DE1072581B

DE1072581B -

Info

Publication number: DE1072581B
Application number: DENDAT1072581D
Authority: DE
Publication date: 1960-01-07

Description

DEUTSCHESGERMAN

Die Erfindung bezieht sich auf eine Vorrichtung zum Aushalsen von Anschlußstutzen an einem waagerecht gelagerten Sammelrohr oder Kessel, deren den Aushalsstempel antreibendes Hubwerk im Innern des Sammelrohres mittels eines rohrförmigen Tragarmes in Stellung gebracht wird, und die mit einer Umlaufkühlung für den Stempel ausgestattet ist.The invention relates to a device for necking out connecting pieces on a horizontal stored collecting pipe or boiler, whose lifting mechanism driving the necking punch inside the Collecting tube is brought into position by means of a tubular support arm, and with a circulation cooling system is equipped for the stamp.

Die Zu- und Rückleitung für das Kühlmittel sind bei einer solchen Vorrichtung zusammen mit je einer Druckmittelzu- und -ableitung sowie mit Leitungen für Heizgas usw. im Innern des Tragarmes angeordnet. Da zur Herstellung der Anschlußstutzen bestimmte Bereiche des Sammelrohres oder Kessels erhitzt werden, befindet sich das Hubwerk und dessen Tragarm, die im Innern des Sammelrohres angebracht sind, in einer Atmosphäre erhöhter Temperatur. Die Folge davon ist, daß der Tragarm sich ausdehnt, und zwar im allgemeinen mehr als der Maschinenrahmen, der die mit dem Stempel zusammenarbeitende Außenmatrize trägt. Infolgedessen ist die Stempelachse dann nicht mehr auf die Achse der Außenmatrize ausgerichtet, und es ist erforderlich, einen erneuten Einstellvorgang einzuschalten, der den Arbeitsgang des Stempels verzögert, zumal bei solchen Vorrichtungen gewöhnlich mehrere an einem einzigen Sammelrohr oder Kessel anzubringende Anschlußstutzen schrittweise nacheinander ausgehalst werden. Diese Wärmedehnungen werden übrigens in dem Maße größer, in welchem der Tragarm des Hubwerkes in das erhitzte Sammelrohr eingeschoben wird und rufen nicht nur eine lineare Versetzung des Hubwerkes selbst hervor, sondern auch Verkantungen des Hubwerks gegenüber ■dem Sammelrohr bzw. Verdrehungen des Tragarmes des Hubwerkes. Diese Wärmedehnungen und Verkantungen sind besonders dann sehr störend, und das Einstellen wird besonders dann sehr schwierig, wenn das zu bearbeitende Sammelrohr sehr eng ist und die Vorrichtung mit nur geringem Spielraum in dem Sammelrohr verschiebbar angeordnet ist. Die Erfindung bezweckt daher eine Lösung der Aufgabe, diese Schwierigkeiten beim Aushalsen von Anschlußstutzen in einer Vorrichtung der eingangs genannten Art zu vermeiden und eine Vorrichtung zu schaffen, mit deren Hilfe Anschlußstutzen an Sammelrohren oder Kesseln schneller und dabei mit größerer Genauigkeit hergestellt werden können.The supply and return lines for the coolant are in such a device together with one Pressure medium supply and discharge as well as lines for heating gas etc. arranged inside the support arm. Because certain areas of the manifold or boiler are heated for the production of the connecting piece are located, the hoist and its support arm, which are attached to the inside of the manifold are in an atmosphere of elevated temperature. The consequence of this is that the support arm expands, and in general more than the machine frame, the outer die that works together with the punch wearing. As a result, the punch axis is no longer aligned with the axis of the outer die, and it is necessary to start a new adjustment process, which stops the operation of the Stamp delayed, especially since with such devices usually several on a single manifold or boiler to be attached connecting pieces are cut out step by step one after the other. This thermal expansion Incidentally, the greater the extent to which the support arm of the hoist moves into the heated Manifold is pushed in and not only cause a linear displacement of the hoist itself, but also tilting of the hoist against ■ the collecting pipe or twisting of the support arm of the hoist. These thermal expansions and canting are particularly annoying and the setting becomes very difficult especially when the manifold to be machined is very narrow and the device is arranged displaceably with only a small margin in the collecting tube. The invention therefore aims to solve the problem Difficulties in necking out connecting pieces in a device of the type mentioned avoid and create a device with the help of connecting pieces on manifolds or boilers can be produced faster and with greater accuracy.

Auf einem anderen Gebiete der Technik, nämlich beim Kaltziehen von Rohren oder anderen Profilen, ist es bekannt, sowohl das Mundstück als auch den Dorn des Ziehwerkzeuges, die infolge der Reibung übermäßig erwärmt werden, zu kühlen. Die Kühlung ries Mundstückes läßt sich dabei in einfacher Weise bewerkstelligen, jedoch bereitet die Kühlung des Domes größere Schwierigkeiten, da diese Ziehdorne VorrichtungIn another field of technology, namely in the cold drawing of pipes or other profiles, it is known, both the mouthpiece and the mandrel of the drawing tool, as a result of the friction be excessively heated to cool. The cooling of the giant mouthpiece can be done in a simple manner accomplish, however, the cooling of the dome is more difficult because this mandrel contraption

zum Aushalsen von Anschlußstutzen
an einem Sammelrohr oder Kesselfor necking out connecting pieces
on a collecting pipe or boiler

Anmelder:
Andre Huet_f ParisApplicant:
Andre Huet _f Paris

Vertreter: Dr. W. Schalk und Dipl.-Ing. P. Wirth,Representative: Dr. W. Schalk and Dipl.-Ing. P. Wirth,

Patentanwälte,
Frankfurt/M., Große Eschenheimer Str. 39Patent attorneys,
Frankfurt / M., Große Eschenheimer Str. 39

Beanspruchte Priorität:
Frankreich vom 10. Mai 1955Claimed priority:
France 10 May 1955

auf Tragarmen, die ins Innere des gezogenen Rohres oder Profils eingreifen, gehalten sind. Es sind-nun Kühlvorrichtungen für Ziehdorne bekanntgeworden, bei denen die Tragarme der Dorne selbst als Zuleitung für das Kühlmittel oder für ein Schmiermittel verwendet werden. Zur Einsparung einer Rückleitung kann dabei das zu verformende Rohr selbst als Rück' leitung des Kühlmittels verwendet werden. Eine Kühlung des Tragarmes selbst ist dabei in diesem An-Wendungsgebiet nicht erforderlich, da sie genügend stabil ausgebildet und keinerlei Wärmedehnungen und Wärmespannungen ausgesetzt sind, zumal das gezogene Rohr oder sonstige Profile gegebenenfalls von ' außen oder durch die Kühlmittelrückleitung selbst gekühlt wird.are held on support arms that engage inside the drawn tube or profile. There are-well Cooling devices for mandrels become known, in which the support arms of the mandrels themselves as a supply line can be used for the coolant or for a lubricant. To save a return line the pipe to be deformed can itself be used as a return line for the coolant. A cooling the support arm itself is not required in this application area because it is sufficient stable and not exposed to any thermal expansion or stress, especially since the drawn one Tube or other profiles, if necessary, cooled from the outside or through the coolant return line itself will.

Ganz andere Verhältnisse liegen jedoch bei einer Vorrichtung der eingangs genannten Art vor, bei der das zu bearbeitende Rohr in bestimmten Bereichen, d. h. nicht einmal gleichmäßig, erhitzt wird.However, completely different conditions exist in a device of the type mentioned at the outset, in which the pipe to be processed in certain areas, d. H. not even heated evenly.

Ungenauigkeiten an fertiggestellten Rohrstutzen sind, wie festgestellt wurde, auf eine Beeinflussung des Werkzeugträgers, d. h. des das Hubwerk tragenden Tragarmes durch das zu bearbeitende Sammelrohr zurückzuführen, und die Erfindung löst die damit zusammenhängende obengenannte Aufgabe dadurch, daß der obere Bereich des Tragarmes von innen mit aus Düsen ausgesprühter Flüssigkeit gekühlt ist, die sich gemeinsam mit der vom Stempel zurückgeleiteten Kühlflüssigkeit im unteren Bereich des Tragarmes, derInaccuracies in finished pipe sockets are, as has been determined, an influence on the Tool carrier, d. H. of the support arm carrying the hoist through the collecting pipe to be processed attributed, and the invention achieves the related above-mentioned object in that the upper area of the support arm is cooled from the inside with liquid sprayed from nozzles, which is together with the cooling liquid returned from the stamp in the lower area of the support arm, the

909708/105909708/105

Claims

is designed as a trough, collects to the drain. In this way, the heating of the collecting tube particularly influenced and located in the same direction as the working ram area of the support arm as well as the area opposite this kept at a practically constant temperature. Of the As a result, the support arm itself is not exposed to any thermal expansions or thermal stresses otherwise it could cause its undesired deformation.

The object of the invention is therefore only such a cooling arrangement in the support arm of the hoist a device of the type mentioned, in which the ram of the lifting mechanism with a circulation cooling is provided. On the cooling of mandrels, which may be tubular can be and are provided with a flow cooling, the invention is not applicable accordingly.

An embodiment of the invention is described below by way of example with reference to the drawings.

The drawing shows a section of a collecting pipe, inside which the lifting mechanism and a support arm for the hoist is arranged with a cooling device according to the invention.

In the interior of the manifold a, on which a number of connection trim, z. If, for example, one is to be produced at point b at which a preliminary opening has been made in the wall, a lifting mechanism c is introduced which carries a stamp d. The lifting mechanism c is integrally connected to the support arm f . In the interior of the support arm (not shown) inlet and outlet lines for the pressure medium for actuating the lifting mechanism and lines for heating gas feeding a burner are arranged.

The punch d for producing the connecting piece works together with an outer die ο which rests against the wall of the collecting tube α around the opening b and which is carried by the machine frame p .

It is essential that the axis xx of the punch runs exactly in line with the axis yy of the die so that a precise connection piece is obtained.

Meanwhile, the support arm f for the lifting mechanism c, which is located inside the collecting tube a in an atmosphere of high temperature, could experience different thermal expansions, due to which the axis xx of the hoist with respect to the axis yy of the die is not the same Frame p, which is subject to thermal expansion, would be offset.

In order to maintain the coincidence of the two axes, a cooling device is provided which ensures that a practically constant temperature of the support arm f is maintained.

For this purpose, a feed pipe g feeds nozzles h which atomize water via the upper generating end of the tubular support arm f. Another supply pipe q leads to a container i, which surrounds the head of the punch d at the upper part of the lifting mechanism. An overflow k leads this cooling water for the punch d through a line / to the interior of the support arm / back. The ends of the support arm / are closed by means of plates m in such a way that a kind of trough is formed in the vicinity of its lower generatrix.

becomes, in which the cooling water collects at η before it is discharged through a drain opening r. As can be seen, the cooling device according to the invention not only cools the support arm / and the lifting mechanism, which are kept at a practically constant temperature, but also ensures even cooling on the upper and lower halves of the support arm /. This avoids the unequal.-Influences of thermal expansion on this support arm and thus its bending or other deformation, which it could otherwise experience and which would cause the axis xx to incline or this axis to be displaced. Due to the use of the cooling device, however, the axis xx always remains perpendicular to the axis of the collecting tube, which is a necessary condition for the production of an accurate connection piece. ,;.,:.

Claim:

Device for necking out connecting pieces on a horizontally mounted collecting pipe or tank, the lifting mechanism of which driving the necking ram is brought into position inside the collecting pipe by means of a tubular support arm and which is equipped with a circulation cooling system for the ram, characterized in that the upper area of the Support arm (/) is cooled from the inside with liquid sprayed from nozzles (fe), which collects together with the cooling liquid returned from the stamp (d) in the lower area of the support arm, which is designed as a trough, to the drain.

Considered publications:
German Patent Nos. 329 415, 698 689;
British Patent No. 140,511;
U.S. Patent No. 1,996,838.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings