EP0761336B1 - Verfahren und Werkzeug zur Herstellung eines einstückigen Sammelrohres - Google Patents
Verfahren und Werkzeug zur Herstellung eines einstückigen Sammelrohres Download PDFInfo
- Publication number
- EP0761336B1 EP0761336B1 EP96113674A EP96113674A EP0761336B1 EP 0761336 B1 EP0761336 B1 EP 0761336B1 EP 96113674 A EP96113674 A EP 96113674A EP 96113674 A EP96113674 A EP 96113674A EP 0761336 B1 EP0761336 B1 EP 0761336B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- header tube
- tool
- tube
- punches
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0243—Header boxes having a circular cross-section
Definitions
- the invention relates to a method for producing a one-piece manifold for a heat exchanger genus specified in the preamble of claim 1 and a tool specified in the preamble of claim 6 Genus (see DE-A-4 334 203).
- EP-B-0 198 581 describes a heat exchanger in which the ends of the parallel heat exchanger tubes are accommodated in header tubes.
- slot-shaped openings are made in the wall of the collecting pipes, into which the ends of the heat exchanger pipes are inserted and soldered to the collecting pipe.
- the wall of the collecting tube is designed in a dome shape, since it is necessary to pull the material of the collecting tube far into the collecting tube. This is the only way to ensure that the header pipe is properly seated on the flat sides of the ends of the heat exchanger pipes.
- this configuration is only possible if there is a certain distance between the respective heat exchanger tubes. Such a design is not possible with small distances between adjacent heat exchanger tubes.
- EP-B-0 484 789 describes a method for producing a Breakthrough in the wall of a hollow body Workpiece described, the workpiece in one Tool is used, which is in the area of the intended Breakthrough is provided with a shape.
- the shape has a breakthrough to be created corresponding edge contour, so that when applied of the workpiece with a corresponding internal pressure cutting the workpiece wall in the cavity along the edge of the formation.
- the method is not suitable for a variety of openings arranged close together in one To produce pipe wall, and certainly not can surrounding the openings and directed towards the center of the pipe Flows are generated.
- the present invention is therefore based on the object a method of making a one-piece Collecting tube for a heat exchanger of the generic type Art to create, by the precisely shaped in a simple manner Openings and passages regardless of the cross-sectional shape of the manifold can be generated. Furthermore the task is to be a tool in the generic term of the type mentioned in claim 6, through that in a simple way while reducing tool wear a collecting tube with precisely shaped openings and passages for a heat exchanger can be produced is.
- This task is related to the manufacturing process by a method having the features of claim 1 and with respect to the tool by a tool with the characteristics of claim 6 solved.
- the internal pressure can be between 2 M Pa (20 bar) and 50 M Pa (500 bar). As special the application of an internal pressure is suitable between 4 M Pa and 10 M Pa.
- To at the later heat exchanger manufacture the insertion of the heat exchanger tubes into the openings in the manifold, it is advisable to cover the openings with a To be introduced. These lead-in chamfers will be preferably during a residual stroke when pressing in the stamp creates so that no additional operation is required.
- the invention can differ with manifolds Cross-section can be realized, however, in practice cylindrical tube shapes have the greatest importance. It is therefore appropriate to have the receiving space in the mold to be cylindrical. So that the ring bead at the end of the collecting tube with the one inserted in the mold Pipe can be produced on at least one End of the recording room at a short distance from Front of the header pipe a circumferential annular recess provided.
- the tool shape is formed in two parts, one upper tool part and one lower tool part two same, but mirror images of the common Have formation of the receiving space.
- the stamp are stored in guide openings in the upper part of the tool, this storage is as free of play as possible and only a sufficient for the lubrication of the moving parts Lubricant film must be made possible.
- On the Side of the upper part of the tool facing away from the lower part of the tool the actuating element for the stamp is arranged, which is preferably designed as a pressure plate, in of the stamps in the direction of the working stroke are held. So that the penetration depth of the stamp in the manifold is limited, it is appropriate that the Distance of the working stroke through the maximum distance between a contact surface of the actuating element and one Stop surface of the upper part of the tool is determined.
- the shape of the openings in the manifold is determined by the cross-sectional shape of the heat exchanger tubes, which with the Collecting pipe to be connected.
- For heat exchangers with flat tubes are therefore in the tool for making the Collecting tube stamp to provide an elongated cross-sectional shape with parallel sides and rounded Have narrow sides.
- For heat exchanger tubes with round or oval cross section is of course the shape of the stamp accordingly.
- To make an exact cut in the pipe wall to reach when pressing the stamp is to the Side faces of the stamp a bevel directed towards the tip intended.
- a plug which can be inserted axially into the end of the collecting tube.
- a stopper can, for example have a conical surface and exists preferably at least in the area of the lateral surface a plastic or rubber material. Through the conical The surface area does not depend on the exact diameter because such a shape always centers itself, until the outer surface of the plug extends over the entire Circular circumference of the end of the collector pipe.
- the stopper can however also cylindrical and with an annular Seal.
- the stopper is an elastic ring member includes that between two end clamping elements arranged and radial by the application of axial force is expandable.
- A is preferably used for supplying the pressure fluid pressure medium line attached to the plug. It can the end of the pressure fluid line through the stopper to the side of the manifold facing the interior of the Stopper. If the pressure medium line is not completely through the plug, is the Pressure medium line through a hole in the plug with the Connected interior of the manifold.
- the parting plane of the tool shape 1 runs at the center line M of the header or the receiving space formed by the formations 4, 4 ' 15.
- An end view of the tool shape 1 shows without an inserted collecting tube this representation it can be seen that the formation 4th in the upper part 2 and the shape 4 'in the lower part 3 are identical and together the Form the receiving space 15, which has a cylindrical shape.
- the division plane T between the upper tool part 2 and lower tool part 3 is at the level of Central axis M of the receiving space 15.
- stamp 10 In the upper tool part 2 are radial to the manifold 5th extending guide openings 11 are provided in which Stamp 10 are guided longitudinally.
- the stamp 10 have a front end 12 which is at a short distance to the receiving space 15 or the wall of the therein located manifold 5 is.
- the guide openings 11 and the stamp 10 have an elongated cross-sectional shape with two parallel flat sides, as shown by the 90 ° rotated view of FIG. 11 in Connection with Fig. 1 becomes clear.
- the stamp 10 point one each located at the front end 12 Section 13, which is non-positively in a pressure plate 14 is held.
- the arrow 17 is the direction specified in which the pressure plate 14 with the attached Stamp 10 executes a working stroke, the Distance of the maximum working stroke is specified with S. This distance S is through a contact surface 18 on the Pressure plate 14 and a stop surface opposite this 19 determined on the upper tool part 2.
- Fig. 2 shows the opposite end of the tool shape 1 with the manifold 5 therein, in which State in which the stamp 10 with its front ends 12 penetrated into the interior 7 of the manifold 5 are.
- the interior 7th the manifold 5 filled with a pressure fluid and a Internal pressure of between 2 M Pa and 50 M Pa, preferably approx. 4 M Pa to 10 M Pa.
- This inner pressure supports the tube wall of the collector tube 5 against the radial on the manifold 5 acting stamp 10 so that the tube wall essentially retains its shape and only the area of the openings to be manufactured is deformed becomes.
- the stamp is pressed in radially inward passage 20 formed due to the internal pressure in the manifold 5 to the peripheral surface of the stamp 10 and attaches to this remains. This allows the stamp to penetrate 10 no pressure fluid emerge from the interior 7, so that the internal pressure is maintained.
- FIG. 3 is a section through the end section of the manifold 5 while pressing in Stamp 10 shown. It is located in the front End of the manifold 5, a plug 23, the one Inner sleeve 21 and a concentrically arranged thereon Support sleeve 22 and a ring member 24 made of an elastic Material, for example a rubber or plastic material includes.
- the support sleeve 22 has a radial shoulder 25, with which the support ring 22 on the mold 1 supports.
- the inner sleeve 21 extends through the support sleeve 22 and has a lying within the manifold 5 radial collar 26, being between the front end of the Inner sleeve 21 and the radial collar 26, the ring element 24 is arranged.
- the support sleeve 22 is relative to the inner sleeve 21 can be displaced in the direction of arrow 27 to a limited extent, whereby the distance of the radial surfaces that apply the ring element 24 in the axial direction, is enlarged. This corresponds to the condition of the plug 23 before insertion into the end of the header pipe 5. Since the ring element 24 relaxes in this state this ring element has a diameter, which corresponds to the inside diameter of the collecting tube 5. Since the outer surface of the support sleeve 22 and the radial The collar 26 of the inner sleeve 21 has a slight undersize identify the inside diameter of the collecting tube 5, the plug 23 can be easily inserted until the radial shoulder 25 on the upper tool part 2 and lower tool part 3 is present.
- the ring element 24 By axially moving the inner sleeve 21 against the In the direction of arrow 27, the ring element 24 becomes axial Direction applied so that the material of the ring element 24 tried to evade radially outwards.
- the ring element 24 based on the longitudinal extent of the receiving space 15 is in a plane in which the Receiving space 15 which has annular recess 16, causes the radially from the ring member 24 to the pipe material acting force an expansion of the manifold in Area of the recess 16 so that the tube wall in the depression 16 can be pressed and the annular Expression 6 is formed. This corresponds to that in FIG. 3 position shown.
- the inner sleeve 21 has one axial pressure medium channel 28, which is connected to a pressure medium line 50 is connected and from the pressure fluid a reservoir 52 by means of a pump 51 into the interior 7 of the manifold 5 can be fed. Apart from the pressure medium channel 28 is the interior 7 of the manifold 5 completely closed, so that for the Internal support of the manifold required pressure can be built. Since the plug 23 during Pressure build-up and the pressure maintenance phase in the shown in Fig. 3 Position, the ring member 24 provides a reliable seal against the leakage of the Pressure fluids.
- the pressure plate 14 in the direction of the arrow 17 moves, causing the stamp 10 with their front Ends 12 are pushed into the collecting tube. Because of of the internal pressure becomes the tube wall of the collector tube supported so that only the openings with these Surrounding passages 20 are generated. Before the printing plate 14 and the stamp 10 counter a working stroke the direction of arrow 17, the pressure in the manifold degraded and the pressure fluid, if necessary, in a corresponding one Memory returned. Only then does that happen Removing the stamp 10 from the manifold 5 and that Open the tool mold 1 so that the manifold from the Tool shape can be ejected.
- FIG. 4 shows the top view of a manifold 5 with arranged near each end of the manifold Characteristics 6 and a variety of slot-like openings 29, equally spaced, parallel to each other running and orthogonal to the longitudinal direction of the header are arranged.
- the distance of the outer Opening 29 to the respective end face of the collecting tube 5 can be chosen arbitrarily and is essentially due to installation conditions of the heat exchanger, location and Direction of the connecting piece and the like determined.
- the manifold 5th has a circular cross section and the opening 29 sickle-shaped over a certain arc angle in extends the pipe wall.
- the arc angle ⁇ is approximately 70 °, but they are also slit-like Openings 29 with an arc angle of up to approximately 150 ° possible. Extends along the edge of the openings 29 the passage 20, its contour along the parallel Side surfaces are also sickle-shaped.
- the Passage 20 near the outer surface of the manifold 5 has an outwardly widening contour, which, for example, can also be designed as an insertion bevel 31 can, is an inner circumferential surface 30 as a contact surface trained for a heat exchanger tube to be installed later.
- a radially inner edge 32 of the passage 20 is again slightly expanded, so that it is on the inside of the passage 20 on the later in the header 5 used heat exchanger tube forms a solder meniscus.
- Fig. 6 shows a section along the line VI - VI in Fig. 5. It can be seen that the outer contour the manifold 5 is completely flat and only by the openings 29 made in the tube wall are interrupted becomes.
- the passages 20 of the openings 29 have the same contour with surfaces 30 and the inside of the pipe directed extended edge 32, as already stated Fig. 5 has been described.
- FIG. 7 shows an embodiment variant of FIG. 5 with a in the slot-like opening 29 inserted one end Heat exchanger tube 43.
- One is the slot-like Opening 29 surrounding passage 33 is provided, the one protruding beyond the outer surface of the tube wall Compression 34 has.
- the passage 33 points in contrast 5 does not have a section with parallel surfaces, but an arched contour that matches the lateral surface of the heat exchanger tube 43 comes into contact. Both on the inside of the manifold 5 as well as on the outside are clear through the shape of the passage 33 Solder menisci formed.
- Fig. 8 shows the front end 12 of the stamp 10, the is integrally formed on a stamp shaft 39 and a tip 35 with extending in the direction of the narrow sides 36, 36 ' Inclined surfaces 37 which blunt Include angle ⁇ between them.
- On the sloping surfaces 37 is followed by a section 38 with an axial contour, this axial section orthogonal to the longitudinal axis of the stamp 10 has a slightly smaller width than the extension of the side surfaces between the narrow sides 36 and 36 'of the punch shaft 39.
- a shoulder 40 is formed, which corresponds to the desired contour on the Outside of the draft a more or less strong Shows slope.
- stamp shaft 39 is on parallel side surfaces 41 with the tip 35 provided bevels 42, these bevels enclose an angle ⁇ ⁇ 40 ° between them. In the embodiment of FIG. 9, the angle is ⁇ about 20 °.
- FIG 10 shows an arrangement similar to that in FIG Fig. 2.
- a plug 44 For pressure-tight sealing of the manifold 5 serves a plug 44 with a conical outer surface in FIG 45, whereby the plug 44 when inserted into the Centered front of the manifold 5 itself and that securely closes the end of the header pipe.
- the plug 44 is on the end of a pressure medium line 46 attached so that the pressure medium line immediately opens into the interior 7 of the manifold 5.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Punching Or Piercing (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
Zur Herstellung eines Rohres mit mehreren in der Rohrwandung angeordneten Öffnungen mit nach innen gerichteten Durchzügen ist es aus der US-A-4,679,289 bekannt, eine Innenmatrize in das Rohr einzuführen, die eine Abstützung des Rohres beim Eindrücken der Stempel gewährleistet. Auf diese Weise lassen sich in der Rohrwandung Öffnungen herstellen, die exakt geformte Durchzüge aufweisen und wobei die zwischen benachbarten Öffnungen liegenden Abschnitte des Sammelrohres der ursprünglichen Rohrkontur entsprechen. Eine derartige Innenmatrize muß jedoch wegen des mehrstufigen Entformungsvorgangs zweiteilig ausgeführt werden, so daß das entsprechende Werkzeug aufwendig ist. Die in zeitlich aufeinander folgenden Stufen durchgeführte Entformung der Innenmatrize wirkt sich auf die Taktzeiten zur Herstellung eines derartigen Sammelrohres aus.
- Fig. 1
- einen Ausschnitt einer Werkzeugform mit eingelegtem Sammelrohr vor dem Eindrücken der Stempel,
- Fig. 2
- einen Ausschnitt der Werkzeugform mit in das Sammelrohr eingedrückten Stempeln,
- Fig. 3
- einen Schnitt durch den Endbereich des Sammelrohres mit Abdichtung und Druckmittelanschluß,
- Fig. 4
- die Draufsicht auf ein nach dem erfindungsgemäßen Verfahren hergestelltes Sammelrohr,
- Fig. 5
- eine vergrößerte Darstellung eines Schnitts entlang der Linie V - V in Fig. 4,
- Fig. 6
- einen Schnitt entlang der Linie VI - VI in Fig. 5,
- Fig. 7
- eine Ausführungsvariante zu Fig. 5,
- Fig. 8
- die Darstellung des vorderen Endes eines Stempels,
- Fig. 9
- eine Ansicht in Richtung des Pfeiles IX in Fig. 8,
- Fig. 10
- eine Ausführungsvariante zu Fig. 2,
- Fig. 11
- eine stirnseitige Ansicht der Werkzeugform ohne eingelegtes Sammelrohr.
Claims (16)
- Verfahren zur Herstellung eines einstückigen Sammelrohres (5) für einen Wärmetauscher, insbesondere Kühlmittelkühler für ein Kraftfahrzeug, bei dem mehrere Öffnungen (29) mit zur Innenseite des Sammelrohres (5) gerichteten Durchzügen (20, 33) in der Rohrwandung durch Eindrücken von radial auf die Rohrwandung einwirkenden Stempeln (10) erzeugt werden, gekennzeichnet durch folgende Verfahrensschritte:a) das Sammelrohr (5) wird in eine in dessen Längsrichtung geteilte Werkzeugform (1), welche die Kontur des Sammelrohres (5) aufweist, eingelegt und die Werkzeugform (1) geschlossen,b) an das Sammelrohr (5) wird stirnseitig eine Druckmittelzuführung angeschlossen und im übrigen erfolgt die Abdichtung der Sammelrohrenden,c) der Innenraum (7) des Sammelrohres (5) wird durch die Druckmittelzuführung mit einem Druckfluid gefüllt, so daß das Sammelrohr (5) mit einem vorbestimmten Innendruck beaufschlagt ist,d) die Stempel (10) treffen mit einer mindestens annähernd mittig zwischen Schmalseiten (36, 36') angeordneten Spitze (35) auf die Rohrwandung des Sammelrohres (5) auf und dringen mit von der Spitze (35) ausgehenden Schrägflächen (37) in die Rohrwandung ein,e) beim Durchstoßen der Rohrwandung mittels der Stempel (10) werden die zur Innenseite des Sammelrohres (5) gerichtete Durchzüge (20, 33) erzeugt, die sich dichtend an den Umfang des jeweiligen Stempels (10) anlegen,f) der Druck im Sammelrohr (5) wird durch stirnseitig aus dem Sammelrohr abgeführtes Druckfluid abgebaut,g) die Stempel (10) werden aus dem Sammelrohr (5) gezogen und das Sammelrohr aus der Werkzeugform (1) ausgeworfen.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet,
daß nach dem Schließen der Werkzeugform (1) an dem Sammelrohr(5) nahe dessen Stirnseiten in Umfangsrichtung verlaufende, ringfömige Ausprägungen (6) erzeugt werden. - Verfahren nach Anspruch 2, dadurch gekennzeichnet,
daß die ringfömigen Ausprägungen (6) durch axiale Kompression eines Ringelementes (24) erzeugt werden, wodurch eine radial nach außen wirkende Preßkraft entsteht, welche die Rohrwand in eine entsprechende Ausnehmung (16) in der Werkzeugform (1) drückt. - Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet,
daß das Sammelrohr (5) mit einem Innendruck zwischen 2 M Pa und 50 M Pa, vorzugsweise zwischen 4 M Pa und 10 M Pa beaufschlagt wird. - Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet,
daß während eines Resthubs beim Eindrücken der Stempel (10) an den Durchzügen (20, 33) eine Einführschräge (31) geformt wird. - Werkzeug zur Herstellung eines einstückigen Sammelrohres (5) für einen Wärmetauscher mit Stempeln (10) zum radialen Durchdringen der Wandung des Sammelrohres (5) zum Einbringen mehrerer Öffnungen (29) mit in das Sammelrohr (5) gerichteten Durchzügen (20, 33), dadurch gekennzeichnet,
daß das Werkzeug eine mehrteilige Werkzeugform (1) mit einem Aufnahmeraum (15) für das Sammelrohr (5) umfaßt, wobei die Werkzeugform (1) eine in Längsrichtung des Sammelrohres (5) verlaufende Teilungsebene (T) aufweist und in einem Teil der Werkzeugform mehrere Stempel (10) zur Ausführung eines Arbeitshubs längsverschieblich gelagert und mit einem Betätigungselement (14) verbunden sind, wobei die Stempel (10) eine längliche Querschnittsform mit Schmalseiten (36) aufweisen und das vordere Ende (12) der Stempel (10) als Spitze (35) mit zu den Schmalseiten (36) verlaufenden Schrägflächen (37) ausgebildet ist, und daß das Werkzeug mindestens ein Mittel zum druckdichten Verschließen der Enden des Sammelrohres (5) und Zuführung eines Druckfluids in einen Innenraum (7) des Sammelrohres (5) aufweist. - Werkzeug nach Anspruch 6, dadurch gekennzeichnet,
daß der Aufnahmeraum (15) die Form eines Zylinders aufweist. - Werkzeug nach Anspruch 6 oder 7, dadurch gekennzeichnet,
daß an mindestens einem Ende des Aufnahmeraumes (15) in geringem Abstand zur Stirnseite des Sammelrohres (5) eine in Umfangsrichtung verlaufende ringförmige Vertiefung (6) vorgesehen ist. - Werkzeug nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet,
daß die Werkzeugform (1) zweiteilig ausgebildet ist, wobei ein Werkzeugoberteil (2) und ein Werkzeugunterteil (3) gleiche, jedoch Spiegelbildliche Ausformungen (4) zur gemeinsamen Bildung des Aufnahmeraumes (15) aufweisen und vorzugsweise die Stempel (10) in Führungsöffnungen (11) des Werkzeugoberteils (2) gelagert sind und das Betätigungselement (14) auf der dem Werkzeugunterteil (3) abgewandten Seite des Werkzeugoberteils (2) angeordnet ist. - Werkzeug nach Anspruch 9, dadurch gekennzeichnet,
daß das Betätigungselement als Druckplatte (14) ausgebildet ist, in der die Stempel (10) in Richtung des Arbeitshubs (17) kraftschlüssig gehalten sind, wobei vorzugsweise die Strecke (S) des Arbeitshubs durch den maximalen Abstand zwischen einer Anlagefläche (18) des Betätigungselementes (14) und einer Anschlagfläche (19) des Werkzeugoberteils (2) bestimmt ist. - Werkzeug nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet,
daß die Stempel (10) parallele Seitenflächen (41) aufweisen und die Schmalseiten (36) gerundet sind, wobei sich an die Schrägflächen (37) ein axialer Abschnitt (38) anschließt, dessen parallele Seitenflächen etwas kürzer sind als die eines Stempelschaftes, so daß zwischen dem Abschnitt und dem Stempelschaft ein Absatz gebildet und an den Seitenflächen (41) eine zur Spitze (35) gerichtete Anschrägung (42) vorgesehen ist. - Werkzeug nach einem der Ansprüche 6 bis 11, dadurch gekennzeichnet,
daß zum druckdichten Verschließen ein axial in das Ende des Sammelrohres (5) einführbarer Stopfen (8, 8'; 23; 44) vorgesehen ist. - Werkzeug nach Anspruch 12, dadurch gekennzeichnet,
daß der Stopfen (44) eine konische Mantelfläche (45) aufweist und vorzugsweise mindestens im Bereich der Mantelfläche (45) aus einem Kunststoff oder Gummimaterial besteht. - Werkzeug nach Anspruch 13, dadurch gekennzeichnet,
daß der Stopfen (8, 8'; 23) zylindrisch ausgebildet und mit einer ringförmigen Dichtung (9, 24) versehen ist. - Werkzeug nach Anspruch 13, dadurch gekennzeichnet,
daß der Stopfen (23) ein elastisches Ringelement (24) umfaßt, das zwischen zwei stirnseitigen Spannelementen (22, 26) angeordnet und durch axiale Kraftbeaufschlagung radial aufweitbar ist, wobei vorzugsweise das Ringelement (24) aus Polyurethan besteht. - Werkzeug nach einem der Ansprüche 12 bis 15, dadurch gekennzeichnet,
daß zur Zuführung des Druckfluids eine an einem der Stopfen (23, 44) befestigte Druckmittelleitung (46) und in dem Stopfen (23) ein Druckmittelkanal (28) vorgesehen ist, der die Druckmittelleitung mit dem Innenraum (7) des Sammelrohres (5) verbindet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19532860 | 1995-09-06 | ||
DE19532860A DE19532860A1 (de) | 1995-09-06 | 1995-09-06 | Verfahren und Werkzeug zur Herstellung eines einstückigen Sammelrohres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0761336A1 EP0761336A1 (de) | 1997-03-12 |
EP0761336B1 true EP0761336B1 (de) | 1999-11-10 |
Family
ID=7771382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96113674A Expired - Lifetime EP0761336B1 (de) | 1995-09-06 | 1996-08-27 | Verfahren und Werkzeug zur Herstellung eines einstückigen Sammelrohres |
Country Status (4)
Country | Link |
---|---|
US (1) | US5737952A (de) |
EP (1) | EP0761336B1 (de) |
DE (2) | DE19532860A1 (de) |
ES (1) | ES2138279T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006028490A1 (de) * | 2005-07-05 | 2007-05-10 | Modine Korea Llc, Asan | Verfahren zum Herstellen eines Sammelrohres, Sammeltank mit Sammelrohr und Wärmeaustauscher mit Sammeltank |
CN102950220A (zh) * | 2012-10-27 | 2013-03-06 | 安徽多达皖晶新能源有限公司 | 一种导流管的导流孔加工定位装置 |
Families Citing this family (33)
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US6591648B1 (en) * | 2002-06-24 | 2003-07-15 | Greenville Tool & Die Company | Method of stamping and piercing a tube |
DE102004047891A1 (de) * | 2003-10-02 | 2005-05-25 | Behr Gmbh & Co. Kg | Ladeluftkühler für Kraftfahrzeuge |
US6931901B2 (en) * | 2003-10-21 | 2005-08-23 | General Motors Corporation | Method and apparatus for forming a threaded hole in a hydroformed part |
SE526316C2 (sv) * | 2003-12-09 | 2005-08-23 | Nexplo Bofors Ab | Sätt och anordning för framställning av drivknut för laddningar med hög laddensitet och hög progressivitet |
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US7284403B2 (en) * | 2004-12-28 | 2007-10-23 | Torque-Traction Technologies Llc | Apparatus and method for performing a hydroforming process |
SE528938C2 (sv) * | 2005-02-08 | 2007-03-20 | Ortic Ab | Hydroformningsenhet |
EP1775540B1 (de) | 2005-10-12 | 2015-12-23 | MAHLE Behr GmbH & Co. KG | Sammelrohr für einen Wärmeübertrager |
DE102011013209A1 (de) | 2011-03-05 | 2012-09-06 | Modine Manufacturing Co. | Herstellungsverfahren für Schlitze und Schlitzwerkzeug |
US9308664B2 (en) * | 2012-07-12 | 2016-04-12 | Modine Manufacturing Company | System and method for producing apertures in tubes |
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ITUA20162257A1 (it) * | 2016-04-01 | 2017-10-01 | Bertini Macch S R L | Macchina per la formatura e per la sagomatura di un tubolare metallico, come un tubo |
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JP6990487B2 (ja) * | 2017-07-28 | 2022-01-12 | 三桜工業株式会社 | パイプ端部加工装置 |
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-
1995
- 1995-09-06 DE DE19532860A patent/DE19532860A1/de not_active Withdrawn
-
1996
- 1996-08-27 EP EP96113674A patent/EP0761336B1/de not_active Expired - Lifetime
- 1996-08-27 DE DE59603615T patent/DE59603615D1/de not_active Expired - Lifetime
- 1996-08-27 ES ES96113674T patent/ES2138279T3/es not_active Expired - Lifetime
- 1996-09-05 US US08/708,723 patent/US5737952A/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006028490A1 (de) * | 2005-07-05 | 2007-05-10 | Modine Korea Llc, Asan | Verfahren zum Herstellen eines Sammelrohres, Sammeltank mit Sammelrohr und Wärmeaustauscher mit Sammeltank |
CN102950220A (zh) * | 2012-10-27 | 2013-03-06 | 安徽多达皖晶新能源有限公司 | 一种导流管的导流孔加工定位装置 |
Also Published As
Publication number | Publication date |
---|---|
ES2138279T3 (es) | 2000-01-01 |
EP0761336A1 (de) | 1997-03-12 |
DE19532860A1 (de) | 1997-03-13 |
DE59603615D1 (de) | 1999-12-16 |
US5737952A (en) | 1998-04-14 |
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