DE129875C - - Google Patents

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Publication number
DE129875C
DE129875C DENDAT129875D DE129875DA DE129875C DE 129875 C DE129875 C DE 129875C DE NDAT129875 D DENDAT129875 D DE NDAT129875D DE 129875D A DE129875D A DE 129875DA DE 129875 C DE129875 C DE 129875C
Authority
DE
Germany
Prior art keywords
mandrel
pipe
tube
tubes
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.)
Active
Application number
DENDAT129875D
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German (de)
Publication of DE129875C publication Critical patent/DE129875C/de
Active legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06Manufacture 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
    • B21C37/15Making tubes of special shape; Making tube fittings
    • B21C37/16Making tubes with varying diameter in longitudinal direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Erfindung betrifft die Herstellung nahtloser Metallrohre, die an verschiedenen Stellen verschiedene innere oder äufsere Weite haben können. Es kommen also vor allem aufsen cylindrische Rohre mit veränderlichen Innenquerschnitten in der Längsrichtung in Betracht.The invention relates to the manufacture of seamless metal tubes, which are in various places can have different inner or outer widths. So it comes mainly outside cylindrical tubes with variable internal cross-sections in the longitudinal direction into consideration.

Das Verfahren besteht darin, das Rohr zugleich mit einem Dorn in seinem Innern durch eine Matrize zu ziehen, worauf das Rohr mit dem von ihm fest umschlossenen Dorn einem Querwalzverfahren unterworfen wird; hierbei wird das Rohr auf dem Dorn ein wenig aufgeweitet, so dafs es sich ohne Widerstand vom Dorne entfernen läfst.The procedure consists in going through the pipe with a mandrel inside to pull a die, whereupon the pipe with the mandrel firmly enclosed by it a Is subjected to cross rolling process; here the pipe is widened a little on the mandrel, so that it can be removed from the mandrel without resistance.

In Fig. ι bis 3 ist die Herstellung eines Rohres gezeigt, dessen Enden stärkere Wandung haben als die mittleren Theile des Rohres. Zur Herstellung eines solchen Rohres wird ein Dorn wie der in diesen Figuren gezeigte benutzt, der einen mittleren Theil / besitzt, dessen Durchmesser gleich ist dem gröfsten inneren Durchmesser des fertigen Rohres. Die Enden η des Domes sind enger als die mittleren Theile, ihre Durchmesser sind gleich dem des kleinsten inneren Durchmessers des fertigen Rohres. Diese Enden sind mit dem gröfseren mittleren Theil des Dornes durch konische Theile 0 vereinigt.In Fig. 1 to 3 the production of a pipe is shown, the ends of which have thicker walls than the central parts of the pipe. To make such a pipe, a mandrel such as that shown in these figures is used which has a central portion / the diameter of which is equal to the largest inner diameter of the finished pipe. The ends η of the dome are narrower than the central parts; their diameters are equal to that of the smallest inner diameter of the finished tube. These ends are combined with the gröfseren middle part of the mandrel through conical part 0th

Das auszuziehende Rohr w hat am besten einen inneren Durchmesser, der gleich ist dem der mittleren Theile I des Dornes und sollte am besten so weit oder weiter sein als der weiteste Theil des fertigen Rohres. Ein Ende des Rohres, wie in n>, ist zusammengezogen, um so auf das schmale Ende des Dornes zu passen und durch die Oeffnung der Matrize Z frei hindurchzugehen.The tube w to be extracted is best of an internal diameter equal to that of the central part I of the mandrel, and should best be as wide or wider than the largest part of the finished tube. One end of the tube, as in n>, is pulled together so as to fit onto the narrow end of the mandrel and pass freely through the opening of the die Z.

Dieses verengte Ende des Rohres wird durch Zangen u. s. w. gegriffen, wenn das Rohr gezogen wird. Wie es Fig. 3 zeigt, umfafst das Rohr, nachdem es durch die Matrize gegangen ist, den Dorn in seinem Innern; die Enden des Rohres umgeben die verengten Theile des Dornes, da ihre Wandungen stärker sind als die mittleren Theile des Rohres, welche die gröfseren mittleren Theile des Dornes umfassen. This narrowed end of the pipe is grasped by pliers and the like when the pipe is pulled will. As shown in Fig. 3, the tube encompasses after it has passed through the die is the thorn within; the ends of the tube surround the narrowed parts of the Dornes, since its walls are stronger than the central parts of the tube, which the encompass larger central parts of the thorn.

Unter dieser Bedingung wäre es unmöglich, den Dorn aus dem Innern des Rohres herauszuziehen ohne ein besonderes Verfahren, ihn loszumachen, da der mittlere Theil des Dornes gröfsere Durchmesser hat als die inneren Durchmesser des Endes des Rohres. Um dieses Herausziehen des Dornes vorzunehmen, wird das Rohr einem Querwalzprocefs unterworfen, wodurch der Contact mit dem Dorn an allen Punkten gelöst wird und die Enden genügend erweitert werden, um zu gestatten, dafs der Dorn herausgezogen wird.Under this condition it would be impossible to withdraw the mandrel from inside the tube without any particular method of loosening it, as the middle part of the thorn has a larger diameter than the inner diameter of the end of the pipe. To this To pull out the mandrel, the tube is subjected to a cross rolling process, whereby the contact with the spike is loosened at all points and the ends are sufficient extended to allow the mandrel to be withdrawn.

Der Querwalzprocefs kann dem Rohr etwas unregelmäfsige Gestalt lassen und das Rohr kann im äufseren Durchmesser etwas variiren, und um diese Unregelmäfsigkeiten zu entfernen, läfst man es nochmals durch die Matrize gehen, ohne einen inneren Dorn zu benutzen, wodurch ein gleichmäfsiger äufserer Durchmesser erhalten wird; die Rohre sind aufsen cylindrisch und die Innenquerschnitte können verschiedene sein.The cross-rolling process can give the pipe a somewhat irregular shape and the pipe can vary somewhat in the outer diameter, and in order to remove these irregularities, if you let it go through the die again without using an inner mandrel, which means a uniform outer diameter is obtained; the tubes are cylindrical on the outside and the internal cross-sections can be different.

In Fig. 4 ist eine andere Gestalt des Domes und Rohres gezeigt, welch letzteres durch das vorliegende Verfahren hergestellt wird. In diesem Falle ist das Rohr dicker in der Mitte als an den Enden und der Dorn kann an der Linie Y in zwei Hälften getheilt werden, um die Nothwendigkeit, mehr quer zu walzen als nöthig ist, zu vermeiden, um dem Reibungscontact des Rohres am Dorn abzuhelfen. Die Enden der Dornabtheilungen können an diesem Punkte Y zusammenstofsen oder eine Abtheilung kann in die andere geschraubt werden, wie es gezeigt ist, oder sie können in irgend einer anderen geeigneten Weise vereinigt sein.In Fig. 4 there is shown another shape of the dome and tube, the latter being made by the present process. In this case the tube is thicker in the middle than at the ends, and the mandrel can be divided into two halves on the line Y, in order to avoid the need to roll more transversely than is necessary in order to avoid the frictional contact of the pipe with the mandrel to remedy. The ends of the mandrel sections can be butted together at this point Y or one section can be screwed into the other as shown, or they can be united in any other suitable manner.

Claims (1)

Pate nt-An spruch:
Verfahren zum Ziehen nahtloser Metallröhren, welche aufsen von gleichem Durchmesser und innen . von verschiedenem Durchmesser sind, dadurch gekennzeichnet, dafs ein Hohlblock, aus dem die Röhren herzustellen sind, über einen den Wandstärken des anzufertigenden Rohres entsprechend längsprofilirten Dorn gezogen wird, bis das gezogene Rohr fest an dem Dorn anliegt, dafs danach das Rohr in bekannter Weise durch Aufwalzen erweitert und von dem Dorn abgeschoben wird und dafs schliefslich das Rohr ohne Dorn nochmals durch eine Matrize gezogen wird.
Sponsorship claim:
Method of drawing seamless metal tubes which are of the same diameter on the outside and inside. are of different diameters, characterized in that a hollow block from which the tubes are to be made is drawn over a mandrel with a longitudinal profile corresponding to the wall thicknesses of the pipe to be made, until the drawn pipe rests firmly on the mandrel, after which the pipe is passed through in a known manner Rolling is expanded and pushed off the mandrel and that finally the tube is pulled again through a die without the mandrel.
Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DENDAT129875D Active DE129875C (en)

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DE (1) DE129875C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914088C (en) * 1944-04-05 1954-06-24 Rheinische Roehrenwerke Ag Method for producing cam-shaped elevations on hollow bodies
DE922161C (en) * 1950-04-07 1955-01-10 Rheinische Roehrenwerke A G Method and device for the production of pipes with inwardly thickened ends
FR2350153A1 (en) * 1976-05-03 1977-12-02 Caterpillar Tractor Co PROCESS FOR FORMING A BUSHING HAVING A PROFILED OPENING, ESPECIALLY FOR A BEARING CHAIN LINK
DE2741071A1 (en) * 1976-10-29 1978-05-11 Tubes Cie Indle Cale METHOD OF MANUFACTURING A TUBE BODY AND TUBE BODY WITH DIFFERENT DIAMETERS AND THICKNESSES OVER ITS LENGTH
EP0014474A1 (en) * 1979-02-09 1980-08-20 Vereinigte Metallwerke Ranshofen-Berndorf AG Method for the production of a tube
EP0086480A2 (en) * 1982-02-15 1983-08-24 Isao Kimura Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material
US4726211A (en) * 1984-04-16 1988-02-23 Sanwa Kokan Kabushiki Kaishas Method of cold drawing seamless metal tubes each having an upset portion on each end
US5119662A (en) * 1984-04-16 1992-06-09 Sanwa Kokan Co., Ltd. Methods for cold drawing seamless metal tubes each having an upset portion on each end
EP1190784A2 (en) * 2000-09-23 2002-03-27 Reiche GmbH & Co. KG Automotive Components Method for producing a tube with partially different wall thickness

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914088C (en) * 1944-04-05 1954-06-24 Rheinische Roehrenwerke Ag Method for producing cam-shaped elevations on hollow bodies
DE922161C (en) * 1950-04-07 1955-01-10 Rheinische Roehrenwerke A G Method and device for the production of pipes with inwardly thickened ends
FR2350153A1 (en) * 1976-05-03 1977-12-02 Caterpillar Tractor Co PROCESS FOR FORMING A BUSHING HAVING A PROFILED OPENING, ESPECIALLY FOR A BEARING CHAIN LINK
DE2741071A1 (en) * 1976-10-29 1978-05-11 Tubes Cie Indle Cale METHOD OF MANUFACTURING A TUBE BODY AND TUBE BODY WITH DIFFERENT DIAMETERS AND THICKNESSES OVER ITS LENGTH
EP0014474A1 (en) * 1979-02-09 1980-08-20 Vereinigte Metallwerke Ranshofen-Berndorf AG Method for the production of a tube
EP0086480A2 (en) * 1982-02-15 1983-08-24 Isao Kimura Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material
EP0086480A3 (en) * 1982-02-15 1984-03-21 Isao Kimura Method for the manufacture of front fork of single unit type for bicycles from center butted ferrous tubular material
US4726211A (en) * 1984-04-16 1988-02-23 Sanwa Kokan Kabushiki Kaishas Method of cold drawing seamless metal tubes each having an upset portion on each end
US5119662A (en) * 1984-04-16 1992-06-09 Sanwa Kokan Co., Ltd. Methods for cold drawing seamless metal tubes each having an upset portion on each end
EP1190784A2 (en) * 2000-09-23 2002-03-27 Reiche GmbH & Co. KG Automotive Components Method for producing a tube with partially different wall thickness
EP1190784A3 (en) * 2000-09-23 2003-11-19 Reiche GmbH & Co. KG Automotive Components Method for producing a tube with partially different wall thickness

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