EP0809552B1 - Headforming machine for expanding tube ends - Google Patents

Headforming machine for expanding tube ends Download PDF

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Publication number
EP0809552B1
EP0809552B1 EP96903084A EP96903084A EP0809552B1 EP 0809552 B1 EP0809552 B1 EP 0809552B1 EP 96903084 A EP96903084 A EP 96903084A EP 96903084 A EP96903084 A EP 96903084A EP 0809552 B1 EP0809552 B1 EP 0809552B1
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EP
European Patent Office
Prior art keywords
machine
tube
accordance
block
actuator
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EP96903084A
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German (de)
French (fr)
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EP0809552A1 (en
Inventor
Bernard Anthoine
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Parker Hannifin SA
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Parker Hannifin SA
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    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
    • 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 present invention relates to a flare ends of tubes by rolling according to the preamble of claim 1 which is based on document FR-A-2 660 219.
  • connection tight rigid tubes at the different orifices of installation devices is usually performed at using collar fittings.
  • These fittings have a internally shouldered nut and engaged on the tube to connect, at the end of which a collar is fitted.
  • the shouldered nut is mounted captive on the tube and can be screwed onto a threaded end piece orifice of a device.
  • a seal can be placed between the end of the tube and the device to perfect sealing.
  • the collar can for example be brazed on the end of the tube.
  • the collar and the end of the tube must be cleaned. This cleaning increases the time required to making the fitting and making the operation more expensive.
  • the document FR 2 642 500 describes a method of realization of a fitting, according to which the collar of the tube is made by gluing. This process allows make a connection quickly and economically.
  • Document US 3,610,016 describes a machine to flare the end of a tube.
  • This machine presents a base on which are mounted, on the one hand, a fixed assembly comprising two jaws intended for receive the flare tube and on the other hand, a set movable in translation towards the jaws comprising a tool and moved by an attached jack.
  • the tool of this mobile assembly is rotated around an axis parallel to the axis of movement of the assembly mobile and is therefore animated by a cylindrical movement.
  • a motor placed for example under the base of the machine, provides the energy necessary for the proper functioning of this one.
  • the document EP 0 462 719 describes a flare hot tubes.
  • This machine is intended for be used in the field of oil exploration at sea. It has a base formed by two plates end connected by four parallel tubes, one mobile carriage slidingly mounted on the four tubes, one tool driven in rotation about an axis parallel to tubes and mounted on the mobile carriage, means for hold the tube to be flared, as well as means for move the cart.
  • the object of the invention is then to provide a machine for flaring ends of tubes by cold rolling, especially for making fittings with collar, the structure of which is simple, so that this machine can be space-saving and easily transportable.
  • this machine is simple and allows to make a compact machine.
  • the second fixed block incorporates part of the means to bring the snap on the end of the flare tube.
  • this hydraulic cylinder is supplied by a hydraulic pump mounted on the mobile unit.
  • the invention provides a way to achieve using space-saving means.
  • the snap is mounted in a spindle, itself mounted by means of bearings in a support spindle rotated by means training in an orbital movement of the snap, the axis of the head and its pin forming an angle with the axis of rotation of the spindle support, allowing thus to animate the snap of an orbital movement.
  • the snap, the pin and its support are mounted one inside the other.
  • the length of the whole set is then hardly more important than that of the support of brooch.
  • the drive means in a orbital motion of the dowel include a motor whose output shaft, fitted with a pulley, is connected to the spindle support by a belt.
  • the motor can be find above, below or at the height of all to train.
  • the pump hydraulic powering the hydraulic cylinder has a piston on which an eccentric mounted on the end acts the axis of rotation of the spindle support.
  • the spindle holder then activates the pump hydraulic thanks to the eccentric.
  • the means of training in an orbital movement also entail the hydraulic pump and therefore also bring the chuck closer to the end of the tube.
  • One motor can therefore suffice for these two movements.
  • the hydraulic pump supplies the hydraulic cylinder from inside the cylinder piston, we thus finds one after the other, the support of the spindle, the hydraulic pump and the cylinder.
  • the movable block comprises at minus an abutment finger intended to come into abutment at the end of race against a jaw tightening the end of the tube and the machine has a pressure switch connected to the cylinder and controlling a solenoid valve, so that, when the pressure in the cylinder chamber is too high high, the cylinder chamber is connected to a oil tank.
  • the training means allowing to animate the snap of an orbital motion include an electric motor whose power is cut off when the pressure switch actuates the solenoid valve. The machine stops then automatic at the end of the cycle.
  • the invention then also provides a device for connecting the chamber of the cylinder with an oil tank, this device comprising a calibrated valve opening when the pressure in the cylinder chamber exceeds a predetermined value and a drawer one end of which is placed in communication with the cylinder chamber when the valve is open and ordering the opening of a passage between the room of the cylinder and oil tank.
  • the means for guiding the block in translation mobile they advantageously have two columns connecting the two fixed blocks. These two columns allow good guidance and stiffen the whole machine.
  • means to bring the snap on the end of the tube have been described. These means include a hydraulic cylinder. To distance the bolt at the end of the tube, the cylinder described could be replaced by a double-acting cylinder. Preferably, however, the means to distance the snap on the end of the flare tube have compression springs placed between the first fixed block and the mobile unit.
  • the means drive to bring the chuck closer to the end of the flare tube work against springs, and when these means no longer act, the springs move the movable block away from the first fixed block.
  • the jaw holder In order to properly hold the end of the tube at flare, the jaw holder has a tail shape dovetail in which the two jaws of form complementary come to engage, so that, by wedge effect, when the snap rests against the end of the tube, the two jaws tend to move closer to each other, tightening the tube.
  • the first fixed block has a shoe which, side, faces a jaw when the jaws are placed in the jaw holder and on the other hand can to be pushed towards this jaw by an eccentric operated with a lever, to bring the two together jaws of each other and so maintain the end of the tube.
  • the first fixed block comprises a movable stop against which the end of the flare tube to allow proper positioning in the bit and articulated around an axis between a first position where it faces the jaws on the side of the buttonhole and a second position where it is spread so as not to hinder the action of the snap on the end of the tube.
  • the latter comprises a lever
  • the movable unit is equipped with a cam having a surface inclined, cooperating with the lever of the movable stop, of so as to move the stopper into its separated position when the bolt goes towards the first fixed block.
  • the translational movement of the mobile unit can also be used to activate a lubrication.
  • the machine has a sprayer for spraying a lubricant, oriented towards the end of the tube to be flared and actuated mechanically when the movable unit approaches the first fixed block.
  • Figures 1 and 2 show a machine according to the invention in an overview.
  • This machine basically has three parts that can be distinguished well on these two figures: a fixed part before 1, a rear fixed part 2 and a mobile part 3 located between these two fixed parts 1,2.
  • the front fixed part 1 essentially serves to position and hold in place the end of a tube 4 to be flared, and possibly a socket shouldered 5. For this purpose, it constitutes a jaw holder in which two jaws can take place 6.
  • This jaw 6 has the shape of substantially a parallelepiped of which one face 7 is inclined.
  • the jaw holder has a tail shape dovetail.
  • the inclined face 7 of each jaw comes then against an inclined face of the jaw holder.
  • the face of each jaw 6 in contact with the other jaw has a recess intended to receive the socket 5 and the end of the tube 4. On its part intended to receive the tube, this recess is covered with carbide so to obtain a better coefficient of friction allowing thus better maintain the end of the tube 4 in position.
  • the widest side of the dovetail is located at the end of the tube 4 to be flared. So when a tool acts on this end to flare the tube, he pushes the jaws 6 and by corner effect, these tighten so that they better hold the end of the tube 4.
  • the front fixed part 1 is provided with a stop 8 mobile, articulated around an axis of rotation.
  • the stop 8 is placed facing the recess made in the jaws 6 for receive the end of the tube 4. The latter is then slipped between the two jaws 6 which are not tight until it comes into abutment against the movable stop 8.
  • a pre-locking device is fitted to the front unit 1 of the machine. It has a shoe 9 which, on one side, faces a jaw 6 placed in the jaw holder and, on the other hand, can be pushed towards this jaw 6 by an eccentric 10 actuated using a lever 11. When the lever 11 is actuated to push the shoe 9, the jaw 6 pushed closer to the other jaw 6, thus allowing the end of the tube 4 to be clamped in the bit.
  • the front fixed part 1 described above is connected to the rear fixed part 2 by two columns 12 parallel which serve as a guide in translation to the part mobile 3.
  • the mobile part 3 is mounted via four bearings 13 on the two columns 12 connecting the fixed blocks front 1 and rear 2. It includes a flange 14 which constitutes the tool used for flaring the end of the tube 4, a pin 15 in which is mounted the bolt 14, a spindle support 16 and a electric motor 17 driving the spindle support 16 rotation via a belt 18 and a pulley 19 mounted on the motor output shaft 17.
  • the spindle support 16 is mounted in a housing 20 by means of ball bearings 21.
  • the axis of this support 16 is parallel to the columns 12 and therefore to the direction of movement of the movable block 3.
  • the spindle support 16 On the side facing the jaw holder, the spindle support 16 has a recess serving as a housing for pin 15. This last is mounted via a socket needles 22 and a thrust ball bearing 23 in the recess of the spindle holder.
  • the spindle axis 15 mounted in its support 16 is inclined a few degrees relative to to the axis of the spindle support 16.
  • the dowel 14 is housed in the spindle 15, parallel to the axis of spindle 15. It is therefore inclined relative to the axis of the spindle support 16.
  • the electric motor 17 is mounted parallel to the axis of the spindle support 16 on the housing 20.
  • the belt 18 drives the spindle support 16 in rotation and thanks to the inclination of the axis of the dowel 14 and from its spindle 15, the snap 14 is driven by a orbital motion.
  • a cover closes the housing 20, which serves support for a hydraulic pump 25.
  • the latter comprises a piston 26, an inlet valve 27 and a outlet valve 28.
  • the piston 26 is driven in a going movement and comes by an eccentric 29 mounted on the support of spindle 16 opposite to the dowel 14 and housed in a recess made in the cover 24.
  • the pump 25 is supplied with oil by a pipe hose 30 connected to an oil tank 31. The latter takes place in the rear fixed part 2 of the machine.
  • This pump 25 supplies a hydraulic cylinder.
  • the body of this cylinder is integrated into the rear fixed block 2, the chamber of this cylinder is constituted by a blind bore 32 made in the rear block 2 and the piston 33 of this cylinder is integral with the cover 24 of the housing 20.
  • the oil supply to the cylinder is through a channel 34 drilled in the cover 24 and the piston 33 and connecting the pump outlet to the cylinder chamber.
  • the machine stops automatically and is described below.
  • the movable block 3 On the side of the bolt 14, the movable block 3 has two fingers 35 serving as mechanical stops. Each jaw 6 has a milled surface 36 making facing a finger 35. This surface 36 is placed in such a way so that a finger 35 abuts against it when the end of the tube 4 is flared.
  • springs 39 arranged between the front fixed block 1 and the movable part 3 surround the two columns 12.
  • two spacers 40 arranged around the springs 39 are provided to limit the travel of the moving part. So, if the motor 17 is started inadvertently then there is no jaw 6 in the jaw holder, the movable block 3 abuts with spacers 40 and the pressure switch 37 controls the return of the mobile part 3.
  • the pressure switch 37 can control not only the solenoid valve 38, but also the supply of the motor 17. So when the pressure becomes too great, the engine 17 is stopped.
  • FIG. 3 shows in section a valve 41 having functions similar to those of pressure switch 37 and the solenoid valve 38.
  • This valve 41 is connected by its input 42 to the chamber 32 of the jack and via its outlet 47 to the reservoir 31. It includes a calibrated valve 43 and a drawer 44.
  • the calibrated valve 43 opens and puts the cylinder chamber in connection with a chamber 46 located at one end of drawer 44. The latter is then pushed under the pressure and slides into a position where the inlet 42 is linked to the outlet 47, that is to say that the chamber 32 of the jack is connected to the tank 31.
  • a latching system comprising a ball 48, a spring 49 and a notch 50 produced on a rod 51 integral with the drawer 44 is provided.
  • This valve 41 can in particular be used when the machine described above is placed in a dangerous atmosphere with risk of explosion. Engine electric 17 is then replaced by a pneumatic motor for example and the machine can operate without doing spark.
  • Figure 4 shows a device for automatically raise the movable stop 8 necessary to the positioning of the end of the tube 4 when the block mobile 3 approaches the front fixed part 1.
  • the device comprises a lifting cam 52 mounted on the movable block 3.
  • This cam 52 has a inclined surface which cooperates with a lever integral with the movable stop 8, so that when the block mobile 3 advances towards the front fixed part 1, the stop mobile 3 deviates from the position where it allows the correct positioning of the end of the tube 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Extraction Processes (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Jigs For Machine Tools (AREA)
  • Actuator (AREA)
  • Automatic Assembly (AREA)
  • Forging (AREA)

Abstract

A machine including a die (14) mounted in a holder, two jaws (6) forming a clamping jaw for holding one end of the tube (4) to be expanded, drive means (17, 18) for imparting orbital motion to the die, drive means (25) for moving the die towards the end of the tube (4), and means for moving it away therefrom. To achieve a simple structure and render said machine compact and easily transportable, the jaws (6) are arranged in a fixed jaw holder forming a first block (1). A second fixed block (2) is placed opposite the first block and a movable block (3) including the die (14), the die holder and the die drive means (17) has guide means (12) interconnecting the two fixed blocks and is translated by a hydraulic cylinder in the second fixed block (2).

Description

La présente invention concerne une machine à évaser des extrémités de tubes par bouterollage selon le préambule de la revendication 1 qui est basé sur le document FR-A-2 660 219.The present invention relates to a flare ends of tubes by rolling according to the preamble of claim 1 which is based on document FR-A-2 660 219.

Dans les installations de transport de fluides sous pression, hydrauliques ou pneumatiques, la liaison étanche des tubes rigides aux différents orifices des appareils de l'installation est généralement réalisée à l'aide de raccords à collet. Ces raccords comportent un écrou épaulé intérieurement et engagé sur le tube à raccorder, à l'extrémité duquel est aménagé un collet. Ainsi, l'écrou épaulé est monté imperdable sur le tube et peut être vissé sur un embout fileté solidaire d'un orifice d'un appareil. Un joint d'étanchéité peut être placé entre l'extrémité du tube et l'appareil pour parfaire l'étanchéité.In fluids transport facilities under pressure, hydraulic or pneumatic, the connection tight rigid tubes at the different orifices of installation devices is usually performed at using collar fittings. These fittings have a internally shouldered nut and engaged on the tube to connect, at the end of which a collar is fitted. Thus, the shouldered nut is mounted captive on the tube and can be screwed onto a threaded end piece orifice of a device. A seal can be placed between the end of the tube and the device to perfect sealing.

Il existe plusieurs façons pour aménager un collet à l'extrémité d'un tube. Le collet peut par exemple être brasé sur l'extrémité du tube. Pour obtenir une brasure de bonne qualité, le collet et l'extrémité du tube doivent être nettoyés. Ce nettoyage augmente le temps nécessaire à la réalisation du raccord et renchérit l'opération.There are several ways to arrange a collar at the end of a tube. The collar can for example be brazed on the end of the tube. To obtain a solder good quality, the collar and the end of the tube must be cleaned. This cleaning increases the time required to making the fitting and making the operation more expensive.

Il est également connu de réaliser un collet battu. Ce dernier est alors obtenu par la frappe de l'extrémité du tube préalablement placée dans une matrice, à l'aide d'une gamme d'outils calibrés permettant de déformer progressivement l'extrémité du tube jusqu'à l'obtention d'un collet.It is also known to make a collar beaten. The latter is then obtained by typing the end of the tube previously placed in a matrix, using a range of calibrated tools to gradually deform the end of the tube until obtaining a collar.

Le temps et le coût de réalisation d'un tel collet sont élevés.The time and cost of making such a collar are high.

Le document FR 2 642 500 décrit un procédé de réalisation d'un raccord, selon lequel le collet du tube est réalisé par bouterollage. Ce procédé permet de réaliser un raccord rapidement et de façon économique.The document FR 2 642 500 describes a method of realization of a fitting, according to which the collar of the tube is made by gluing. This process allows make a connection quickly and economically.

Il existe des machines pour mettre en oeuvre ce procédé, telle que celle décrite par exemple dans ledit document FR 2 660 219. Ces machines comportent deux mâchoires formant un mors dans lequel est placée l'extrémité du tube à raccorder, une bouterolle et des moyens pour animer cette dernière d'un mouvement orbital.There are machines to implement this process, such as that described for example in said document FR 2 660 219. These machines include two jaws forming a jaw in which is placed the end of the tube to be connected, a snap and means to animate the latter with an orbital movement.

Le document US 3 610 016 décrit une machine permettant d'évaser l'extrémité d'un tube. Cette machine présente une base sur laquelle sont montés, d'une part, un ensemble fixe comportant deux mâchoires destinées à recevoir le tube à évaser et d'autre part, un ensemble mobile en translation en direction des mâchoires comportant un outil et mû par un vérin rapporté. L'outil de cet ensemble mobile est entraíné en rotation autour d'un axe parallèle à l'axe de déplacement de l'ensemble mobile et est donc animé d'un mouvement cylindrique. Un moteur, placé par exemple sous la base de la machine, fournit l'énergie nécessaire au bon fonctionnement de celle-ci.Document US 3,610,016 describes a machine to flare the end of a tube. This machine presents a base on which are mounted, on the one hand, a fixed assembly comprising two jaws intended for receive the flare tube and on the other hand, a set movable in translation towards the jaws comprising a tool and moved by an attached jack. The tool of this mobile assembly is rotated around an axis parallel to the axis of movement of the assembly mobile and is therefore animated by a cylindrical movement. A motor, placed for example under the base of the machine, provides the energy necessary for the proper functioning of this one.

Le document EP 0 462 719 décrit une machine à évaser des tubes à chaud. Cette machine est destinée à être utilisée dans le domaine de la prospection pétrolière en mer. Elle comporte une base formée de deux plaques d'extrémité reliées par quatre tubes parallèles, un chariot mobile monté coulissant sur les quatre tubes, un outil entraíné en rotation autour d'un axe parallèle aux tubes et monté sur le chariot mobile, des moyens pour maintenir le tube à évaser, ainsi que des moyens pour déplacer le chariot.The document EP 0 462 719 describes a flare hot tubes. This machine is intended for be used in the field of oil exploration at sea. It has a base formed by two plates end connected by four parallel tubes, one mobile carriage slidingly mounted on the four tubes, one tool driven in rotation about an axis parallel to tubes and mounted on the mobile carriage, means for hold the tube to be flared, as well as means for move the cart.

La structure des machines connues en fait des machines lourdes, volumineuses et peu transportables. De plus, la plupart d'entre elles ne permettent pas un mouvement orbital de l'outil. Or il est souvent utile, lors de la mise en place d'une installation hydraulique ou pneumatique, de réaliser sur le site des raccords de tuyaux sur l'un ou l'autre appareil de l'installation. Ces raccords doivent alors être commandés et fabriqués en usine, ce qui impose des délais de quelques jours. The structure of known machines makes them heavy, bulky and not very transportable machines. Of more, most of them do not allow a tool orbital motion. Now it is often useful, during the installation of a hydraulic installation or pneumatic, to make on-site fittings for pipes on either device of the installation. These fittings must then be ordered and manufactured in factory, which imposes deadlines of a few days.

Le but de l'invention est alors de fournir une machine permettant d'évaser des extrémités de tubes par bouterollage à froid, notamment pour réaliser des raccords à collet, dont la structure est simple, de telle sorte que cette machine puisse être peu encombrante et facilement transportable.The object of the invention is then to provide a machine for flaring ends of tubes by cold rolling, especially for making fittings with collar, the structure of which is simple, so that this machine can be space-saving and easily transportable.

Ce but est atteint, selon l'invention, par une machine avec les caractéristiques de la revendication 1.This object is achieved, according to the invention, by a machine with the Features of claim 1.

La structure de cette machine est simple et permet de réaliser une machine compacte. Le second bloc fixe intègre une partie des moyens permettant de rapprocher la bouterolle de l' extrémité du tube à évaser. Avantageusement, ce vérin hydraulique est alimenté par une pompe hydraulique montée sur le bloc mobile.The structure of this machine is simple and allows to make a compact machine. The second fixed block incorporates part of the means to bring the snap on the end of the flare tube. Advantageously, this hydraulic cylinder is supplied by a hydraulic pump mounted on the mobile unit.

Il existe plusieurs façons d'animer une bouterolle d'un mouvement orbital. Par exemple, l'invention propose une façon d'y parvenir mettant en oeuvre des moyens peu encombrants. Ainsi, la bouterolle est montée dans une broche, elle-même montée par l'intermédiaire de roulements dans un support de broche entraíné en rotation par les moyens d'entraínement dans un mouvement orbital de la bouterolle, l'axe de la bouterolle et de sa broche formant un angle avec l'axe de rotation du support de broche, permettant ainsi d'animer la bouterolle d'un mouvement orbital.There are several ways to animate a daisy chain of an orbital motion. For example, the invention provides a way to achieve using space-saving means. Thus, the snap is mounted in a spindle, itself mounted by means of bearings in a support spindle rotated by means training in an orbital movement of the snap, the axis of the head and its pin forming an angle with the axis of rotation of the spindle support, allowing thus to animate the snap of an orbital movement.

La bouterolle, la broche et son support sont montés l'un dans l'autre. La longueur de tout l'ensemble est alors à peine plus importante que celle du support de broche.The snap, the pin and its support are mounted one inside the other. The length of the whole set is then hardly more important than that of the support of brooch.

Afin de pouvoir placer en parallèle, l'un à côté de l'autre, d'une part la bouterolle, la broche et son support et d'autre part leurs moyens d'entraínement, avantageusement, les moyens d'entraínement dans un mouvement orbital de la bouterolle comprennent un moteur dont l'arbre de sortie, muni d'une poulie, est relié au support de broche par une courroie.In order to be able to place in parallel, one next on the other, on the one hand the chisel, the brooch and its support and on the other hand their means of training, advantageously, the drive means in a orbital motion of the dowel include a motor whose output shaft, fitted with a pulley, is connected to the spindle support by a belt.

Selon l'espace disponible, le moteur peut se trouver au-dessus, au-dessous ou bien à la hauteur de l'ensemble à entraíner.Depending on the space available, the motor can be find above, below or at the height of all to train.

Dans un mode de réalisation préféré, la pompe hydraulique alimentant le vérin hydraulique comporte un piston sur lequel agit un excentrique monté à l'extrémité de l'axe de rotation du support de broche.In a preferred embodiment, the pump hydraulic powering the hydraulic cylinder has a piston on which an eccentric mounted on the end acts the axis of rotation of the spindle support.

Le support de broche actionne alors la pompe hydraulique grâce à l'excentrique. Dans ce cas les moyens d'entraínement dans un mouvement orbital entraínent aussi la pompe hydraulique et de ce fait permettent également de rapprocher la bouterolle de l'extrémité du tube. Un seul moteur peut donc suffire pour ces deux mouvements.The spindle holder then activates the pump hydraulic thanks to the eccentric. In this case the means of training in an orbital movement also entail the hydraulic pump and therefore also bring the chuck closer to the end of the tube. One motor can therefore suffice for these two movements.

Avantageusement, la pompe hydraulique alimente le vérin hydraulique par l'intérieur du piston du vérin, on retrouve ainsi l'un à la suite de l'autre, le support de la broche, la pompe hydraulique et le vérin.Advantageously, the hydraulic pump supplies the hydraulic cylinder from inside the cylinder piston, we thus finds one after the other, the support of the spindle, the hydraulic pump and the cylinder.

Pour commander l'arrêt du bouterollage lorsque l'extrémité du tube est évasée, le bloc mobile comporte au moins un doigt de butée destiné à venir en butée en fin de course contre une mâchoire serrant l'extrémité du tube et la machine comporte un pressostat relié à la chambre de vérin et commandant une électrovanne, de telle sorte que, lorsque la pression dans la chambre de vérin est trop élevée, la chambre du vérin est mise en liaison avec un réservoir d'huile.To control the stop of the rolling when the end of the tube is flared, the movable block comprises at minus an abutment finger intended to come into abutment at the end of race against a jaw tightening the end of the tube and the machine has a pressure switch connected to the cylinder and controlling a solenoid valve, so that, when the pressure in the cylinder chamber is too high high, the cylinder chamber is connected to a oil tank.

Dans cette configuration, avantageusement, les moyens d'entraínement permettant d'animer la bouterolle d'un mouvement orbital comportent un moteur électrique dont l'alimentation est coupée lorsque le pressostat actionne l'électrovanne. L'arrêt de la machine est alors automatique en fin de cycle.In this configuration, advantageously, the training means allowing to animate the snap of an orbital motion include an electric motor whose power is cut off when the pressure switch actuates the solenoid valve. The machine stops then automatic at the end of the cycle.

Il est également possible de réaliser l'arrêt du bouterollage sans pressostat. Ce dernier présente l'inconvénient d'être un appareil électrique qui ne peut être utilisé dans un endroit où règne un risque d'explosion. L'invention fournit alors également un dispositif permettant de mettre en liaison la chambre du vérin avec un réservoir d'huile, ce dispositif comportant une soupape tarée s'ouvrant lorsque la pression dans la chambre du vérin dépasse une valeur prédéterminée et un tiroir dont une extrémité est mise en communication avec la chambre du vérin lorsque la soupape est ouverte et commandant l'ouverture d'un passage entre la chambre du vérin et le réservoir d'huile.It is also possible to stop the buttoning without pressure switch. The latter presents the downside of being an electrical device that cannot be used in a risky location explosion. The invention then also provides a device for connecting the chamber of the cylinder with an oil tank, this device comprising a calibrated valve opening when the pressure in the cylinder chamber exceeds a predetermined value and a drawer one end of which is placed in communication with the cylinder chamber when the valve is open and ordering the opening of a passage between the room of the cylinder and oil tank.

Quant aux moyens de guidage en translation du bloc mobile, ils comportent avantageusement deux colonnes reliant les deux blocs fixes. Ces deux colonnes permettent un bon guidage et rigidifient l'ensemble de la machine.As for the means for guiding the block in translation mobile, they advantageously have two columns connecting the two fixed blocks. These two columns allow good guidance and stiffen the whole machine.

Plus haut, des moyens permettant de rapprocher la bouterolle de l'extrémité du tube ont été décrits. Ces moyens comportent un vérin hydraulique. Pour éloigner la bouterolle de l'extrémité du tube, le vérin décrit pourrait être remplacé par un vérin à double effet. Cependant, de préférence, les moyens pour éloigner la bouterolle de l'extrémité du tube à évaser comportent des ressorts de compression placés entre le premier bloc fixe et le bloc mobile.Above, means to bring the snap on the end of the tube have been described. These means include a hydraulic cylinder. To distance the bolt at the end of the tube, the cylinder described could be replaced by a double-acting cylinder. Preferably, however, the means to distance the snap on the end of the flare tube have compression springs placed between the first fixed block and the mobile unit.

Dans cette tonne de réalisation, les moyens d'entraínement permettant de rapprocher la bouterolle de l'extrémité du tube à évaser travaillent à l'encontre des ressorts, et lorsque ces moyens n'agissent plus, les ressorts éloignent le bloc mobile du premier bloc fixe.In this ton of achievement, the means drive to bring the chuck closer to the end of the flare tube work against springs, and when these means no longer act, the springs move the movable block away from the first fixed block.

Afin de bien maintenir l'extrémité du tube à évaser, le porte-mâchoires présente une forme en queue d'aronde dans laquelle les deux mâchoires de forme complémentaire viennent s'engager, de telle sorte que, par effet de coin, lorsque la bouterolle vient en appui contre l'extrémité du tube, les deux mâchoires ont tendance à se rapprocher l'une de l'autre, serrant ainsi le tube.In order to properly hold the end of the tube at flare, the jaw holder has a tail shape dovetail in which the two jaws of form complementary come to engage, so that, by wedge effect, when the snap rests against the end of the tube, the two jaws tend to move closer to each other, tightening the tube.

Pour réaliser un pré-serrage de l'extrémité du tube, le premier bloc fixe comporte un sabot qui, d'un côté, fait face à une mâchoire lorsque les mâchoires sont placées dans le porte-mâchoires et, d'un autre côté peut être poussé vers cette mâchoire par un excentrique actionné à l'aide d'un levier, afin de rapprocher les deux mâchoires l'une de l'autre et ainsi de maintenir l'extrémité du tube.To pre-tighten the end of the tube, the first fixed block has a shoe which, side, faces a jaw when the jaws are placed in the jaw holder and on the other hand can to be pushed towards this jaw by an eccentric operated with a lever, to bring the two together jaws of each other and so maintain the end of the tube.

Avantageusement, le premier bloc fixe comporte une butée mobile contre laquelle vient en butée l'extrémité du tube à évaser afin de permettre un bon positionnement dans le mors et articulée autour d'un axe entre une première position où elle fait face aux mâchoires du côté de la bouterolle et une seconde position où elle est écartée afin de ne pas gêner l'action de la bouterolle sur l'extrémité du tube.Advantageously, the first fixed block comprises a movable stop against which the end of the flare tube to allow proper positioning in the bit and articulated around an axis between a first position where it faces the jaws on the side of the buttonhole and a second position where it is spread so as not to hinder the action of the snap on the end of the tube.

Pour que la bouterolle ne vienne pas heurter la butée mobile, cette dernière comporte un levier, et le bloc mobile est équipé d'une came présentant une surface inclinée, coopérant avec le levier de la butée mobile, de façon à faire passer la butée dans sa position écartée lorsque la bouterolle se dirige en direction du premier bloc fixe.So that the snap does not hit the movable stop, the latter comprises a lever, and the movable unit is equipped with a cam having a surface inclined, cooperating with the lever of the movable stop, of so as to move the stopper into its separated position when the bolt goes towards the first fixed block.

Le mouvement de translation du bloc mobile peut aussi être mis à profit pour actionner un dispositif de lubrification. Dans ce cas, la machine comporte un vaporisateur destiné à vaporiser un lubrifiant, orienté vers l'extrémité du tube à évaser et actionné mécaniquement lorsque le bloc mobile se rapproche du premier bloc fixe.The translational movement of the mobile unit can also be used to activate a lubrication. In this case, the machine has a sprayer for spraying a lubricant, oriented towards the end of the tube to be flared and actuated mechanically when the movable unit approaches the first fixed block.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple une machine selon l'invention :

  • Figure 1 en est une vue en coupe longitudinale selon la ligne de coupe I-I de la figure 2 ;
  • Figure 2 est une vue de dessus partiellement en coupe ;
  • Figure 3 est une vue en coupe, à échelle agrandie, d'une vanne hydraulique pour commander l'arrêt d'une opération de bouterollage ;
  • Figure 4 est une vue en perspective, à échelle agrandie, d'un détail pouvant être adapté sur la machine représentée aux figures 1 et 2.
    • In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing, representing by way of example a machine according to the invention:
  • Figure 1 is a longitudinal sectional view along the section line II of Figure 2;
  • Figure 2 is a top view partially in section;
  • Figure 3 is a sectional view, on an enlarged scale, of a hydraulic valve for controlling the stopping of a rolling operation;
  • Figure 4 is a perspective view, on an enlarged scale, of a detail that can be adapted on the machine shown in Figures 1 and 2.

    • Les figures 1 et 2 représentent une machine selon l'invention dans une vue d'ensemble. Cette machine comporte essentiellement trois parties que l'on distingue bien sur ces deux figures : une partie fixe avant 1, une partie fixe arrière 2 et une partie mobile 3 située entre ces deux parties fixes 1,2.Figures 1 and 2 show a machine according to the invention in an overview. This machine basically has three parts that can be distinguished well on these two figures: a fixed part before 1, a rear fixed part 2 and a mobile part 3 located between these two fixed parts 1,2.

    La partie fixe avant 1 sert essentiellement à positionner et à maintenir en place l'extrémité d'un tube 4 devant être évasée, ainsi qu'éventuellement une douille épaulée 5. A cet effet, elle constitue un porte-mâchoires dans lequel peuvent venir prendre place deux mâchoires 6.The front fixed part 1 essentially serves to position and hold in place the end of a tube 4 to be flared, and possibly a socket shouldered 5. For this purpose, it constitutes a jaw holder in which two jaws can take place 6.

    Cette mâchoire 6 a la forme sensiblement d'un parallélépipède dont une face 7 est inclinée. Le porte-mâchoires présente quant à lui une forme en queue d'aronde. La face inclinée 7 de chaque mâchoire vient alors contre une face inclinée du porte-mâchoires. La face de chaque mâchoire 6 au contact de l'autre mâchoire présente un évidement destiné à recevoir la douille 5 et l'extrémité du tube 4. Sur sa partie destinée à recevoir le tube, cet évidement est recouvert de carbure afin d'obtenir un meilleur coefficient de frottement permettant ainsi de mieux maintenir l'extrémité du tube 4 en position.This jaw 6 has the shape of substantially a parallelepiped of which one face 7 is inclined. The jaw holder has a tail shape dovetail. The inclined face 7 of each jaw comes then against an inclined face of the jaw holder. The face of each jaw 6 in contact with the other jaw has a recess intended to receive the socket 5 and the end of the tube 4. On its part intended to receive the tube, this recess is covered with carbide so to obtain a better coefficient of friction allowing thus better maintain the end of the tube 4 in position.

    La face la plus large de la queue d'aronde se trouve du côté de l'extrémité du tube 4 devant être évasée. Ainsi, lorsqu'un outil agit sur cette extrémité pour évaser le tube, il pousse les mâchoires 6 et par effet de coin, celles-ci se resserrent de telle sorte qu'elles maintiennent mieux l'extrémité du tube 4.The widest side of the dovetail is located at the end of the tube 4 to be flared. So when a tool acts on this end to flare the tube, he pushes the jaws 6 and by corner effect, these tighten so that they better hold the end of the tube 4.

    Pour permettre un bon positionnement de l'extrémité du tube 4 dans les mâchoires 6 formant un mors, la partie fixe avant 1 est munie d'une butée 8 mobile, articulée autour d'un axe de rotation. Pour positionner l'extrémité du tube 4, la butée 8 est placée face à l'évidement réalisé dans les mâchoires 6 pour recevoir l'extrémité du tube 4. Cette dernière est alors glissée entre les deux mâchoires 6 qui ne sont pas serrées jusqu'à venir en butée contre la butée mobile 8.To allow proper positioning of the end of the tube 4 in the jaws 6 forming a jaw, the front fixed part 1 is provided with a stop 8 mobile, articulated around an axis of rotation. For position the end of the tube 4, the stop 8 is placed facing the recess made in the jaws 6 for receive the end of the tube 4. The latter is then slipped between the two jaws 6 which are not tight until it comes into abutment against the movable stop 8.

    Afin de maintenir l'extrémité du tube 4 dans cette position, un dispositif de préserrage équipe le bloc avant 1 de la machine. Il comporte un sabot 9 qui, d'un côté, fait face à une mâchoire 6 placée dans le porte-mâchoires et, d'un autre côté peut être poussé vers cette mâchoire 6 par un excentrique 10 actionné à l'aide d'un levier 11. Lorsque le levier 11 est actionné pour pousser le sabot 9, la mâchoire 6 poussée se rapproche de l'autre mâchoire 6, permettant ainsi de serrer l'extrémité du tube 4 dans le mors. In order to keep the end of the tube 4 in this position, a pre-locking device is fitted to the front unit 1 of the machine. It has a shoe 9 which, on one side, faces a jaw 6 placed in the jaw holder and, on the other hand, can be pushed towards this jaw 6 by an eccentric 10 actuated using a lever 11. When the lever 11 is actuated to push the shoe 9, the jaw 6 pushed closer to the other jaw 6, thus allowing the end of the tube 4 to be clamped in the bit.

    La partie fixe avant 1 décrite ci-dessus est reliée à la partie fixe arrière 2 par deux colonnes 12 parallèles qui servent de guide en translation à la partie mobile 3.The front fixed part 1 described above is connected to the rear fixed part 2 by two columns 12 parallel which serve as a guide in translation to the part mobile 3.

    La partie mobile 3 est montée par l'intermédiaire de quatre paliers 13 sur les deux colonnes 12 reliant les blocs fixes avant 1 et arrière 2. Elle comporte une bouterolle 14 qui constitue l'outil servant à évaser l'extrémité du tube 4, une broche 15 dans laquelle est montée la bouterolle 14, un support de broche 16 et un moteur électrique 17 entraínant le support de broche 16 en rotation par l'intermédiaire d'une courroie 18 et d'une poulie 19 montée sur l'arbre de sortie du moteur 17.The mobile part 3 is mounted via four bearings 13 on the two columns 12 connecting the fixed blocks front 1 and rear 2. It includes a flange 14 which constitutes the tool used for flaring the end of the tube 4, a pin 15 in which is mounted the bolt 14, a spindle support 16 and a electric motor 17 driving the spindle support 16 rotation via a belt 18 and a pulley 19 mounted on the motor output shaft 17.

    Le support de broche 16 est monté dans un boítier 20 par l'intermédiaire de roulements à billes 21. L'axe de ce support 16 est parallèle aux colonnes 12 et donc à la direction de déplacement du bloc mobile 3. Du côté faisant face au porte-mâchoires, le support de broche 16 présente un évidement servant de logement à la broche 15. Cette dernière est montée par l'intermédiaire d'une douille à aiguilles 22 et d'une butée à billes 23 dans l'évidement du support de broche. L'axe de la broche 15 montée dans son support 16 est incliné de quelques degrés par rapport à l'axe du support de broche 16.The spindle support 16 is mounted in a housing 20 by means of ball bearings 21. The axis of this support 16 is parallel to the columns 12 and therefore to the direction of movement of the movable block 3. On the side facing the jaw holder, the spindle support 16 has a recess serving as a housing for pin 15. This last is mounted via a socket needles 22 and a thrust ball bearing 23 in the recess of the spindle holder. The spindle axis 15 mounted in its support 16 is inclined a few degrees relative to to the axis of the spindle support 16.

    La bouterolle 14 est logée dans la broche 15, parallèlement à l'axe de la broche 15. Elle est donc inclinée par rapport à l'axe du support de broche 16.The dowel 14 is housed in the spindle 15, parallel to the axis of spindle 15. It is therefore inclined relative to the axis of the spindle support 16.

    Le moteur électrique 17 est monté parallèlement à l'axe du support de broche 16 sur le boítier 20. La courroie 18 entraíne le support de broche 16 en rotation et grâce à l'inclinaison de l'axe de la bouterolle 14 et de sa broche 15, la bouterolle 14 est animée d'un mouvement orbital.The electric motor 17 is mounted parallel to the axis of the spindle support 16 on the housing 20. The belt 18 drives the spindle support 16 in rotation and thanks to the inclination of the axis of the dowel 14 and from its spindle 15, the snap 14 is driven by a orbital motion.

    A l'extrémité du support de broche 16 opposée à la bouterolle 14, un couvercle ferme le boítier 20, qui sert de support pour une pompe hydraulique 25. Cette dernière comporte un piston 26, une soupape d'entrée 27 et une soupape de sortie 28.At the end of the spindle support 16 opposite the bolt 14, a cover closes the housing 20, which serves support for a hydraulic pump 25. The latter comprises a piston 26, an inlet valve 27 and a outlet valve 28.

    Le piston 26 est entraíné dans un mouvement de va et vient par un excentrique 29 monté sur le support de broche 16 à l'opposé de la bouterolle 14 et logé dans un évidement réalisé dans le couvercle 24.The piston 26 is driven in a going movement and comes by an eccentric 29 mounted on the support of spindle 16 opposite to the dowel 14 and housed in a recess made in the cover 24.

    La pompe 25 est alimentée en huile par un tuyau flexible 30 relié à un réservoir d'huile 31. Ce dernier prend place dans la partie fixe arrière 2 de la machine.The pump 25 is supplied with oil by a pipe hose 30 connected to an oil tank 31. The latter takes place in the rear fixed part 2 of the machine.

    Cette pompe 25 alimente un vérin hydraulique. Le corps de ce vérin est intégré au bloc fixe arrière 2, la chambre de ce vérin est constituée par un alésage borgne 32 réalisé dans le bloc arrière 2 et le piston 33 de ce vérin est solidaire du couvercle 24 du boítier 20.This pump 25 supplies a hydraulic cylinder. The body of this cylinder is integrated into the rear fixed block 2, the chamber of this cylinder is constituted by a blind bore 32 made in the rear block 2 and the piston 33 of this cylinder is integral with the cover 24 of the housing 20.

    L'alimentation en huile du vérin se fait par un canal 34 percé dans le couvercle 24 et le piston 33 et reliant la sortie de la pompe à la chambre du vérin.The oil supply to the cylinder is through a channel 34 drilled in the cover 24 and the piston 33 and connecting the pump outlet to the cylinder chamber.

    Lorsque le moteur électrique 17 est en marche, il entraíne en rotation le support de broche 16 et la pompe 25 alimente le vérin hydraulique. La bouterolle 14 est alors animée d'un mouvement orbital combiné à une translation mise en oeuvre par le vérin hydraulique.When the electric motor 17 is running, it rotates the spindle support 16 and the pump 25 supplies the hydraulic cylinder. The 14 then animated by an orbital movement combined with a translation implemented by the hydraulic cylinder.

    L'arrêt de la machine est automatique et est décrit ci-après.The machine stops automatically and is described below.

    Du côté de la bouterolle 14, le bloc mobile 3 comporte deux doigts 35 servant de butées mécanique. Chaque mâchoire 6 présente une surface fraisée 36 faisant face à un doigt 35. Cette surface 36 est placée de telle sorte qu'un doigt 35 vient buter contre elle lorsque l'évasement de l'extrémité du tube 4 est réalisé.On the side of the bolt 14, the movable block 3 has two fingers 35 serving as mechanical stops. Each jaw 6 has a milled surface 36 making facing a finger 35. This surface 36 is placed in such a way so that a finger 35 abuts against it when the end of the tube 4 is flared.

    Lorsque les doigts 35 butent contre les surfaces fraisées 36, le bloc mobile 3 s'arrête, mais le moteur 17 continue à tourner, entraínant la pompe 25. Le piston 33 du vérin ne bougeant plus, la pression dans la chambre 32 du vérin augmente. Un pressostat 37, relié à cette chambre 32 enregistre cette augmentation de pression. Lorsqu'alors la pression dépasse une valeur prédéterminée, le pressostat 37 commande une électrovanne 38 qui met alors en liaison la chambre 32 du vérin avec le réservoir 31. La pression diminue donc et le bloc mobile 3 n'est plus poussé vers la partie fixe avant.When fingers 35 abut against surfaces countersunk 36, the movable unit 3 stops, but the motor 17 continues to rotate, driving the pump 25. The piston 33 cylinder no longer moving, pressure in chamber 32 of the cylinder increases. A pressure switch 37, connected to this chamber 32 records this increase in pressure. When then the pressure exceeds a predetermined value, the pressure switch 37 controls a solenoid valve 38 which then puts in connection with the chamber 32 of the jack with the reservoir 31. The pressure therefore decreases and the mobile unit 3 is no longer pushed towards the front fixed part.

    Pour faire revenir le bloc mobile 3 vers le bloc fixe arrière 2 (comme représenté sur les figures 1 et 2), des ressorts 39 disposés entre le bloc fixe avant 1 et la partie mobile 3 entourent les deux colonnes 12.To return the mobile block 3 to the block fixed rear 2 (as shown in Figures 1 and 2), springs 39 arranged between the front fixed block 1 and the movable part 3 surround the two columns 12.

    De plus, pour éviter d'endommager la machine, deux entretoises 40 disposées autour des ressorts 39 sont prévues pour limiter la course de la partie mobile. Ainsi, si le moteur 17 est mis en marche par inadvertance alors qu'il n'y a pas de mâchoire 6 dans le porte-mâchoires, le bloc mobile 3 vient en butée grâce aux entretoises 40 et le pressostat 37 commande le retour de la partie mobile 3.In addition, to avoid damaging the machine, two spacers 40 arranged around the springs 39 are provided to limit the travel of the moving part. So, if the motor 17 is started inadvertently then there is no jaw 6 in the jaw holder, the movable block 3 abuts with spacers 40 and the pressure switch 37 controls the return of the mobile part 3.

    Le pressostat 37 peut commander non seulement l'électrovanne 38, mais aussi l'alimentation du moteur 17. Ainsi, lorsque la pression devient trop importante, le moteur 17 est arrêté.The pressure switch 37 can control not only the solenoid valve 38, but also the supply of the motor 17. So when the pressure becomes too great, the engine 17 is stopped.

    Bien entendu, la machine représentée aux figures 1 et 2 peut être équipée d'un capot recouvrant la partie fixe arrière 2 et la partie mobile 3, ainsi que de poignées facilitant le transport de la machine. Ces accessoires n'ont pas été représentés au dessin.Of course, the machine shown in Figures 1 and 2 can be fitted with a cover covering the part fixed rear 2 and mobile part 3, as well as handles for easy transport of the machine. These accessories have not been shown in the drawing.

    La figure 3 représente en coupe une vanne 41 ayant des fonctions similaires à celles du pressostat 37 et de l'électrovanne 38.Figure 3 shows in section a valve 41 having functions similar to those of pressure switch 37 and the solenoid valve 38.

    Cette vanne 41 est reliée par son entrée 42 à la chambre 32 du vérin et par sa sortie 47 au réservoir 31. Elle comporte une soupape tarée 43 et un tiroir 44.This valve 41 is connected by its input 42 to the chamber 32 of the jack and via its outlet 47 to the reservoir 31. It includes a calibrated valve 43 and a drawer 44.

    Lorsque la pression augmente dans la chambre du vérin 32 et dépasse une valeur prédéterminée, réglable en agissant sur une vis 45, la soupape tarée 43 s'ouvre et met la chambre du vérin en liaison avec une chambre 46 située à une extrémité du tiroir 44. Ce dernier est alors poussé sous l'effet de la pression et coulisse jusque dans une position où l'entrée 42 est en liaison avec la sortie 47, c'est-à-dire que la chambre 32 du vérin est reliée au réservoir 31.When the pressure increases in the chamber cylinder 32 and exceeds a predetermined value, adjustable in acting on a screw 45, the calibrated valve 43 opens and puts the cylinder chamber in connection with a chamber 46 located at one end of drawer 44. The latter is then pushed under the pressure and slides into a position where the inlet 42 is linked to the outlet 47, that is to say that the chamber 32 of the jack is connected to the tank 31.

    Pour maintenir le tiroir 44 dans cette position, un système d'encliquetage comportant une bille 48, un ressort 49 et une encoche 50 réalisée sur une tige 51 solidaire du tiroir 44 est prévu.To keep the drawer 44 in this position, a latching system comprising a ball 48, a spring 49 and a notch 50 produced on a rod 51 integral with the drawer 44 is provided.

    Pour réarmer le système, il suffit de prévoir que, lorsque le bloc mobile 3 revient dans la position représentée aux figures 1 et 2, un index (non représenté) vienne agir sur la tige 51 pour la repositionner dans la position montrée à la figure 3.To rearm the system, it suffices to provide that, when the movable block 3 returns to the position shown in Figures 1 and 2, an index (not shown) come and act on the rod 51 to reposition it in the position shown in figure 3.

    Cette vanne 41 peut notamment être utilisée lorsque la machine décrite ci-dessus est placée dans une atmosphère dangereuse avec risque d'explosion. Le moteur électrique 17 est alors remplacé par un moteur pneumatique par exemple et la machine peut fonctionner sans faire d'étincelle.This valve 41 can in particular be used when the machine described above is placed in a dangerous atmosphere with risk of explosion. Engine electric 17 is then replaced by a pneumatic motor for example and the machine can operate without doing spark.

    La figure 4 montre un dispositif permettant de relever automatiquement la butée mobile 8 nécessaire pour le positionnement de l'extrémité du tube 4 lorsque le bloc mobile 3 s'approche de la partie fixe avant 1.Figure 4 shows a device for automatically raise the movable stop 8 necessary to the positioning of the end of the tube 4 when the block mobile 3 approaches the front fixed part 1.

    Le dispositif comporte une came de relevage 52 montée sur le bloc mobile 3. Cette came 52 présente une surface inclinée qui coopère avec un levier solidaire de la butée mobile 8, de telle sorte que lorsque le bloc mobile 3 avance vers la partie fixe avant 1, la butée mobile 3 s'écarte de la position où elle permet le bon positionnement de l'extrémité du tube 4.The device comprises a lifting cam 52 mounted on the movable block 3. This cam 52 has a inclined surface which cooperates with a lever integral with the movable stop 8, so that when the block mobile 3 advances towards the front fixed part 1, the stop mobile 3 deviates from the position where it allows the correct positioning of the end of the tube 4.

    Claims (16)

    1. A machine for widening tube ends by swaging, comprising a swaging head (14) mounted in a support, two jaws (6) forming a grip used for holding in position one end of the tube (4) to be widened, actuating means (17, 18) enabling activation of the swaging head in an orbital movement, actuating means (25) enabling the said swaging head (14) to be brought close to the end of the tube (4), and means (39) enabling it to be distanced therefrom, the jaws (6) being arranged in a fixed jaw-holder forming a first block (1) of the machine, a second fixed block (2) being opposite the first block, and a mobile block (3) comprising the swaging head (14), its support and its actuating means (17) having guiding means (12) connecting the two fixed blocks and being actuated into translational movement by a hydraulic actuator characterised in that the hydraulic actuator comprises an actuator body and an actuator chamber (32) integrated in the second fixed block (2), and an actuator piston (33) solid with the mobile block (3).
    2. A machine in accordance with Claim 1, characterised in that the swaging head (14) is mounted in a chuck (15), which itself is mounted via the intermediary of bearings (21) in a chuck support (16) caused to rotate by the actuating means (17) in an orbital movement of the swaging head, the axis of the swaging head and of its chuck forming an angle with the axis of rotation of the chuck support, thus enabling the swaging head (14) to be activated in an orbital movement.
    3. A machine in accordance with Claim 2, characterised in that the means for actuating the swaging head in an orbital movement comprise a motor (17) the output shaft of which, fitted with a pulley (19), is connected to the chuck support (16) by a belt (18).
    4. A machine in accordance with Claim 1, characterised in that the hydraulic actuator is fed by a hydraulic pump (25) mounted on the mobile block (3).
    5. A machine in accordance with Claim 4, characterised in that the hydraulic pump comprises a piston (26) upon which there acts an eccentric (29) mounted at the end of the axis of rotation of the chuck support.
    6. A machine in accordance with one of Claims 4 or 5, characterised in that the hydraulic pump (25) feeds the hydraulic actuator via the interior of the actuator piston.
    7. A machine in accordance with one of Claims 1 to 6, characterised in that the mobile block (3) is composed of at least one stop pin (35) used for abutting at the end of its travel against a jaw (6, 36) gripping the end of the tube (4), and in that the machine is composed of a pressure sensor (37) connected to the chamber of the actuator (32) and controlling a solenoid valve (38) in such a way that, when the pressure inside the actuator chamber (32) is too high, the actuator chamber is connected with a reservoir of oil (31).
    8. A machine in accordance Claim 7, characterised in that the actuation means enabling the swaging head to be activated in an orbital movement comprise an electric motor (17), the power supply to which is cut when the pressure sensor (37) activates the solenoid valve (38).
    9. A machine in accordance with one of Claims 1 to 6, characterised in that it is composed of a device enabling the actuator chamber (32) to be connected to a reservoir of oil (31), this device comprising a calibrated valve (43) which opens when the pressure within the actuator chamber (32) exceeds a predetermined value, and a slide valve (44) one end of which is connected with the chamber of the actuator (32) when the valve (43) is open and controlling the opening of a passage between the chamber of the actuator (32) and the reservoir of oil (31).
    10. A machine in accordance with one of Claims 1 to 9, characterised in that the means for guiding the mobile block (3) in a translational movement comprise two columns (12) linking the two fixed blocks (1, 2).
    11. A machine in accordance with one of Claims 1 to 10, characterised in that the means for distancing the swaging head (14) from the end of the tube (4) to be widened are composed of compression springs (39) placed between the first fixed block (1) and the mobile block (3).
    12. A machine in accordance with one of Claims 1 to 11, characterised in that the jaw carrier has a dove-tailed shape in which the two jaws (6) of complementary shape become engaged in such a way that, by a gripping effect, when the swaging head (14) comes to rest against the end of the tube (4), the two jaws (6) have a tendency to draw closer together, thus gripping the tube.
    13. A machine in accordance with Claim 12, characterised in that the first fixed block (1) is composed of a saddle (9) which, on one side, faces a jaw (6) when the jaws (6) are placed in the jaw carrier and, on another side, may be pushed towards this jaw (6) by an eccentric (10) actuated with the aid of a lever (11) in order to draw the two jaws (6) closer together and thus hold the end of the tube (4) in position.
    14. A machine in accordance with one of Claims 1 to 13, characterised in that the first fixed block (1) comprises a mobile stop against which the end of the tube (4) to be widened comes to abut so as to allow good positioning in the grip, articulated around an axis between a first position in which it faces the jaws (6) on the side of the swaging head (14) and a second position in which it is turned aside so as not to hinder the action of the swaging head (14) on the end of the tube (4).
    15. A machine in accordance with Claim 14, characterised in that the mobile stop (8) comprises a lever and in that the mobile block is equipped with a cam (52) presenting an inclined surface, co-operating with the lever of the mobile stop, so as to make the stop (8) change into its turned-away position when the swaging head (14) is moving in the direction of the first fixed block (1).
    16. A machine in accordance with one of Claims 1 to 15, characterised in that it comprises a vaporiser used for vaporising a lubricant, oriented towards the end of the tube (4) to be widened and mechanically actuated when the mobile block draws close to the first fixed block (1).
    EP96903084A 1995-02-13 1996-02-12 Headforming machine for expanding tube ends Expired - Lifetime EP0809552B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9501803 1995-02-13
    FR9501803A FR2730434B1 (en) 1995-02-13 1995-02-13 MACHINE FOR FLARING END OF TUBES BY BOTTLE
    PCT/FR1996/000222 WO1996025253A1 (en) 1995-02-13 1996-02-12 Headforming machine for expanding tube ends

    Publications (2)

    Publication Number Publication Date
    EP0809552A1 EP0809552A1 (en) 1997-12-03
    EP0809552B1 true EP0809552B1 (en) 1999-12-29

    Family

    ID=9476216

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96903084A Expired - Lifetime EP0809552B1 (en) 1995-02-13 1996-02-12 Headforming machine for expanding tube ends

    Country Status (11)

    Country Link
    EP (1) EP0809552B1 (en)
    JP (1) JP3830161B2 (en)
    AT (1) ATE188147T1 (en)
    AU (1) AU702815B2 (en)
    DE (1) DE69605896T2 (en)
    DK (1) DK0809552T3 (en)
    ES (1) ES2142047T3 (en)
    FR (1) FR2730434B1 (en)
    NO (1) NO312061B1 (en)
    NZ (1) NZ301745A (en)
    WO (1) WO1996025253A1 (en)

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5956987A (en) * 1995-02-13 1999-09-28 Parker Hannifin Rak Sa Machine for flaring pipe ends
    CN103124603B (en) * 2010-08-06 2015-04-29 美国润滑棒公司 Hand held flaring tool
    TW201532699A (en) 2013-10-30 2015-09-01 American Grease Stick Co Hand held flaring tool
    CN110918796A (en) * 2019-12-09 2020-03-27 袁福英 Expanding device for steel pipe machining
    CN113477825B (en) * 2021-05-27 2023-06-06 珠海格力智能装备有限公司 Processing equipment

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3040800A (en) * 1958-10-16 1962-06-26 Parker Hannifin Corp Tube flaring tool
    US2924263A (en) * 1958-12-24 1960-02-09 Kearney James R Corp Adjustable tube flaring machine and double-pivoted support therefor
    US3610016A (en) * 1969-08-12 1971-10-05 Tenneco Inc Unitized tube end forming machine
    FR2660219A1 (en) * 1990-03-28 1991-10-04 Parker Hannifin Rak Sa Rivet-snapping machine
    AU629472B2 (en) * 1990-06-07 1992-10-01 Mcdermott International, Inc. Conductor guide forming machine

    Also Published As

    Publication number Publication date
    DK0809552T3 (en) 2000-05-22
    DE69605896D1 (en) 2000-02-03
    NO312061B1 (en) 2002-03-11
    WO1996025253A1 (en) 1996-08-22
    NO973700L (en) 1997-09-30
    FR2730434B1 (en) 1997-03-21
    NZ301745A (en) 1999-11-29
    JPH11500066A (en) 1999-01-06
    EP0809552A1 (en) 1997-12-03
    DE69605896T2 (en) 2000-05-04
    ATE188147T1 (en) 2000-01-15
    NO973700D0 (en) 1997-08-12
    FR2730434A1 (en) 1996-08-14
    JP3830161B2 (en) 2006-10-04
    AU702815B2 (en) 1999-03-04
    AU4723996A (en) 1996-09-04
    ES2142047T3 (en) 2000-04-01

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