EP1160027B1 - Aufweitzange - Google Patents

Aufweitzange Download PDF

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Publication number
EP1160027B1
EP1160027B1 EP01202022A EP01202022A EP1160027B1 EP 1160027 B1 EP1160027 B1 EP 1160027B1 EP 01202022 A EP01202022 A EP 01202022A EP 01202022 A EP01202022 A EP 01202022A EP 1160027 B1 EP1160027 B1 EP 1160027B1
Authority
EP
European Patent Office
Prior art keywords
tube
buffer
shaft
stop
diameter
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
EP01202022A
Other languages
English (en)
French (fr)
Other versions
EP1160027A1 (de
Inventor
Bernard Paumier
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.)
Alphacan SAS
Original Assignee
Alphacan SAS
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 Alphacan SAS filed Critical Alphacan SAS
Publication of EP1160027A1 publication Critical patent/EP1160027A1/de
Application granted granted Critical
Publication of EP1160027B1 publication Critical patent/EP1160027B1/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
    • B21D41/026—Enlarging by means of mandrels

Definitions

  • the invention relates to the connection of tubes, and more specifically, the devices for the production of sockets on plastically deformable tubes.
  • An socket designates the connection of two tubes of diameters substantially equivalents by interlocking a tube in the other or by interlocking tubes and an intermediate piece.
  • a female socket designates a slight increasing the inside diameter of a tube over a given length, which can be performed by plastic deformation.
  • the term "socket" is used to denote a female socket made by plastic deformation.
  • the socket assembly applies in particular to assembled copper tubes by welding or brazing, or synthetic tubes connected by inserts.
  • the JR company sells a pair of tilting tweezers sectors.
  • This tool stepped, type J.R clamp consists of two articulated handles and a mouthpiece.
  • the tip consists of two stacks of half-cylinders of different diameters, which are articulated at the level of a generator of their peripheral surface.
  • the socket is made by inserting the end piece into the tube to deform, then exerting successive pressure on the handles. We do thus pivot the half-cylinders together and they thus deform the tube to to form a socket.
  • This clamp can be used for different diameters but it is essentially intended for the forming of annealed annealed copper tube sockets casing and solder.
  • the instructions for use with the annealed copper tube recommend progressive action with rotation of the tip in the tube.
  • SAPER also markets multi-sector socket pliers.
  • the tip is of cylindrical shape, composed of several metal sectors deviating under the action of a cone. A set of sectors is reserved for only one diameter of the tube to be deformed. Changing to a different diameter tube requires thus the change of the complete tip. This tool proves more accurate than the previous, with a higher cost in return.
  • GB-639 103 discloses a device for forming a socket.
  • This device consists of a die, a bit and an actuating key of the mouthpiece.
  • the matrix is formed of two articulated parts defining the profile final exterior of a tube.
  • the articulated parts also define a stop for the end of the tube and a stop for the actuating key.
  • the actuation key is consisting of a cylindrical sleeve having an inner thread and a bar through the sleeve and disposed perpendicularly to the sleeve.
  • Buffer comprises a threaded cylindrical rod integral with a piston.
  • a buffer is arranged against the piston and surrounds an unthreaded portion of the rod. The rotation of the key causes compression of the buffer between the piston and the abutment of the tube. Buffer thus widens radially.
  • JP09193250 discloses a method of forming a socket.
  • the end of a polyethylene tube is heated.
  • This rod ends with a stop in contact with the buffer.
  • Another stop is brought into contact with the pad.
  • a cylinder pulls on the rod.
  • the buffer is thus compressed between the stops and widens radially.
  • Document FR-A-2,380,831 describes a tool for forming a socket comprising an expandable mandrel fitting into the tube.
  • This chuck is consisting of several segments connected to each other elastically. These segments form a conical axial passage for the passage of a conical needle. The traction of the needle causes the radial expansion of the mandrel.
  • EP-A-0 397 570 discloses a plug forming apparatus. This apparatus has a fixed handle provided with movable jaws, a mandrel with conical end and a movable handle articulated on the mandrel by a pivot. The mobile handle is further connected by a rod, offset from the axis of the mandrel, with movable handle.
  • the invention proposes a solution to these various problems; she proposes a pliers provided with an end piece making it possible to obtain at the same time a uniform deformation of the tube and high deformation precision, both in length and diameter.
  • the invention allows simplified handling during the realization of the socket.
  • the invention also improves the life of the clamp and tips.
  • the invention also allows to obtain a conical socket bottom.
  • the invention relates to a socket pliers comprising a tip having an elastomeric pad an axial stop, a traversing shaft said buffer, the shaft causing the abutment in translation to the buffer when it is stressed, a thrust washer pierced by a hole through which the shaft passes, means of traction of the shaft, opposite the hole, the traction means having a body with a handle and a through cavity formed in the body, said washer of abutment substantially closing one end of the cavity, a piston sliding in said cavity, in which are formed means for coupling the shaft, a lever mobile rotatably mounted on the handle and one end of which urges the piston.
  • the end of the lever is separable from the piston.
  • the lever is rotatably mounted on the handle by via at least one link.
  • the buffer is substantially cylindrical in shape.
  • the stop has a circular face of diameter substantially equal to the diameter of the buffer.
  • the stop is metallic.
  • the buffer comprises several elastomer washers.
  • metal washers are interposed between elastomeric washers.
  • each buffer has a hardness of between 50 and 110 Shore A.
  • the invention proposes to make a socket in a tube, to compress axially inside the tube and between two stops an elastomeric buffer, for cause its radial enlargement.
  • the radial deformation of the buffer causes the formation of the socket when the buffer comes into contact with the wall of the tube in which it is inserted.
  • the invention also proposes a device facilitating the compression buffer between the two axial stops.
  • the invention thus makes it possible to achieve a localized increase in the diameter a tube, uniform and of great precision, with simple handling tools and with a long life.
  • Tests have shown a holding of the top nozzle to 50000 maneuvers.
  • the body of the tool withstood more than 250000 maneuvers without failure.
  • FIG. 1 is a diagrammatic sectional view of a socket pliers, a tip and a tube, before forming an socket according to the invention.
  • the figure shows in section a tube 1, at the end of which a tip 2 is inserted.
  • tip comprises a stop 3, a shaft 5 and an elastomer pad 4.
  • An elastomeric buffer here designates a buffer that is both incompressible, but deformable.
  • the fact that the buffer is incompressible ensures that it deforms radially when it is stressed axially in compression by the stop and the clamp, as explained below; preferably, the change in volume of the buffer, when is subjected to a pressure of 50 MPa, is less than 5%. This value ensures that the deformation of the buffer actually causes deformation of the tube in which the tip is inserted.
  • the fact that the pad is deformable ensures that it deforms radially when compressed, and that it exerts a pressure substantially constant over the entire inner surface of the tube with which it is in contact.
  • the pad has two faces, substantially perpendicular to the axis of the tip and parallels: the first face is in contact with the stop 3, the second face is a free face. In the example, it has a substantially cylindrical shape, which corresponds to the inner cross section of the tube.
  • the stop 3 is disposed against one side of the buffer 4, and extends substantially on the entire face of the stamp. Its function is to transmit an axial force of compression on the buffer.
  • the shaft 5 passes through the buffer and is connected to the stop 3 of so as to enable it to transmit to stamp 4 a force exerted on the tree. can transmit an axial force on the abutment 3.
  • the shaft 5 is a steel neck piece, which is screwed on the stop 3.
  • the traction force is transmitted to the stop.
  • the stop therefore exerts an effort on the buffer.
  • a second stop described later, against the free face of the buffer, it compresses axially the buffer between these two stops, and thus generates a radial expansion buffer.
  • the buffer is deformable, so we can vary its length.
  • a decrease in its length implies a increase of its diameter.
  • the axially compressed buffer extends radially as and when the compression imposed on it, and radially solicits the tube in which it is inserted. The radial force is exerted by the buffer on the walls of the tube against which the periphery of the buffer abuts.
  • a buffer is preferably chosen made of an elastomeric material, for its deformability and incompressibility properties, as for example a silicone derivative or a polyurethane.
  • substantially cylindrical buffers for favor the homogeneity of the deformation of generally cylindrical tubes, it is it is preferable to use substantially cylindrical buffers because the buffer thus comes directly into contact with the entire surface to be deformed.
  • the buffer section preferably corresponds to the inner section of the tube to deform, with a game allowing the introduction of the buffer in the tube.
  • the buffer can also be interesting to control the hardness of the buffer. This ensures that the buffer can thus deform the tube homogeneously during its deformation, even in the event of a defect in the tube, or in the case where the outer section of the buffer is not exactly the same as the tube. Hardness between 50 and 110 Shore A seems particularly suited. It is also better to choose a elastomer having a good resistance to time and good chemical resistance, in particular to resist the fats and solvents commonly used in construction.
  • An additional advantage of the buffer according to the invention is that because of the deformability of the elastomeric buffer, the junction 15 between the socket 16 and the rest of the tube is progressive and conical.
  • the stop 3 of the nozzle has the function of axially compressing a face of the buffer, and more specifically the face of the buffer that is embedded in the tube.
  • the stop is chosen with a circular compression face, of diameter substantially equal to the diameter of the buffer, so as to compress the most large area of the buffer possible.
  • the diameter of a cylindrical tampon used is very close to the initial diameter of the portion of tube to be deformed. So, if we uses a stop diameter close to the buffer diameter, axial flow is avoided buffer during compression, detrimental to the operation of the device.
  • the stop is metallic to allow a good transmission of compressive forces imposed on the buffer. We can finally realize a rounded advance on the free side of the stamp, to facilitate its insertion into the inside of the tube.
  • the stop has fastening means on the shaft 5, so that transmit to the elastomeric buffer the forces exerted by the shaft.
  • the function of the shaft is to transmit to the abutment a compression force of the mouthpiece. It can therefore have any form. Having it available at buffer center avoids limiting the radial deformation of the buffer.
  • the shaft has fastening means on the stop, in the example a thread of its end.
  • the rod of the screw would then serve while the head of the screw serves as a stop.
  • the invention also proposes a clamp 6 intended to exert traction on the shaft 5 of the nozzle and provide a stop complementary to the stop of the tip.
  • the structure of this clamp will appear more clearly from the following description of the operation of a tip coupled to a clamp.
  • An example of realization of a such clamp is shown in Figure 3.
  • the clamp 6 comprises a body 7 with a handle 13, a lever 8, a piston 9, a rod 10, a compression stop 11 and an ankle 17.
  • the body 7 is made of treated steel. It defines a cavity 12 crossing it from in part, and is attached to the end of a handle 13.
  • the piston 9 is shaped to slide in the cavity 12 and protrudes from one end of the cavity.
  • On a part protruding from this piston is mounted a pin 17, which serves for the attachment of the lever 8.
  • the end of the lever 8 is fork-shaped and has two ends parallel planes each with a recess into which one end of the ankle 12. The lever can thus rotate around this ankle, while training it. Conversely, the lever 8 can easily be released from the end of the piston.
  • a rod 10 pivots at one of its ends around an axis of the lever 8, which is close its end shaped fork. This rod 10 pivots at its other end around an axis of the handle 13.
  • This rod can be doubled by a second connecting rod symmetrically on the other side of the lever 8 and the handle 13.
  • handle 13 is integral with the body 7 and extends substantially radially relative to the common axis of the piston 9 and the cavity 12.
  • the second end of the cavity 12 is partially blocked by a washer 11. This washer is pierced so as to leave pass the tree 5.
  • the piston has means for fixing the free end of the shaft of a tip. It can be simply a tapped hole, allowing the assembly of the tree by screwing.
  • the operation of the clamp is as follows. A tip is attached to the piston 9, the shaft passing through the hole of the washer 11. In this position, as shown in FIG. 1, the buffer of the endpiece is in contact with the washer of the forceps of a part and the abutment on the other hand. It will be noted that for fixing the mouthpiece on the piston, the lever 8 can be disengaged from the end of the piston which protrudes from the body 7. This makes it possible to turn the piston, or to change it easily, for example if there are several types of trees with different attachment means.
  • the lever 8 is hooked on the end of the piston.
  • the tip can be introduced at the end of a tube; before, the tube if necessary cut to the right length, well perpendicularly.
  • the tip is inserted into the tube, so that the end of the tube comes into contact with the washer 11 of the clip, and that the elastomeric pad is entirely in the tube. This configuration is shown in Figure 1.
  • the shaft 5 is urged by traction, which has the effect of compressing the buffer between the stop 3 and the washer 11, and thus increase the diameter of the pad. It follows an expansion of the diameter of the tube to the right of these washers, and a plastic deformation of the tube.
  • the tubes that can be formed with the tool are in particular copper tubes annealing with a diameter of 12 mm to 20 mm, or tubes made of DN 12 synthetic materials to DN 25 in series 5, from DN 16 to DN 25 in series 3.2, tubes of minimum thickness 2mm from DN12 to DN22, or composite tubes with metal core from DN 14 to DN22. It is particularly possible to use the tubes sold by the applicant under the trademark RETUBE, which are cross-linked polyethylene tubes.
  • the socket made according to the invention reduces the risk of thinning or localized bleaching.
  • the invention makes it possible to reduce the risk of making embellings defective.
  • the socket has a uniform diameter expansion on the whole periphery of the tube, with an absence of any generator preferentially sought.
  • the gradual deformation of the pad makes it possible to create a socket bottom conical, which is particularly useful when using inserts of fitting, such as splined fitting inserts.
  • the bottom cone of nesting allows thus forming a stop for the insert. This cone also allows the jamming of this insert and thus avoids the unexpected fall of the connection during handling phases later.
  • the invention is of course not limited to the embodiments described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Processing Of Terminals (AREA)
  • Insulated Conductors (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (9)

  1. Aufweitzange, welche aufweist:
    ein Ansatzstück, welches aufweist:
    einen Elastomer-Stopfen (4),
    ein axiales Lager (3),
    eine Achse (5), welche den Stopfen (4) durchquert, wobei von der Achse (5) das Lager (3) in Translation hin zu dem Stopfen mitgenommen wird, wenn sie gezogen wird,
    eine Anschlagscheibe (11), welche von einem Loch durchdrungen ist, welches von der Achse (5) durchquert ist,
    Mittel zum Ziehen (7, 8, 9, 10, 12, 13, 17) der Achse (5), welche dem Loch gegenüberstehen,
    dadurch gekennzeichnet, dass:
    die Mittel zum Ziehen aufweisen:
    einen Körper (7) mit einem Griff (13) und einem durchgängigen Hohlraum (12), welcher in dem Körper (7) ausgespart ist, wobei die Anschlagscheibe (11) ein Ende des Hohlraums im Wesentlichen verschließt,
    einen in dem Hohlraum (12) verschiebbaren Kolben (9), in welchem Mittel zum Kuppeln der Achse ausgespart sind,
    einen an dem Griff (13) schwenkbar montierten bewegbaren Hebel (8), von dem ein Ende den Kolben (9) zieht.
  2. Aufweitzange gemäß Anspruch 1, dadurch gekennzeichnet, dass das Ende (8) des Hebels vom Kolben (9) abtrennbar ist.
  3. Zange gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Hebel (8) durch die Zwischenanordnung von mindestens einem Schwingarm (10) an dem Griff (13) schwenkbar montiert ist.
  4. Aufweitzange gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Stopfen (4) von einer im Wesentlichen zylindrischen Form ist.
  5. Aufweitzange gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Lager (3) eine kreisförmige Fläche mit einem Durchmesser aufweist, welcher im Wesentlichen gleich dem Durchmesser des Stopfens (4) ist.
  6. Aufweitzange gemäß einem de Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Lager (3) metallisch ist.
  7. Aufweitzange gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Stopfen (4) mehrere elastomere Scheiben aufweist.
  8. Aufweitzange gemäß Anspruch 7, dadurch gekennzeichnet, dass metallische Scheiben (14) zwischen die elastomeren Scheiben eingeschoben sind.
  9. Aufweitzange gemäß einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass jeder Stopfen (4) eine Härte hat, welche zwischen 50 und 110 Shore A ist.
EP01202022A 2000-05-30 2001-05-29 Aufweitzange Expired - Lifetime EP1160027B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006917A FR2809651B1 (fr) 2000-05-30 2000-05-30 Pince a emboiture
FR0006917 2000-05-30

Publications (2)

Publication Number Publication Date
EP1160027A1 EP1160027A1 (de) 2001-12-05
EP1160027B1 true EP1160027B1 (de) 2005-04-06

Family

ID=8850778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202022A Expired - Lifetime EP1160027B1 (de) 2000-05-30 2001-05-29 Aufweitzange

Country Status (4)

Country Link
EP (1) EP1160027B1 (de)
AT (1) ATE292530T1 (de)
DE (1) DE60109849D1 (de)
FR (1) FR2809651B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11054076B2 (en) 2016-11-04 2021-07-06 Zurn Industries, Llc Reinforcing ring with sleeve
US11543065B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Extruded cold-expansion compression collar
US11541581B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Injection molded cold-expansion compression collar

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103521561B (zh) * 2013-10-22 2015-05-20 郑州科技学院 金属管道修直装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB639103A (en) * 1948-05-12 1950-06-21 Harrison Venning Tool Company Improvements in metal tube expanders
FR2380831A1 (fr) * 1977-02-22 1978-09-15 Beauvillier & Cie Appareil a former des emboitures
US4779333A (en) * 1987-09-24 1988-10-25 Foster Wheeler Energy Corporation Sleeve to tubesheet expander tool
FR2646792A1 (fr) * 1989-05-12 1990-11-16 Virax Sa Appareil destine a elargir ou evaser les extremites des tubes
JPH09193250A (ja) * 1996-01-17 1997-07-29 Takanori Yamanami 合成樹脂製管の接続方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11543065B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Extruded cold-expansion compression collar
US11541581B2 (en) 2016-09-02 2023-01-03 Zurn Industries, Llc Injection molded cold-expansion compression collar
US11054076B2 (en) 2016-11-04 2021-07-06 Zurn Industries, Llc Reinforcing ring with sleeve

Also Published As

Publication number Publication date
FR2809651B1 (fr) 2002-09-13
ATE292530T1 (de) 2005-04-15
EP1160027A1 (de) 2001-12-05
DE60109849D1 (de) 2005-05-12
FR2809651A1 (fr) 2001-12-07

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