EP0432485B1 - Verfahren und Vorrichtung zum Herstellen von Leichtmetallrohren grossen Durchmessers ausgehend von Rohren kleinen Durchmessers - Google Patents

Verfahren und Vorrichtung zum Herstellen von Leichtmetallrohren grossen Durchmessers ausgehend von Rohren kleinen Durchmessers Download PDF

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Publication number
EP0432485B1
EP0432485B1 EP90121705A EP90121705A EP0432485B1 EP 0432485 B1 EP0432485 B1 EP 0432485B1 EP 90121705 A EP90121705 A EP 90121705A EP 90121705 A EP90121705 A EP 90121705A EP 0432485 B1 EP0432485 B1 EP 0432485B1
Authority
EP
European Patent Office
Prior art keywords
tubing
mandrel
tube
diameter
pressing roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90121705A
Other languages
English (en)
French (fr)
Other versions
EP0432485A3 (de
EP0432485A2 (de
Inventor
Orlando Zaffaroni
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.)
VIS Srl
Original Assignee
VIS Srl
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 VIS Srl filed Critical VIS Srl
Publication of EP0432485A2 publication Critical patent/EP0432485A2/de
Publication of EP0432485A3 publication Critical patent/EP0432485A3/de
Application granted granted Critical
Publication of EP0432485B1 publication Critical patent/EP0432485B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging

Definitions

  • the invention concerns a process and an apparatus for the production of light alloy tubing according to the preambles of claims 1 and 3, as for example known from GB-A- 2007134.
  • Said apparatus comprises a mandrel (1) which is rotated by the motor (6) and a pressing roller (2) whose rotating motion is idling and which begins to rotate when between it and the mandrel (1) there is placed the tube to be processed (12) and the mandrel (1) begins to rotate.
  • the tube decreases in thickness and increases in diameter and length and there can be produced tubing having a diameter from 300mm to 1000mm starting from tubing having a diameter from 100mm to 400mm.
  • the apparatus consists basically of a mandrel (1) and a pressing roller (2).
  • the mandrel (1) is mounted on ball bearings and rotated by a pair of gears (4) integral with the pulley shaft (5) which is integral in turn with the motor (6) through a clutch.
  • the pressing roller (2) is mounted on large ball bearings and its motion is idling. It begins to rotate when it rests on the tube (12) to be processed and said tube rests in turn on the rotating mandrel.
  • the thrust of the pressing roller (2) against the tube (12) is exerted by rotating the pair of gears (7).
  • the pressing roller (2) is mounted on a misaligned axle and hence the rotation results in approach to and in withdrawal from the roller of the tube to be processed.
  • This arrangement makes it possible to secure high thrust on the roller with low torques at the shaft thereof.
  • a lever system (10) with its fulcrum (11) on the supporting structure and driven by the cylinder (3) makes the pressing roller unit (2) more rigid and eliminates bending almost entirely.
  • the process for production of tubing in accordance with the present invention is accomplished by means of the following operations.
  • the cylinder (3) holds the lever (10) in an oblique position as shown in FIG. 4 in broken lines while in the mandrel (1) is introduced the tube (12) to be processed.
  • the lever (10) is thrust by the cylinder (3) and moves to a vertical position engaging the terminal part of the shaft of the pressing roller (2).
  • the mandrel (1) is made to begin rotating and the shaft (14) of the pressing roller (2) is also made to begin operating and the misaligned rotation thereof permits approach of the pressing roller to the internal wall of the mandrel.
  • tubing with a diameter from 100mm to 400mm and thickness from 5mm to 40mm can be processed to produce tubing having a diameter from 300mm to 1000mm and thickness from 1mm to 20mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Forging (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (4)

  1. Verfahren zum Herstellen von Leichtmetallrohren mit Hilfe der folgenden Verfahrensschritte:
    a) ein Leichtmetallrohr (12) wird in einen Hohldorn (1) eingeführt,
    b) der Hohldorn (1) wird gedreht, und
    c) die Wanddicke des Rohres (12) wird durch eine Andrückrolle (2) gegen die Innenwand des Hohldornes (1) angedrückt, so daß aus einem Rohr (12) mit einem Durchmesser zwischen 100 und 400 mm und einer Wanddicke zwischen 5 und 40 mm ein Rohr (13) mit einem Durchmesser zwischen 300 und 1000 mm und einer Wanddicke zwischen 1 und 20 mm wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Rohr (13) mit dem vergrößerten Durchmesser und der verminderten Wanddicke nach einer 360°-Drehung der Achse (14) der Andrückrolle (2) erzeugt wird.
  3. Vorrichtung zum Herstellen von Leichtmetallrohren vergrößerten Durchmessers, ausgehend von einem Rohr mit kleinerem Durchmesser mit einem Hohldorn (1), der durch einen Motor (6) verdreht werden kann und einer Andrückrolle (2), deren Drehbewegung leerläuft und die dann umzulaufen beginnt, wenn zwischen ihr und dem Hohldorn (1) das zu bearbeitende Rohr (12) angeordnet wird und wenn der Hohldorn sich zu drehen beginnt, wobei ein Hebelsystem (10), das seinen Schwenkpunkt (11) am Maschinenbett hat, die Andrückrolle versteift.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Andrückrolle (2) auf einer exzentrischen Achse gelagert ist.
EP90121705A 1989-11-15 1990-11-13 Verfahren und Vorrichtung zum Herstellen von Leichtmetallrohren grossen Durchmessers ausgehend von Rohren kleinen Durchmessers Expired - Lifetime EP0432485B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2238689 1989-11-15
IT02238689A IT1236712B (it) 1989-11-15 1989-11-15 Procedimento e apparecchiatura per la produzione di tubi in lega leggera a diametro maggiorato a partire da tubi a diametro inferiore.

Publications (3)

Publication Number Publication Date
EP0432485A2 EP0432485A2 (de) 1991-06-19
EP0432485A3 EP0432485A3 (de) 1991-07-03
EP0432485B1 true EP0432485B1 (de) 1994-06-22

Family

ID=11195577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121705A Expired - Lifetime EP0432485B1 (de) 1989-11-15 1990-11-13 Verfahren und Vorrichtung zum Herstellen von Leichtmetallrohren grossen Durchmessers ausgehend von Rohren kleinen Durchmessers

Country Status (6)

Country Link
EP (1) EP0432485B1 (de)
AT (1) ATE107550T1 (de)
DE (1) DE69010163T2 (de)
DK (1) DK0432485T3 (de)
ES (1) ES2055851T3 (de)
IT (1) IT1236712B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8777277B2 (en) 2010-12-02 2014-07-15 Victaulic Company Pipe element having shoulder, groove and bead and methods and apparatus for manufacture thereof
US9038428B2 (en) 2011-09-02 2015-05-26 Victaulic Company Spin forming method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464253A (en) * 1967-06-29 1969-09-02 United States Pipe Foundry Method for rounding pipe
FR2195491B1 (de) * 1972-08-09 1975-03-07 Roulements Soc Nouvelle
GB2007134B (en) * 1977-11-04 1982-03-10 Honda Motor Co Ltd Apparatus for roll-forming seamless annular products
GB2025818B (en) * 1978-07-19 1982-06-09 Doncaster & Sons Ltd D Method of producing rings from aluminium-based alloys
DE3237295A1 (de) * 1982-10-08 1984-04-12 Stahlwerke Plate GmbH & Co KG, 5880 Lüdenscheid Ringwalzwerk
DE3717423A1 (de) * 1987-04-07 1988-10-27 Ragettli Christian Ag Verfahren zum profilformen von als rollkoerper ausgebildeten werkstuecken und einrichtung zur ausuebung des verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8777277B2 (en) 2010-12-02 2014-07-15 Victaulic Company Pipe element having shoulder, groove and bead and methods and apparatus for manufacture thereof
US10161547B2 (en) 2010-12-02 2018-12-25 Victaulic Company Device and method for forming pipe elements
US9038428B2 (en) 2011-09-02 2015-05-26 Victaulic Company Spin forming method

Also Published As

Publication number Publication date
EP0432485A3 (de) 1991-07-03
ATE107550T1 (de) 1994-07-15
ES2055851T3 (es) 1994-09-01
EP0432485A2 (de) 1991-06-19
IT1236712B (it) 1993-03-26
DE69010163D1 (de) 1994-07-28
DE69010163T2 (de) 1994-10-06
DK0432485T3 (da) 1994-07-25
IT8922386A1 (it) 1991-05-15
IT8922386A0 (it) 1989-11-15

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