EP0044795B1 - Aufweitkopf zum Aufweiten von Rohrenden - Google Patents

Aufweitkopf zum Aufweiten von Rohrenden Download PDF

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Publication number
EP0044795B1
EP0044795B1 EP81420105A EP81420105A EP0044795B1 EP 0044795 B1 EP0044795 B1 EP 0044795B1 EP 81420105 A EP81420105 A EP 81420105A EP 81420105 A EP81420105 A EP 81420105A EP 0044795 B1 EP0044795 B1 EP 0044795B1
Authority
EP
European Patent Office
Prior art keywords
jaws
socket
expansion head
groove
retaining
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
Application number
EP81420105A
Other languages
English (en)
French (fr)
Other versions
EP0044795A2 (de
EP0044795A3 (en
Inventor
Daniel Filliat
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.)
Unicum Sa SA
Original Assignee
Unicum Sa SA
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 Unicum Sa SA filed Critical Unicum Sa SA
Priority to AT81420105T priority Critical patent/ATE11115T1/de
Publication of EP0044795A2 publication Critical patent/EP0044795A2/de
Publication of EP0044795A3 publication Critical patent/EP0044795A3/fr
Application granted granted Critical
Publication of EP0044795B1 publication Critical patent/EP0044795B1/de
Expired 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
    • B21D41/026—Enlarging by means of mandrels

Definitions

  • the invention relates to an expansion head for an apparatus for flaring or widening the ends of tubes or the like.
  • Apparatuses for flaring the ends of the tubes corresponding to the preamble of claim 1 are already known (French Patent No. 2,371,981). These devices respectively have a body with means for moving a mandrel whose conical end acts in thrust in the corresponding bore of a plurality of concentric and independent jaws in the form of sectors connected by an elastic retaining means, positioned in a circular groove established below the flange common to each aforementioned jaw so as to constitute the actual expansion head, the flange of which bears in the stepped bore of a socket fixed at the end of the body.
  • Such devices and in particular their expansion heads have drawbacks caused by the positioning and the very conformation of the elastic means ensuring the retention of the jaws between them.
  • This elastic means is housed and positioned in a groove formed circularly at the periphery of the collar of the sleeve, so that it considerably limits the dimensioning of the jaws of the expansion head for the same sleeve. It turns out to be necessary to have several ranges of sockets corresponding to different ranges of dimensions of the jaws of the expansion head, and this results in a significant cost and storage.
  • the invention as characterized in the claims overcomes these drawbacks and is remarkable in that all the jaw retaining means are arranged below their common flange to allow a wide range of jaw dimensions with the same socket.
  • the elastic, but retractable means for retaining said jaws relative to the bottom of said sleeve is centered and positioned in a groove of the aforementioned jaws, while alternately overflowing the outside diameter of the expansion head in order to ensure its axial retention in height, in combination with on the one hand the underside of the sleeve and on the other hand the opposite flange bearing on the internal shoulder of said sleeve.
  • this apparatus comprises a body (1) with displacement means by cam (2 1 ) and lever (2) of a mandrel (3) whose conical end (3 1 ) acts in thrust on a head of expansion (T) housed inside a socket (4) fixed at the end of the body (1).
  • the sleeve (4) is tapped at (4 1 ) to be screwed onto the external thread (1 1 ) of the body (1).
  • the lower part of the sleeve (4) is pierced at (4 2 ) with a hole of diameter smaller than said internal thread, to form a shoulder (4 3 ) allowing the positioning, the passage and the overflow of the expansion head (T).
  • the expansion head (T) is produced from several jaws (5), FIG. 3, generally six, in the form of sectors, which have, from their common internal edge (5 1 ), recesses (5 2 ) flared from their lower end, to form, after circular positioning of the sectors, a conical bore (5 3 ), Figures 1 and 2.
  • the different jaws (5) are held circularly between them by an elastic member (0).
  • the elastic means (O) for holding the jaws (5) is positioned in a circular groove (5 4 ) established below an externally squared edge (5 5 ), of small diameter, common to each jaw, to constitute, after their circular coaxial mounting, a support flange on the shoulder (4 3 ) of the sleeve (4). This arrangement allows a wide range of jaw dimensions with the same socket.
  • the elastic retaining means (O) of the jaws (5) is a spring (6) with at least one flat bearing face (6 1 ) intended to cooperate with the corresponding bottom (5 6 ) of the groove (5 4 ) which constitutes a flat surface. It follows that the flat support face (6 1 ) of the spring, in combination with the bottom of the groove (5 4 ), determines a support along a peripheral surface forming a scope for self-centering and stable positioning in height of the jaws (5), thereby avoiding an imbalance in all directions, in particular during assembly (assembly and disassembly).
  • the spring (6) is open at (6 2 ) to give it a certain diametrical expansion when the mandrel (3) is pressed into the resulting bore (5 3 ) of the jaw assembly (5), with a view to their possible spacing.
  • the opening (6 2 ) of the spring (6) allows the introduction of a clamp specially shaped to allow its spacing relative to the set of jaws, for its assembly and / or disassembly.
  • the spring (6) always with an internal planar support face, may not be open, on the sole condition that it is made of a material capable of undergoing a diametrical expansion by elasticity in particular, with a view to mounting and dismounting on the one hand, and on the other hand so as not to hinder the spacing of the jaws (5).
  • an elastic member (A) is suitably profiled for, on the one hand being centered in an external groove (5 7 ) common to the jaws (5), and on the other hand, alternately overflowing the external diameter of the head (T), in order to ensure its axial retention in combination with the underside (4 4 ) of the sleeve (4) and the support flange (5 5 ) of said jaws (5).
  • the elastic member (A) is an open pin spring (7), of pentagonal shape ( Figures 1 and 2), the sides (7 1 ) of which are centered and positioned in the groove (5 7 ) and whose projecting vertices (7 2 ) project beyond the outside diameter of the socket (4) to be applied to the underside (4 4 ) of said socket (4), Figures 4 and 6, when the flange ( 5 5 ) is supported on the shoulder (4 3 ) of the sleeve (4). It is obvious that the groove (5 7 ) is machined at a distance (d) from the underside of the collar (5 5 ), equal to the depth of the hole (4 2 ) of the sleeve (4). There is therefore no clearance at height ( Figures 4 and 5).
  • the pin spring (7) is open so as not to harm the diametrical expansion of the jaws (5); for this purpose, in a preferred manner, the spring (7) is split in line with one of its vertices (7 2 ).
  • the pentagonal shape of the spring (7) is preferred although not limiting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Endoscopes (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Paper (AREA)
  • Joints Allowing Movement (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Pipe Accessories (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Coating With Molten Metal (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Ceramic Products (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Lubricants (AREA)

Claims (5)

1. Expansionskopf für ein Gerät zum Ausweiten oder Erweitern der Enden von Rohren, der in der Hauptsache ein Gehäuse (1) mit Verschiebungsmitteln (2-21) für einen Dorn (3) aufweist, dessen kegelförmiges Ende (3') schubwirkend in der entsprechenden Bohrung (53) einer Vielzahl von als durch ein elastisches Haltemittel (O) verbundene Sektoren gebildeten unabhängigen konzentrischen Backen (5) vorgesehen wird wobei das federnde Haltemittel in einer unterhalb des jedem der vorerwähnten Backen (5) gemeinsamen Bunds (55) vorgesehenen kreisförmigen Rille (54) positioniert ist, um den eigentlichen Expansionskopf zu bilden, dessen Bund (55) in der unterstützten Bohrung (43) einer am Ende des Gehäuses (1) befestigten Fassung (4) abgestützt wird, dadurch gekennzeichnet, dass alle die Haltemittel (O und A) der Backen (5) unterhalb ihres gemeinsamen Bunds (55) zum Ermöglichen einer weitgehenden Reihe von Abmessungen der Backen (5) mit derselben Fassung (4) angebracht sind, und dass das elastische jedoch zurückklappbare Haltemittel (A) der besagten Backen (5) hinsichtlich des Bodens der genannten Fassung (4) in einer Rille (57) der vorerwähnten Backen (5) bei abwechselndem Hinausragen aus dem äusserlichen Durchmesser des Expansionskopfs (T) zum achsialen Halten desselben in der Höhe in Kombination einerseits mit der Unterseite (44) der Fassung (4) und andererseits mit dem auf dem Innenaufsatz (43) abgestützten entgegengesetzten Bund (55) der besagten Fassung (4) zentriert und positioniert wird.
2. Expansionsknopf nach Anspruch 1, dadurch gekennzeichnet, dass das Haltemittel (O) der Backen (5) eine kreisförmige geöffnete Feder (6) mit am wenigstens einer ebenen Stützfläche (61) ist, die zum Erreichen einer Abstützung gemäss einer eine Lagefläche bildenden Umfangsfläche mit dem entsprechenden Boden (56) der Rille (54) zusammenwirkt, um die Selbstzentrierung und die beständige Positionierung in der Höhe der besagten Backen (5) bei Vermeide für dieselben einer Gleichgewichtstörung in allen Richtungen, insbesondere bei dem Zusammenbau, zu gestatten.
3. Expansionskopf nach Anspruch 1 und 2, dadurch gekennzeichnet, dass das zurückklappbare federnde Haltemittel (A) der Backen (5) in bezug auf die Fassung (4) eine geöffnete fünfeckige Nadelfeder (7) ist, derer Seiten (71) in der Rille (57) zentriert und positioniert sind, wobei die vorspringenden Scheitelpunkte (72) dieser Feder aus dem äusserlichen Durchmesser der Fassung (4) bei Auflegen auf die Unterseite (44) der Fassung (4) hinausragen.
4. Expansionskopf nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Feder (6) bei (62) geöffnet ist und insbesondere die Einführung einer zum Auseinanderspreizen der besagten Feder in bezug auf den Satz-der Backen (5) für die Montierung oder die Abnahme dieser Feder geeigneten Zange gestattet.
5. Expansionskopf nach Anspruch 1 und 2, dadurch gekennzeichnet, dass der Boden (56) der Rille (54) eben und parallel zu den Zeugenden des Gehäuses (1) des besagten Expansionskopfs ist.
EP81420105A 1980-07-18 1981-07-16 Aufweitkopf zum Aufweiten von Rohrenden Expired EP0044795B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420105T ATE11115T1 (de) 1980-07-18 1981-07-16 Aufweitkopf zum aufweiten von rohrenden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8016173 1980-07-18
FR8016173A FR2486834A1 (fr) 1980-07-18 1980-07-18 Tete d'expansion pour un appareil destine a evaser ou a elargir les extremites des tubes ou similaires

Publications (3)

Publication Number Publication Date
EP0044795A2 EP0044795A2 (de) 1982-01-27
EP0044795A3 EP0044795A3 (en) 1982-05-12
EP0044795B1 true EP0044795B1 (de) 1985-01-09

Family

ID=9244417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420105A Expired EP0044795B1 (de) 1980-07-18 1981-07-16 Aufweitkopf zum Aufweiten von Rohrenden

Country Status (10)

Country Link
EP (1) EP0044795B1 (de)
AT (1) ATE11115T1 (de)
BE (1) BE889656A (de)
CH (1) CH641383A5 (de)
DE (2) DE3168139D1 (de)
DK (1) DK309481A (de)
FI (1) FI812242L (de)
FR (1) FR2486834A1 (de)
IT (1) IT1138063B (de)
NO (1) NO153720C (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615198A (en) * 1985-06-26 1986-10-07 Westinghouse Electric Corp. Apparatus and method for reforming and rolling tube ends
DE4202348C1 (en) * 1992-01-29 1993-06-09 Rothenberger Werkzeuge-Maschinen Gmbh, 6233 Kelkheim, De Tube end expansion tool - has holding drillings for guide pins at inner and outer flange sectors
CH699306A1 (de) * 2008-08-13 2010-02-15 Finemon Ag Aufweitwerkzeug für Rohre und Rohrpresskupplung.
DE202010004948U1 (de) * 2010-04-13 2011-09-01 Rehau Ag + Co. Expanderkopf für hohle Werkstücke mit geführten Segmenten
DE102012100894A1 (de) 2012-02-03 2013-08-08 Rehau Ag + Co Expansionskopf für Aufweitwerkzeuge, diesen umfassendes Expansionswerkzeug sowie deren Verwendung
DE202012104450U1 (de) 2012-11-19 2014-02-25 Rehau Ag + Co Expansionskopf für Aufweitwerkzeuge und diesen umfassendes Expansionswerkzeug
CN106584877B (zh) * 2016-12-09 2023-05-30 重庆寅悦恒工贸有限公司 车用管件定心机构
DE202019107067U1 (de) * 2019-12-18 2021-03-19 Rehau Ag + Co Expansionskopf für Aufweitwerkzeuge sowie diesen umfassendes Aufweitwerkzeug

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1291839A (en) * 1969-07-18 1972-10-04 Dale Ltd John A taper-expanding mandrel
US3888102A (en) * 1972-10-10 1975-06-10 Salvatore A Nigido Swedger apparatus
DE2505915A1 (de) * 1975-02-13 1976-08-26 Rothenberger Schweisstech Vorrichtung zum aufweiten von rohrleitungsenden
DE2552607C2 (de) * 1975-11-24 1985-08-01 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt Handwerkzeug zum Aufweiten von Rohrleitungsenden
DE2654102C2 (de) * 1976-11-29 1984-01-05 Rothenberger GmbH & Co Werkzeuge-Maschinen KG, 6000 Frankfurt Expansionskopf für Rohraufweitegeräte mit auswechselbaren Expansionsbacken

Also Published As

Publication number Publication date
NO153720B (no) 1986-02-03
IT1138063B (it) 1986-09-10
CH641383A5 (fr) 1984-02-29
DE3168139D1 (en) 1985-02-21
BE889656A (fr) 1981-11-16
NO153720C (no) 1986-05-14
EP0044795A2 (de) 1982-01-27
IT8122943A0 (it) 1981-07-15
DK309481A (da) 1982-01-19
NO812413L (no) 1982-01-19
ATE11115T1 (de) 1985-01-15
FR2486834A1 (fr) 1982-01-22
FR2486834B1 (de) 1985-04-05
DE44795T1 (de) 1983-08-04
FI812242L (fi) 1982-01-19
EP0044795A3 (en) 1982-05-12

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