EP1952904B1 - Forming process for the production of a fold in a heat exchanger tube - Google Patents
Forming process for the production of a fold in a heat exchanger tube Download PDFInfo
- Publication number
- EP1952904B1 EP1952904B1 EP20080000606 EP08000606A EP1952904B1 EP 1952904 B1 EP1952904 B1 EP 1952904B1 EP 20080000606 EP20080000606 EP 20080000606 EP 08000606 A EP08000606 A EP 08000606A EP 1952904 B1 EP1952904 B1 EP 1952904B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fold
- heat exchanger
- tube
- forming
- eckfalzes
- 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.)
- Not-in-force
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/14—Making tubes from double flat material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
Definitions
- the invention relates to a forming method according to the preamble of claim 1.
- the FR 2836546 discloses the production of a pipe with corner seam.
- the US 2003/0145465 A1 apparently, a method of forming a heat exchanger tube, a so-called B-tube, wherein the tube is bent in a plurality of steps before being soldered.
- the WO 02/086408 A1 discloses the production of a so-called B-tube for heat exchangers, wherein on the central web outwardly projecting protrusions are formed.
- the EP 1213555 A1 discloses a so-called B-tube for a heat exchanger, wherein the web for the separation of the two chambers of the B-tube is produced by multiple folds.
- the object of the invention is to optimize the geometry of heat exchanger tubes in the region of the Eckfalzes, in particular with regard to the solderability.
- a further preferred embodiment of the forming process is characterized in that the intermediate space is provided on the inside of the Eckfalzes. This allows a good support of Eckfalzes on the outside.
- a further preferred embodiment of the forming process is characterized in that the groove bottom is inclined towards the intermediate space. Thereby, an undesired buckling of the Eckfalzes be prevented in the gap.
- a sheet metal strip 1 has the shape of a rectangular plate 2, from which a Eckfalz 4 is bent at right angles.
- the sheet metal strip 1 has a thickness S.
- the corner fold 4 is bent by an angle of about 30 degrees.
- the length of Eckfalzes 4 is designated x1.
- the corner fold 4 is bent over approximately 40 degrees.
- the length of Eckfalzes 4 is designated x2.
- the corner fold 4 is bent over by a further 20 degrees.
- the length of Eckfalzes 4 is denoted by x3.
- the corner fold 4 is arranged at an angle of 90 degrees to the rectangular plate 2.
- the width of the rectangular plate 2 is denoted by L3.
- the corner fold 4 is compressed and, if necessary, the width of the rectangular plate 2 is reduced.
- the free end of Eckfalzes 4 is bevelled ⁇ at an angle.
- the length of Eckfalzes 4 is denoted by x4.
- the width of the rectangular plate 2 is denoted by L4.
- the corner fold 4 and optionally the width of the rectangular plate 2 are further reduced.
- the length of Eckfalzes 4 is designated x5.
- the width of the rectangular plate 2 is indicated by L5.
- the free end of Eckfalzes 4 is further bevelled, as indicated by an angle ⁇ .
- the leg height x1 to x3 of the Eckfalzes 4 is preferably kept constant in order to form a sharp corner Falzecke.
- the leg height can also already be reduced in the forming stages 1 to 3 as a function of the ratio of the finished seam height x5 to the pipe wall thickness S from stage to stage.
- the fold is calibrated at least once. During the calibration either the width L3 to L5 is reduced and the seam height is kept constant, or the width L3 to L5 is kept constant and the seam height x3 to x5 is reduced. It is also possible to reduce the folding height x and the width L together.
- the optimum geometry depends on the processing properties of the pipe strip 1 and the ratio of the pipe wall thickness to the finished seam height.
- a bevel is impressed on the strip edge at the free end of the corner fold 4.
- the embossing of the slope allows a top roller contour, in which the rebate width are recessed and therefore can be better demolded.
- the slope is inclined at an angle ⁇ , ⁇ so that it presses the fold on the vertical roller wall, on which the fold 4 can be supported.
- ⁇ angle
- ⁇ angle
- FIG. 2 is a section of a tube 10 shown in cross section.
- the tube 10 is a flat tube of a heat exchanger.
- the tube 10 comprises a tube wall piece 11 which has substantially the shape of a rectangular plate.
- the tube 10 comprises two further tube wall pieces 12 and 13, which are arranged parallel to the tube wall piece 11.
- a Eckfalz 14, 15 is bent at right angles.
- the free ends of the Eckfalze 14 and 15 are soldered to the pipe wall piece 11.
- two tube chambers 16 and 17 are formed in the tube 10.
- the pipe wall thickness is denoted by S.
- the pipe wall thickness in the region of the bend of the Eckfalze is designated by x.
- the outer radius in the region of the bend of the Eckfalzes 14, 15 is denoted by R.
- the finished leg height of Eckfalzes 14, 15 is designated by xF.
- the thickness x in the region of the bend is greater than or equal to the pipe wall thickness S.
- the radius R according to a further aspect of the invention is smaller than the pipe wall thickness S.
- the tube wall pieces 12 and 13 are internally provided with a continuous cladding layer 18, 19.
- the tube wall piece 11 is also provided with a plating layer 20.
- the plating layers 18 to 20 are integrally connected to each other.
- the Rohrwandkammem 16, 17 are provided inside with a complete Schutzplatt réelle. This increases the corrosion resistance.
- solder plating is provided instead of or in addition to protective plating.
- FIG. 4 it can be seen that the free ends 24 and 25 of the Eckfalze 14 and 15 are each beveled at an angle ⁇ . Characterized a wedge-shaped gap is formed between the free ends 24 and 25 and the pipe wall piece 11, which widens to the associated pipe wall chamber 16, 17 out.
- the Eckfalze 14 and 15 are soldered together on their outer side. Furthermore, the free ends 24 and 25 of the Eckfalze 14 and 15 are soldered to the pipe wall piece 11.
- the free ends 28 and 29 of the Eckfalze 14 and 15 may be chamfered in the opposite direction, as indicated by an angle ⁇ .
- ⁇ At the in FIG. 5 illustrated embodiment results from the bevels of the free ends 28 and 29 is a substantially triangular space between the pipe wall piece 11 and the free ends 28, 29 of the corner seams 14, 15. This gap is filled with solder. Due to the beveled or bevelled fold ends, as in the FIGS. 4 and 5 is shown, the wettability of the Falzthetic with solder improved.
- FIG. 6 is a similar representation as in FIG. 4 shown.
- the folding ends are bevelled by an angle ⁇ .
- ⁇ At 32 it is indicated that at the Falzkalibri für a burr may arise. However, this burr does not adversely affect the quality of the heat exchanger tube 10.
- FIG. 7 the heat exchanger tube 10 is shown completely in cross section.
- the pipe wall pieces 12 and 13 are integrally connected to the pipe wall piece 11.
- FIG. 8 a heat exchanger tube 40 is shown in cross section having four Rohrkammem.
- FIG. 9 a section of an upper roller 41 is shown in section, which is rotatable about a rotation axis 42. Furthermore, a lower roller 43 is shown in section, which is rotatable about a rotation axis 44. Between the upper roller 41 and the lower roller 43, a sheet metal strip 1 is arranged, which has the shape of a rectangular plate 2, from which a Eckfalz 4 is bent. The length of Eckfalzes 4 is designated x1.
- FIG. 9 corresponds to the forming stage 1 in FIG. 1 ,
- FIG. 10 corresponds to the forming stage 2 in FIG. 1 ,
- the metal strip 1 is arranged between an upper roller 45 and a lower roller 46.
- FIG. 11 corresponds to the forming step 3 in FIG. 1 ,
- the metal strip 1 is arranged between a further upper roller 47 and a further lower roller 48.
- FIG. 12 a calibration step is indicated.
- the metal strip 1 is arranged between an upper roller 51, which is rotatable about a rotation axis 52, and a lower roller 53, which is rotatable about a rotation axis 54.
- the upper roller 51 is provided with an annular groove in which the Eckfalz 4 is arranged.
- the corner fold 4 rests with its outer side against the upper roller 51.
- a wedge-shaped gap 57 is provided which widens to the rectangular plate 2 out.
- FIG. 13 is the metal strip 1 between an upper roller 61 which is rotatable about a rotation axis 62, and a lower roller 63 which is rotatable about a rotation axis 64.
- the annular groove in which the Eckfalz 4 is arranged wider than in the previous embodiment. This creates between the inside of Eckfalzes 4 and the upper roller 61, a gap 67 which is larger than in the previous embodiment. This has the consequence that at the free end of Eckfalzes 4 burr fi8 can arise. However, this ridge 68 does not affect the solder joint between the corner fold 4 and the associated pipe wall piece (11 in FIG. 2 ).
- FIG. 14 is the 131echstMail 1 between an upper roller 71 which is rotatable about a rotation axis 72, and a lower roller 73 which is rotatable about a rotation axis 74.
- the free end of Eckfalzes 4 is angled in the opposite direction by an angle ⁇ as in the previous embodiments.
- the annular groove, in which the Eckfalz 4 is arranged formed so that the Eckfalz 4 rests with its inner side on the upper roller 71.
- a wedge-shaped gap 77 is formed, which widens to the lower roller 73 out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Coating With Molten Metal (AREA)
- Press Drives And Press Lines (AREA)
Description
Die Erfindung betrifft ein Umformverfahren gemäß dem Oberbegriff von Anspruch 1.The invention relates to a forming method according to the preamble of
Aus der europäischen Patentanmeldung
Die
Die
Die
Die
Aufgabe der Erfindung ist es, die Geometrie von Wärmetauscherrohren im Bereich des Eckfalzes, insbesondere im Hinblick auf die Lötbarkeit, zu optimieren.The object of the invention is to optimize the geometry of heat exchanger tubes in the region of the Eckfalzes, in particular with regard to the solderability.
Die Aufgabe ist bei einem Umformverfahren durch die Merkmale von Anspruch 1 gelöst.The object is achieved in a forming process by the features of
Ein weiteres bevorzugtes Ausführungsbeispiel des Umformverfahrens Ist dadurch gekennzeichnet, dass der Zwischenraum an der Innenseite des Eckfalzes vorgesehen ist. Dadurch wird eine gute Abstützung des Eckfalzes auf der Außenseite ermöglicht.A further preferred embodiment of the forming process is characterized in that the intermediate space is provided on the inside of the Eckfalzes. This allows a good support of Eckfalzes on the outside.
Ein weiteres bevorzugtes Ausführungsbeispiel der Umformverfahrens ist dadurch gekennzeichnet, dass der Nutgrund zu dem Zwischenraum hin geneigt ist. Dadurch kann ein unerwünschtes Ausknicken des Eckfalzes in den Zwischenraum verhindert werden.A further preferred embodiment of the forming process is characterized in that the groove bottom is inclined towards the intermediate space. Thereby, an undesired buckling of the Eckfalzes be prevented in the gap.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung verschiedene Ausführungsbeispiele im Einzelnen beschrieben sind. Es zeigen:
Figur 1- einen Blechstreifen mit einem Eckfalz, der in fünf Umformstufen gebogen und gestaucht wird;
Figur 2- einen Ausschnitt eines erfindungsgemäßen Wärmetauscherrohrs mit zwei Eckfalzen vor dem Verlöten;
Figur 3- einen ähnlichen Ausschnitt wie in
mit einer durchgängigen Plattierschicht;Figur 2 Figur 4- einen ähnlichen Ausschnitt wie in
mit angeschrägten Falzenden nach dem Verlöten;Figur 2 Figur 5- den gleichen Ausschnitt wie in
, wobei die Falzenden in einer anderen Richtung angeschrägt sind;Figur 4 - Figur 6
- einen ähnlichen Ausschnitt wie in
;Figur 4 - Figur 7
- ein Wärmetauscherrohr mit zwei Rohrkammem im Querschnitt;
- Figur 8
- ein ähnliches Wärmetauscherrohr wie in
Figur 7 mit vier Rohrkammern; - Figur 9
- ein Werkzeug mit einer Oberrolle und einer Unterrolle einer ersten Umformstufe;
Figur 10- ein Werkzeug mit einer Oberrolle und einer Unterrolle einer zweiten Umformstufe;
Figur 11- ein Werkzeug mit einer Oberrolle und einer Unterrolle einer dritten Umformstufe;
Figur 12- ein Werkzeug mit einer Oberrolle und einer Unterrolle einer vierten Umformstufe;
Figur 13- eine ähnliche Darstellung wie in
undFigur 12 Figur 14- ein Werkzeug mit einer Oberrolle und einer Unterrolle einer vierten Umformstufe gemäß einem weiteren Ausführungsbeispiel.
- FIG. 1
- a sheet metal strip with a corner fold, which is bent and compressed in five forming steps;
- FIG. 2
- a detail of a heat exchanger tube according to the invention with two Eckfalzen before soldering;
- FIG. 3
- a similar section as in
FIG. 2 with a continuous plating layer; - FIG. 4
- a similar section as in
FIG. 2 with beveled fold ends after soldering; - FIG. 5
- the same section as in
FIG. 4 wherein the fold ends are chamfered in a different direction; - FIG. 6
- a similar section as in
FIG. 4 ; - FIG. 7
- a heat exchanger tube with two Rohrkammem in cross section;
- FIG. 8
- a similar heat exchanger tube as in
FIG. 7 with four tube chambers; - FIG. 9
- a tool with an upper roller and a lower roller of a first forming stage;
- FIG. 10
- a tool with an upper roller and a lower roller of a second forming stage;
- FIG. 11
- a tool with an upper roller and a lower roller of a third forming stage;
- FIG. 12
- a tool with an upper roller and a lower roller of a fourth forming stage;
- FIG. 13
- a similar representation as in
FIG. 12 and - FIG. 14
- a tool with an upper roller and a lower roller of a fourth forming stage according to another embodiment.
In
Nach der dritten Umformstufe ist der Eckfalz 4 in einem Winkel von 90 Grad zu der rechteckigen Platte 2 angeordnet. Die Breite der rechteckigen Platte 2 ist mit L3 bezeichnet. In der vierten Umformstufe werden der Eckfalz 4 gestaucht und gegebenenfalls die Breite der rechteckigen Platte 2 reduziert. Außerdem wird das freie Ende des Eckfalzes 4 in einem Winkel α angeschrägt. Die Länge des Eckfalzes 4 ist mit x4 bezeichnet. Die Breite der rechteckigen Platte 2 ist mit L4 bezeichnet. In dem fünften Umformschritt werden der Eckfalz 4 und gegebenenfalls die Breite der rechteckigen Platte 2 weiter reduziert. Die Länge des Eckfalzes 4 ist mit x5 bezeichnet. Die Breite der rechteckigen Platte 2 ist mit L5 bezeichnet. Außerdem wird das freie Ende des Eckfalzes 4 weiter angeschrägt, wie durch einen Winkel β angedeutet ist.After the third forming step, the
In den drei Umformstufen 1 bis 3 wird der Eckfalz 4 gebogen. Dabei wird die Schenkelhöhe x1 bis x3 des Eckfalzes 4 vorzugsweise konstant gehalten, um eine scharfkantige Falzecke einzuformen. Die Schenkelhöhe kann aber auch bereits in den Umformstufen 1 bis 3 in Abhängigkeit des Verhältnisses der fertigen Falzhöhe x5 zu der Rohrwanddicke S von Stufe zu Stufe reduziert werden. In den Umformschritten 4 und 5 wird der Falz mindestens einmal kalibriert. Bei der Kalibrierung wird entweder die Breite L3 bis L5 verkleinert und die Falzhöhe konstant gehalten, oder die Breite L3 bis L5 konstant gehalten und die Falzhöhe x3 bis x5 reduziert. Es ist auch möglich, die Falzhöhe x und die Breite L gemeinsam zu reduzieren. Die optimale Geometrie ist abhängig von der Verarbeitungseigenschaften des Rohrbandes 1 sowie dem Verhältnis der Rohrwanddicke zur fertigen Falzhöhe.In the three forming
In den Kalibrierstufen 4 und 5 wird an die Bandkante am freien Ende des Eckfalzes 4 eine Schräge angeprägt. Das Anprägen der Schräge ermöglicht eine Oberrollenkontur, in der die Falzbreite ausgespart werden und deshalb besser entformt werden kann. Die Schräge ist in einem Winkel α, β so geneigt, dass sie den Falz an die senkrechte Rollenwand drückt, an der sich der Falz 4 abstützen kann. Dadurch kann ein unerwünschtes Ausknicken des Eckfalzes 4 auf die freie, nicht gestützte Falzseite verhindert werden. Das wiederum führt dazu, dass der Eckfalz 4 stärker komprimiert und somit scharfkantiger geformt werden kann, ohne dass es zu Entformungsproblemen zwischen Rolle und Falz kommt.In the calibration stages 4 and 5, a bevel is impressed on the strip edge at the free end of the
In
In
In
In
In
In
In
In
In
In
In
Claims (3)
- A forming process for the production of a fold (4;14,15) in a heat exchanger tube (10;40), comprising a forming device for producing a fold in a heat exchanger tube (10;40) having at least two tube chambers (16,17), wherein the fold (4;14,15) is bent and upset using rolls (41,43;45,46;47,48;51,53;61,63;71,73), with an upper and/or lower roll (47;51;61;71) which has an angular groove with a groove base for forming the fold, two groove flanks originating from the groove base, characterized in that the fold (4;14;15) is bent and upset in at least three states and, as seen looking at the cross-section of the fold, a substantially wedge-shaped gap (57;67;77) is provided between the fold (4) and once of the groove flanks, the gap widening toward the outsize relative to the upper or slower roll.
- The forming process according to claim 1, characterized in that the intermediate space (57;67) is provides on the inner side of the fold.
- The forming process according to claim 1 or 2, characterized in that the groove base is inclined toward the intermediate space (57;67;77).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007005590A DE102007005590A1 (en) | 2007-02-05 | 2007-02-05 | Forming process and forming device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1952904A2 EP1952904A2 (en) | 2008-08-06 |
EP1952904A3 EP1952904A3 (en) | 2009-02-18 |
EP1952904B1 true EP1952904B1 (en) | 2012-08-29 |
Family
ID=39345116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20080000606 Not-in-force EP1952904B1 (en) | 2007-02-05 | 2008-01-15 | Forming process for the production of a fold in a heat exchanger tube |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1952904B1 (en) |
DE (1) | DE102007005590A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106424264A (en) * | 2016-10-13 | 2017-02-22 | 山东鸿民轧辊模具有限公司 | Design technology for producing side-stacked section materials |
EP3190372A1 (en) * | 2016-01-08 | 2017-07-12 | Mahle International GmbH | Flat tube for a heat exchanger |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106424263B (en) * | 2015-04-09 | 2018-09-04 | 浙江三永机械有限公司 | Escalator skirt panel edge knurling machine |
CN106180334B (en) * | 2016-08-31 | 2017-11-03 | 浙江三永机械有限公司 | A kind of ladder apron plate automatic folding machine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2655181A (en) * | 1949-09-14 | 1953-10-13 | Mccord Corp | Tube construction |
JPS5671520A (en) * | 1979-11-13 | 1981-06-15 | Nissan Motor Co Ltd | Production of tube structural body |
JP3692654B2 (en) | 1996-09-16 | 2005-09-07 | 株式会社デンソー | Flat tube roll forming method and apparatus |
FR2787180B1 (en) * | 1998-12-11 | 2001-03-02 | Valeo Thermique Moteur Sa | FOLDED TUBE FOR HEAT EXCHANGER AND METHOD FOR CONFORMING SAME |
DE60019940T2 (en) * | 1999-09-08 | 2006-02-16 | Zexel Valeo Climate Control Corp. | HEAT EXCHANGE TUBE AND METHOD FOR PRODUCING THE HEAT EXCHANGE TUBE |
FR2823840B1 (en) * | 2001-04-20 | 2004-01-23 | Valeo Thermique Moteur Sa | FOLDED TUBE FOR HEAT EXCHANGER AND METHOD FOR CONFORMING SAME |
US6615488B2 (en) * | 2002-02-04 | 2003-09-09 | Delphi Technologies, Inc. | Method of forming heat exchanger tube |
FR2836546B1 (en) * | 2002-02-22 | 2004-05-07 | Valeo Thermique Moteur Sa | BEND TUBE HEAT EXCHANGER |
JP3941714B2 (en) * | 2003-03-17 | 2007-07-04 | 株式会社デンソー | Tube, tube manufacturing method and tube manufacturing apparatus |
DE102004040257A1 (en) * | 2004-08-18 | 2005-12-15 | Daimlerchrysler Ag | Sheet metal cold rolling assembly for e.g. automotive body parts has axles always at a fixed angle to each other |
-
2007
- 2007-02-05 DE DE102007005590A patent/DE102007005590A1/en not_active Withdrawn
-
2008
- 2008-01-15 EP EP20080000606 patent/EP1952904B1/en not_active Not-in-force
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3190372A1 (en) * | 2016-01-08 | 2017-07-12 | Mahle International GmbH | Flat tube for a heat exchanger |
CN106424264A (en) * | 2016-10-13 | 2017-02-22 | 山东鸿民轧辊模具有限公司 | Design technology for producing side-stacked section materials |
Also Published As
Publication number | Publication date |
---|---|
EP1952904A3 (en) | 2009-02-18 |
EP1952904A2 (en) | 2008-08-06 |
DE102007005590A1 (en) | 2008-08-07 |
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