EP0982086A1 - Vorrichtung zum Ausweiten eines Rohrendes - Google Patents

Vorrichtung zum Ausweiten eines Rohrendes Download PDF

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Publication number
EP0982086A1
EP0982086A1 EP99202696A EP99202696A EP0982086A1 EP 0982086 A1 EP0982086 A1 EP 0982086A1 EP 99202696 A EP99202696 A EP 99202696A EP 99202696 A EP99202696 A EP 99202696A EP 0982086 A1 EP0982086 A1 EP 0982086A1
Authority
EP
European Patent Office
Prior art keywords
clamping
mandrel
another
lever
support
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.)
Withdrawn
Application number
EP99202696A
Other languages
English (en)
French (fr)
Inventor
Victor Michael Alexander Barendregt
Karel De Ruiter
Felix Johannes Adrianus Hakkeling
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.)
Vsh Fabrieken Nv
Original Assignee
Vsh Fabrieken Nv
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 Vsh Fabrieken Nv filed Critical Vsh Fabrieken Nv
Publication of EP0982086A1 publication Critical patent/EP0982086A1/de
Withdrawn legal-status Critical Current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
    • B21D41/021—Enlarging by means of tube-flaring hand tools

Definitions

  • the invention relates to a device for widening an end portion of a pipe part, comprising a clamping member for clamping a pipe part to be widened on the outside, and a mandrel directed towards the clamping member, for widening an end portion of a clamped pipe part, the clamping member and the mandrel being displaceable with respect to one another substantially in the axial direction of the mandrel, and furthermore comprising a clamped-actuating mechanism for actuating the clamping member, and a displacement mechanism for displacing the clamping member and the mandrel with respect to one another, and at least one actuating member for actuating the clamp-actuating mechanism and the displacement mechanism.
  • the clamping member is formed by the jaws of a special type of pincers with two levers, the first jaw being fixedly connected to one of the levers, and the second jaw being rotatably connected to the first jaw and being actuated, via a bar mechanism, by the other lever of the pincers.
  • the mandrel is connected to a bar mechanism which is arranged on the first jaw and the lever which is fixedly connected thereto and is actuated by a third lever which is rotatably connected to the fixed bar of the pincers. The mandrel can be displaced by actuation of the third lever.
  • the drawback of the known device is that three levers have to be actuated in order for an end portion of a pipe part to be clamped securely in place and widened, which is awkward and requires a number of operations.
  • the object of the invention is to provide a device for widening an end portion of the pipe part, with which the end portion can be clamped in place and widened in a single operation.
  • an end portion of a pipe part can be clamped in place and widened in a single operation, and this is a considerable advantage in practice.
  • Fig. 1, 1 denotes a first possible embodiment of the device according to the invention.
  • This embodiment comprises a clamping member for clamping a pipe part to be widened.
  • the clamping member is formed by two clamping jaws 2 and 3 which are located opposite to and at a distance from one another.
  • the clamping jaws 2 and 3 will generally be in the form of a half shell in cross section, so that together they engage over substantially the entire circumference of the pipe part to be widened.
  • the clamping jaws 2 and 3 are each mounted at the end of an elongate bar 4 or 5, respectively. Approximately at their centre, the bars 4 and 5 are rotatably connected, at rotation points (pivot points) 6 and 7, to a common, bar-like first support 8, which is at right angles to the bars 4 and 5.
  • the bars 4 and 5 are provided with surfaces 9 and 10 which are located opposite one another and slope towards one another in the direction of the clamping jaws 2 and 3. These inclined surfaces 9 and 10 merge into surfaces 11 and 12 which run parallel to the longitudinal direction of the bars 4 and 5. As the inclined surfaces 9 and 10 move away from one another, the clamping jaws 2 and 3 move towards one another.
  • a mandrel 13 for widening an end portion of a pipe part (not shown) which has been clamped securely in place by the clamping jaws 2 and 3.
  • the mandrel 13 is directed towards the clamping jaws 2 and 3 and can be displaced towards and away from the clamping jaws 2 and 3 in the axial direction.
  • the mandrel 13 is mounted fixedly on an axial bar 14 which, in turn, is connected to a bar-like second support 15 which is substantially parallel to the first support 8.
  • Guide elements, in the form of rollers 16 and 17, are mounted on the second support 15, which rollers are able to interact with the inclined surfaces 9 and 10 and their adjoining surfaces 11 and 12.
  • the bar-like supports 8 and 15 can be moved towards and away from one another by means of an actuating member, which is arranged between the supports 8 and 15, in the form of a scissor mechanism.
  • the scissor mechanism comprises two levers 20 and 21 which are rotatably connected to one another at a rotation point 19. The ends of the levers 20 and 21 are rotatably connected, at the rotation points 22 and 23, to the supports 8 and 15. Furthermore, the levers are provided with projections 24 and 25 which are arranged at the same distance from the rotation point 19 as the rotation points 22 and 23, but on the other side of the rotation point 19.
  • the projections 24 and 25 act as a supporting means for the free ends of the supports 15 and 8. This ensures that the supports 15 and 18 remain parallel to one another when the scissor mechanism is actuated.
  • the free ends of the levers 20 and 21 are provided with handles 26 and 27, by means of which the levers can easily be gripped.
  • the pipe part to be widened is placed between the clamping jaws 2 and 3. Then, the levers 20 and 21 are moved manually towards one another, with the result that the supports 8 and 15 are moved towards one another. In the process, the rollers 16 and 17 roll along the inclined surfaces 9 and 10, with the result that the clamping jaws 2 and 3 move towards one another and clamp the pipe part which has been placed between them securely in place. When the transition between the surfaces 9 and 10 and the surfaces 11 and 12 has been reached, the clamping force remains constant. Because of the supports 8 and 15 being moved towards one another, the mandrel 13 is displaced in the direction of the clamping jaws 2 and 3 and thus in the direction of the end portion, which is to be widened, of the pipe part which has been clamped securely in place. As the levers 20 and 21 are moved further towards one another, during which process the rollers 16 and 17 roll along the surfaces 11 and 12, the mandrel 13 penetrates into the end portion of the pipe part which has been clamped securely in place and widens this end portion.
  • the levers 20 and 21 are moved apart, with the result that the supports 8 and 15 are also moved apart.
  • the mandrel 13 is pulled out of the widened end portion of the pipe part and then, as the rollers 16 and 17 roll along the inclined surfaces 9 and 10, the clamping jaws move apart slightly. The pipe part can then be removed from the device.
  • Fig. 2 31 denotes a second possible embodiment of the device according to the invention.
  • This embodiment comprises a clamping member which is formed by two clamping jaws 32 and 33 which are located opposite to and at a distance from one another.
  • the clamping jaws 32 and 33 are of elongate design, although this is not necessary.
  • the clamping jaws 32 and 33 are likewise generally in the shape of a half shell in cross section.
  • the clamping jaws 32 and 33 are rotatably connected, at rotation points 34 and 35, to an end section of a first lever 36. As the clamping jaws 32 and 33 rotate with respect to the lever 36, from the position shown in Fig. 2, during which movement the clamping jaws 32 and 33 remain parallel to one another, the distance between the clamping jaws 32 and 33 will decrease.
  • a mandrel 37 which is directed towards the clamping member formed by the clamping jaws 32 and 33 is mounted on a second lever 38.
  • the second lever 38 is provided with a transverse arm 39.
  • the clamping jaw 33 is connected to this transverse arm 39 by means of a four-bar mechanism 40, in which one of the bars is formed by the clamping jaw 33 and the opposite bar is formed by the transverse arm 39.
  • a spring 33 which presses the bars 41 and 42 apart, with the result that, without external load on the four-bar mechanism 40, the distance between the bars 41 and 42 is maximal and the four-bar mechanism 40 adopts the position depicted in Fig. 2.
  • a pipe part (not shown), the end portion of which is to be widened, is placed between the clamping jaws 32 and 33.
  • the levers 36 and 38 are moved towards one another. Since the spring 43 tends to hold the four-bar mechanism 40 in the position shown in Fig. 2, the lever 36 begins to rotate, at the rotation point 35, with respect to the clamping jaw 33. This reduces the distance between the clamping jaws 32 and 33, and the pipe part which has been placed between the clamping jaws 32 and 33 is clamped securely in place by the clamping jaws 32 and 33.
  • the clamping jaws 32 and 33 When a certain clamping force has been reached, the clamping jaws 32 and 33, with the pipe part clamped securely between them, move towards the mandrel 37, counter to the action of the spring 43. As the levers 36 and 38 move further towards one another, the mandrel 37 penetrates into the end portion, which is to be widened, of the pipe part and widens this end portion. In order to be able to follow the sideways movement of the clamping jaws 32 and 33 which results from the movement of the four-bar mechanism 40, the mandrel 37 can be displaced along the lever 38.
  • the levers 36 and 38 are moved apart. In the process, firstly the clamping jaws 32 and 33 move apart and loose their clamping action, and then the four-bar mechanism 40 moves into the position shown in Fig. 2 under the influence of the spring 43. As the levers 36 and 38 move further apart, the clamping jaws 32 and 33 move back towards one another and again clamp the pipe part securely in place. As the levers 36 and 38 move still further apart, the widened end portion of the pipe part which has been clamped securely in place by the clamping jaws 32 and 33 is pulled off the mandrel 37.
  • the clamping blocks 2 and 3 and 32 and 33 may be provided with rubber in order to improve the clamping action.
  • the clamping jaws may also be designed as metal shells which are provided on the inner side with teeth or other means for roughening the surface.
  • FIG. 3 51 denotes a third possible embodiment of the device according to the invention.
  • This embodiment comprises a clamping member which is formed by two clamping jaws 52 and 53 which are located opposite to and at a distance from one another.
  • the clamping jaws 52 and 53 like the clamping jaws of the embodiments shown in Figs. 1 and 2, will generally be in the form of a half shell in cross section.
  • the clamping jaw 52 is mounted at the free end 54 of the horizontal limb 55 of a L-shaped first lever 56.
  • the clamping jaw 53 is mounted at the free end 57 of a clamping-jaw bar 58 which, between the free end 57 and the other free end 59, is rotatably connected, at a rotation point 60, to the vertical limb 61 of the L-shaped first lever 56.
  • the clamping jaws 52 and 53 can be moved towards and away from one another.
  • a mandrel 62 for widening an end portion of a pipe part (not shown in Fig.
  • the mandrel 62 is directed towards the clamping jaws 52 and 53 and can be displaced towards and away from the clamping jaws 52 and 53 in the axial direction.
  • the mandrel 62 is mounted fixedly on the end of a mandrel bar 63 which is supported by the vertical limb 61 of the L-shaped first lever 56 and can be displaced in the axial direction with respect to this limb.
  • That end portion 64 of the mandrel bar 63 which is located at a distance from the mandrel 62 is provided with a block 65 which can be displaced over a limited distance with respect to the mandrel bar 63. This distance is determined by the length of a slot 66 which is arranged in the end portion 64 of the mandrel bar 63 and through which a pin 67, which is connected to the block 65, extends.
  • the block 65 is provided with an inclined surface 68 and an adjoining surface 69 which runs parallel to the mandrel bar 63. Both surfaces 68 and 69 are able to interact with the free end 59 of the mandrel bar 58.
  • the block 65 can be displaced by means of an actuating member in the form of a second lever 70 which, at one end 71, is rotatably connected, via a connection piece 72, to the L-shaped first lever 56, specifically at the location of the transition between the limb 55 and the limb 61. Since the connection piece 72 is rotatably connected to both the lever 70 and the lever 56, the free end 71 of the lever 70 can also be displaced with respect to the lever 56.
  • the second lever 70 at a distance from the free end 71, is rotatably connected to the block 65.
  • Fig. 4 shows the starting position.
  • the device is arranged over an end portion 81, which is to be widened, of a pipe part 82, the mandrel 62 being placed against the end of the pipe part 82, and the vertical limb 61 of the L-shaped lever 56 and the lever 70 being as far apart from one another as possible.
  • the clamping jaws 52 and 53 are likewise as far apart as possible.
  • the lever 70 In order to widen the end portion 81 of the pipe part 82, the lever 70 is moved towards the limb 61, the limb 61 remaining in the same position. The movement of the lever 70 will cause the block 65 to move along the mandrel bar 63 towards the mandrel 62. In the process, the inclined surface 68 of the block 65 moves along the free end 59 of the lever bar 58, which as a result rotates. As a result, the clamping jaw 53 moves towards the clamping jaw 52. When the free end 59 of the clamping-jaw bar 58 moves into the vicinity of the transition between the inclined surface 68 and the parallel surface 69, the clamping jaw 53 comes into contact with the pipe part 82.
  • the mandrel bar 63 is advanced by the pin 67, and the mandrel 62 is moved to the right, as seen in the drawing, and is pressed into the end portion 81, which is to be widened, of the pipe part 82, as shown in Fig. 7.
  • the end portion 81 is widened.
  • the end portion 59 of the clamping-jaw bar 58 continues to bear against the parallel surface 69, with the result that the pipe part 82 remains clamped securely in place between the clamping jaws 52 and 53.
  • the lever 70 In order to pull the mandrel back out of the widened end portion 81, the lever 70 is moved away from the limb 61 again, the pin 67, after it has moved through the slot 66, again pulling the mandrel bar 63 with it.
  • FIG. 3 The embodiment shown in Fig. 3 is particularly suitable for use at locations where the end portion 82 which is to be widened is difficult to reach or where this end portion 82 is located directly at a wall.
  • Figs. 1 to 3 may also be designed differently.
  • clamping-jaw supports 4 and 5 it is not necessary for the clamping-jaw supports 4 and 5 to be designed as bars. They may also be of different form. Furthermore, there are other possibilities for moving the supports 8 and 15 towards and away from one another, for example by means of a hydraulic or pneumatic cylinder which is arranged between the supports 8 and 15.
  • the clamping jaw 33 may also be designed in such a manner that it can be displaced along a guide which is attached to the arm 39, a spring, which tends to move the mandrel 37 and the clamping jaws 32 and 33 away from one another, being arranged between the clamping jaw 33 and the arm 38.
  • the mandrel 37 may then be mounted fixedly on the lever 38.
  • a hydraulic or pneumatic cylinder may be used instead of the lever 70 to displace the block 65, in order to actuate the device.
  • the various components may also have different forms from those shown.
  • the device according to the invention is intended in particular for widening the end portion of plastic pipe parts.
  • the device is also suitable for widening an end portion of pipe parts made from other materials which can be deformed with relatively little force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP99202696A 1998-08-21 1999-08-19 Vorrichtung zum Ausweiten eines Rohrendes Withdrawn EP0982086A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1009923 1998-08-21
NL1009923A NL1009923C8 (nl) 1998-08-21 1998-08-21 Inrichting voor het verwijderen van een eindgedeelte van een buisdeel.

Publications (1)

Publication Number Publication Date
EP0982086A1 true EP0982086A1 (de) 2000-03-01

Family

ID=19767694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99202696A Withdrawn EP0982086A1 (de) 1998-08-21 1999-08-19 Vorrichtung zum Ausweiten eines Rohrendes

Country Status (2)

Country Link
EP (1) EP0982086A1 (de)
NL (1) NL1009923C8 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007030870B3 (de) * 2007-07-03 2008-10-09 Bernhard Wagner Vorrichtung zum Verformen des Endes eines Rohres

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723703A (en) * 1952-08-12 1955-11-15 American District Telegraph Co Pivoted flaring tool with tube gripping means
US2807305A (en) * 1955-05-23 1957-09-24 Bernie R Gugel Tube end flaring hand tool
DE2062303A1 (de) * 1970-12-17 1972-05-25 Geiger, Siegfried, 8000 München Einrichtung zur Herstellung von geflanschten Schlauchverbindungen
FR2550722A1 (fr) * 1983-08-17 1985-02-22 Kulker Sa Pince manuelle, notamment pour l'assemblage de dispositifs d'irrigation goutte a goutte
WO1993011889A1 (en) * 1991-12-09 1993-06-24 Tapkoel V.O.F. Hand-tool for widening a pipe end and pipe coupling making use of such a widened pipe end

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723703A (en) * 1952-08-12 1955-11-15 American District Telegraph Co Pivoted flaring tool with tube gripping means
US2807305A (en) * 1955-05-23 1957-09-24 Bernie R Gugel Tube end flaring hand tool
DE2062303A1 (de) * 1970-12-17 1972-05-25 Geiger, Siegfried, 8000 München Einrichtung zur Herstellung von geflanschten Schlauchverbindungen
FR2550722A1 (fr) * 1983-08-17 1985-02-22 Kulker Sa Pince manuelle, notamment pour l'assemblage de dispositifs d'irrigation goutte a goutte
WO1993011889A1 (en) * 1991-12-09 1993-06-24 Tapkoel V.O.F. Hand-tool for widening a pipe end and pipe coupling making use of such a widened pipe end

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007030870B3 (de) * 2007-07-03 2008-10-09 Bernhard Wagner Vorrichtung zum Verformen des Endes eines Rohres
EP2011581A2 (de) 2007-07-03 2009-01-07 Bernhard Wagner Vorrichtung zum Verformen des Endes eines Rohres
EP2011581A3 (de) * 2007-07-03 2011-07-27 Bernhard Wagner Vorrichtung zum Verformen des Endes eines Rohres

Also Published As

Publication number Publication date
NL1009923C8 (nl) 2002-12-05
NL1009923C2 (nl) 2000-02-22

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