EP0225235A1 - Tube-cutting apparatus - Google Patents

Tube-cutting apparatus Download PDF

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Publication number
EP0225235A1
EP0225235A1 EP86402427A EP86402427A EP0225235A1 EP 0225235 A1 EP0225235 A1 EP 0225235A1 EP 86402427 A EP86402427 A EP 86402427A EP 86402427 A EP86402427 A EP 86402427A EP 0225235 A1 EP0225235 A1 EP 0225235A1
Authority
EP
European Patent Office
Prior art keywords
core
tube
counter knife
knife
cutting
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.)
Granted
Application number
EP86402427A
Other languages
German (de)
French (fr)
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EP0225235B1 (en
Inventor
Jean-Paul Languillat
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.)
Lhomme SA
Original Assignee
Lhomme SA
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Filing date
Publication date
Application filed by Lhomme SA filed Critical Lhomme SA
Publication of EP0225235A1 publication Critical patent/EP0225235A1/en
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Publication of EP0225235B1 publication Critical patent/EP0225235B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/164—Cutting rods or tubes transversely characterised by means for supporting the tube from the inside
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/16—Severing or cut-off
    • Y10T82/16016—Processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/16—Severing or cut-off
    • Y10T82/16131—Flying cutter type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/16—Severing or cut-off
    • Y10T82/16426—Infeed means
    • Y10T82/16803—Rotatable tool[s] driven by contact with work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/16—Severing or cut-off
    • Y10T82/16426—Infeed means
    • Y10T82/16803—Rotatable tool[s] driven by contact with work
    • Y10T82/16819—Axially movable tool support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/16—Severing or cut-off
    • Y10T82/16426—Infeed means
    • Y10T82/16967—Infeed means with means to support and/or rotate work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0596—Cutting wall of hollow work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/384—By tool inside hollow work

Definitions

  • the invention relates to a tube cutting device.
  • Chainsaws intended to cut individual tubes into several sections are in fact provided with knives and a counterpart fixed longitudinally, the latter being arranged on a fixed mandrel on which the tube is threaded.
  • the supply of tubes is hitherto necessarily done on the same side as the discharge of the sections since one side is prohibited by the connection of the counterpart, which prevents a continuous supply.
  • the cutting device according to the invention is remarkable in that the counter knife is mechanically connected to a core of high magnetic susceptibility, while a magnetic induction means is arranged to create a magnetic field in said core through the tube to be cut so as to act magnetically on the longitudinal position of said core and thereby on that of the counter knife as a function of the longitudinal position of the knife.
  • the magnetic induction means comprises a winding wound in a carcass around the tube to be cut, so as to create at least substantially longitudinal induction lines in the core.
  • the magnetic induction means has a fixed longitudinal position and creates induction lines of constant shapes and longitudinal positions, while that the core and the counter knife are connected together by a rigid non-magnetic element which is fixed integrally longitudinally to the core and the counter knife.
  • the fixing of the rigid element to the counter knife and / or to the core is free to rotate, so as to allow freedom of rotation of the counter knife relative to the core.
  • the knife or knives are positioned on one side of the magnetic induction means and a pusher is provided, preferably on the side of said knives, to supply the device individually with cut-off tubes and to advance each tube of the length desired according to the sections to be obtained, while the cut sections are evacuated on the side opposite the pusher relative to the induction means.
  • the invention also relates to a device for cutting a tube manufactured continuously, the knife or knives being moved longitudinally at the time of cutting, synchronously with the advancement of the tube during manufacture.
  • the invention recommends that the magnetic induction means be arranged so as to create a variable magnetic field in position, the movement of the field and consequently that of the core being slaved to the cutting-off cycle.
  • the induction means is for example mounted on a carriage movable longitudinally and whose movement is controlled by the cutting cycle.
  • the size, and consequently the weight of the induction means also become important so that the setting in motion of said induction means is difficult.
  • the invention proposes in this case a remarkable embodiment in that the induction means has a fixed longitudinal position and in that a tubular element made of material with high magnetic susceptibility is mounted movable longitudinally around the tube. to be cut, said tubular element having a part with low magnetic susceptibility, of length preferably at most equal to that of the core, while the movement of the tubular element is controlled by the cutting cycle so that the movement of said tubular element in the magnetic field of the induction means causes the displacement of the core which channels the induction lines crossing the part with high magnetic susceptibility of the tubular element.
  • the core and the counter knife can be connected together by a rigid non-magnetic element which is fixed integrally longitudinally to the core and the counter knife, while the carriage, or respectively the tubular element, is slaved to the movement of the tube, so that the core and therefore the counter knife follow synchronously the movement of the tube and the knife during at least the action of the latter, a servo being provided to return the carriage, or respectively the tubular element, and therefore the counter knife, in the initial position after each cutting for a new cutting cycle.
  • the core and the counter knife are connected in such a way that the counter knife can deviate freely from a certain length of the core while the carriage, or respectively the tubular element, is controlled.
  • the core advances rapidly by a certain length before the action of the knives, approaching the counter knife, the outside diameter of which is preferably substantially equal to the inside diameter of the tube so that said counter -couteau can be driven freely by the tube itself by moving away from the core during cutting, a servo being provided to bring the carriage, or respectively the tubular element and therefore the counter knife, in the initial position after each cutting for a new cutting cycle.
  • the core and the counter knife are for example interconnected by a cable so that the advancement of the core creates a slack in said cable allowing freedom of advancement of the counter knife and that backward movement of the core creates a tension in the cable making it possible to bring said counter knife back.
  • the cable is replaced by a rigid connecting rod which slides freely in the core so that the advancement of the core is effected by sliding without acting on the counter knife while a stop is provided upstream. of the core so that a return to the back of the core brings the counter knife back by pulling the connecting rod via said stop.
  • Figures 1 to 3 show a frame 1 which supports, in a fixed manner, a carcass 2 containing a coil 3 of copper wire, arranged so as to surround the tube 4 to be cut.
  • the tube 4 is shown here cut longitudinally (as well as the carcass 2) to reveal the interior.
  • the tube 4 can be driven in rotation by means of drive rollers 5a, 5b (FIGS. 1 and 2) themselves actuated by a motor 6 and through a set of gears 7 (FIG. 1).
  • the tube 4 is further maintained and centered by rollers 8a to 8d arranged on the carcass 2 (8a and 8d are visible on the Figures 1 and 2, 8a to 8c are visible in Figure 3 while two other non-visible rollers corresponding to the rollers 8b and 8c are provided on the other side of the carcass 2).
  • rollers as shown in the drawings, is provided to allow both a longitudinal displacement and a rotation of the tube 4.
  • a core 9 of good magnetic susceptibility such as soft iron mechanically connected to a counter knife 10 by means of a connecting piece 11 made of non-magnetic material (for example aluminum).
  • the mechanical connections between the core 9 and the part 11 and between the latter and the counter knife 10 are such that they ensure, on the one hand, a free rotation of these three elements with respect to each other (by means of parts rolling) but, on the other hand, longitudinal solidarity so that the counter knife 10 can be actuated in rotation with the tube 4 without driving the core 9.
  • a knife 12 ( Figures 1 and 2) in the form of a disc.
  • the knife 12 is pivotally mounted so that it can penetrate the thickness of the tube 4.
  • a pusher 13 mounted free to rotate, at the end of an actuating rod 14, guided in the chassis 1.
  • each tube is supplied by the pusher 13, while the rod 14 is actuated in the direction of the arrow F1 ( Figure 1) so as to properly position said tube relative to with a knife 12.
  • the iron core 9 is held in position thanks to the magnetic field created by the winding 3 traversed by an electric current so that the counter knife 10 remains in good position relative to the knife 12.
  • the knife (s) and the counter knife could be arranged on the other side of the carcass 2.
  • This device is particularly interesting since, on one side of the carcass, the tubes are supplied, while on the other side, the sections obtained are recovered.
  • FIGS. 4 and 5 show two embodiments more particularly intended for cutting-off devices provided at the end of spiraling machines for the continuous production of cardboard tubes and more generally, for machines in which the tube in production or in one piece is moved longitudinally at the time of cutting.
  • the knife or knives are also moved longitudinally to follow the cutting tube during cutting. It is therefore necessary then, that the counter knife follows the movement of the tube.
  • Figure 4 has, as in Figure 1, a carcass 2, provided with a coil 3, while a soft iron core 9 'is mechanically connected to a counter knife 10 'by means here of a non-magnetic rod 11' possibly free to rotate on the core 9 'and / or on the counter knife 10'.
  • This device also includes knives 12 ′ (here two are shown), possibly a schematic entry at 15, for rotating the drive rollers, such as 5 ′ , with, in addition here, pressure rollers 16.
  • the carcass 2 is fixed here on a mobile carriage 17 which is guided on slides 18 of a fixed frame.
  • the carriage 17 is driven by a crank rod system 19, synchronously with the advancement of the tube 4 (by a servo-control not shown).
  • Means are obviously provided for bringing the carriage 17 and the knives 12 'back to the initial position for a new cutting cycle, said carriage having a back and forth movement according to the double arrow F3 in FIG. 4.
  • the tube is actuated in rotation during its manufacture by spiraling so that the means 15 and 5 ′ a are not compulsory.
  • FIG. 5 shows another particularly interesting and original embodiment since it makes it possible to have a fixed induction means (carcass-winding) while allowing movement of the core.
  • the core 9 '' however here has a longitudinal dimension less than that of the previous embodiments, while the rod 11 '' passes through the core 9 '' and has a stop 20 at its free end.
  • a tube 21 made of material of good magnetic susceptibility (soft iron, steel, etc.) is mounted coaxially around the tube 4 to be cut.
  • the tube 21 has in its central part, a ring 22 of material of very low magnetic susceptibility (in copper for example) while said tube is mounted on a carriage 23 mounted movable longitudinally and actuated for example by a jack 24 so as to follow the movement of the tube 4 according to arrow F4.
  • the carriage 23 will also have a back and forth movement according to the double arrow F5 in the manner described below.
  • the induction lines pass through the magnetic part of said tube and are channeled by the core 9 '', said lines bypassing the ring 22.
  • the rod 11 '' slides in the core 9 '' so that the counter knife 10 '' is not influenced by the movement of the core 9 '' in the direction of arrow F4.
  • a return in the other direction will allow the core 9 '' to pull on the counter knife 10 '' thanks to the stop 20 of the rod 11 ''.
  • the rod 11 'in FIG. 4 can be replaced by a cable or a sliding rod of the type of the rod 11'' of FIG. 5, the carriage 17 having a movement of the type of that described in connection with the carriage 23 of FIG. 5.
  • the invention relates mainly, but not exclusively, to cardboard tubes.
  • the tubes may have a circular or polygonal section, in the latter case, the means for rotating provided in FIG. 1 can for example be replaced by a pusher mounted to rotate.

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  • Details Of Cutting Devices (AREA)

Abstract

L'invention concerne un dispositif de tronçonnage de tubes comportant au moins un couteau (12) qui coopère en fin de coupe avec une contrepartie dénommée ci-après contre-couteau (10) disposé à l'intérieur du tube (4) à tronçonner.The invention relates to a device for cutting tubes comprising at least one knife (12) which cooperates at the end of cutting with a counterpart hereinafter called counter knife (10) disposed inside the tube (4) to be cut.

Le dispositif selon l'invention est remarquable en ce que le contre-couteau (10) est relié mécaniquement à un noyau (9) de forte susceptibilité magnétique tandis qu'un moyen d'induction magnétique (2,3) est aménagé pour créer un champ magnétique dans ledit noyau à travers le tube (4) à tronçonner de manière à pouvoir agir magnétiquement sur la position longitudinale dudit noyau et par là même sur celle du contre-couteau (10) en fonction de la position longitudinale du couteau.

Figure imgaf001
The device according to the invention is remarkable in that the counter knife (10) is mechanically connected to a core (9) of high magnetic susceptibility while a magnetic induction means (2,3) is arranged to create a magnetic field in said core through the tube (4) to be cut so as to be able to act magnetically on the longitudinal position of said core and thereby on that of the counter knife (10) as a function of the longitudinal position of the knife.
Figure imgaf001

Description

L'invention concerne un dispositif de tronçonnage de tubes.The invention relates to a tube cutting device.

Il est connu de tronçonner des tubes au moyen de couteaux qui pénètrent dans l'épaisseur du tube alors que celui-ci est entraîné en rotation.It is known to cut tubes by means of knives which penetrate the thickness of the tube while the latter is rotated.

Pour tronçonner certains tubes et plus particulièrement les tubes en matière peu rigide, tels les tubes en carton, il est nécessaire de disposer à l'intérieur du tube une contrepartie sur laquelle le couteau vient finir sa coupe.To cut certain tubes and more particularly tubes made of non-rigid material, such as cardboard tubes, it is necessary to place inside the tube a counterpart on which the knife comes to finish cutting.

Jusqu'à présent, la contrepartie était reliée mécaniquement par un moyen disposé à l'intérieur du tube afin d'assurer son maintien en position fixe ou permettre de le déplacer longitudinalement.Up to now, the counterpart has been mechanically connected by means arranged inside the tube in order to ensure that it is held in a fixed position or to allow it to be displaced longitudinally.

Les tronçonneuses destinées à découper des tubes unitaires en plusieurs tronçons sont en effet munies de couteaux et d'une contrepartie fixes longitudinalement, cette dernière étant aménagée sur un mandrin fixe sur lequel le tube est enfilé.Chainsaws intended to cut individual tubes into several sections are in fact provided with knives and a counterpart fixed longitudinally, the latter being arranged on a fixed mandrel on which the tube is threaded.

Au contraire, dans les dispositifs de tronçonnage d'un tube fabriqué en continu, telle une spiraleuse pour tube carton par exemple, il est nécessaire que le ou les couteaux et la contrepartie suivent longitudinalement et de manière synchrone le tube en cours de fabrication, au moment de la coupe, les couteaux et la contrepartie étant ramenés en position initiale après chaque tronçonnage par un moyen passant par le mandrin le roulage de la sprialeuse.On the contrary, in the cutting devices of a continuously manufactured tube, such as a spiraling machine for cardboard tube for example, it is necessary that the knife (s) and the counterpart follow longitudinally and synchronously the tube during manufacture, at when cutting, the knives and the counterpart being returned to the initial position after each cutting by a means passing through the mandrel rolling the sprialeuse.

Il est clair que la liaison mécanique de la contrepartie est un handicap et empêche notamment certaines applications.It is clear that the mechanical connection of the counterpart is a handicap and in particular prevents certain applications.

Pour une tronçonneuse de tubes unitaires par example, l'approvisionnement en tubes se faisant jusqu'à présent nécessairement du même côté que la décharge des tronçons puisqu'un côté est interdit par la liaison de la contrepartie, ce qui empêche un approvisionnement en continu.For a chainsaw of unitary tubes for example, the supply of tubes is hitherto necessarily done on the same side as the discharge of the sections since one side is prohibited by the connection of the counterpart, which prevents a continuous supply.

Dans les dispositifs de tronçonnage d'un tube fabriqué en continu, il n'est pas toujours possible de percer ou d'utiliser l'intérieur du mandrin de roulage lorsque par exemple, les diamètres sont trop petits ou lorsque l'intérieur du mandrin est déjà utilisé pour d'autres fonctions (mandrin chauffant, refroidissement...) ou encore lorsque ledit mandrin doit être plein pour mieux résister à certaines contraintes.In the cutting devices of a continuously manufactured tube, it is not always possible to drill or use the inside of the rolling mandrel when, for example, the diameters are too small or when the inside of the mandrel is already used for other functions (heating mandrel, cooling ...) or even when said mandrel must be full to better resist certain constraints.

C'est pourquoi l'inventeur a cherché et trouvé un moyen qui permet de maintenir en position et/ou de déplacer la contrepartie dénommée ci-après contre-couteau, sans que celui-ci ne soit relié mécaniquement à un moyen extérieur.This is why the inventor sought and found a means which makes it possible to maintain in position and / or to move the counterpart hereinafter referred to as a counter knife, without the latter being mechanically connected to an external means.

Le dispositif de tronçonnage selon l'invention est remarquable en ce que le contre-couteau est relié mécaniquement à un noyau de forte susceptibilité magnétique, tandis qu'un moyen d'induction magnétique est aménagé pour créer un champ magnétique dans ledit noyau à travers le tube à tronçonner de manière à pourvoir agir magnétiquement sur la position longitudinale dudit noyau et par là même sur celle du contre-couteau en fonction de la position longitudinale du couteau.The cutting device according to the invention is remarkable in that the counter knife is mechanically connected to a core of high magnetic susceptibility, while a magnetic induction means is arranged to create a magnetic field in said core through the tube to be cut so as to act magnetically on the longitudinal position of said core and thereby on that of the counter knife as a function of the longitudinal position of the knife.

Avantageusement, le moyen d'induction magnétique comporte un bobinage enroulé dans une carcasse autour du tube à tronçonner, de manière à créer au moins des lignes d'induction sensiblement longitudinales dans le noyau.Advantageously, the magnetic induction means comprises a winding wound in a carcass around the tube to be cut, so as to create at least substantially longitudinal induction lines in the core.

Selon un mode de réalisation muni d'au moins un couteau à position longitudinale fixe pour le tronçonnage de tubes unitaires, le moyen d'induction magnétique présente une position longitudinale fixe et crée des lignes d'induction de formes et de positions longitudinales constantes, tandis que le noyau et le contre-couteau sont reliés entre eux par un élément rigide non magnétique qui est fixé de manière solidaire longitudinalement au noyau et au contre-couteau.According to an embodiment provided with at least one knife with a fixed longitudinal position for cutting off individual tubes, the magnetic induction means has a fixed longitudinal position and creates induction lines of constant shapes and longitudinal positions, while that the core and the counter knife are connected together by a rigid non-magnetic element which is fixed integrally longitudinally to the core and the counter knife.

Avantageusement dans ce cas, la fixation de l'élément rigide au contre-couteau et/ou au noyau est libre en rotation, de manière à permettre une liberté de rotation du contre-couteau relativement au noyau.Advantageously in this case, the fixing of the rigid element to the counter knife and / or to the core is free to rotate, so as to allow freedom of rotation of the counter knife relative to the core.

De préférence, le ou les couteaux sont positionnés d'un côté du moyen d'induction magnétique et un poussoir est prévu, de préférence du côté desdits couteaux, pour approvisionner unitairement le dispositif en tubes à tronçonner et pour faire avancer chaque tube de la longeur voulue en fonction des tronçons à obtenir, tandis que l'évacuation des tronçons coupés s'effectue du côté opposé au poussoir par rapport au moyen d'induction.Preferably, the knife or knives are positioned on one side of the magnetic induction means and a pusher is provided, preferably on the side of said knives, to supply the device individually with cut-off tubes and to advance each tube of the length desired according to the sections to be obtained, while the cut sections are evacuated on the side opposite the pusher relative to the induction means.

Il est clair qu'avec un tel dispositif, on bénéficie, par rapport à l'art connu, d'un côté entrée et d'un côté sortie, ce qui permet un approvisionnement en continu et ce qui facilite notamment le comptage, le tri des pertes, le rangement des tronçons...It is clear that with such a device, there is, compared to the known art, an input side and an output side, which allows a continuous supply and which in particular facilitates counting, sorting losses, storing the sections ...

Toutefois, l'invention concerne aussi un dispositif de tronçonnage d'un tube fabriqué en continu, le ou les couteaux étant mûs longitudinalement au moment du tronçonnage, de manière synchrone avec l'avancement du tube en cours de fabrication.However, the invention also relates to a device for cutting a tube manufactured continuously, the knife or knives being moved longitudinally at the time of cutting, synchronously with the advancement of the tube during manufacture.

Pour cette application, l'invention préconise que le moyen d'induction magnétique soit aménagé de manière à créer un champ magnétique variable en position, le déplacement du champ et par conséquent celui du noyau étant asservis au cycle de tronçonnage.For this application, the invention recommends that the magnetic induction means be arranged so as to create a variable magnetic field in position, the movement of the field and consequently that of the core being slaved to the cutting-off cycle.

Pour ce faire, le moyen d'induction est par exemple monté sur un chariot mobile longitudinalement et dont le mouvement est asservi au cycle de tronçonnage.To do this, the induction means is for example mounted on a carriage movable longitudinally and whose movement is controlled by the cutting cycle.

Toutefois, lorsque le tube à découper présente un diamètre et/ou une épaisseur élevés, la taille, et par conséquent le poids du moyen d'induction, deviennent également importants de telle sorte que la mise en mouvement dudit moyen d'induction est difficile.However, when the tube to be cut has a large diameter and / or thickness, the size, and consequently the weight of the induction means, also become important so that the setting in motion of said induction means is difficult.

C'est pourquoi l'invention propose dans ce cas un mode de réalisation remarquable en ce que le moyen d'induction présente une position longitudinale fixe et en ce qu'un élément tubulaire en matériau à forte susceptibilité magnétique est monté mobile longitudinalement autour du tube à tronçonner, ledit élément tubulaire présentant une partie à faible susceptibilité magnétique, de longeur de préférence au plus égale à celle du noyau, tandis que le mouvement de l'élément tubulaire est asservi au cycle de tronçonnage de telle sorte que le déplacement dudit élément tubulaire dans le champ magnétique du moyen d'induction entraîne le déplacement du noyau qui canalise les lignes d'induction traversant la partie à forte susceptibilité magnétique de l'élément tubulaire.This is why the invention proposes in this case a remarkable embodiment in that the induction means has a fixed longitudinal position and in that a tubular element made of material with high magnetic susceptibility is mounted movable longitudinally around the tube. to be cut, said tubular element having a part with low magnetic susceptibility, of length preferably at most equal to that of the core, while the movement of the tubular element is controlled by the cutting cycle so that the movement of said tubular element in the magnetic field of the induction means causes the displacement of the core which channels the induction lines crossing the part with high magnetic susceptibility of the tubular element.

Dans le cas d'un chariot ou d'un élément tubulaire mobile, le noyau et le contre-couteau peuvent être reliés entre eux par un élément rigide non magnétique qui est fixé de manière solidaire longitudinalement au noyau et au contre-couteau, tandis que le chariot, ou respectivement l'élément tubulaire, est asservi au mouvement du tube, de manière telle que le noyau et donc le contre-couteau suivent de manière synchrone le mouvement du tube et du couteau pendant au moins l'action de ce dernier, un asservissement étant prévu pour ramener le chariot, ou respectivement l'élément tubulaire, et donc le contre-couteau, en position initiale après chaque tronçonnage pour un nouveau cycle de tronçonnage.In the case of a carriage or of a movable tubular element, the core and the counter knife can be connected together by a rigid non-magnetic element which is fixed integrally longitudinally to the core and the counter knife, while the carriage, or respectively the tubular element, is slaved to the movement of the tube, so that the core and therefore the counter knife follow synchronously the movement of the tube and the knife during at least the action of the latter, a servo being provided to return the carriage, or respectively the tubular element, and therefore the counter knife, in the initial position after each cutting for a new cutting cycle.

Cependant, il est possible aussi que le noyau et le contre-couteau soient reliés de manière telle que le contre-­couteau puisse s'écarter librement d'une certaine longeur du noyau tandis que le chariot, ou respectivement l'élément tubulaire, est asservi au cycle de tronçonnage de manière telle que le noyau avance rapidement d'une certaine longeur avant l'action des couteaux en se rapprochant du contre-couteau dont le diamètre extérieur est de préférence sensiblement égal au diamètre intérieur du tube de telle sorte que ledit contre-couteau puisse être entraîné librement par le tube lui-même en s'écartant du noyau pendant le tronçonnage, un asservissement étant prévu pour ramener le chariot, ou respectivement l'élément tubulaire et donc le contre-­couteau, en position initiale après chaque tronçonnage pour un nouveau cycle de tronçonnage.However, it is also possible that the core and the counter knife are connected in such a way that the counter knife can deviate freely from a certain length of the core while the carriage, or respectively the tubular element, is controlled. during the cutting cycle in such a way that the core advances rapidly by a certain length before the action of the knives, approaching the counter knife, the outside diameter of which is preferably substantially equal to the inside diameter of the tube so that said counter -couteau can be driven freely by the tube itself by moving away from the core during cutting, a servo being provided to bring the carriage, or respectively the tubular element and therefore the counter knife, in the initial position after each cutting for a new cutting cycle.

Dans ce dernier cas, le noyau et le contre-couteau sont par exemple reliés entre eux par un câble de telle sorte que l'avancement du noyau crée un mou dans ledit câble permettant une liberté d'avancement du contre-couteau et qu'un retour en arrière du noyau crée une tension du câble permettant de ramener ledit contre-couteau.In the latter case, the core and the counter knife are for example interconnected by a cable so that the advancement of the core creates a slack in said cable allowing freedom of advancement of the counter knife and that backward movement of the core creates a tension in the cable making it possible to bring said counter knife back.

Selon une variante, le câble est remplacé par une tringle rigide de liaison qui coulisse librement dans le noyau de telle sorte que l'avancement du noyau s'effectue par coulissement sans agir sur le contre-couteau tandis qu'une butée est prévue en amont du noyau de manière qu'un retour en arrière du noyau ramène le contre-couteau en tirant la tringle de liaison par l'intermédiaire de ladite butée.Alternatively, the cable is replaced by a rigid connecting rod which slides freely in the core so that the advancement of the core is effected by sliding without acting on the counter knife while a stop is provided upstream. of the core so that a return to the back of the core brings the counter knife back by pulling the connecting rod via said stop.

L'invention sera bien comprise et d'autres particularités apparaîtront à la lecture de la description qui va suivre et qui se réfère aux dessins annexés dans lesquels:

  • - la figure 1 est une élévation représentant schématiquement un mode de réalisation pour tronçonneuse de tubes unitaires,
  • - la figure 2 est une vue partielle de dessus de la figure 1,
  • - la figure 3 est une vue en bout (côté bobinage) de la figure 1,
  • - la figure 4 montre schématiquement en élévation un premier mode de réalisation, pour tronçonnage d'un tube carton fabriqué en continu,
  • - la figure 5 montre schématiquement en élévation un second mode de réalisation, pour tronçonnage d'un tube carton fabriqué en continu.
The invention will be clearly understood and other particularities will appear on reading the description which follows and which refers to the appended drawings in which:
  • FIG. 1 is an elevation schematically showing an embodiment for a chainsaw for unit tubes,
  • FIG. 2 is a partial top view of FIG. 1,
  • FIG. 3 is an end view (winding side) of FIG. 1,
  • FIG. 4 schematically shows in elevation a first embodiment, for cutting a continuously manufactured cardboard tube,
  • - Figure 5 shows schematically in elevation a second embodiment, for cutting a continuously manufactured cardboard tube.

Les figures 1 à 3 montrent un bâti 1 qui supporte, de manière fixe, une carcasse 2 renfermant un bobinage 3 en fil de cuivre, disposé de manière à entourer le tube 4 à tronçonner.Figures 1 to 3 show a frame 1 which supports, in a fixed manner, a carcass 2 containing a coil 3 of copper wire, arranged so as to surround the tube 4 to be cut.

Le tube 4 est représenté ici coupé longitudinalement (de même que la carcasse 2) pour faire apparaître l'intérieur.The tube 4 is shown here cut longitudinally (as well as the carcass 2) to reveal the interior.

Le tube 4 peut être entraîne en rotation au moyen de rouleaux d'entraînement 5a, 5b (figure 1 et 2) eux-mêmes actionnés par un moteur 6 et l'intermédiaire d'un jeu d'engrenages 7 (figure 1).The tube 4 can be driven in rotation by means of drive rollers 5a, 5b (FIGS. 1 and 2) themselves actuated by a motor 6 and through a set of gears 7 (FIG. 1).

Le tube 4 est en outre maintenu et centré par des galets 8a à 8d aménagés sur la carcasse 2 (8a et 8d sont visibles sur les figures 1 et 2, 8a à 8c sont visibles sur la figure 3 tandis que deux autres galets non visibles correspondant aux galets 8b et 8c sont prévus de l'autre côté de la carcasse 2).The tube 4 is further maintained and centered by rollers 8a to 8d arranged on the carcass 2 (8a and 8d are visible on the Figures 1 and 2, 8a to 8c are visible in Figure 3 while two other non-visible rollers corresponding to the rollers 8b and 8c are provided on the other side of the carcass 2).

La forme des galets, comme le montre les dessins, est prévue pour permettre à la fois un déplacement longitudinal et une rotation du tube 4.The shape of the rollers, as shown in the drawings, is provided to allow both a longitudinal displacement and a rotation of the tube 4.

Dans le tube 4, est disposé un noyau 9 de bonne susceptibilité magnétique tel que du fer doux relié mécaniquement à un contre-couteau 10 par l'intermédiaire d'une pièce de liaison 11 en matériau non magnétique (par exemple en aluminium). Les liaisons mécaniques entre le noyau 9 et la pièce 11 et entre cette dernière et le contre-couteau 10 sont telles qu'elles assurent d'une part, une libre rotation de ces trois éléments les uns par rapport aux autres (au moyen de pièces de roulement) mais, d'autre part, une solidarité longitudinale de sorte que le contre-couteau 10 peut être actionné en rotation avec le tube 4 sans entraîner le noyau 9.In the tube 4, is arranged a core 9 of good magnetic susceptibility such as soft iron mechanically connected to a counter knife 10 by means of a connecting piece 11 made of non-magnetic material (for example aluminum). The mechanical connections between the core 9 and the part 11 and between the latter and the counter knife 10 are such that they ensure, on the one hand, a free rotation of these three elements with respect to each other (by means of parts rolling) but, on the other hand, longitudinal solidarity so that the counter knife 10 can be actuated in rotation with the tube 4 without driving the core 9.

Au-dessus du tube 4, du côté opposé aux rouleaux 5a, 5b est aménagé de manière fixe longitudinalement, un couteau 12 (figures 1 et 2) sous forme d'un disque.Above the tube 4, on the side opposite to the rollers 5a, 5b is arranged in a fixed manner longitudinally, a knife 12 (Figures 1 and 2) in the form of a disc.

Comme le montre plus particulièrement le détail de la figure 1, le couteau 12 est monté pivotant pour pouvoir venir pénétrer dans l'épaisseur du tube 4.As shown more particularly in the detail in FIG. 1, the knife 12 is pivotally mounted so that it can penetrate the thickness of the tube 4.

Du côté opposé à la carcasse 2, est en outre aménagé un poussoir 13, monté libre en rotation, à l'extrémité d'une tige d'actionnement 14, guidée dans le chassis 1.On the side opposite to the carcass 2, there is further provided a pusher 13, mounted free to rotate, at the end of an actuating rod 14, guided in the chassis 1.

Dans le mode de réalisation décrit à propos des figures 1 à 3, chaque tube est approvisionné par le poussoir 13, tandis que la tige 14 est actionnée dans le sens de la flèche F₁ (figure 1) de manière à positionner convenablement ledit tube par rapport au couteau 12.In the embodiment described with reference to Figures 1 to 3, each tube is supplied by the pusher 13, while the rod 14 is actuated in the direction of the arrow F₁ (Figure 1) so as to properly position said tube relative to with a knife 12.

Il est ainsi possible de faire un ou plusieurs tronçons en actionnant le couteau 12 après mise en rotation du tube. Chaque tronçon est ensuite évacué par le poussoir 13 du côté opposé à ce dernier par rapport à la carcasse 2.It is thus possible to make one or more sections by actuating the knife 12 after rotation of the tube. Each section is then evacuated by the pusher 13 on the side opposite the latter relative to the carcass 2.

Le noyau de fer 9 est maintenu en position grâce au champ magnétique crée par le bobinage 3 parcouru par un courant électrique de telle sorte que le contre-couteau 10 reste en bonne position par rapport au couteau 12.The iron core 9 is held in position thanks to the magnetic field created by the winding 3 traversed by an electric current so that the counter knife 10 remains in good position relative to the knife 12.

Il est clair bien sûr, qu'il est possible d'avoir plusieurs couteaux 12, de manière à faire des bagues par exemple.It is clear, of course, that it is possible to have several knives 12, so as to make rings for example.

De même, le ou les couteaux et le contre-couteau pourraient être disposés de l'autre côté de la carcasse 2.Likewise, the knife (s) and the counter knife could be arranged on the other side of the carcass 2.

Ce dispositif est particulièrement intéressant puisque d'un côté de la carcasse on approvisionne les tubes, tandis que de l'autre côté, on récupère les tronçons obtenus.This device is particularly interesting since, on one side of the carcass, the tubes are supplied, while on the other side, the sections obtained are recovered.

Les figures 4 et 5 montrent deux modes de réalisation plus particulièrement destinés aux dispositifs de tronçonnage prévus en bout des spiraleuses de fabrication en continu de tubes carton et d'une manière plus générale, pour les machines dans lesquelles le tube en fabrication ou unitaire est mû longitudinalement au moment de la coupe.FIGS. 4 and 5 show two embodiments more particularly intended for cutting-off devices provided at the end of spiraling machines for the continuous production of cardboard tubes and more generally, for machines in which the tube in production or in one piece is moved longitudinally at the time of cutting.

Dans ce cas, le ou les couteaux sont également mûs longitudinalement pour suivre pendant la coupe le tube à tronçonner. Il est donc nécessaire alors, que le contre-couteau suive le mouvement du tube.In this case, the knife or knives are also moved longitudinally to follow the cutting tube during cutting. It is therefore necessary then, that the counter knife follows the movement of the tube.

A cet effet, le mode de réalisation de la figure 4 présente, comme sur la figure 1, une carcasse 2, munie d'un bobinage 3, tandis qu'un noyau de fer doux 9' est relié mécaniquement à un contre-couteau 10' au moyen ici d'une tringle non magnétique 11' éventuellement libre en rotation sur le noyau 9' et/ou sur le contre-couteau 10'.To this end, the embodiment of Figure 4 has, as in Figure 1, a carcass 2, provided with a coil 3, while a soft iron core 9 'is mechanically connected to a counter knife 10 'by means here of a non-magnetic rod 11' possibly free to rotate on the core 9 'and / or on the counter knife 10'.

Ce dispositif comporte également des couteaux 12' (ici on en a représenté deux), eventuellement une entrée schématisée en 15, de mise en rotation de rouleaux d'entraînement, tel que 5'a avec en plus ici, des galets presseurs 16.This device also includes knives 12 ′ (here two are shown), possibly a schematic entry at 15, for rotating the drive rollers, such as 5 ′ , with, in addition here, pressure rollers 16.

Dans ce dispositif, les couteaux 12' sont entraînés de manière synchrone avec l'avancement du tube 4 dans le sens de la flèche F₂.In this device, the knives 12 'are driven synchronously with the advancement of the tube 4 in the direction of the arrow F₂.

Pour permettre au contre-couteau 10' de suivre également le tube 4, la carcasse 2 est fixée ici sur un chariot mobile 17 qui est guidé sur des glissières 18 d'un chassis fixe.To allow the counter knife 10 'to also follow the tube 4, the carcass 2 is fixed here on a mobile carriage 17 which is guided on slides 18 of a fixed frame.

Le chariot 17 est entraîné par un système bielle manivelle 19, de manière synchrone avec l'avancement du tube 4 (par un asservissement non représenté).The carriage 17 is driven by a crank rod system 19, synchronously with the advancement of the tube 4 (by a servo-control not shown).

Il est parfaitement clair que la tringle 11' permet d'assujettir longitudinalement le noyau 9' et le contre-couteau 10' de telle sorte que ce dernier peut suivre le tube 4 et les couteaux 12' dans leur mouvement de translation longitudinale puisque le chariot 17 transporte le bobinage 3 dont le champ magnétique impose au noyau 9' de suivre le mouvement dudit bobinage.It is perfectly clear that the rod 11 'makes it possible to subject the core 9' and the counter knife 10 'longitudinally so that the latter can follow the tube 4 and the knives 12' in their movement of longitudinal translation since the carriage 17 transports the winding 3 whose magnetic field forces the core 9 'to follow the movement of said winding.

Des moyens sont évidemment prévus pour ramener le chariot 17 et les couteaux 12' en position initiale pour un nouveau cycle de tronçonnage, ledit chariot ayant un mouvement de va et vient selon la flèche double F₃ de la figure 4.Means are obviously provided for bringing the carriage 17 and the knives 12 'back to the initial position for a new cutting cycle, said carriage having a back and forth movement according to the double arrow F₃ in FIG. 4.

Dans le mode de réalisation qui vient d'être décrit, le tube est actionné en rotation au cours de sa fabrication par spiralage de telle sorte que les moyens 15 et 5'a ne sont pas obligatoires.In the embodiment which has just been described, the tube is actuated in rotation during its manufacture by spiraling so that the means 15 and 5 ′ a are not compulsory.

La figure 5 montre un autre mode de réalisation particulièrement intéressant et original puisqu'il permet d'avoir un moyen d'induction (carcasse-bobinage) fixe tout en permettant un mouvement du noyau.FIG. 5 shows another particularly interesting and original embodiment since it makes it possible to have a fixed induction means (carcass-winding) while allowing movement of the core.

On retrouve ici la carcasse 2, le bobinage 3, le tube 4, une platine de coupe à un ou plusieurs couteaux schématisés en 12'', un noyau de fer doux 9'' et un contre-couteau 10'' relié ici audit noyau par une tringle 11''.Here we find the carcass 2, the winding 3, the tube 4, a cutting plate with one or more knives schematized in 12 '', a soft iron core 9 '' and a counter knife 10 '' connected here to said core by an 11 '' rod.

Le noyau 9'' présente toutefois ici une dimension longitudinale inférieure à celle des modes de réalisation précédents, tandis que la tringle 11'' traverse le noyau 9'' et présente à son extrémité libre une butée 20.The core 9 '' however here has a longitudinal dimension less than that of the previous embodiments, while the rod 11 '' passes through the core 9 '' and has a stop 20 at its free end.

Dans ce mode de réalisation, un tube 21 en matériau de bonne susceptibilité magnétique (fer doux, acier...) est monté coaxialement autour du tube 4 à tronçonner.In this embodiment, a tube 21 made of material of good magnetic susceptibility (soft iron, steel, etc.) is mounted coaxially around the tube 4 to be cut.

Le tube 21 présente dans sa partie centrale, une bague 22 en matériau de très faible susceptibilité magnétique (en cuivre par exemple) tandis que ledit tube est monté sur un chariot 23 monté mobile longitudinalement et actionné par exemple par un vérin 24 de manière à suivre le mouvement du tube 4 selon la flèche F₄. Le chariot 23 aura aussi un mouvement de va et vient selon la flèche double F₅ de la façon décrite ci-aprés.The tube 21 has in its central part, a ring 22 of material of very low magnetic susceptibility (in copper for example) while said tube is mounted on a carriage 23 mounted movable longitudinally and actuated for example by a jack 24 so as to follow the movement of the tube 4 according to arrow F₄. The carriage 23 will also have a back and forth movement according to the double arrow F₅ in the manner described below.

Par rapport à la figure 4, on constate que la carcasse 2 et le bobinage 3 sont fixes et qu'il est donc possible d'utiliser des moyens lourds pour des tubes de grands diamètres par exemple.Compared to FIG. 4, it can be seen that the carcass 2 and the winding 3 are fixed and that it is therefore possible to use heavy means for tubes of large diameters for example.

Lorsque le tube 21 est mû par le chariot 23, les lignes d'induction traversent la partie magnétique dudit tube et sont canalisées par le noyau 9'', lesdites lignes contournant la bague 22.When the tube 21 is moved by the carriage 23, the induction lines pass through the magnetic part of said tube and are channeled by the core 9 '', said lines bypassing the ring 22.

De la sorte, le noyau 9'' suit le déplacement du tube 21.In this way, the core 9 '' follows the movement of the tube 21.

Dans le mode de réalisation montré sur la figure 5, la tringle 11'' coulisse dans le noyau 9'' de telle sorte que le contre-couteau 10'' n'est pas influencé par le mouvement du noyau 9'' dans le sens de la flèche F₄. Par contre, il est clair qu'un retour dans l'autre sens permettra au noyau 9'' de tirer sur le contre-couteau 10'' grâce à la butée 20 de la tringle 11''.In the embodiment shown in FIG. 5, the rod 11 '' slides in the core 9 '' so that the counter knife 10 '' is not influenced by the movement of the core 9 '' in the direction of arrow F₄. On the other hand, it is clear that a return in the other direction will allow the core 9 '' to pull on the counter knife 10 '' thanks to the stop 20 of the rod 11 ''.

Cette disposition s'applique notamment au dispositif décrit dans le brevet Français numéro 8307802, au nom du même déposant, dans lequel le contre-couteau est entraîne pendant la coupe par le tube lui-même, puis ramené en sens inverse pour un nouveau cycle. Dans ce cas, il suffit que le tube 21 subisse un mouvement rapide vers le contre-couteau 10'' en se rapprochant de celui-ci, ledit contre couteau 10'' continuant son mouvement en étant simplement entraîné par le tube 4 (les diamètres étant étudiés en conséquence), tandis qu'un asservissement est prévu pour ramener brusquement le chariot 23 en position initiale après chaque tronçonnage.This provision applies in particular to the device described in French patent number 8307802, in the name of the same applicant, in which the counter knife is driven during cutting by the tube itself, then brought back in the opposite direction for a new cycle. In this case, it suffices that the tube 21 undergoes a rapid movement towards the counter knife 10 '' while approaching it, said counter knife 10 '' continuing its movement by simply being driven by the tube 4 (the diameters being studied accordingly), while a servo is provided to abruptly return the carriage 23 to the initial position after each cutting.

On obtiendrait toutefois le même résultat en remplaçant la tringle 11' par un simple câble.However, the same result would be obtained by replacing the rod 11 'with a simple cable.

Il est clair que la pièce de liaison 11 et la tringle 11' des modes de réalisation des figures respectivement 1 et 4, sont interchangeables.It is clear that the connecting piece 11 and the rod 11 'of the embodiments of Figures 1 and 4 respectively, are interchangeable.

De même, la tringle 11' de la figure 4 peut être remplacée par un câble ou une tringle coulissante du type de la tringle 11'' de la figure 5, le chariot 17 ayant un mouvement du type de celui décrit à propos du chariot 23 de la figure 5.Likewise, the rod 11 'in FIG. 4 can be replaced by a cable or a sliding rod of the type of the rod 11'' of FIG. 5, the carriage 17 having a movement of the type of that described in connection with the carriage 23 of FIG. 5.

Enfin, dans le mode de réalisation décrit à la figure 5, il est bien sûr possible d'avoir un mouvement du tube 21 synchrone de celui du tube 4, la liaison entre le noyau 9'' et le contre-­couteau 10'' étant rigide longitudinalement au moyen d'une pièce du type de celle de la figure 1 ou d'une tringle du type de celle de la figure 4.Finally, in the embodiment described in FIG. 5, it is of course possible to have a movement of the tube 21 synchronous with that of the tube 4, the connection between the core 9 '' and the counter knife 10 '' being rigid longitudinally by means of a part of the type of that of FIG. 1 or of a rod of the type of that of FIG. 4.

L'invention concerne principalement, mais non exclusivement, les tubes en carton.The invention relates mainly, but not exclusively, to cardboard tubes.

En outre, les tubes peuvent présenter une section circulaire ou polygonale, dans ce dernier cas, les moyens de mise en rotation prévus à la figure 1 peuvent par exemple être remplacés par un poussoir monté rotatif.In addition, the tubes may have a circular or polygonal section, in the latter case, the means for rotating provided in FIG. 1 can for example be replaced by a pusher mounted to rotate.

Claims (12)

1) Dispositif de tronçonnage de tubes comportant au moins un couteau (12,12',12'') qui coopère en fin de coupe avec une contrepartie dénommée ci-après contre-couteau (10,10',10'') disposé à l'intérieur du tube (4) à tronçonner, caractérisé en ce que le contre-couteau (10,10',10'') est relié mécaniquement à un noyau (9,9',9'') de forte susceptibilité magnétique tandis qu'un moyen d'induction magnétique (2,3) est aménagé pour créer un champ magnétique dans ledit noyau à travers le tube (4) à tronçonner de manière à pouvoir agir magnétiquement sur la position longitudinale dudit noyau et par là même sur celle du contre-­couteau (10,10',10'') en fonction de la position longitudinale du couteau.1) Tube cutting device comprising at least one knife (12,12 ', 12' ') which cooperates at the end of cutting with a counterpart hereinafter called counter knife (10,10', 10 '') disposed at the inside of the cut-off tube (4), characterized in that the counter knife (10,10 ', 10' ') is mechanically connected to a core (9,9', 9 '') of high magnetic susceptibility while that a magnetic induction means (2,3) is arranged to create a magnetic field in said core through the tube (4) to be cut so as to be able to act magnetically on the longitudinal position of said core and therefore on that counter knife (10,10 ', 10' ') depending on the longitudinal position of the knife. 2) Dispositif selon la revendication 1, caractérisé en ce que le moyen d'induction magnétique comporte un bobinage (3) enroulé dans une carcasse (2) autour du tube à tronçonner, de manière à créer au moins des lignes d'induction sensiblement longitudinales dans le noyau (9,9',9'').2) Device according to claim 1, characterized in that the magnetic induction means comprises a coil (3) wound in a carcass (2) around the tube to be cut, so as to create at least substantially longitudinal induction lines in the nucleus (9.9 ', 9' '). 3) Dispositif selon l'une des revendications 1 et 2, muni d'au moins un couteau (12) à position longitudinale fixe pour tronçonnage de tubes unitaires, caractérisé en ce que le moyen d'induction magnétique présente une position longitudinale fixe et crée des lignes d'induction de formes et de positions longitudinales constantes, tandis que le noyau (9) et le contre-­couteau (10) sont reliés entre eux par un élément rigide (11,11') non magnétique qui est fixé de manière solidaire longitudinalement au noyau (9) et au contre-couteau (10).3) Device according to one of claims 1 and 2, provided with at least one knife (12) with fixed longitudinal position for cutting of unitary tubes, characterized in that the magnetic induction means has a fixed longitudinal position and creates lines of induction of constant shapes and longitudinal positions, while the core (9) and the counter knife (10) are interconnected by a rigid non-magnetic element (11,11 ') which is fixed in a fixed manner longitudinally to the core (9) and to the counter knife (10). 4) Dispositif selon la revendication 3, caractérisé en ce que la fixation de l'élément rigide (11,11') au contre-couteau (10) et/ou au noyau (9) est libre en rotation, de manière à permettre une liberté de rotation du contre-couteau relativement au noyau.4) Device according to claim 3, characterized in that the fixing of the rigid element (11,11 ') to the counter knife (10) and / or to the core (9) is free to rotate, so as to allow a freedom of rotation of the counter knife relative to the core. 5) Dispositif selon l'une des revendications 3 et 4, caractérisé en ce que le ou les couteaux (12) sont positionnés d'un côté du moyen d'induction magnétique (2,3) et qu'un poussoir (13) est prévu, de préférence du côté desdits couteaux, pour approvisionner unitairement le dispositif en tubes à tronçonner et pour faire avancer chaque tube de la longueur voulue en fonction des tronçons à obtenir, tandis que l'évacuation des tronçons coupés s'effectue du côté opposé au poussoir par rapport au moyen d'induction.5) Device according to one of claims 3 and 4, characterized in that the knife or knives (12) are positioned on one side of the magnetic induction means (2,3) and that a pusher (13) is provided, preferably on the side of said knives, for supply the device individually with cut-off tubes and to advance each tube by the desired length according to the sections to be obtained, while the cut sections are evacuated on the side opposite the pusher relative to the induction means. 6) Dispositif selon l'une des revendications 1 et 2 pour tronçonnage d'un tube fabriqué en continu, le ou les couteaux (12', 12'') étant mûs longitudinalement au moment du tronçonnage, de manière synchrone avec l'avancement du tube en cours de fabrication, caractérisé en ce que le moyen d'induction magnétique est aménagé de manière à créer un champ magnétique variable en position, le déplacement du champ et par conséquent celui du noyau (9',9'') étant asservis au cycle de tronçonnage.6) Device according to one of claims 1 and 2 for cutting a tube manufactured continuously, the knife or knives (12 ', 12' ') being moved longitudinally at the time of cutting, synchronously with the advancement of the tube during manufacture, characterized in that the magnetic induction means is arranged so as to create a variable magnetic field in position, the movement of the field and consequently that of the core (9 ', 9' ') being controlled by the parting-off cycle. 7) Dispositif selon la revendication 6, caractérisé en ce que le moyen d'induction est monté sur un chariot (17) mobile longitudinalement dont le mouvement est asservi au cycle de tronçonnage.7) Device according to claim 6, characterized in that the induction means is mounted on a carriage (17) movable longitudinally whose movement is controlled by the cutting cycle. 8) Dispositif selon la revendication 6, caractérisé en ce que le moyen d'induction présente une position longitudinale fixe et en ce qu'un élément tubulaire (21) en matériau à forte susceptibilité magnétique est monté mobile longitudinalement autour du tube (4) à tronçonner, ledit élément tubulaire présentant une partie (22) à faible susceptibilité magnétique, de longeur de préférence au plus égale à celle du noyau (9''), tandis que le mouvement de l'élément tubulaire (21) est asservi au cycle de tronçonnage de telle sorte que le déplacement dudit élément tubulaire dans le champ magnétique du moyen d'induction entraîne le déplacement du noyau (9'') qui canalise les lignes d'induction traversant la partie à forte susceptibilité magnétique de l'élément tubulaire.8) Device according to claim 6, characterized in that the induction means has a fixed longitudinal position and in that a tubular element (21) of material with high magnetic susceptibility is mounted movable longitudinally around the tube (4) to cutting, said tubular element having a part (22) with low magnetic susceptibility, of length preferably at most equal to that of the core (9 ''), while the movement of the tubular element (21) is subject to the cycle of cutting so that the displacement of said tubular element in the magnetic field of the induction means causes the displacement of the core (9 '') which channels the induction lines crossing the part with high magnetic susceptibility of the tubular element. 9) Dispositif selon la revendication 6 et l'une quelconque des revendications 7 et 8, caractérisé en ce que le noyau (9',9'') et le contre-couteau (10',10'') sont reliés entre eux par un élément rigide (11,11') non magnétique qui est fixé de manière solidaire longitudinalement au noyau et au contre-couteau, tandis que le chariot (17), ou respectivement l'élément tubulaire (21), est asservi au mouvement du tube de manière telle que le noyau et donc le contre-couteau suivent de manière synchrone le mouvement du tube et du couteau pendant au moins l'action de ce dernier, un asservissement étant prévu pour ramener le chariot, ou respectivement l'élément tubulaire, et donc le contre-couteau, en position initiale après chaque tronçonnage pour un nouveau cycle de tronçonnage.9) Device according to claim 6 and any one of claims 7 and 8, characterized in that the core (9 ', 9'') and the counter knife (10', 10 '') are interconnected by a non-magnetic rigid element (11, 11 ′) which is fixed longitudinally to the core and the counter knife, while the carriage (17), or the tubular element (21), respectively, is slaved to the movement of the tube in such a way that the core and therefore the counter knife follow synchronously the movement of the tube and the knife during at least the action of the latter, a servo being provided to bring the carriage back, or respectively the tubular element, and therefore the counter knife, in the initial position after each cutting for a new cutting cycle. 10) Dispositif selon la revendication 6 et l'une quelconque des revendications 7 et 8, caractérisé en ce que le noyau (9',9'') et le contre-couteau (10',10'') sont reliés de manière telle que le contre-couteau puisse s'écarter librement d'une certaine longueur du noyau tandis que le chariot (17), ou respectivement l'élément tubulaire (21), est asservi au cycle de tronçonnage de manière telle que le noyau avance rapidement d'une certaine longueur avant l'action des couteaux en se rapprochant du contre-couteau dont le diamètre extérieur est de préférence sensiblement égal au diamètre intérieur du tube de telle sorte que ledit contre-couteau puisse être entraîné librement par le tube lui-même en s'écartant du noyau pendant le tronçonnage, un asservissement étant prévu pour ramener le chariot, ou respectivement l'élément tubulaire et donc le contre-couteau, en position initiale après chaque tronçonnage pour un nouveau cycle de tronçonnage.10) Device according to claim 6 and any one of claims 7 and 8, characterized in that the core (9 ', 9' ') and the counter knife (10', 10 '') are connected in such a way that the counter knife can move freely a certain length from the core while the carriage (17), or respectively the tubular element (21), is slaved to the cutting cycle so that the core advances rapidly d '' a certain length before the action of the knives by approaching the counter knife whose outer diameter is preferably substantially equal to the inner diameter of the tube so that said counter knife can be driven freely by the tube itself moving away from the core during cutting, a servo being provided to return the carriage, or respectively the tubular element and therefore the counter knife, to the initial position after each cutting for a new cutting cycle. 11) Dispositif selon la revendication 10, caractérisé en ce que le noyau (9',9'') et le contre-couteau (10',10'') sont reliés entre eux par un câble de telle sorte que l'avancement du noyau crée un mou dans ledit câble permettant une liberté d'avancement du contre-couteau et qu'un retour en arrière du noyau crée une tension du câble permettant de ramener ledit contre-­couteau.11) Device according to claim 10, characterized in that the core (9 ', 9' ') and the counter knife (10', 10 '') are interconnected by a cable so that the advancement of the core creates a slack in said cable allowing freedom of advancement of the counter knife and a backward movement of the core creates a tension of the cable allowing to bring said counter knife. 12) Dispositif selon la revendication 10, caractérisé en ce que le noyau (9',9'') et le contre-couteau (10',10'') sont reliés entre eux par une tringle rigide (11'') de liaison qui coulisse librement dans le noyau de telle sorte que l'avancement du noyau s'effectue par coulissement sans agir sur le contre-­couteau tandis qu'une butée (20) est prévue en amont du noyau de manière qu'un retour en arrière du noyau ramène le contre-couteau en tirant la tringle (11'') de liaison par l'intermédiaire de ladite butée (20).12) Device according to claim 10, characterized in that the core (9 ', 9'') and the counter knife (10', 10 '') are interconnected by a rigid rod (11 '') connecting which slides freely in the core so that the advancement of the core is effected by sliding without acting on the counter knife while a stop (20) is provided upstream of the core so that a backward movement of the core brings back the knife by pulling the link rod (11 '') through said stop (20).
EP86402427A 1985-10-30 1986-10-29 Tube-cutting apparatus Expired - Lifetime EP0225235B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516135 1985-10-30
FR8516135A FR2589384B1 (en) 1985-10-30 1985-10-30 DEVICE FOR CUTTING TUBES

Publications (2)

Publication Number Publication Date
EP0225235A1 true EP0225235A1 (en) 1987-06-10
EP0225235B1 EP0225235B1 (en) 1990-06-06

Family

ID=9324362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402427A Expired - Lifetime EP0225235B1 (en) 1985-10-30 1986-10-29 Tube-cutting apparatus

Country Status (7)

Country Link
US (2) US4889023A (en)
EP (1) EP0225235B1 (en)
CA (1) CA1304670C (en)
DE (2) DE225235T1 (en)
ES (1) ES2016269B3 (en)
FI (1) FI86265C (en)
FR (1) FR2589384B1 (en)

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EP0340082A1 (en) * 1988-04-25 1989-11-02 Lhomme Sa Apparatus for cutting tubes
WO2007072531A1 (en) * 2005-12-23 2007-06-28 Fabio Perini S.P.A. Machine for the production of tubes by winding strips of weblike material
IT202200005441A1 (en) * 2022-03-21 2022-06-21 Roberto Rossi AUTOMATIC CUTTING SYSTEM FOR CORE AND WAREHOUSE WITH FULLY AUTOMATIC FORMAT CHOICE

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FR2630367B2 (en) * 1985-10-30 1990-08-17 Lhomme Sa DEVICE FOR CUTTING TUBES
FR2589384B1 (en) * 1985-10-30 1988-01-22 Lhomme Sa DEVICE FOR CUTTING TUBES
FI88370C (en) * 1988-04-25 1993-05-10 Lhomme Sa tube cutting assembly
US5406870A (en) * 1993-09-13 1995-04-18 The Vulcan Tool Company Method and apparatus for cutting tubing
KR100434969B1 (en) * 2001-04-30 2004-06-07 주식회사 뉴보텍 Double wall wrinkles pipe cutting system of series injection molding process
KR100407541B1 (en) * 2001-04-30 2003-12-01 주식회사 뉴보텍 Cutting device of double wall wrinkles pipe cutting system of series injection molding process
KR100407540B1 (en) * 2001-04-30 2003-12-01 주식회사 뉴보텍 Injection length sensor of double wall wrinkles pipe cutting system of series injection molding process
US6752055B2 (en) * 2001-05-08 2004-06-22 John J. Borzym Turret type product receiver/unloader for slugless shear
DE10240520A1 (en) * 2002-09-03 2004-03-11 Khs Maschinen- Und Anlagenbau Ag Device for sleeve labeling machines
US9365344B2 (en) * 2004-06-17 2016-06-14 Caprosol Ag Method for the production of a can body, and can body
FI119419B2 (en) 2005-01-26 2011-10-13 Raumaster Paper Oy Method and apparatus for cutting a sleeve
ITFI20070230A1 (en) * 2007-10-22 2009-04-23 Perini Fabio Spa "TUBE WITH A MAGNETIC SUPPORT FOR THE WINDING SPINDLE"
CN101775969B (en) * 2010-01-11 2012-11-28 毛宏伟 Tower type combined drive pumping unit without guide wheel
DE102017127326B3 (en) 2017-11-20 2019-03-21 Rattunde & Co. Gmbh Pipe cutting machine with a controlled, flying cutting mandrel

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WO2007072531A1 (en) * 2005-12-23 2007-06-28 Fabio Perini S.P.A. Machine for the production of tubes by winding strips of weblike material
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IT202200005441A1 (en) * 2022-03-21 2022-06-21 Roberto Rossi AUTOMATIC CUTTING SYSTEM FOR CORE AND WAREHOUSE WITH FULLY AUTOMATIC FORMAT CHOICE

Also Published As

Publication number Publication date
FI864361A (en) 1987-05-01
US4889023A (en) 1989-12-26
FI864361A0 (en) 1986-10-27
FR2589384B1 (en) 1988-01-22
ES2016269B3 (en) 1990-11-01
EP0225235B1 (en) 1990-06-06
FI86265B (en) 1992-04-30
DE3671717D1 (en) 1990-07-12
FI86265C (en) 1992-08-10
DE225235T1 (en) 1987-09-24
FR2589384A1 (en) 1987-05-07
CA1304670C (en) 1992-07-07
US5111721A (en) 1992-05-12

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