DE3021481A1 - Thickened wall section tube prodn. - involves dia. reduction against inner core with subsequent widening against outer support - Google Patents

Thickened wall section tube prodn. - involves dia. reduction against inner core with subsequent widening against outer support

Info

Publication number
DE3021481A1
DE3021481A1 DE19803021481 DE3021481A DE3021481A1 DE 3021481 A1 DE3021481 A1 DE 3021481A1 DE 19803021481 DE19803021481 DE 19803021481 DE 3021481 A DE3021481 A DE 3021481A DE 3021481 A1 DE3021481 A1 DE 3021481A1
Authority
DE
Germany
Prior art keywords
outer diameter
diameter
thickening
corresponds
stopper
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.)
Granted
Application number
DE19803021481
Other languages
German (de)
Other versions
DE3021481C2 (en
Inventor
Manfred Dr.-Ing. 4150 Krefeld Janßen
Volker Dr.-Ing. 4336 Mülheim Schmidt
Eberhard 5900 Holzhausen Schultz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to DE19803021481 priority Critical patent/DE3021481C2/en
Publication of DE3021481A1 publication Critical patent/DE3021481A1/en
Application granted granted Critical
Publication of DE3021481C2 publication Critical patent/DE3021481C2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal 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
    • B21C1/22—Metal 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
    • B21C1/24—Metal 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

The equipment producing tubes with thickened wall sections consists of a drawing ring (2) working together with a mandrel (6) having plug sections (3,4,5) with different dias.I In the initial operation a tube (1) is drawn with an OD corresponding to the ID of the shoulder (7) of the drawing ring (2) while the ID is determined by the plug (3). In a subsequent operation the mandrel (6) is withdrawn from the ring until the plug section (5) is placed against the shoulder (7) of the ring (2). During the drawing movement of the tube (1) a reduction of the OD of the tube is produced by the shoulder (7) while the OD of the plug section (5) acts as an inner support.

Description

Die Erfindung betrifft ein Verfahren zur HerstellungThe invention relates to a method of manufacture

von Rohren mit örtlicher, am Umfang vorgesehener Wandverdickung und gleichmäßigem Innendurchmesser durch Ziehen und eine Ziehvorrichtung zur Durchführung des Verfahrens.of pipes with local wall thickening provided on the circumference and uniform inside diameter by pulling and a pulling device for implementation of the procedure.

Es ist bekannt, zur Erzielung von örtlichen Wandverdickungen Ziehwerkzeuge mit beweglichen Stopfen einzusetzen (DE-OS 28 39 169 und DE-PS 440 430).It is known to use drawing tools to achieve local wall thickening to use with movable stopper (DE-OS 28 39 169 and DE-PS 440 430).

Mit den bekannten Verfahren ist jedoch die kontinuierliche Herstellung von Rohren mit definierten Wanddicken sowohl in den Abschnitten mit verdickter Wand und in der Normalwand bei gleichbleibenden Übergängen und durchgehendem Innendurchmesser nicht oder nur in einzelnen voneinander unabhängigen Verfahrensschritten möglich.With the known processes, however, is the continuous production of pipes with defined wall thicknesses both in the sections with a thickened wall and in the normal wall with constant transitions and continuous inside diameter not possible or only possible in individual process steps that are independent of one another.

Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung von Rohren mit unterschiedlicher definierter Wanddicke und übergängen bei gleichbleibendem Innendurchmesser mit doppelter Innen- und Außenabstützung in einem kontinuierlichen Ziehvorgang zu schaffen, mit dem Außenverdickungen an einem Rohr in definiertem Durchmesser und Abstand klar abgegrenzten Ubergängen bei einem durchgehenden gleichmäßigen Innendurchmesser erzeugt werden.The object of the invention is to provide a method for producing pipes with different defined wall thicknesses and transitions with constant Inside diameter with double inside and outside support in one continuous To create the drawing process, with the external thickenings on a pipe in defined Diameter and distance clearly defined transitions with a continuous uniform Inside diameter can be generated.

Zur Lösung dieser Aufgabe wird ein Verfahren und eine Vorrichtung vorgeschlagen, wie es in den Patentansprüchen beschrieben ist.A method and a device are used to solve this problem proposed as described in the claims.

Mit dem erfindungsgemäßen Verfahren ist eine Erzeugung von Vormaterial für Werkstücke, z.B.The method according to the invention is used to produce primary material for workpieces, e.g.

Konstruktionsrohre und Wellen möglich, die bisher aus Vollmaterial oder durch zerspanende Bearbeitung hergestellt wurden.Construction tubes and shafts possible that were previously made of solid material or by machining.

Als Ausgangsmaterial können nahtlose und geschweißte Rohrluppen Verwendung finden.Seamless and welded tube blanks can be used as the starting material Find.

In der beigefügten Zeichnung ist eine mögliche Anordnung einer erfindungsgemäßen Ziehanlage schematisch dargestellt.In the accompanying drawing is a possible arrangement of an inventive Drawing system shown schematically.

Es zeigen: Figur 1 den Beginn des Ziehvorganges Figur 2 das Ziehteil einer Vorrichtung mit in vorgeschobener Stellung befindlichem Ziehdorn.They show: FIG. 1 the beginning of the drawing process, FIG. 2 the drawn part a device with a mandrel in the advanced position.

In diesen Zeichnungen ist das Rohr 1 mit unterschiedlichen Wanddicken dargestellt, die mit Hilfe der mit abgesetzten Ziehholen 7 und 8, welche einen unterschiedlichen Durchmesser aufweisen, ausgestatteten Ziehring 2 und eine mit mehreren Stopfen 3,4 und 5 versehene Dornstange hergestellt worden sind.In these drawings the pipe 1 is of different wall thicknesses shown, with the help of the remote pulling holes 7 and 8, which have a different Have diameter, equipped draw ring 2 and one with a plurality of stoppers 3, 4 and 5 provided mandrel bars have been made.

Bei Beginn des Ziehens wird zunächst der Rohranfang mit Hilfe des Stopfens 4 im Ziehhol 7 ein Rohrteil mit definierter Innen- und Außenwand gezogen. Zur Erzielung der Wandverdickungen wird die Dornstange 6 soweit in Ziehrichtung vorgeschoben, daß eine nach innen gerichtete definierte Wandverdickung zwischen Stopfen 5 und Ziehhol 7 entsteht. Im weiteren Verlauf des Ziehens wird die nach innen gerichtete Wandverdickung durch den als Umkehrdorn wirkenden Stopfen 4 nach außen bis an das Ziehhol 8 gedrückt.When you start pulling, the beginning of the pipe is first opened using the Plug 4 drawn in the draw hole 7, a pipe part with a defined inner and outer wall. To achieve the wall thickening, the mandrel rod 6 so far advanced in the direction of drawing that an inwardly directed wall thickening between the stopper 5 and pulling hole 7 arises. As the drawing continues, the inwardly directed wall thickening through the stopper acting as a reverse mandrel 4 pressed outwards up to the drawbar 8.

Hierdurch entsteht sowohl die gewünschte in den Abmaßen definierte Außenverdickung und ein gleichmäßiger Innendurchmesser. Durch gesteuertes Hin-und Herbewegen der Stopfenstange 6 können Länge und Abstand der verdickten Wandteile bestimmt werden. LeerseiteThis results in both the desired dimensions and defined External thickening and a uniform internal diameter. By controlled back and forth Moving the stopper rod 6 can length and distance of the thickened wall parts to be determined. Blank page

Claims (4)

Verfahren zur Herstellung von Rohren mit Wandverdickung Patentansprdche: 1. Verfahren zur kontinuierlichen Herstellung von Rohren mit örtlicher, am Umfang vorgesehener Wandverdickung und gleichmäßigem Innendurchmesser durch Ziehen, dadurch gekennzeichnet, daß zur Erzeugung der Verdickungen zunächst der Außen- und der Innendurchmesser des Rohres gegen eine Innenabstutzung verringert werden, wobei der Außendurchmesser seine in den nicht verdicksten Bereichen vorgesehene Endwandstärke erhält und daß anschließend der Innendurchmesser auf den ursprünglichen Innendurchmesser und der Außendurchmesser auf den gewünschten Außendurchmesser im Bereich der Verdickung!gegen eine Außenabstützun& vergrößert wird.Process for the production of pipes with wall thickening Patent claims: 1. Process for the continuous production of pipes with local, circumferential intended wall thickening and uniform inside diameter by pulling, thereby characterized in that to produce the thickenings, first of all the outer and inner diameters of the pipe against an internal support, the outer diameter receives its intended end wall thickness in the non-thickened areas and that then the inside diameter to the original inside diameter and the outer diameter to the desired outer diameter in the area of the thickening! against an outer support is enlarged. 2. Ziehvorrichtung zur Durchführung des Verfahrens nach Anspruch 1, gekennzeichnet durch einen Ziehring (2) mit abgesetzten Ziehholen (7,8), von denen der erste Ziehhol (7) eine lichte Weite aufweist, die dem minimalsten Außendurchmesser des zu erzeugenden Rohres entspricht und der zweite Ziehhol (8) eine lichte Weite besitzt, die dem maximalen Außendurchmesser der Verdickung entspricht, eine mit drei im definierten Abstand angeordneten Stopfen (3,4,5) versehene axial verschiebbare Dornstange (6), von denen der erste (3) und der dritte (4) Stopfen einen Außendurchmesser aufweisen, der dem gewünschten Innendurchmesser des Fertigrohres entspricht und der zweite Stopfen (5) einen Außendurchmesser besitzt, der um das Maß der gewünschten Wandverdickung kleiner ist als der Außendurchmesser der beiden anderen Stopfen (3,4).2. pulling device for performing the method according to claim 1, characterized by a drawing ring (2) with offset drawing holes (7, 8), of which the first drawbar (7) has a clear width that corresponds to the minimum outer diameter of the pipe to be produced and the second draw hole (8) has a clear width has, which corresponds to the maximum outside diameter of the thickening, one with three stoppers (3, 4, 5) arranged at a defined distance and provided axially displaceable Mandrel rod (6), of which the first (3) and the third (4) stopper have an outer diameter have, which corresponds to the desired inner diameter of the finished pipe and the second stopper (5) has an outer diameter which is as large as the desired Wall thickening is smaller than the outer diameter of the other two plugs (3, 4). 3. Ziehvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Abstand des ersten und dritten Stopfens (3,4) auf der Dornstange (6) voneinander dem Abstand des ersten Ziehhols (7) vom zweiten Ziehhol (8) entspricht.3. Pulling device according to claim 2, characterized in that the Distance between the first and third plugs (3, 4) on the mandrel rod (6) corresponds to the distance between the first drawbar (7) and the second drawbar (8). 4. Ziehvorrichtung nach den Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Stopfen wenigstens in Ziehrichtung mit konischen Abschrägungen versehen sind.4. Pulling device according to claims 2 and 3, characterized in that that the stopper is provided with conical bevels at least in the pulling direction are.
DE19803021481 1980-06-05 1980-06-05 Method and device for the production of pipes Expired DE3021481C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803021481 DE3021481C2 (en) 1980-06-05 1980-06-05 Method and device for the production of pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803021481 DE3021481C2 (en) 1980-06-05 1980-06-05 Method and device for the production of pipes

Publications (2)

Publication Number Publication Date
DE3021481A1 true DE3021481A1 (en) 1981-12-10
DE3021481C2 DE3021481C2 (en) 1983-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803021481 Expired DE3021481C2 (en) 1980-06-05 1980-06-05 Method and device for the production of pipes

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DE (1) DE3021481C2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4534199A (en) * 1982-09-16 1985-08-13 Kabushiki Kaisha Kobe Seiko Sho Method and apparatus for produced stepped tubes
EP0159426A1 (en) * 1984-04-16 1985-10-30 Sanwa Kokan Co. Ltd. Method and apparatus for cold drawing seamless metal tubes having upset portions at both ends
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
EP0760265A1 (en) * 1995-08-26 1997-03-05 Benteler Ag Tube and its application in the manufacturing of components of vehicle axles and vehicle axle with such a tube
DE102019103926A1 (en) * 2019-02-15 2020-08-20 Walter Henrich GmbH Method and device for the axial forming of a pipe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967487A (en) * 1930-03-20 1934-07-24 Mechanics Universal Joint Comp Method and apparatus for making propeller shafts
DE627064C (en) * 1934-04-24 1936-03-09 Fritz Singer Dr Process for the production of pipes with ring-shaped reinforcements
GB444834A (en) * 1934-12-19 1936-03-30 William Sadler Improvements relating to cycle handlebar tubes
US2228301A (en) * 1939-08-22 1941-01-14 Phelps Dodge Copper Prod Tube drawing method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967487A (en) * 1930-03-20 1934-07-24 Mechanics Universal Joint Comp Method and apparatus for making propeller shafts
DE627064C (en) * 1934-04-24 1936-03-09 Fritz Singer Dr Process for the production of pipes with ring-shaped reinforcements
GB444834A (en) * 1934-12-19 1936-03-30 William Sadler Improvements relating to cycle handlebar tubes
US2228301A (en) * 1939-08-22 1941-01-14 Phelps Dodge Copper Prod Tube drawing method and apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4534199A (en) * 1982-09-16 1985-08-13 Kabushiki Kaisha Kobe Seiko Sho Method and apparatus for produced stepped tubes
EP0159426A1 (en) * 1984-04-16 1985-10-30 Sanwa Kokan Co. Ltd. Method and apparatus for cold drawing seamless metal tubes having upset portions at both ends
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
EP0760265A1 (en) * 1995-08-26 1997-03-05 Benteler Ag Tube and its application in the manufacturing of components of vehicle axles and vehicle axle with such a tube
DE102019103926A1 (en) * 2019-02-15 2020-08-20 Walter Henrich GmbH Method and device for the axial forming of a pipe
WO2020165082A1 (en) 2019-02-15 2020-08-20 Walter Henrich GmbH Method and apparatus for axially shaping a tube

Also Published As

Publication number Publication date
DE3021481C2 (en) 1983-04-21

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee