EP0930479B1 - Method for the connection of pipes and device for carrying out the same - Google Patents

Method for the connection of pipes and device for carrying out the same Download PDF

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Publication number
EP0930479B1
EP0930479B1 EP99100560A EP99100560A EP0930479B1 EP 0930479 B1 EP0930479 B1 EP 0930479B1 EP 99100560 A EP99100560 A EP 99100560A EP 99100560 A EP99100560 A EP 99100560A EP 0930479 B1 EP0930479 B1 EP 0930479B1
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EP
European Patent Office
Prior art keywords
plate
pipe
expansion
pipe end
tube
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Expired - Lifetime
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EP99100560A
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German (de)
French (fr)
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EP0930479A2 (en
EP0930479A3 (en
Inventor
Michael Stahl
Michael Kroll
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ITC Rohrtechnik GmbH
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ITC Rohrtechnik GmbH
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Publication of EP0930479A3 publication Critical patent/EP0930479A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in

Definitions

  • the invention is based on a method of manufacture a provisional positive and frictional connection between a pipe end and a bore Plate according to the genus of the main claim and one Device for performing the method according to the Preamble of claim 6.
  • the problem underlying the invention always occurs on when connecting a pipe end to a one Hole for receiving the tube end plate a first step in which the position of the tube and plate mutually determined, a second operation follows, at which is a final connection of the two parts and this second operation at a different location, for example, a soldering oven.
  • a second operation follows, at which is a final connection of the two parts and this second operation at a different location, for example, a soldering oven.
  • this manufacturing process when it comes to pipes with a small wall thickness, so that it is difficult to Tearing the pipe end into the bore a preliminary form and smooth connection between pipe and plate too reach until they are fed to the next operation. It is particularly difficult to make such a preliminary connection effect when it comes to products that are larger Series must be manufactured.
  • the inventive method with the characteristic Features of the main claim and those of claim 6, namely the device for performing the method in contrast, the advantage that the preliminary connection in more reliable but also simpler and therefore cheaper Way is producible.
  • the connection is relative insensitive, so that the removal of the workpiece a corresponding device as well Further transport to the device in which the workpiece can be processed, is easy.
  • the invention not only thin-walled pipes can be made with such plates connect, but also thick-walled.
  • Particularly advantageous is the application of the invention to pipes with diameters greater than 10 mm and wall thicknesses of less than 1 mm.
  • the advantages of the invention prove themselves in particular.
  • the process is expanded by retracting one Expanding device from the free side of the pipe end.
  • the Hold the two parts in the desired position can be completely independent and without any obstacle the expansion process.
  • the expansion takes place without additional temperature influence, but purely mechanical, which makes the whole facility can be kept relatively simple and not on temperature sensitive parts must be taken into account got to.
  • the next procedural step will be the preliminary interconnected parts a final Connection method supplied. It can be act, for example, a brazing process, but also another connection method, such as welding, gluing, Soft soldering etc. It is decisive that the provisional connection the parts transport to this next process step enables without separating the parts become.
  • the expanding device as Radial stamping tool designed with on one Hollow piston arranged spreading jaws, with a inside the working hollow piston for embossing this axially displaceable tie rod and with a attacking on the radial inside of the expanding jaws Working cone on the drawbar.
  • the invention increases the working cone in the direction of entry Tool holder or the radial embossing tool, the Drawbar for embossing work against this direction is moved. This is mainly achieved in that Embossing process not only the end of the end section of the Tube is expanded, but the entire in the hole the plunge section, creating an even Force distribution of the connection is guaranteed. At a such a preliminary connection is less important that seen on the extent of expansion a uniform Expansion takes place, but that according to the Spreading jaw design and circumferential distribution a connection is achieved, the even distribution of the holding force causes.
  • the device according to the invention is actuated Drawbar via a working cylinder drive with the drawbar as a piston and the working hollow piston as a cylinder, which on Tool holder is attached. Because tie rod and Hollow piston as a work unit with the tool holder this combination of pull rod and Working piston to a working cylinder spatial and on functional advantages.
  • the fixing device has a holding device for the tube on and an ejection device for removing the connected parts.
  • the fixing device itself is fixed as such connected to the machine frame and thereby the assigned to other devices immobile. hereby there is advantageously the possibility of one of the other devices functionally independent devices, such as the Holding device and the ejection device on the Put down the fixing device.
  • the clamping device is fixed in and against the direction Fixing device guided, adjustable. This can result in the Fixing device held tube with the clamping device the plate be clamped before over the Radial embossing tool the connection between the parts is produced, after which the clamping device the plate releases, which then together with him now connected pipe is removed from the fixing device.
  • the clamping device has guide sections for receiving the plate so that after inserting the plate into the Guide sections and retraction of the tensioning device in The hole in the plate exactly over the direction of the fixing device the end of the tube can be pushed, after which the Embossing process can begin.
  • the plate itself can be one have different thicknesses
  • the guide sections can be, for example, adjustment pins, which on a parallel movable clamping plate of the clamping device can be arranged, on this adjusting pin simple Means such as round cord rings may be present can, the plate serving as a workpiece in the transport position to hold on the clamping plate.
  • the as Workpiece serving plate is a flange that with the pipe is to be connected, the rest can be in one such flange existing the subsequent screwing serving holes for receiving the adjusting pin.
  • the sliding devices are actuated, such as Clamping device, tool holder etc. via hydraulic or pneumatically driven working cylinders.
  • Working cylinder which is extremely inexpensive as a standard part are available, can control the Longitudinal movements take place.
  • limit switches are in Large series manufactured and enable a precise Path control, the manufacturing program given here easiest to control via an electronic control unit is.
  • a thin-walled Tube 1 in a bore 2 of a connector such as for example, a flange 3 is stamped such that also the mounting position of flange 3 without additional holding devices on tube 1 for the next processing step, namely that Soldering of the two parts is guaranteed.
  • This can the additional procedural steps otherwise required be saved, either keeping the two parts in their assembled position until the brazing process ends would be, or a stitching of the two parts together, which is not would only be time-consuming, but also for material order or Material deformation could result.
  • the hole 2 of the flange 3 inserted end portion of the tube 1 over a corresponding device expanded and thereby with the Bored wall of the flange 3 embossed.
  • This embossment is not completely related to the pipe circumference, but only over most of the scope, as shown below the drawing of the device according to the invention described.
  • Figures 1 and 2 is a stamping machine in plan view and side view and shown in partial sections.
  • the stamping machine is in its initial position or in the position shown, which they after the embossing process and before a new stamping process.
  • Figure 2 is them in working position after embossing and around the Longitudinal axis shown rotated by 90 °.
  • the stamping machine has a holding plate 4, several Drive cylinder 5 and one connected to it, in parallel to the holding plate displaceable clamping plate 6 on which facing the holding plate 4, two adjusting pins 7 arranged are.
  • the Clamping plate 6 is via two compressed air cylinders 19, by deneen only one is shown parallel in the direction of arrow VII postponed. Then the flange 3 is in the in Figure 1 Position shown in dash-dotted lines, being on him intended, later serving for a screw connection Flange bores 8 are placed on the adjustment pin 7. In are an annular groove on the free end portion of the adjusting pin 7 arranged three round cord rings 9 through which the Flange 3 will hold the clamping plate 6.
  • a stamping device 12 displaceable, with a spreading jaw 13 Working piston 14 and one coaxial with it and axially displaceable mounted tie rod 15, on her, the expanding jaws assigned section has an expansion cone 16.
  • the Pull rod 15 is also in sections of a hollow piston 23 surrounded, which to actuate the status as Working cylinder and the pull rod 15 as their working piston serves.
  • the stamping device 12 is on a tool holder 17 arranged in the axial direction of the working piston 14 and the Drawbar 15 is slidably mounted on working cylinder 18.
  • the first is Pull rod 15 pushed back towards VI so that the Spreading jaws 13 loaded by round cord rings 22 in their Radially decrease from the original position, then successively first the tool holder 17 and then the clamping plate 6 in the in Figure 1 shown starting position can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The tube connecting process provides a temporary connection between a tube and the boring of a plate. The tube is fixed with the end freely projecting. The plate is mounted on the tube by its boring. Sectors of the tube end are widened radially while stamping the material of tube and plate and the tube outer surface and inner wall of the boring in the plate. An Independent claim is also included for the device used for the tube connecting process including a fixing device (4) and a clamping device (6), between which the end of the tube (1) and the plate (3) are fixed. A tool holder (17) can move the tube end axially.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Verfahren zur Herstellung einer vorläufigen form- und reibschlüssigen Verbindung zwischen einem Rohrende und einer eine Bohrung aufweisenden Platte nach der Gattung des Hauptanspruchs sowie einer Vorrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Anspruchs 6.The invention is based on a method of manufacture a provisional positive and frictional connection between a pipe end and a bore Plate according to the genus of the main claim and one Device for performing the method according to the Preamble of claim 6.

Das der Erfindung zugrundeliegende Problem tritt immer dann auf, wenn beim Verbinden von einem Rohrende mit einer eine Bohrung zur Aufnahme des Rohrendes aufweisenden Platte einem ersten Arbeitsgang in dem die Lage von Rohr und Platte zueinander bestimmt wird ein zweiter Arbeitsgang folgt, bei dem eine endgültige Verbindung der beiden Teile erfolgt und wobei dieser zweite Arbeitsgang an einer anderen Stelle, beispielsweise einem Lötofen erfolgt. Besonders schwierig ist dieser Fertigungsvorgang, wenn es sich um Rohre mit einer geringen Wanddicke handelt, so daß es schwierig ist, nach Einrissen des Rohrendes in die Bohrung eine vorläufige formund reibflüssige Verbindung zwischen Rohr und Platte zu erreichen, bis diese dem nächsten Arbeitsgang zugeführt sind. Besonders schwierig ist es eine solche vorläufige Verbindung zu bewirken, wenn es sich um Produkte handelt, die in größerer Serie hergestellt werden müssen. Bei Rohren mit dickerer Wandstärke ist es bekannt, diese über das WIG-Schweißen mit der Platte zu verbinden, was jedoch bei den dünnwandigen Rohren kaum möglich ist. Man hat daraufhin die vorläufige Verbindung zwischen Rohr und Platte durch Heften an einzelnen Punkten mit Hilfe des WIG-Schweißverfahrens vorgenommen, um danach die derart vorläufig verbundenen Teile hart zu löten. Hierbei hat sich herausgestellt, daß besonders für Großserien ein solches Verfahren viel zu zeitaufwendig und auch von der Einrichtung her zu teuer ist.The problem underlying the invention always occurs on when connecting a pipe end to a one Hole for receiving the tube end plate a first step in which the position of the tube and plate mutually determined, a second operation follows, at which is a final connection of the two parts and this second operation at a different location, for example, a soldering oven. Is particularly difficult this manufacturing process when it comes to pipes with a small wall thickness, so that it is difficult to Tearing the pipe end into the bore a preliminary form and smooth connection between pipe and plate too reach until they are fed to the next operation. It is particularly difficult to make such a preliminary connection effect when it comes to products that are larger Series must be manufactured. For pipes with thicker Wall thickness, it is known to use this via TIG welding the plate to connect, but what with the thin-walled Pipe is hardly possible. You then have the provisional one Connection between tube and plate by stapling on individual Points made using the TIG welding process, in order to then hard solder the parts temporarily connected in this way. It has been found that especially for large series such procedure is far too time consuming and also of the Setup is too expensive.

Bei den dargestellten Verfahren handelte es sich um die Bearbeitung von Metall. Grundsätzlich läßt sich dieses Problem jedoch auch auf Verfahren zur Verbindung anderer Stoffe, wie beispielsweise Harze oder Kunststoffe übertragen, bei denen Rohre mit Platten zu verbinden sind und ein zweiter endgültig verbindender Arbeitsgang an einer separaten Stelle erfolgt.The procedures shown were Machining of metal. Basically, this problem can be solved however, also on methods for combining other substances, such as for example, transfer resins or plastics in which Pipes to be joined with plates and a second one is final connecting operation takes place in a separate place.

Die Erfindung und ihre VorteileThe invention and its advantages

Das erfindungsgemäße Verfahren mit den kennzeichnenden Merkmalen des Hauptanspruchs sowie denen des Anspruchs 6, nämlich der Vorrichtung zur Durchführung des Verfahrens hat demgegenüber den Vorteil, daß die vorläufige Verbindung in zuverlässiger aber auch einfacher und damit kostengünstiger Weise herstellbar ist. Die Verbindung ist verhältnismäßig unempfindlich, so daß auch das Entnehmen des Werkstücks einer entsprechenden Vorrichtung als auch das Weitertransportieren zu der Vorrichtung, in der das Werkstück weiterbearbeitet werden kann, problemlos ist. Mit der Erfindung lassen sich nicht nur dünnwandige Rohre mit solchen Platten verbinden, sondern auch dickerwandige. Besonders vorteilhaft ist die Anwendung der Erfindung bei Rohren mit Durchmessern größer als 10 mm und Wandstärken von weniger als 1 mm. Besonders bei dünnwandigen Rohren und verhältnismäßig großem Durchmesser, beispielsweise von Rohren 30 x 0,5 mm bewähren sich die Vorteile der Erfindung besonders.The inventive method with the characteristic Features of the main claim and those of claim 6, namely the device for performing the method in contrast, the advantage that the preliminary connection in more reliable but also simpler and therefore cheaper Way is producible. The connection is relative insensitive, so that the removal of the workpiece a corresponding device as well Further transport to the device in which the workpiece can be processed, is easy. With the invention not only thin-walled pipes can be made with such plates connect, but also thick-walled. Particularly advantageous is the application of the invention to pipes with diameters greater than 10 mm and wall thicknesses of less than 1 mm. Especially with thin-walled pipes and relatively large diameter, for example of pipes 30 x 0.5 mm the advantages of the invention prove themselves in particular.

Nach einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens erfolgt das Aufweiten durch Einfahren einer Aufweiteinrichtung von der freien Seite des Rohrendes her. Das Halten der beiden Teile in der zueinander gewünschten Lage kann dadurch völlig unabhängig und ohne Hindernis gegenüber dem Aufweitvorgang erfolgen.According to an advantageous embodiment of the invention The process is expanded by retracting one Expanding device from the free side of the pipe end. The Hold the two parts in the desired position can be completely independent and without any obstacle the expansion process.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung werden deshalb vor dem Aufweiten des Rohrendes die beiden Teile, nämlich Rohr und Platte miteinander verspannt. Dieses kann durch alle möglichen denkbaren Mittel oder Vorrichtungen erfolgen, maßgebend ist, daß die Einspannung der Teile beim Aufweitvorgang nicht verändert wird.According to a further advantageous embodiment of the invention therefore, before expanding the pipe end, the two Parts, namely tube and plate clamped together. This can by any conceivable means or devices is decisive that the clamping of the parts at Expansion process is not changed.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung erfolgt die Aufweitung ohne zusätzlichen Temperatureinfluß, sondern rein mechanisch, wodurch die ganze Einrichtung verhältnismäßig einfach gehalten werden kann und nicht auf temperaturempfindliche Teile Rücksicht genommen werden muß.According to a further advantageous embodiment of the invention the expansion takes place without additional temperature influence, but purely mechanical, which makes the whole facility can be kept relatively simple and not on temperature sensitive parts must be taken into account got to.

Nach einer weiteren Ausgestaltung des erfinderischen Verfahrens werden als nächstem Verfahrensschritt die vorläufig miteinander verbundenen Teile einem endgültigen Verbindungsverfahren zugeführt. Hierbei kann es sich beispielsweise um ein Hartlötverfahren handeln, aber auch einem sonstigen Verbindungsverfahren, wie Schweißen, Kleben, Weichlöten usw. Maßgebend ist, daß die vorläufige Verbindung der Teile den Transport zu diesem nächsten Verfahrensschritt ermöglicht, ohne daß dabei die Teile voneinander getrennt werden.According to a further embodiment of the inventive The next procedural step will be the preliminary interconnected parts a final Connection method supplied. It can be act, for example, a brazing process, but also another connection method, such as welding, gluing, Soft soldering etc. It is decisive that the provisional connection the parts transport to this next process step enables without separating the parts become.

Nach einer vorteilhaften Ausgestaltung der erfindungsgemäßen Vorrichtung nach Anspruch 6 ist die Aufweitvorrichtung als Radialverprägewerkzeug ausgebildet, mit an einem Arbeitshohlkolben angeordneten Spreizbacken, mit einer innerhalb des Arbeitshohlkolbens für die Verprägearbeit zu diesem axial verschiebbar gelagerten Zugstange und mit einem auf der radialen Innenseite der Spreizbacken angreifenden Arbeitskonus an der Zugstange.According to an advantageous embodiment of the invention Device according to claim 6 is the expanding device as Radial stamping tool designed with on one Hollow piston arranged spreading jaws, with a inside the working hollow piston for embossing this axially displaceable tie rod and with a attacking on the radial inside of the expanding jaws Working cone on the drawbar.

Nach einer diesbezüglichen weiteren vorteilhaften Ausgestaltung der Erfindung steigt der Arbeitskonus in Einfahrtrichtung des Werkzeughalters bzw. des Radialverprägewerkzeugs, wobei die Zugstange für die Verprägearbeit entgegen dieser Richtung verschoben wird. Hierdurch wird vor allem erreicht, daß beim Verprägevorgang nicht nur das Ende des Endabschnittes des Rohres aufgeweitet wird, sondern der gesamte in die Bohrung der Platte tauchende Abschnitt, wodurch eine gleichmäßige Kraftverteilung der Verbindung gewährleistet ist. Bei einer solchen vorläufigen Verbindung kommt es weniger darauf an, daß auf den Umfang der Aufweitung gesehen eine gleichmäßige Aufweitung erfolgt, sondern daß entsprechend der Spreizbackengestaltung und Umfangsverteilung eine Verbindung erzielt wird, die eine gleichmäßige Aufteilung der Haltekraft bewirkt.According to a further advantageous embodiment in this regard the invention increases the working cone in the direction of entry Tool holder or the radial embossing tool, the Drawbar for embossing work against this direction is moved. This is mainly achieved in that Embossing process not only the end of the end section of the Tube is expanded, but the entire in the hole the plunge section, creating an even Force distribution of the connection is guaranteed. At a such a preliminary connection is less important that seen on the extent of expansion a uniform Expansion takes place, but that according to the Spreading jaw design and circumferential distribution a connection is achieved, the even distribution of the holding force causes.

Nach einer weiteren vorteilhaften Ausgestaltung der erfindungsgemäßen Vorrichtung erfolgt die Betätigung der Zugstange über einen Arbeitszylinderantrieb mit der Zugstange als Kolben und dem Arbeitshohlkolben als Zylinder, welcher am Werkzeughalter befestigt ist. Da Zugstange und Arbeitshohlkolben als Arbeitseinheit mit dem Werkzeughalter bewegt werden, bringt diese Kombination von Zugstange und Arbeitshohlkolben zu einem Arbeitszylinder räumliche und auf funktionelle Vorteile.According to a further advantageous embodiment of the device according to the invention is actuated Drawbar via a working cylinder drive with the drawbar as a piston and the working hollow piston as a cylinder, which on Tool holder is attached. Because tie rod and Hollow piston as a work unit with the tool holder this combination of pull rod and Working piston to a working cylinder spatial and on functional advantages.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist die Fixiereinrichtung eine Haltevorrichtung für das Rohr auf und eine Auswerfeinrichtung zur Entnahme der verbundenen Teile. Die Fixiereinrichtung selbst ist als solche fest mit dem Maschinenrahmen verbunden und dadurch den anderen Vorrichtungen unbeweglich zugeordnet. Hierdurch ergibt sich vorteilhafterweise die Möglichkeit eine von den übrigen Vorrichtungen funktionell unabhängige Geräte, wie die Haltevorrichtung und die Auswerfeinrichtung an der Fixiereinrichtung abzulegen.According to a further advantageous embodiment of the invention the fixing device has a holding device for the tube on and an ejection device for removing the connected parts. The fixing device itself is fixed as such connected to the machine frame and thereby the assigned to other devices immobile. hereby there is advantageously the possibility of one of the other devices functionally independent devices, such as the Holding device and the ejection device on the Put down the fixing device.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Spanneinrichtung in und entgegen Richtung feststehender Fixiereinrichtung geführt, verstellbar. Hierdurch kann das in der Fixiereinrichtung gehaltene Rohr über die Spanneinrichtung mit der Platte verspannt werden, bevor über das Radialverprägewerkzeug die Verbindung zwischen den Teilen hergestellt wird, wonach die Spanneinrichtung die Platte freigibt, welche dann gemeinsam mit dem mit ihm nunmehr verbundenen Rohr von der Fixiereinrichtung entfernt wird.According to a further advantageous embodiment of the invention the clamping device is fixed in and against the direction Fixing device guided, adjustable. This can result in the Fixing device held tube with the clamping device the plate be clamped before over the Radial embossing tool the connection between the parts is produced, after which the clamping device the plate releases, which then together with him now connected pipe is removed from the fixing device.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist die Spanneinrichtung Führungsabschnitte zur Aufnahme der Platte auf, so daß nach Einlegen der Platte in die Führungsabschnitte und Einfahren der Spanneinrichtung in Richtung Fixiereinrichtung die Bohrung in der Platte exakt über das Ende des Rohres schiebbar ist, wonach dann der Verprägevorgang beginnen kann. Die Platte selbst kann eine unterschiedliche Dicke aufweisen, wobei die Führungsabschnitte beispielsweise Justierzapfen sein können, welche an einer parallel beweglichen Spannplatte der Spanneinrichtung angeordnet sein können, wobei auf diesen Justierzapfen einfache Mittel, wie beispielsweise Rundschnurringe vorhanden sein können, die als Werkstück dienende Platte in der Transportlage an der Spannplatte zu halten. Sofern es sich bei der als Werkstück dienenden Platte um einen Flansch handelt, der mit dem Rohr zu verbinden ist, so können die übrigen in einem solchen Flansch vorhandenen der späteren Verschraubung dienenden Bohrungen zur Aufnahme der Justierzapfen dienen.According to a further advantageous embodiment of the invention the clamping device has guide sections for receiving the plate so that after inserting the plate into the Guide sections and retraction of the tensioning device in The hole in the plate exactly over the direction of the fixing device the end of the tube can be pushed, after which the Embossing process can begin. The plate itself can be one have different thicknesses, the guide sections can be, for example, adjustment pins, which on a parallel movable clamping plate of the clamping device can be arranged, on this adjusting pin simple Means such as round cord rings may be present can, the plate serving as a workpiece in the transport position to hold on the clamping plate. Provided that the as Workpiece serving plate is a flange that with the pipe is to be connected, the rest can be in one such flange existing the subsequent screwing serving holes for receiving the adjusting pin.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung erfolgt die Betätigung der verschiebbaren Einrichtungen, wie Spanneinrichtung, Werkzeughalter usw. über hydraulisch oder pneumatisch angetriebene Arbeitszylinder. Über derartige Arbeitszylinder, die äußerst preiswert bereits als Normteil erhältlich sind, kann eine schnelle und präzise Steuerung der Längsbewegungen erfolgen.According to a further advantageous embodiment of the invention the sliding devices are actuated, such as Clamping device, tool holder etc. via hydraulic or pneumatically driven working cylinders. About such Working cylinder, which is extremely inexpensive as a standard part are available, can control the Longitudinal movements take place.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung erfolgen. die Wegsteuerung über Endschalter, sowie ein elektrisches Steuergerät. Derartige Endschalter werden in Großserien hergestellt und ermöglichen eine präzise Wegsteuerung, wobei das hier gegebene Herstellungsprogramm am einfachsten über ein elektrisches Steuergerät beherrschbar ist.According to a further advantageous embodiment of the invention respectively. the way control via limit switches, as well as a electrical control unit. Such limit switches are in Large series manufactured and enable a precise Path control, the manufacturing program given here easiest to control via an electronic control unit is.

Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous configurations of the Invention are the following description, the drawing and removable from the claims.

Zeichnungdrawing

Ein Ausführungsbeispiel des Gegenstandes der Erfindung ist in der Zeichnung dargestellt und im Folgenden näher beschrieben. Es zeigen:

Fig. 1
Eine Vorrichtung zur Verprägung in der Draufsicht und teilweise im Schnitt entsprechend Linie I - I in Figur 2 und
Fig. 2
die gleiche Vorrichtung in Arbeitsstellung in der Seitenansicht und dem Teilschnitt gemäß der Linie II - II in Figur 1.
An embodiment of the object of the invention is shown in the drawing and described in more detail below. Show it:
Fig. 1
A device for embossing in plan view and partly in section along line I - I in Figure 2 and
Fig. 2
the same device in the working position in the side view and the partial section along the line II - II in Figure 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Mit der in Fig. 1 und Fig. 2 gezeigten und nachfolgend beschriebenen Vorrichtung wird erreicht, daß ein dünnwandiges Rohr 1 in einer Bohrung 2 eines Anschlußteiles, wie beispielsweise eines Flansches 3, derart verprägt wird, daß auch ohne zusätzliche Halteeinrichtungen die Baulage von Flansch 3 auf Rohr 1 für den nächsten Bearbeitungsschritt, nämlich das Verlöten der beiden Teile gewährleistet ist. Hierdurch können die sonst erforderlichen zusätzlichen Verfahrensschritte eingespart werden, entweder das Halten der beiden Teile in ihrer zusammengesteckten Lage bis der Hartlötvorgang beendet wäre, oder ein Heften der beiden Teile aneinander, welches nicht nur zeitaufwendig wäre, sondern auch zu Materialauftrag bzw. Materialverformung führen könnte.With the one shown in Fig. 1 and Fig. 2 and below described device is achieved that a thin-walled Tube 1 in a bore 2 of a connector, such as for example, a flange 3, is stamped such that also the mounting position of flange 3 without additional holding devices on tube 1 for the next processing step, namely that Soldering of the two parts is guaranteed. This can the additional procedural steps otherwise required be saved, either keeping the two parts in their assembled position until the brazing process ends would be, or a stitching of the two parts together, which is not would only be time-consuming, but also for material order or Material deformation could result.

Beim erfindungsgemäßen Verfahren wird der in die Bohrung 2 des Flansches 3 eingesteckte Endabschnitt des Rohres 1 über eine entsprechende Vorrichtung aufgeweitet und dabei mit der Bohrungswand des Flansches 3 verprägt. Diese Verprägung erfolgt auf den Rohrumfang bezogen nicht vollständig, sondern nur über den größten Teil des Umfangs, wie nachfolgend anhand der Zeichnung der erfindungsgemäßen Vorrichtung beschrieben.In the method according to the invention, the hole 2 of the flange 3 inserted end portion of the tube 1 over a corresponding device expanded and thereby with the Bored wall of the flange 3 embossed. This embossment is not completely related to the pipe circumference, but only over most of the scope, as shown below the drawing of the device according to the invention described.

In Figur 1 und 2 ist eine Verprägemaschine in der Draufsicht und Seitenansicht sowie in Teilschnitten dargestellt. In Figur 1 ist die Verprägemaschine in ihrer Ausgangslage bzw. in der Lage dargestellt, die sie nach Beendigung des Verprägevorgangs und vor einem neuerlichen Verprägevorgang einnimmt. In Figur 2 ist sie in Arbeitsstellung nach dem Verprägen und um die Längsachse um 90° verdreht dargestellt.In Figures 1 and 2 is a stamping machine in plan view and side view and shown in partial sections. In Figure 1 the stamping machine is in its initial position or in the position shown, which they after the embossing process and before a new stamping process. In Figure 2 is them in working position after embossing and around the Longitudinal axis shown rotated by 90 °.

Die Verprägemaschine weist eine Halteplatte 4, mehrere Antriebszylinder 5 und eine mit diesem verbundene, parallel zur Halteplatte verschiebbare Spannplatte 6 auf, auf welcher, der Halteplatte 4 zugewandt, zwei Justierzapfen 7 angeordnet sind.The stamping machine has a holding plate 4, several Drive cylinder 5 and one connected to it, in parallel to the holding plate displaceable clamping plate 6 on which facing the holding plate 4, two adjusting pins 7 arranged are.

Zur Herstellung der Verbindung zwischen Rohr 1 und Flansch 3 werden folgende Verfahrensschritte durchgeführt: Die Spannplatte 6 wird über zwei Druckluftzylinder 19, von deneen nur einer dargestellt ist, in Richtung des Pfeiles VII parallel verschoben. Danach wird der Flansch 3 in die in Figur 1 strichpunktiert dargestellte Lage gebracht, wobei an ihm vorgesehene, später für eine Schraubverbindung dienende Flanschbohrungen 8 auf die Justierzapfen 7 gesteckt werden. In einer Ringnut am freien Endabschnitt der Justierzapfen 7 sind jeweils drei Rundschnurringe 9 angeordnet, durch die der Flansch 3 an der Spannplatte 6 halten wird.To establish the connection between pipe 1 and flange 3 the following process steps are carried out: the Clamping plate 6 is via two compressed air cylinders 19, by deneen only one is shown parallel in the direction of arrow VII postponed. Then the flange 3 is in the in Figure 1 Position shown in dash-dotted lines, being on him intended, later serving for a screw connection Flange bores 8 are placed on the adjustment pin 7. In are an annular groove on the free end portion of the adjusting pin 7 arranged three round cord rings 9 through which the Flange 3 will hold the clamping plate 6.

Als nächster Verfahrensschritt wird die Spannplatte 6 in Richtung des Pfeiles III parallel verschoben, wobei der Flansch 3 mit seiner Bohrung 2 über das freie Ende des Rohres 1 geschoben wird. Die Lage des Krümmers 11 des Rohres 1 bzw. eines an diesem Rohr vorhandenen Krümmers 11 wird vorher in Bezug auf die Lage des Flansches bzw. der Flanschbohrungen 8 justiert.As the next process step, the clamping plate 6 in Direction of arrow III moved parallel, the flange 3rd with its bore 2 over the free end of the tube 1 is pushed. The position of the elbow 11 of the tube 1 or a manifold 11 present on this pipe is previously in Regarding the position of the flange or flange bores 8 adjusted.

Unabhängig hiervon ist als weiterer Verfahrensschritt in der gleichen Verstellrichtung III bzw. V eine Verprägeeinrichtung 12 verschiebbar, mit einem Spreizbacken 13 aufweisenden Arbeitskolben 14 und einer koaxial dazu und axial verschiebbar gelagerten Zugstange 15, die auf ihrem, den Spreizbacken zugeordneten Abschnitt einen Aufweitkonus 16 hat. Die Zugstange 15 ist zudem abschnittsweise von einem Hohlkolben 23 umgeben, welcher zur Betätigung der Zustange als Arbeitszylinder und die Zugstange 15 als deren Arbeitskolben dient.Regardless of this is a further process step in the same adjustment direction III or V a stamping device 12 displaceable, with a spreading jaw 13 Working piston 14 and one coaxial with it and axially displaceable mounted tie rod 15, on her, the expanding jaws assigned section has an expansion cone 16. The Pull rod 15 is also in sections of a hollow piston 23 surrounded, which to actuate the status as Working cylinder and the pull rod 15 as their working piston serves.

Die Verprägeeinrichtung 12 ist auf einem Werkzeughalter 17 angeordnet, der in Axialrichtung des Arbeitskolbens 14 bzw. der Zugstange 15 über Arbeitszylinder 18 verschiebbar gelagert ist.The stamping device 12 is on a tool holder 17 arranged in the axial direction of the working piston 14 and the Drawbar 15 is slidably mounted on working cylinder 18.

In weiterer Durchführung des erfindungsgemäßen Verfahrens wird wie bereits oben beschrieben im ersten Arbeitsgang die Spannplatte 6 in Richtung Halteplatte entsprechend Pfeil III solange verfahren, bis der Flansch 3 für die Verprägung gesetzt ist, wonach die beiden Punkte IV in Überdeckung gelangt sind. Dieser Antrieb erfolgt über zwei Arbeitszylinder 5, von denen in der Zeichnung nur einer dargestellt ist.In further implementation of the method according to the invention As already described above, the Clamping plate 6 in the direction of the holding plate according to arrow III Proceed until the flange 3 is set for the embossing is, after which the two points IV have overlapped. This drive takes place via two working cylinders 5, of which in only one of the drawings is shown.

Im nächsten Arbeitsschritt des erfindungsgemäßen Verfahrens wird der Werkzeughalter 17 durch die Arbeitszylinder 18 angetrieben in Richtung des Pfeiles V verschoben, bis er die in Figur 2 dargestellte Arbeitslage einnimmt, in der der Arbeitskolben 14 der Verprägeeinrichtung 12 durch die zentrale Bohrung 21 der Spannplatte 6 geschoben ist, und wobei sein die Spreizbacken 13 aufweisende Teil in das Rohr 1 taucht.In the next step of the method according to the invention the tool holder 17 by the working cylinder 18th driven in the direction of arrow V until it moves in Figure 2 occupies the position shown in the Working piston 14 of the stamping device 12 through the central Bore 21 of the clamping plate 6 is pushed, and being the Part having expansion jaws 13 dips into the tube 1.

Im nächsten erfindungsgemäßen Arbeitsgang wird die Zugstange 15 mit ihrem Arbeitskonus 16 in Richtung des Pfeiles VI, also entgegen der Richtung V gezogen, wodurch aufgrund der konischen Mantelfläche des Aufweitkonus 16 die Spreizbacken 13 des Arbeitskolbens 14 radial auseinandergedrückt werden und dabei das dünnwandige Rohr 1 an die Wand der Bohrung 2 des Flansches 3 pressen, wodurch eine Materialverprägung zwischen Rohr 1 und Flansch 3 stattfindet. Diese Arbeitsstellung nach dem Verprägevorgang ist in Figur 2 dargestellt. In the next operation according to the invention, the pull rod 15 with their working cone 16 in the direction of arrow VI, that is pulled against the direction V, which due to the conical outer surface of the expanding cone 16, the expanding jaws 13 of the working piston 14 are pushed apart radially and thereby the thin-walled tube 1 to the wall of the bore 2 of the flange 3 press, thereby embossing the material between tube 1 and flange 3 takes place. This working position after the embossing process is shown in Figure 2.

Um das Rohr 1 und den mit diesem verprägten Flansch 3 der Verprägemaschine entnehmen zu können, wird als erstes die Zugstange 15 entgegen Richtung VI zurückgeschoben, so daß die Spreizbacken 13 durch Rundschnurringe 22 belastet, in ihre Ursprungslage radial zurückgehen, wonach nacheinander zuerst der Werkzeughalter 17 und danach die Spannplatte 6 in die in Figur 1 dargestellte Ausgangslage zurückgefahren werden.Around the tube 1 and the flange 3 embossed with it To be able to remove embossing machine, the first is Pull rod 15 pushed back towards VI so that the Spreading jaws 13 loaded by round cord rings 22 in their Radially decrease from the original position, then successively first the tool holder 17 and then the clamping plate 6 in the in Figure 1 shown starting position can be reduced.

Nach diesem Verprägevorgang können die nunmehr Rohr 1 und Flansch 3, die vorläufig miteinander verbunden sind, aus der in Fig. 1 dargestellten Lage entnommen und dem Lötofen zugeführt werden, ohne daß deshalb eine zusätzliche Fixierung der beiden Teile zueinander erforderlich ist.After this stamping process, the tube 1 and Flange 3, which are temporarily interconnected, from the in Fig. 1 shown location removed and fed to the soldering furnace be without an additional fixation of the two Parts to each other is required.

Claims (14)

  1. Method for the connection of a pipe end and a plate providing a hole to accommodate the pipe end or the like upon adoption of a specific positional configuration of pipe and plates, characterised by the following process steps:
    fixing of the pipe with projecting pipe end
    attachment of the plate with its hole onto the free pipe end
    radial expansion at least of sections of the pipe end with equilateral stamping of the material of pipe and plate or of the pipe end outside surface and internal wall of the plate hole
    thereby establishment of a temporary positive and frictionally engaged connection between pipe end and plate, and
    feeding of the parts linked by the temporary positive and frictionally engaged method to a final connection method (soldering, welding, bonding)
  2. Method according to claim 1, characterised in that the expansion is produced by inserting an expansion device from the free side of the pipe end.
  3. Method according to claim 1 or 2, characterised in that both pipe and plate are braced together before the expansion of the pipe end.
  4. Method according to one of the preceding claims, characterised in that the expansion is produced without additional effect of temperature.
  5. Method according to one of the preceding claims, characterised in that, as the next process step, the parts temporarily connected together are forwarded to a final connection method.
  6. Device for carrying out the method according to one of claims 1 to 5, characterised in that,
    a fixing device (4) and a tensioning device (6) are present, between which the end of the pipe (1) and the plate (3) can be held in a position where they are configured in relation to one another,
    a tool clamp (17) is present which can be slid in axis direction II of the pipe end (1),
    an expansion device (12) is present which is supported by the tool clamp (17) and can be inserted into the pipe hole and
    a machine frame is present, on which the fixing device (4), tensioning device (6) and tool clamp (17) are mounted.
  7. Device according to claim 6, characterised in that the expansion device is configured as a radial stamping tool (12), with expansion jaws (13) arranged on a main piston (14), with a drawbar (15) mounted inside the main piston (14) and axially movable (VI) to it for the stamping work and with a working cone (16) on the drawbar (15), which acts on the radial interior of the expansion jaws (13).
  8. Device according to claim 7, characterised in that the working cone (16) rises in the entry direction (V) of the tool clamp (17) or the radial stamping tool (12) and in that the drawbar (15) is moved against this direction for the stamping work.
  9. Device according to claim 7 or 8, characterised in that the drawbar (15) is activated by means of a working cylinder drive with the drawbar (15) as a piston and a hollow cylinder (14) linked to the tool clamp (17) as a working cylinder.
  10. Device according to one of claims 6 to 9, characterised in that the fixing device (4) provides a holding device for the pipe (1) and an ejection device for withdrawal of the connected parts (1, 3).
  11. Device according to one of claims 6 to 10, characterised in that the tensioning device (6) can be controllably adjusted in and against the direction (III) of the stationary fixing device (4).
  12. Device according to claim 11, characterised in that the tensioning device (6) provides guide sections (7) to accommodate the plate (3), so that after insertion of the plate (3) into the guide sections and the approach of the tensioning device (6) in the direction (III) of the fixing device (4), the hole (2) in the plate (3) can be slid precisely over the end of the pipe (1).
  13. Device according to one of claims 6 to 12, characterised in that the adjustable devices, such as the tensioning device (6), tool clamp (17) etc., are activated by means of hydraulically or pneumatically driven working cylinders (5, 18, 19, 22).
  14. Device according to one of claims 6 to 13, characterised in that the direction is controlled by means of a limit switch and an electrical control device.
EP99100560A 1998-01-14 1999-01-13 Method for the connection of pipes and device for carrying out the same Expired - Lifetime EP0930479B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800910A DE19800910A1 (en) 1998-01-14 1998-01-14 Pipe connection method and device for carrying it out
DE19800910 1998-01-14

Publications (3)

Publication Number Publication Date
EP0930479A2 EP0930479A2 (en) 1999-07-21
EP0930479A3 EP0930479A3 (en) 2000-07-05
EP0930479B1 true EP0930479B1 (en) 2003-04-09

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ID=7854446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100560A Expired - Lifetime EP0930479B1 (en) 1998-01-14 1999-01-13 Method for the connection of pipes and device for carrying out the same

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EP (1) EP0930479B1 (en)
AT (1) ATE237114T1 (en)
DE (1) DE19800910A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945085A1 (en) * 1979-11-08 1981-05-21 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach METHOD AND DEVICES FOR ROLLING IN TUBES COATED ON THE INSIDE
JPS57500686A (en) * 1980-05-27 1982-04-22
FI70080C (en) * 1984-06-18 1986-09-12 Goeran Sundholm FOERBINDNING FOER ROER MED KRAGAD AENDE
DE3545554A1 (en) * 1985-12-21 1987-07-02 Sueddeutsche Kuehler Behr Tube base connection for heat exchanger - uses sleeve with collar in tube ends
DE3724675A1 (en) * 1987-07-25 1989-02-02 Heraeus Elektroden Heat exchanger
DE4127498A1 (en) * 1991-08-20 1993-02-25 Dietzel Hydraulik Gmbh & Co Kg Pipe connection using cutting ring - has inner circumferential groove holding widened end of pipe
DE4306496A1 (en) * 1993-03-03 1994-06-01 Zeuna Staerker Kg Method of mfg. fine section with fixed flange(s) - inserts flange ring on pipe section blank and widens pipe section end after ring positioning
DE19501780C2 (en) * 1994-01-21 1997-08-07 Leistritz Abgastech Pipe-flange connection

Also Published As

Publication number Publication date
EP0930479A2 (en) 1999-07-21
EP0930479A3 (en) 2000-07-05
ATE237114T1 (en) 2003-04-15
DE19800910A1 (en) 1999-07-15

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