | 1993-11-18 | 1995-11-02 | Daimler Benz Ag | Verfahren zum Herstellen von Rohr-T-Stücken aus einem unverzweigt durchgehenden Ausgangsrohrstück durch Innenhochdruck-Umformung sowie Vorrichtung zur Durchführung des Verfahrens |
EP0662564B2 (de) * | 1994-01-07 | 2001-09-26 | J. Eberspächer GmbH & Co. | Luftspaltisoliertes Abgasrohr und Verfahren zu seiner Herstellung |
US5649439A (en) * | 1994-04-15 | 1997-07-22 | The Boeing Co. | Tool for sealing superplastic tube |
DE9407812U1 (de) * | 1994-05-11 | 1994-07-21 | Zeuna-Stärker GmbH & Co KG, 86154 Augsburg | Rohrzusammenführung und Vorrichtung zu ihrer Herstellung |
DE4428435A1 (de) * | 1994-08-11 | 1996-02-15 | Huber & Bauer Gmbh | Verfahren zum Herstellen eines luftspaltisolierten Rohres |
DE19511514C1 (de) | 1995-03-29 | 1996-08-01 | Daimler Benz Ag | Abgaskrümmer für eine Brennkraftmaschine |
DE19518252C2 (de) * | 1995-05-18 | 1997-05-22 | Schaefer Maschbau Wilhelm | Verfahren und Vorrichtung zum Herstellen eines metallenen Hosenrohres nach dem Innenhochdruck-Umformverfahren |
US5673470A (en) * | 1995-08-31 | 1997-10-07 | Benteler Automotive Corporation | Extended jacket end, double expansion hydroforming |
DE19546509A1 (de) | 1995-12-13 | 1997-06-19 | Zeuna Staerker Kg | Abgaskrümmer sowie Verfahren zu seiner Herstellung |
DE19713411C2 (de) | 1997-04-01 | 2001-02-15 | Benteler Werke Ag | Verfahren zur Herstellung eines doppelwandigen Abgaskrümmers |
DE19752772C2 (de) * | 1997-11-28 | 1999-09-02 | Daimler Chrysler Ag | Verfahren zur Herstellung eines mit einem Abzweigstutzen versehenen luftspaltisolierten Abgasrohres |
US6182487B1 (en) * | 1998-02-18 | 2001-02-06 | Nippon Sanso Corporation | Metal vessel and a fabrication method for the same |
-
1997
- 1997-11-28 DE DE19752772A patent/DE19752772C2/de not_active Revoked
-
1998
- 1998-10-30 DE DE59803604T patent/DE59803604D1/de not_active Expired - Lifetime
- 1998-10-30 EP EP98120557A patent/EP0919704B1/de not_active Expired - Lifetime
- 1998-11-30 US US09/201,134 patent/US6349468B1/en not_active Expired - Fee Related
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2001
- 2001-09-21 US US09/956,854 patent/US6539764B2/en not_active Expired - Fee Related
- 2001-09-21 US US09/957,540 patent/US6519851B2/en not_active Expired - Fee Related
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DE19752772C2 (de) | 1999-09-02 |
US6539764B2 (en) | 2003-04-01 |
DE19752772A1 (de) | 1999-06-02 |
US6519851B2 (en) | 2003-02-18 |
DE59803604D1 (de) | 2002-05-08 |
US20020014007A1 (en) | 2002-02-07 |
EP0919704A1 (de) | 1999-06-02 |
US6349468B1 (en) | 2002-02-26 |
US20020011002A1 (en) | 2002-01-31 |
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