EP0707527B1 - Cutting machine using a rotary wheel for cutting a flexible material consisting of a single sheet or a small mat of sheets, and method for adjusting said machine - Google Patents

Cutting machine using a rotary wheel for cutting a flexible material consisting of a single sheet or a small mat of sheets, and method for adjusting said machine Download PDF

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Publication number
EP0707527B1
EP0707527B1 EP19930914826 EP93914826A EP0707527B1 EP 0707527 B1 EP0707527 B1 EP 0707527B1 EP 19930914826 EP19930914826 EP 19930914826 EP 93914826 A EP93914826 A EP 93914826A EP 0707527 B1 EP0707527 B1 EP 0707527B1
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EP
European Patent Office
Prior art keywords
cutting
cutting wheel
wheel
whetting
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19930914826
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German (de)
French (fr)
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EP0707527A1 (en
Inventor
René BETOURNE
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Digital Control Inc
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Digital Control Inc
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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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0625—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by endless conveyors, e.g. belts
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B26D7/2635—Means for adjusting the position of the cutting member for circular cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B26F1/3826—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work using a rotary circular cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/0326—Controlling transverse register of web by moving the unwinding device
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/929—Particular nature of work or product
    • Y10S83/936—Cloth or leather
    • Y10S83/939—Cloth or leather with work support
    • Y10S83/94—Cutter moves along bar, bar moves perpendicularly
    • Y10S83/941—Work support comprising penetratable bed
    • 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
    • Y10T83/303—With tool sharpener or smoother

Definitions

  • the invention relates to a cutting machine by means of a rotary knob of flexible material in particular in the form of a single sheet or a small sheet mattress. It extends to a process for adjusting such a cutting machine.
  • Cutting machines with a rotary knobs are in common use to ensure the cutting flexible materials in the form a single sheet or a small sheet mattress.
  • FR 2,582,564, FR 2,582,247 and US 3,776,072 include, in first, a tray with a support surface for the flexible material, and a cutting head with a wheel cutting, of a rotary drive motor of said wheel, and sequential sharpening means of this last.
  • horizontal drive means of the cutting head are adapted to move the latter above the platform along two axes of movement orthogonal, and rotational drive means are adapted to rotate said head about an axis vertical tangential control.
  • these cutting machines are provided with means for holding the flexible material on the support plate, intended to maintain this flexible material in a fixed position during the entire process of cutting.
  • These holding means conventionally include a support surface consisting of a pile of hairs having a significant number of vertical passages of air circulation, and vacuum means adapted to create a depression to maintain vacuum plating the flexible material on the surface support.
  • the present invention aims to overcome these disadvantages and its main objective is to provide cutting machine of the type comprising a rotary wheel for which the maintenance of the flexible material on the support surface requires no special device holding such as suction means ...
  • Another object of the invention is to provide a cutting machine with a device advanced sharpening providing excellent quality sharpening.
  • Another object of the invention is to provide a cutting machine designed so that the material flexible to be cut is fed automatically on the support surface.
  • Another object of the invention is to provide a cutting machine that automatically transverse positioning of the flexible material on the support surface and performing automated management of the position of this flexible material relative to the head of chopped off.
  • such a machine allows get rid of any maintenance of the flexible material by suction or any other process, so that the simple adhesion of the flexible material to its support in the case of a single sheet, or the adhesion of layers between them in the case of small mattresses, suffices maintenance of the flexible material during cutting.
  • Such sharpening means allow to obtain a perfect quality of sharpening which tends to further reduce the cutting force.
  • the sharpening members are arranged so that their sharpening faces form an angle of different inclination with the corresponding face of the wheel and that the contact surface between the organ for sharpening and the wheel either less than that between the other sharpening member and said wheel.
  • the contact area between each face sharpening of a sharpening member and the face corresponding to the wheel is offset from the center of said sharpening faces, so that in contact, the rotation of said dial causes that of said sharpening devices.
  • a pressing bar is associated at the gantry and is equipped with means of vertical movement able to apply it to the carpet, the means of the gantry and the carpet being adapted for move said belts and gantry in synchronism.
  • the cutting machine shown schematically in Figure 9 is intended for cutting automatic of a flexible material presenting itself under the form of a single sheet or a small mattress leaves.
  • This machine is composed of a table cutting, means for feeding a strip of material flexible, with a cutting head carrying a cutting wheel, and means for translational movement of the head of cut that include a moving gantry longitudinally along the cutting table, and a cart mounted on the gantry and moving longitudinally on the latter, i.e. orthogonally to the direction of movement of said gantry.
  • this cutting machine includes conventionally a digital control unit (not shown) adapted to manage all parameters of operation of said machine.
  • the cutting table has a frame (not shown) carrying an endless belt 1 made of a material such as P.V.C., mounted around two rollers 2, 3, one of said rollers being associated with motor means of any type known per se (not shown) suitable for scrolling the carpet 1.
  • a frame (not shown) carrying an endless belt 1 made of a material such as P.V.C., mounted around two rollers 2, 3, one of said rollers being associated with motor means of any type known per se (not shown) suitable for scrolling the carpet 1.
  • This carpet 1 is further coated on the entire surface of a foam material mattress expanded, such as polyurethane foam, able to allow the penetration of the wheel.
  • foam material mattress expanded such as polyurethane foam
  • This foam mattress intended to be changed regularly is, for example, fixed on the carpet using double sided tape.
  • the cutting machine further comprises means for feeding a strip of flexible material 4 packaged in the form of a roll 5.
  • These supply means include, in first, a frame 6 supporting the roll 5 of material flexible, arranged in the longitudinal extension of the mat 1.
  • a bar press 7 associated with the gantry and extending parallel to the latter.
  • This pressing bar 7 is carried towards each of its ends by the rod of a pneumatic cylinder 8 arranged vertically, the body of which is integral with the gantry, said jacks being adapted for come to tackle during their deployment, said bar pressing on the belt 1.
  • the supply means finally include transverse centering means adapted to center the strip of material 4 relative to the mat 1. These means of centering include in the first place means of detection of one of the lateral edges of the strip of material flexible 4.
  • These detection means consist of example in transmitter / receiver cells fixed on the branches of a stirrup 9 disposed between the roller 5 of flexible material and the mat 1 substantially in the same plane horizontal than said mat.
  • This stirrup 9 is, moreover, itself fixed on a guide bar 10 on which is brought to pass the strip of flexible material 4.
  • the means of a hundred rage include, in in addition, means for transversely moving the frame 6 support of the roll 5 of flexible material, subject to the means above.
  • these displacement means consist of a worm driven in rotation by means of a motor 11 by means of a gear reducer 12, 13.
  • the gantry 14 of displacement in longitudinal translation of the cutting head is about driven him in a classic way by toothed belts by means of a direct current motor and reduction, along two longitudinal rails (not shown) arranged on either side of the carpet 1.
  • the carriage 15 is also driven on along the gantry by a notched belt system at the by means of a DC motor and reduction.
  • a pneumatic cylinder 16 arranged vertically and on the end of the rod 16b from which is fixed a platform 17 cutting head holder 18.
  • This platform 17 is guided, during actuation of the actuator 16, by means of two columns of guide 19, 20 connecting two plates 21, 22 arranged above and below said platform, the plate lower 22 being secured to the cylinder body 16a 16.
  • upper and lower stop means are adapted for allow manual adjustment of the cylinder stroke pneumatic 16.
  • the upper stop means are constituted a screw 23 housed in a threaded bore formed in the upper plate 21 plumb with the rod 16b of the jack.
  • the low stop means are consisting of a screw 24 housed in a threaded bore formed in the platform 17 and adapted to come up against on the lower plate 23 during the retraction of the jack 16.
  • the upper plate 21 has a hole 25 plumb of said screw.
  • the platform 17 also carries the means for rotating the cutting head around a vertical axis intended to orient the wheel in the direction of travel.
  • These training means include, in first, a motor 26 on the shaft of which is mounted a pinion 27 coupled by a drive belt 28 to a toothed pulley 29 integral in translation and free in rotation relative to the platform 17.
  • the training means include, in in addition, a vertical shaft 30 secured to the toothed pulley 29 and centered on the latter, said shaft extending vertically under platform 17 and being provided with level of its lower end of a plate 31 under which is screwed the cutting head 18.
  • this shaft 30 is hollow and houses the compressed air supply hoses and electrical wires necessary for the operation of the head cutting 18.
  • the cutting head is composed of two elements: a fixed upper element 32 secured to the plate 31, and a lower element, or drawer 33, movable relative to the fixed element 32 according to the direction of movement of the cutting head 18.
  • the fixed element 32 has a reservation inside which an engine is housed electric 34 high speed drive wheel cutting.
  • This motor 34 is arranged horizontally and its motor shaft rotates a pulley 35.
  • the movable drawer 33 is in turn provided, on the underside, a recess 36 in which is housed the wheel 37 arranged to project under said drawer.
  • This wheel 37 is carried by a horizontal shaft 38 rotatably mounted by means of bearings such as 39 to the interior of a bore 40 formed in the drawer 33.
  • This shaft 38 also carries a pulley 41 coupled to the pulley 35 of the motor 34 by a belt 56 consisting of an O-ring.
  • the motor 34 and the shaft 38 carrying the wheel 37 are arranged so that the axis of rotation of said wheel is offset horizontally by a distance D adjustable by displacement of drawer 33, with respect to the vertical axis of symmetry of the shaft 30 which constitutes the tangential servo axis of this wheel.
  • the motor 34 is suitable for rotate the dial 37 in the same direction as the direction of deployment of the cutting head 18 and with a linear peripheral speed greater than that of said cutting head.
  • this motor 34 has a torque substantially between 4 and 6 cm.N and is suitable for drive the dial 37 at a linear speed greater than 10 m / s.
  • This engine is also equipped with a variable speed drive which can consist of a variator intensity or as a simple transformer with n positions making it possible to obtain n different speeds, with a view to adjust the speed of rotation of the dial 37 according cutting parameters (type of material to be cut, thickness, number of sheets ). It should be noted that this speed can also be changed by changing the ratio of the pulleys 35, 41.
  • a variable speed drive which can consist of a variator intensity or as a simple transformer with n positions making it possible to obtain n different speeds, with a view to adjust the speed of rotation of the dial 37 according cutting parameters (type of material to be cut, thickness, number of sheets ). It should be noted that this speed can also be changed by changing the ratio of the pulleys 35, 41.
  • the wheel 37 has an octagonal shape composed of four sides having the shape of arcs of circle connected two by two by linear sides.
  • Such a wheel 37 has the advantage of don't clog up and provide better results from cutting, especially with relatively hard materials such as than vinyl or synthetic materials of a certain thickness.
  • the movable drawer 33 also carries means for sharpening the wheel 37 comprising two grinding wheels 42, 43 each mounted on the end of housed axes 44, 45 in blind holes 46, 47 formed on either side of the wheel 37.
  • One of these grinding wheels 42 is intended for give the wheel its cutting angle, while the other 43 is intended to perform the thread cutter function.
  • the blind holes 46, 47 are provided so that the sharpening faces of these grinding wheels 42, 43 form a angle of inclination different from the face wheel 37.
  • blind holes 46, 47 are arranged so that the sharpening face of the grinding wheel sharpening 42 defines an angle substantially equal to 20 degrees with the corresponding face of the dial 37, and that the sharpening face of the thread cutting wheel 43 delimits a angle substantially equal to 5 degrees with the other face of the scroll wheel.
  • blind holes 46, 47 are arranged so that the contact of the sharpening faces of the grinding wheels 42, 43 is off-center so that on contact, the rotation of the wheel 37 causes that of said grindstones.
  • the means of movement of these grinding wheels 42, 43 intended to apply them against the wheels are pneumatic and include pipes such as 48, 49 for compressed air supply opening at the bottom of the blind holes 46, 47.
  • the pressure drop in these pipes 48, 49 is, in additionally, adapted so that the compressed air pressure causing the displacement of the thread cutting wheel 43 either lower than that causing the displacement of the grinding wheel sharpening 42.
  • This intermediate piece 50 has a central opening 51 while the drawer has a tenon 52 of length less than that of the opening 51, housed in the latter, maintaining said drawer being provided by a plate 53 resting on the part intermediate 50 and fixed to stud 52. Displacements themselves are insured manually by means of a screw 54 cooperating with a tapped bore horizontally in the tenon 52 so that the screwing or unscrewing said screw causes said sliding tenon inside opening 51.
  • springs such as 55 are arranged to provide a effective movement of the pin 52 when unscrewing the screw 54.
  • This screw 54 is used, once the adjustment of the bottom stop made according to the thickness of the material to be cut, so that the point contact switch of the thumbwheel 37 is located in the vicinity of the tangential and slightly offset servo axis forward with respect to this axis.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Control Of Cutting Processes (AREA)

Abstract

A machine for cutting a flexible material by means of a cutting wheel (37) rotated by a motor, said wheel and said motor being supported on a cutting head (18) moving horizontally along two orthogonal axes and revolving about a vertical tangential control axis. The machine further includes a bearing plate covered with a mat engaged by the cutting wheel (37), a member (24) for setting the cutting depth of the wheel in the mat, and a member for setting the horizontal spacing between the vertical tangential control axis and the rotational axis of the wheel (37) so that said cutting wheel engages the mat at a forward contact point close to said tangential control axis.

Description

L'invention concerne une machine de découpe au moyen d'une molette rotative d'une matière souple se présentant notamment sous la forme d'une feuille unique ou d'un petit matelas de feuilles. Elle s'étend à un procédé de réglage d'une telle machine de découpe.The invention relates to a cutting machine by means of a rotary knob of flexible material in particular in the form of a single sheet or a small sheet mattress. It extends to a process for adjusting such a cutting machine.

Les machines de découpe dotées d'une molette rotative sont d'un usage courant pour assurer la découpe des matières souples se présentant sous la forme d'une feuille unique ou d'un petit matelas de feuilles. De telles machines décrites notamment dans les brevets FR 2.582.564, FR 2.582.247 et US 3.776.072 comportent, en premier lieu, un plateau doté d'une surface de support de la matière souple, et une tête de coupe dotée d'une molette coupante, d'un moteur d'entraínement en rotation de ladite molette, et de moyens d'affûtage séquentiel de cette dernière. En outre, des moyens d'entraínement horizontal de la tête de coupe sont adaptés pour déplacer cette dernière au-dessus du plateau selon deux axes de déplacement orthogonaux, et des moyens d'entraínement en rotation sont adaptés pour faire tourner ladite tête autour d'un axe vertical d'asservissement tangentiel.Cutting machines with a rotary knobs are in common use to ensure the cutting flexible materials in the form a single sheet or a small sheet mattress. Of such machines described in particular in patents FR 2,582,564, FR 2,582,247 and US 3,776,072 include, in first, a tray with a support surface for the flexible material, and a cutting head with a wheel cutting, of a rotary drive motor of said wheel, and sequential sharpening means of this last. In addition, horizontal drive means of the cutting head are adapted to move the latter above the platform along two axes of movement orthogonal, and rotational drive means are adapted to rotate said head about an axis vertical tangential control.

Par ailleurs, ces machines de découpe sont dotées de moyens de maintien de la matière souple sur le plateau support, destinés à maintenir cette matière souple dans une position fixe pendant la totalité du processus de découpage. Ces moyens de maintien comprennent classiquement une surface de support constituée d'un tapis de poils possédant un nombre important de passages verticaux de circulation d'air, et des moyens de mise en dépression adaptés pour créer une dépression permettant de maintenir plaquée par aspiration la matière souple sur la surface support.Furthermore, these cutting machines are provided with means for holding the flexible material on the support plate, intended to maintain this flexible material in a fixed position during the entire process of cutting. These holding means conventionally include a support surface consisting of a pile of hairs having a significant number of vertical passages of air circulation, and vacuum means adapted to create a depression to maintain vacuum plating the flexible material on the surface support.

Si de tels moyens donnent entière satisfaction quant au maintien de la matière souple, lors du découpage ce cette dernière ils présentent toutefois deux inconvénients principaux. En effet, et en premier lieu, ils nécessitent déquiper chaque machine de découpe d'une surface de support spécifique et surtout de moyens d'aspiration, d'une part, augmentant le prix de revient de telles machines, et, d'autre part, dont le coût de fonctionnement du point de vue énergétique est loin d'être négligeable. Par ailleurs, ce maintien par aspiration oblige à interposer, d'une part, une feuille perforée entre la surface support et la matière souple de façon que cette dernière ne soit pas aspirée, et d'autre part, une deuxième feuille sur la matière souple en vue d'assurer l'étanchéité à l'air. Or, ces feuilles qui sont obligatoirement découpées en même temps que la matière souple doivent donc être remplacées après chaque découpe et constituent des produits consommables dont le coût n'est pas négligeable.If such means give whole satisfaction with the maintenance of the flexible material, when of the cutting this latter they present however two main drawbacks. Indeed, and first place, they require equipping each cutting machine a specific support surface and above all means on the one hand, increasing the cost price by such machines, and, on the other hand, the cost of energy efficient is far from negligible. Furthermore, this retention by aspiration requires interposing, on the one hand, a perforated sheet between the support surface and the flexible material so that this the latter is not vacuumed, and on the other hand, a second sheet on flexible material for sealing to the air. Now, these sheets which are necessarily cut at the same time as the flexible material must therefore be replaced after each cut and constitute consumable products whose cost is not negligible.

La présente invention vise à pallier ces inconvénients et a pour principal objectif de fournir une machine de découpe du type comportant une molette rotative pour laquelle le maintien de la matière souple sur la surface-support ne nécessite aucun dispositif particulier de maintien tel que moyen d'aspiration...The present invention aims to overcome these disadvantages and its main objective is to provide cutting machine of the type comprising a rotary wheel for which the maintenance of the flexible material on the support surface requires no special device holding such as suction means ...

Un autre objectif de l'invention est de fournir une machine de découpe dotée d'un dispositif d'affûtage perfectionné fournissant une excellente qualité d'affûtage.Another object of the invention is to provide a cutting machine with a device advanced sharpening providing excellent quality sharpening.

Un autre objectif de l'invention est de fournir une machine de découpe conçue pour que la matière souple à découper soit alimentée automatiquement sur la surface-support.Another object of the invention is to provide a cutting machine designed so that the material flexible to be cut is fed automatically on the support surface.

Un autre objectif de l'invention est de founir une machine de découpe assurant automatiquement le positionnement transversal de la matière souple sur la surface-support et effectuant une gestion automatisée de la position de cette matière souple relativement à la tête de coupe.Another object of the invention is to provide a cutting machine that automatically transverse positioning of the flexible material on the support surface and performing automated management of the position of this flexible material relative to the head of chopped off.

A cet effet, l'invention vise une machine de découpe d'une matière souple se présentant notamment sous la forme d'une feuille unique ou d'un petit matelas de feuilles, comprenant :

  • un plateau comportant une surface de support de la matière souple à découper,
  • une tête de coupe dotée d'une molette coupante, d'un moteur d'entraínement en rotation de ladite molette, et de moyens d'affûtage séquentiel de cette dernière,
  • des moyens d'entraínement horizontal de la tête de coupe aptes à la déplacer au-dessus du plateau selon deux axes de déplacement orthogonaux,
  • et des moyens d'entraínement en rotation de la tête de coupe autour d'un axe vertical dit d'asservissement tangentiel.
To this end, the invention relates to a machine for cutting a flexible material, in particular in the form of a single sheet or a small sheet mattress, comprising:
  • a tray comprising a support surface for the flexible material to be cut,
  • a cutting head provided with a cutting wheel, a motor for rotating said wheel, and means for sequentially sharpening the latter,
  • means for horizontal drive of the cutting head capable of moving it above the plate along two orthogonal axes of movement,
  • and means for driving the cutting head in rotation about a vertical axis called tangential control.

Selon l'invention, cette machine de découpe se caractérise en ce que :

  • le plateau est recouvert d'une matière-support d'une épaisseur prédéterminée apte à permettre la pénétration de la molette,
  • la tête de coupe est associée à un chariot auquel elle est reliée par l'intermédiaire de moyens de déplacement vertical aptes à déplacer ladite tête entre une position haute où la molette se trouve à distance au-dessus du plateau et une position basse où ladite molette pénètre d'une profondeur prédéterminée dans la matière-support,
  • des moyens de réglage vertical sont adaptés pour permettre d'ajuster la position basse de la tête de coupe, et, par conséquent, la profondeur de pénétration de la molette dans la matière-support,
  • le moteur d'entraínement en rotation de la molette est porté par la tête de coupe et apte à entraíner ladite molette à une vitesse supérieure à 5000 t/mn, lesdits moteur et molette étant dotés respectivement d'un arbre-moteur et d'un axe de rotation parallèles et horizontaux,
  • les moyens d'entraínement en rotation de la tête de coupe sont agencés pour que l'axe d'asservissement tangentiel de la molette soit décalé horizontalement d'une distance (D) par rapport à l'axe de rotation de cette dernière, de façon que ladite molette pénètre dans la matière-support au niveau d'un point de contact avant situé au voisinage dudit axe d'asservissement tangentiel,
  • des moyens de réglage horizontal sont adaptés pour permettre d'ajuster la distance (D) séparant l'axe d'asservissement tangentiel de l'axe de rotation de la molette.
According to the invention, this cutting machine is characterized in that:
  • the plate is covered with a support material of a predetermined thickness capable of permitting penetration of the wheel,
  • the cutting head is associated with a carriage to which it is connected by means of vertical displacement means able to move said head between a high position where the wheel is at a distance above the table and a low position where said wheel penetrates a predetermined depth into the support material,
  • vertical adjustment means are adapted to allow the low position of the cutting head to be adjusted, and therefore the depth of penetration of the wheel in the support material,
  • the drive motor in rotation of the wheel is carried by the cutting head and adapted to drive said wheel at a speed greater than 5000 rpm, said motor and wheel being respectively provided with a motor shaft and a parallel and horizontal axis of rotation,
  • the means for rotating the cutting head are arranged so that the tangential servo axis of the wheel is horizontally offset by a distance (D) relative to the axis of rotation of the latter, so that said wheel enters the support material at a front contact point located in the vicinity of said tangential servo axis,
  • horizontal adjustment means are adapted to adjust the distance (D) separating the tangential servo axis from the axis of rotation of the thumb wheel.

L'ensemble de ces caractéristiques concourt à fournir une machine de découpe ne créant aucun effort sur la matière souple autre que l'effort de coupe, qui est en outre, extrêmement atténué du fait de la vitesse de rotation de la molette, de l'affûtage régulier de cette dernière, et de la position du point de contact avant de ladite molette situé au voisinage de l'axe d'asservissement tangentiel.All of these characteristics combine to provide a cutting machine creating no effort on the flexible material other than the cutting force, which is in in addition, extremely attenuated due to the speed of rotation of the wheel, regular sharpening of this last, and the position of the contact point before said wheel located in the vicinity of the servo axis tangential.

Concrètement, une telle machine permet de s'affranchir de tout maintien de la matière souple par aspiration ou tout autre procédé, de telle sorte que la simple adhérence de la matière souple sur son support dans le cas d'une simple feuille, ou l'adhérence de couches entre elles dans le cas de petits matelas, suffit au maintien de la matière souple lors de la coupe.Concretely, such a machine allows get rid of any maintenance of the flexible material by suction or any other process, so that the simple adhesion of the flexible material to its support in the case of a single sheet, or the adhesion of layers between them in the case of small mattresses, suffices maintenance of the flexible material during cutting.

Le procédé de réglage de la position de la molette d'une telle machine de découpe consiste avantageusement :

  • à déterminer une profondeur de pénétration donnée par ajustement des moyens de réglage de la position basse de la tête de coupe,
  • à amener la molette en butée basse, cette dernière étant entraínée en rotation, de façon à obtenir une première ligne d'impact,
  • à remonter la molette et à faire subir une rotation de 90 degrés à la tête de coupe,
  • à redescendre la molette en butée basse, cette dernière étant entraínée en rotation, de façon à obtenir une deuxième ligne d'impact orthogonale à la première,
  • à examiner les lignes d'impact ce façon à déterminer la longueur ce ces lignes s'tendant au-delà de leur point de croisement,
  • et à actionner les moyens de réglage horizontal dans un sens ou dans l'autre de façon à obtenir une longueur de dépassement des lignes d'impact au-delà de leur point de croisement sensiblement comprise entre 0,5 mm et 2 mm.
The method for adjusting the position of the wheel of such a cutting machine advantageously consists of:
  • determining a given depth of penetration by adjusting the means for adjusting the low position of the cutting head,
  • to bring the wheel in low stop, the latter being rotated, so as to obtain a first line of impact,
  • to reassemble the wheel and to subject the cutting head to a 90 degree rotation,
  • to descend the wheel in low stop, the latter being driven in rotation, so as to obtain a second impact line orthogonal to the first,
  • to examine the impact lines in this way to determine the length of these lines extending beyond their crossing point,
  • and actuating the horizontal adjustment means in one direction or the other so as to obtain a protruding length of the impact lines beyond their crossing point substantially between 0.5 mm and 2 mm.

Ainsi, quelle que soit la position de la butée basse de la molette et donc sa profondeur de pénétration dans la matière-support, on obtient un positionnement du point de contact avant de la molette sensiblement sur l'axe d'asservissement tangentiel, avec toutefois un léger décalage vers l'avant par rapport à cet axe.So whatever the position of the lower stop of the wheel and therefore its depth of penetration into the support material, we obtain a positioning of the contact point before the thumb wheel substantially on the tangential servo axis, with however a slight forward shift from this axis.

De ce fait, on obtient un effort de coupe extrêmement atténué (le point de contact avant étant sensiblement sur l'axe d'asservissement tangentiel, on ne "hache" pas la matière souple) tout en se garantissant contre le risque de laisser quelques fils de matière souple accrochés (léger décalage vers l'avant du point de contact avant de la molette).Therefore, a cutting force is obtained extremely attenuated (the front point of contact being substantially on the tangential servo axis, we do not "ax" not the soft material) while ensuring against the risk of leaving a few threads of flexible material hung (slight shift forward of the point of contact front of the dial).

Selon une autre caractéristique de l'invention, les moyens d'affûtage comprennent :

  • deux organes d'aiguisage dotés chacun d'une face d'aiguisage et disposés respectivement chacun en regard d'une face de la molette, un desdits organes d'aiguisage étant adapté pour conférer à la molette son angle de coupe, et l'autre organe d'aiguisage étant adapté pour assurer la fonction de coupe-fil,
  • des moyens de déplacement des organes d'aiguisage aptes à venir appliquer leur face d'aiguisage périodiquement et pendant un temps prédéterminé contre la face correspondante de la molette.
According to another characteristic of the invention, the sharpening means comprise:
  • two sharpening members each provided with a sharpening face and disposed respectively each opposite a face of the wheel, one of said sharpening members being adapted to give the wheel its cutting angle, and the other sharpening member being adapted to perform the function of wire cutter,
  • means for moving the sharpening members capable of coming to apply their sharpening face periodically and for a predetermined time against the corresponding face of the wheel.

De tels moyens d'affûtage permettent d'obtenir une parfaite qualité d'affûtage qui tend à diminuer encore l'effort de coupe.Such sharpening means allow to obtain a perfect quality of sharpening which tends to further reduce the cutting force.

En outre, selon un mode de réalisation préférentiel, les organes d'aiguisage sont disposés de façon que leurs faces d'aiguisage forment un angle d'inclinaison différent avec la face correspondante de la molette et que la surface de contact entre l'organe d'aiguisage destiné à l'affûtage et la molette soit inférieure à celle entre l'autre organe d'aiguisage et ladite molette.In addition, according to one embodiment preferential, the sharpening members are arranged so that their sharpening faces form an angle of different inclination with the corresponding face of the wheel and that the contact surface between the organ for sharpening and the wheel either less than that between the other sharpening member and said wheel.

De plus, et selon une autre caractéristique de l'invention, la zone de contact entre chaque face d'aiguisage d'un organe d'aiguisage et la face correspondante de la molette est décentrée par rapport au centre desdites faces d'aiguisage, de façon qu'au contact, la rotation de ladite molette entraíne celle desdits organes d'aiguisage.In addition, and according to another characteristic of the invention, the contact area between each face sharpening of a sharpening member and the face corresponding to the wheel is offset from the center of said sharpening faces, so that in contact, the rotation of said dial causes that of said sharpening devices.

Par ailleurs, selon un mode de réalisation préférentiel, la tête de coupe comporte :

  • un élément, dit fixe, porté par le chariot par l'intermédiaire des moyens de déplacement vertical, et sur lequel est solidarisé le moteur d'entraínement en rotation de la molette,
  • un élément, dit tiroir, mobile, portant la molette,
  • et des moyens manuels de déplacement relatif du tiroir par rapport à l'élément fixe, adaptés pour ajuster la distance (D).
Furthermore, according to a preferred embodiment, the cutting head comprises:
  • an element, said to be fixed, carried by the carriage by means of vertical displacement means, and on which the motor for rotating the wheel is secured,
  • an element, called drawer, mobile, carrying the wheel,
  • and manual means for relative movement of the drawer relative to the fixed element, adapted to adjust the distance (D).

De plus, selon une autre caractéristique de l'invention,

  • la molette est portée par un arbre horizontal sur lequel est montée une poulie, s'étendant selon un axe orthogonal à l'axe de déplacement du tiroir,
  • le moteur d'entraínement en rotation de la molette comporte un arbre-moteur portant une poulie, parallèle à l'arbre de la molette,
  • une courroie d'entraínement constituée d'un joint torique est montée autour desdites poulies.
In addition, according to another characteristic of the invention,
  • the wheel is carried by a horizontal shaft on which a pulley is mounted, extending along an axis orthogonal to the axis of movement of the drawer,
  • the motor for rotating the wheel comprises a motor shaft carrying a pulley, parallel to the wheel shaft,
  • a drive belt consisting of an O-ring is mounted around said pulleys.

Cette disposition utilisant un joint torique donc élastique, permet d'absorber de façon simple les débattements du tiroir. This arrangement using a joint therefore elastic toric, allows to absorb in a simple way drawer deflections.

Par ailleurs, selon des modes de réalisation préférentiels de l'invention visant à fournir une machine de découpe dont la matière souple est alimentée automatiquement sur la surface-support, en premier lieu :

  • le plateau est constitué d'un tapis sans fin présentant une surface supérieure de support et monté autour de deux rouleaux,
  • la matière-support est solidarisée sur le tapis sur toute la surface de ce dernier,
  • des moyens d'entraínement sont adaptés pour faire défiler une longueur donnée de tapis à la commande.
Furthermore, according to preferred embodiments of the invention aimed at providing a cutting machine, the flexible material of which is automatically fed onto the support surface, firstly:
  • the plate consists of an endless belt having an upper support surface and mounted around two rollers,
  • the support material is secured to the carpet over the entire surface of the latter,
  • drive means are adapted to scroll a given length of carpet when ordered.

De plus, une barre de pressage est associée au portique et est dotée de moyens de déplacement vertical aptes à venir l'appliquer sur le tapis, les moyens d'entraínement du portique et du tapis étant adaptés pour déplacer en synchronisme lesdits tapis et portique.In addition, a pressing bar is associated at the gantry and is equipped with means of vertical movement able to apply it to the carpet, the means of the gantry and the carpet being adapted for move said belts and gantry in synchronism.

En outre, la machine de découpe est dotée préférentiellement de moyens adaptés pour assurer automatiquement le positionnement transversal de la matière souple sur la surface-support, lors de l'alimentation de cette dernière, lesdit moyens comprenant :

  • des moyens-supports d'un rouleau de dévidage d'une feuille de matière souple adaptés pour permettre de délivrer ladite feuille vers le tapis,
  • des moyens de détection d'un bord latéral de la feuille de matière souple dévidée vers le tapis,
  • et des moyens de déplacement transversal des moyens-supports du rouleau de dévidage adaptés pour positionner ledit rouleau en fonction des informations délivrées par les moyens de détection.
In addition, the cutting machine is preferably provided with means suitable for automatically ensuring the transverse positioning of the flexible material on the support surface, during the supply of the latter, the said means comprising:
  • support means for a roll for unwinding a sheet of flexible material adapted to enable said sheet to be delivered to the carpet,
  • means for detecting a lateral edge of the sheet of flexible material unwound towards the mat,
  • and means for transversely displacing the support means of the unwinding roller adapted to position said roller as a function of the information delivered by the detection means.

D'autres caractéristiques, buts et avantages de l'invention ressortiront de la description détaillée qui suit en référence aux dessins annexés qui en représentent, à titre d'exemple non limitatif, un mode de réalisation préférentiel. Sur ces dessins qui font partie intégrante de la présente description :

  • la figure 1 est une vue en perspective partielle de la tête de coupe d'une machine ce découpe conforme à l'invention, et des moyens de déplacement horizontal de cette tête de coupe,
  • la figure 2 est une coupe partielle par un plan vertical A de la figure 1 représentant la fixation de cette tête de coupe sur ses moyens de déplacement vertical,
  • la figure 3 est une vue latérale de cette tête de coupe,
  • la figure 4 en est une autre vue latérale représentant la face opposée à celle représentée à la figure 3,
  • la figure 5 est une coupe longitudinale par un plan vertical B de cette tête de coupe,
  • la figure 6 en est une coupe transversale par un plan horizontal C,
  • la figure 7 en est une coupe transversale par un plan horizontal D,
  • la figure 8 en est une coupe transversale par un plan horizontal E,
  • la figure 9 représente schématiquement une machine de découpe conforme à l'invention,
  • et la figure 10 est un schéma représentant les moyens de déplacement transversal du rouleau porteur de matière souple.
Other characteristics, objects and advantages of the invention will emerge from the detailed description which follows with reference to the appended drawings which represent, by way of non-limiting example, a preferred embodiment. On these drawings which form an integral part of this description:
  • FIG. 1 is a partial perspective view of the cutting head of a machine, this cutting according to the invention, and means of horizontal displacement of this cutting head,
  • FIG. 2 is a partial section through a vertical plane A in FIG. 1 showing the attachment of this cutting head to its vertical displacement means,
  • FIG. 3 is a side view of this cutting head,
  • FIG. 4 is another side view showing the face opposite to that shown in FIG. 3,
  • FIG. 5 is a longitudinal section through a vertical plane B of this cutting head,
  • FIG. 6 is a cross section thereof through a horizontal plane C,
  • FIG. 7 is a cross section thereof through a horizontal plane D,
  • FIG. 8 is a cross section thereof through a horizontal plane E,
  • FIG. 9 schematically represents a cutting machine according to the invention,
  • and FIG. 10 is a diagram showing the means for transversely moving the roller carrying flexible material.

La machine de découpe représentée schématiquement à la figure 9 est destinée à la découpe automatique d'une matière souple se présentant sous la forme d'une feuille unique ou d'un petit matelas de feuilles.The cutting machine shown schematically in Figure 9 is intended for cutting automatic of a flexible material presenting itself under the form of a single sheet or a small mattress leaves.

Cette machine est composée d'une table de coupe, de moyens d'alimentation d'une bande de matériau souple, d'une tête de coupe portant une molette de coupe, et de moyens de déplacement en translation de la tête de coupe qui comprennent un portique se déplaçant longitudinalement le long de la table de coupe, et un chariot monté sur le portique et se déplaçant longitudinalement sur ce dernier, c'est-à-dire orthogonalement par rapport au sens de déplacement dudit portique. Enfin, cette machine de découpe comprend classiquement une unité de commande numérique (non représentée) adaptée pour gérer la totalité des paramètres de fonctionnement de ladite machine.This machine is composed of a table cutting, means for feeding a strip of material flexible, with a cutting head carrying a cutting wheel, and means for translational movement of the head of cut that include a moving gantry longitudinally along the cutting table, and a cart mounted on the gantry and moving longitudinally on the latter, i.e. orthogonally to the direction of movement of said gantry. Finally, this cutting machine includes conventionally a digital control unit (not shown) adapted to manage all parameters of operation of said machine.

En premier lieu, la table de coupe comporte une ossature (non représentée) portant un tapis sans fin 1 en un matériau tel que du P.V.C., monté autour de deux rouleaux 2, 3, un desdits rouleaux étant associé à des moyens moteurs de tout type connu en soi (non représentés) adaptés pour faire défiler le tapis 1.First, the cutting table has a frame (not shown) carrying an endless belt 1 made of a material such as P.V.C., mounted around two rollers 2, 3, one of said rollers being associated with motor means of any type known per se (not shown) suitable for scrolling the carpet 1.

Ce tapis 1 est, en outre, revêtu sur la totalité de sa surface d'un matelas de mousse en matériau expansé, tel que mousse de polyuréthane, apte à permettre la pénétration de la molette. Ce matelas de mousse destiné à être changé régulièrement est, par exemple, fixé sur le tapis au moyen d'un ruban adhésif double face.This carpet 1 is further coated on the entire surface of a foam material mattress expanded, such as polyurethane foam, able to allow the penetration of the wheel. This foam mattress intended to be changed regularly is, for example, fixed on the carpet using double sided tape.

La machine de découpe comporte, en outre, des moyens d'alimentation en une bande en matière souple 4 conditionnée sous la forme d'un rouleau 5.The cutting machine further comprises means for feeding a strip of flexible material 4 packaged in the form of a roll 5.

Ces moyens d'alimentation comprennent, en premier lieu, un cadre 6 support du rouleau 5 de matière souple, disposé dans le prolongement longitudinal du tapis 1.These supply means include, in first, a frame 6 supporting the roll 5 of material flexible, arranged in the longitudinal extension of the mat 1.

Ils comprennent, en second lieu, une barre de pressage 7 associée au portique et s'étendant parallèlement à ce dernier. Cette barre de pressage 7 est portée vers chacune de ses extrémités par la tige d'un vérin pneumatique 8 agencé verticalement, dont le corps est solidaire du portique, lesdits vérins étant adaptés pour venir plaquer lors de leur déploiement, ladite barre de pressage sur le tapis 1.Secondly, they include a bar press 7 associated with the gantry and extending parallel to the latter. This pressing bar 7 is carried towards each of its ends by the rod of a pneumatic cylinder 8 arranged vertically, the body of which is integral with the gantry, said jacks being adapted for come to tackle during their deployment, said bar pressing on the belt 1.

Une fois une largeur de matière souple 4 à découper coincée entre la barre de pressage 7 et le tapis 1, une longueur de matière souple peut alors être amenée à se dérouler sur la surface supérieure de ce tapis en commandant simultanément et en synchronisme un déplacement du portique et un défilement du tapis 1. Once a width of flexible material 4 to cut wedged between the pressing bar 7 and the belt 1, a length of flexible material can then be brought to unfold on the upper surface of this mat in controlling simultaneously and synchronously a movement gantry and scrolling of the carpet 1.

Il est à noter, en outre, que tous les déplacements du tapis 1 sont numérisés de façon à permettre une interruption de la découpe puis la reprise ultérieure de cette dernière strictement au même endroit, la gestion de la longueur de matière souple utilisée...It should also be noted that all movements of the carpet 1 are digitized so as to allow an interruption of the cutting then the subsequent resumption of the latter strictly in the same place, the management the length of flexible material used ...

Les moyens d'alimentation comprennent enfin des moyens de centrage transversal adaptés pour centrer la bande de matière 4 par rapport au tapis 1. Ces moyens de centrage comprennent en premier lieu des moyens de détection d'un des bords latéraux de la bande de matière souple 4.The supply means finally include transverse centering means adapted to center the strip of material 4 relative to the mat 1. These means of centering include in the first place means of detection of one of the lateral edges of the strip of material flexible 4.

Ces moyens de détection consistent par exemple en des cellules émettrice/réceptrice fixées sur les branches d'un étrier 9 disposé entre le rouleau 5 de matière souple et le tapis 1 sensiblement dans le même plan horizontal que ledit tapis. Cet étrier 9 est, en outre, lui-même fixé sur une barre de guidage 10 sur laquelle est amenée à défiler la bande de matière souple 4.These detection means consist of example in transmitter / receiver cells fixed on the branches of a stirrup 9 disposed between the roller 5 of flexible material and the mat 1 substantially in the same plane horizontal than said mat. This stirrup 9 is, moreover, itself fixed on a guide bar 10 on which is brought to pass the strip of flexible material 4.

Les moyens de cent rage comportent, en outre, des moyens de déplacement transversal du cadre 6 support du rouleau 5 de matière souple, asservis aux moyens de détection précités. Tel que représenté schématiquement à la figure 10, ces moyens de déplacement consistent en une vis sans fin entraínée en rotation au moyen d'un moteur 11 par l'intermédiaire d'un réducteur à engrenage 12, 13.The means of a hundred rage include, in in addition, means for transversely moving the frame 6 support of the roll 5 of flexible material, subject to the means above. As shown schematically at FIG. 10, these displacement means consist of a worm driven in rotation by means of a motor 11 by means of a gear reducer 12, 13.

Le portique 14 de déplacement en translation longitudinale de la tête de coupe est quant à lui entraíné de façon classique par des courroies crantées au moyen d'un moteur à courant continu et de systèmes de réduction, le long de deux rails longitudinaux (non représentés) disposés de part et d'autre du tapis 1.The gantry 14 of displacement in longitudinal translation of the cutting head is about driven him in a classic way by toothed belts by means of a direct current motor and reduction, along two longitudinal rails (not shown) arranged on either side of the carpet 1.

Le chariot 15 est également entraíné le long du portique par un système de courroie crantée au moyen d'un moteur à courant continu et de systèmes de réduction.The carriage 15 is also driven on along the gantry by a notched belt system at the by means of a DC motor and reduction.

Sur ce chariot 15 est fixé le corps 16a d'un vérin pneumatique 16 agencé verticalement et sur l'extrémité de la tige 16b duquel est fixée une plate-forme 17 support de la tête de coupe 18.On this carriage 15 is fixed the body 16a a pneumatic cylinder 16 arranged vertically and on the end of the rod 16b from which is fixed a platform 17 cutting head holder 18.

Cette plate-forme 17 est guidée, lors de l'actionnement du vérin 16, au moyen de deux colonnes de guidage 19, 20 reliant deux platines 21, 22 disposées au-dessus et au-dessous de ladite plate-forme, la platine inférieure 22 étant solidaire du corps 16a de vérin 16.This platform 17 is guided, during actuation of the actuator 16, by means of two columns of guide 19, 20 connecting two plates 21, 22 arranged above and below said platform, the plate lower 22 being secured to the cylinder body 16a 16.

En outre, tel que représenté à la figure 2, des moyens de butée haute et basse sont adaptés pour permettre un réglage manuel de la course du vérin pneumatique 16.Additionally, as shown in Figure 2, upper and lower stop means are adapted for allow manual adjustment of the cylinder stroke pneumatic 16.

Les moyens de butée haute sont constitués d'une vis 23 logée dans un alésage taraudé ménagé dans la platine supérieure 21 à l'aplomb de la tige 16b du vérin.The upper stop means are constituted a screw 23 housed in a threaded bore formed in the upper plate 21 plumb with the rod 16b of the jack.

Les moyens de butée basse sont quant à eux constitués d'une vis 24 logée dans un alésage taraudé ménagé dans la plate-forme 17 et adaptée pour venir buter sur la platine inférieure 23 lors de la rétraction du vérin 16. En vue d'accéder à cette Vis 24 pour le réglage de la position de la butée basse au moyen d'un tournevis, la platine supérieure 21 est dotée d'un orifice 25 à l'aplomb de ladite vis.The low stop means are consisting of a screw 24 housed in a threaded bore formed in the platform 17 and adapted to come up against on the lower plate 23 during the retraction of the jack 16. In order to access this Screw 24 for adjusting the position of the bottom stop using a screwdriver, the upper plate 21 has a hole 25 plumb of said screw.

La plate-forme 17 porte, par ailleurs, les moyens d'entraínement en rotation de la tête de coupe autour d'un axe vertical destinés à orienter la molette dans la direction du déplacement.The platform 17 also carries the means for rotating the cutting head around a vertical axis intended to orient the wheel in the direction of travel.

Ces moyens d'entraínement comprennent, en premier lieu, un moteur 26 sur l'arbre duquel est monté un pignon 27 accouplé par une courroie d'entraínement 28 à une poulie crantée 29 solidaire en translation et libre en rotation par rapport à la plate-forme 17.These training means include, in first, a motor 26 on the shaft of which is mounted a pinion 27 coupled by a drive belt 28 to a toothed pulley 29 integral in translation and free in rotation relative to the platform 17.

Les moyens d'entraínement comprennent, en outre, un arbre vertical 30 solidaire de la poulie crantée 29 et centré sur cette dernière, ledit arbre s'étendant verticalement sous la plate-forme 17 et étant doté au niveau de son extrémité inférieure d'une platine 31 sous laquelle est vissée la tête de coupe 18.The training means include, in in addition, a vertical shaft 30 secured to the toothed pulley 29 and centered on the latter, said shaft extending vertically under platform 17 and being provided with level of its lower end of a plate 31 under which is screwed the cutting head 18.

Il est à noter que cet arbre 30 est creux et loge les tuyaux d'alimentation en air comprimé et les fils électriques nécessaires au fonctionnement de la tête de coupe 18.It should be noted that this shaft 30 is hollow and houses the compressed air supply hoses and electrical wires necessary for the operation of the head cutting 18.

En dernier lieu, la tête de coupe se compose de deux éléments : un élément supérieur fixe 32 solidarisé à la platine 31, et un élément inférieur, ou tiroir 33, mobile par rapport à l'élément fixe 32 selon la direction de déplacement de la tête de coupe 18.Finally, the cutting head is composed of two elements: a fixed upper element 32 secured to the plate 31, and a lower element, or drawer 33, movable relative to the fixed element 32 according to the direction of movement of the cutting head 18.

L'élément fixe 32 est doté d'une réservation à l'intérieur de laquelle est logé un moteur électrique 34 d'entraínement à grande vitesse de la molette de découpe. Ce moteur 34 est disposé horizontalement et son arbre moteur entraíne en rotation une poulie 35.The fixed element 32 has a reservation inside which an engine is housed electric 34 high speed drive wheel cutting. This motor 34 is arranged horizontally and its motor shaft rotates a pulley 35.

Le tiroir mobile 33 est quant à lui doté, en sous-face, d'un décrochement 36 dans lequel est logée la molette 37 agencée pour faire saillie sous ledit tiroir. Cette molette 37 est portée par un arbre horizontal 38 monté rotatif au moyen de roulements tels que 39 à l'intérieur d'un alésage 40 ménagé dans le tiroir 33.The movable drawer 33 is in turn provided, on the underside, a recess 36 in which is housed the wheel 37 arranged to project under said drawer. This wheel 37 is carried by a horizontal shaft 38 rotatably mounted by means of bearings such as 39 to the interior of a bore 40 formed in the drawer 33.

Cet arbre 38 porte, en outre, une poulie 41 accouplée à la poulie 35 du moteur 34 par une courroie 56 constituée d'un joint torique.This shaft 38 also carries a pulley 41 coupled to the pulley 35 of the motor 34 by a belt 56 consisting of an O-ring.

Il est à noter, en outre, que le moteur 34 et l'arbre 38 portant la molette 37 sont disposés de façon que l'axe de rotation de ladite molette soit décalé horizontalement d'une distance D réglable par déplacement du tiroir 33, par rapport à l'axe vertical de symétrie de l'arbre 30 qui constitue l'axe d'asservissement tangentiel de cette molette.It should also be noted that the motor 34 and the shaft 38 carrying the wheel 37 are arranged so that the axis of rotation of said wheel is offset horizontally by a distance D adjustable by displacement of drawer 33, with respect to the vertical axis of symmetry of the shaft 30 which constitutes the tangential servo axis of this wheel.

Par ailleurs, le moteur 34 est adapté pour entraíner en rotation la molette 37 dans le même sens que le sens de déploiement de la tête de coupe 18 et avec une vitesse périphérique linéaire supérieure à celle de ladite tête de coupe. En l'exemple, ce moteur 34 possède un couple sensiblement compris entre 4 et 6 cm.N et est adapté pour entraíner la molette 37 à une vitesse linéaire supérieure à 10 m/s.Furthermore, the motor 34 is suitable for rotate the dial 37 in the same direction as the direction of deployment of the cutting head 18 and with a linear peripheral speed greater than that of said cutting head. In the example, this motor 34 has a torque substantially between 4 and 6 cm.N and is suitable for drive the dial 37 at a linear speed greater than 10 m / s.

Ce moteur est, en outre, équipé d'un variateur de vitesse pouvant consister en un variateur d'intensité ou en un simple transformateur à n positions permettant d'obtenir n vitesses différentes, en vue de régler la vitesse de rotation de la molette 37 en fonction des paramètres de la découpe (type de matière à découper, épaisseur, nombre de feuilles...). Il est à noter que cette vitesse peut également être modifiée en changeant le rapport des poulies 35, 41.This engine is also equipped with a variable speed drive which can consist of a variator intensity or as a simple transformer with n positions making it possible to obtain n different speeds, with a view to adjust the speed of rotation of the dial 37 according cutting parameters (type of material to be cut, thickness, number of sheets ...). It should be noted that this speed can also be changed by changing the ratio of the pulleys 35, 41.

Tel que représenté aux figures 3 et 4, la molette 37 présente quant à elle une forme octogonale composée de quatre côtés présentant la forme d'arcs de cercle reliés deux à deux par des côtés linéaires.As shown in Figures 3 and 4, the wheel 37 has an octagonal shape composed of four sides having the shape of arcs of circle connected two by two by linear sides.

Une telle molette 37 présente l'avantage de ne pas s'encrasser et de fournir de meilleurs résultats de coupe, notamment avec des matériaux relativement durs tels que du vinyl ou des matériaux synthétiques d'une certaine épaisseur.Such a wheel 37 has the advantage of don't clog up and provide better results from cutting, especially with relatively hard materials such as than vinyl or synthetic materials of a certain thickness.

Le tiroir mobile 33 porte, en outre, des moyens d'affûtage de la molette 37 comportant deux meules 42, 43 montées chacune sur l'extrémité d'axes 44, 45 logés dans des trous borgnes 46, 47 ménagés de part et d'autre de la molette 37.The movable drawer 33 also carries means for sharpening the wheel 37 comprising two grinding wheels 42, 43 each mounted on the end of housed axes 44, 45 in blind holes 46, 47 formed on either side of the wheel 37.

Une de ces meules 42 est destinée à conférer à la molette son angle de coupe, tandis que l'autre 43 est destinée à assurer la fonction de coupe-fil. A cet effet, les trous borgnes 46, 47 sont ménagés de façon que les faces d'aiguisage de ces meules 42, 43 forment un angle d'inclinaison différent par rapport à la face correspondante de la molette 37.One of these grinding wheels 42 is intended for give the wheel its cutting angle, while the other 43 is intended to perform the thread cutter function. For this purpose, the blind holes 46, 47 are provided so that the sharpening faces of these grinding wheels 42, 43 form a angle of inclination different from the face wheel 37.

Ainsi, ces trous borgnes 46, 47 sont ménagés de façon que la face d'aiguisage de la meule d'aiguisage 42 délimite un angle sensiblement égal à 20 degrés avec la face correspondante de la molette 37, et que la face d'aiguisage de la meule coupe-fil 43 délimite un angle sensiblement égal à 5 degrés avec l'autre face de la molette.Thus, these blind holes 46, 47 are arranged so that the sharpening face of the grinding wheel sharpening 42 defines an angle substantially equal to 20 degrees with the corresponding face of the dial 37, and that the sharpening face of the thread cutting wheel 43 delimits a angle substantially equal to 5 degrees with the other face of the scroll wheel.

En outre, ces trous borgnes 46, 47 sont ménagés de façon que le contact des faces d'aiguisage des meules 42, 43 soit décentré de telle sorte qu'au contact, la rotation de la molette 37 entraíne celle desdites meules.In addition, these blind holes 46, 47 are arranged so that the contact of the sharpening faces of the grinding wheels 42, 43 is off-center so that on contact, the rotation of the wheel 37 causes that of said grindstones.

Enfin, les moyens de déplacement de ces meules 42, 43 destinés à venir les appliquer contre la molette sont du type pneumatique et comprennent des canalisations telles que 48, 49 d'amenée d'air comprimé débouchant au niveau du fond des trous borgnes 46, 47. La perte de charge dans ces canalisations 48, 49 est, en outre, adaptée pour que la pression d'air comprimé entraínant le déplacement de la meule coupe-fil 43 soit inférieure à celle entraínant le deplacement de la meule d'aiguisage 42.Finally, the means of movement of these grinding wheels 42, 43 intended to apply them against the wheels are pneumatic and include pipes such as 48, 49 for compressed air supply opening at the bottom of the blind holes 46, 47. The pressure drop in these pipes 48, 49 is, in additionally, adapted so that the compressed air pressure causing the displacement of the thread cutting wheel 43 either lower than that causing the displacement of the grinding wheel sharpening 42.

En dernier lieu, et en vue de conférer sa mobilité au tiroir 33 par rapport à l'élément fixe 32, la liaison entre ces deux éléments est réalisée au moyen d'une pièce intermédiaire 50 fixée sous l'élément fixe 32.Finally, and in order to confer its mobility to the drawer 33 relative to the fixed element 32, the connection between these two elements is achieved by means of a intermediate piece 50 fixed under the fixed element 32.

Cette pièce intermédiaire 50 présente une ouverture centrale 51 tandis que le tiroir présente un tenon 52 de longueur inférieure à celle de l'ouverture 51, logé dans cette dernière, le maintien dudit tiroir étant assuré par une plaque 53 reposant sur la pièce intermédiaire 50 et fixée au tenon 52. Les déplacements proprement dits sont assurés manuellement au moyen d'une vis 54 coopérant avec un alésage taraudé ménagé horizontalement dans le tenon 52 de façon que le vissage ou le dévissage de ladite vis entraíne un coulissement dudit tenon à l'intérieur de l'ouverture 51. De plus, des ressorts tels que 55 sont disposés de façon à assurer un déplacement effectif du tenon 52 lors du dévissage de la vis 54.This intermediate piece 50 has a central opening 51 while the drawer has a tenon 52 of length less than that of the opening 51, housed in the latter, maintaining said drawer being provided by a plate 53 resting on the part intermediate 50 and fixed to stud 52. Displacements themselves are insured manually by means of a screw 54 cooperating with a tapped bore horizontally in the tenon 52 so that the screwing or unscrewing said screw causes said sliding tenon inside opening 51. In addition, springs such as 55 are arranged to provide a effective movement of the pin 52 when unscrewing the screw 54.

Cette vis 54 est utilisée, une fois le réglage de la butée basse effectué en fonction de l'épaisseur de la matière à découper, de façon que le point de contact avant de la molette 37 soit situé au voisinage de l'axe d'asservissement tangentiel et légèrement décalé vers l'avant par rapport à cet axe.This screw 54 is used, once the adjustment of the bottom stop made according to the thickness of the material to be cut, so that the point contact switch of the thumbwheel 37 is located in the vicinity of the tangential and slightly offset servo axis forward with respect to this axis.

Cette possibilité de réglage permet en combinaison avec les autres caractéristiques de la machine de découpe selon l'invention (vitesse de rotation très élevée de la molette 37, qualité de l'affûtage de cette molette...) d'obtenir un effort de coupe extrêmement atténué, et par là-même de parvenir au résultat recherché, à savoir s'affranchir de tout maintien de la matière à découper.This possibility of adjustment allows combination with other machine features cutting according to the invention (very rotational speed high of wheel 37, quality of sharpening of this wheel ...) to obtain an extremely cutting force mitigated, and thereby achieve the desired result, namely to get rid of any maintenance of the material to cut.

Claims (20)

  1. A cutting machine for cutting a flexible material (4) in particular in the form of a single ply or of a small lay-up of plies, the cutting machine including:
    a table-top provided with a support surface (1) for supporting the flexible material (4) to be cut;
    a cutting head (18) provided with a cutting wheel (37), a drive motor (34) for rotating said cutting wheel, and sharpening means (42, 43) for sequentially sharpening said cutting wheel;
    horizontal drive means (14, 15) for horizontally displacing the cutting head (18) above the table-top along two orthogonal displacement axes; and
    rotary drive means (26-30) for rotating the cutting head (18) about a vertical "tangential servo-control" axis;
    said cutting machine being characterized in that:
    the table-top is covered with a support material of predetermined thickness into which the cutting wheel (37) can penetrate easily;
    the cutting head (18) is associated with a carriage (15) to which it is connected via vertical displacement means (16) capable of displacing said head between a top position in which the cutting wheel (37) is at a distance above the table-top, and a bottom position in which said cutting wheel penetrates to a predetermined depth into the support material;
    vertical adjustment means (24) are adapted so as to make it possible to adjust the bottom position of the cutting head (18), and therefore the depth to which the cutting wheel penetrates into the support material;
    the drive motor (34) for rotating the cutting wheel (37) is carried by the cutting head (18) and is capable of rotating said cutting wheel at a speed greater than 5,000 r.p.m., said motor and said cutting wheel being respectively provided with a drive shaft and an axis of rotation that are parallel and horizontal;
    the rotary drive means (26-30) for rotating the cutting head (18) are organized so that the tangential servo-control axis of the cutting wheel (37) is offset horizontally at a distance (D) relative to the axis of rotation thereof, so that said cutting wheel penetrates into the support material at a front contact point situated in the vicinity of said tangential servo-control axis; and
    horizontal adjustment means (54) are adapted so as to make it possible to adjust the distance (D) between the tangential servo-control axis and the axis of rotation of the cutting wheel (37).
  2. The cutting machine according to claim 1, characterized in that the drive motor (34) for rotating the cutting wheel (37) is adapted so as to rotate it in the same direction as the displacement direction of the cutting head (18), and with a linear peripheral velocity greater than that of said cutting head.
  3. The cutting machine according to claim 2, characterized in that the drive motor (34) for rotating the cutting wheel (37) generates torque lying substantially in the range 4 cm.N to 6 cm.N, and it is adapted so as to drive said cutting wheel at a linear velocity greater than 10 meters per second (m/s).
  4. The cutting machine according to one of the preceding claims, characterized in that the sharpening means comprise:
    two whetting members (42, 43), each of which is provided with a respective whetting face, and is disposed facing a respective face of the cutting wheel (37), one of said whetting members (42) being adapted so as to give the cutting wheel (37) its cutting angle, and the other whetting member (43) being adapted so as to perform an edge-cutting function; and
    means (48, 49) for displacing the whetting members (42, 43) so as to press their whetting faces periodically and for a predetermined time against the corresponding faces of the cutting wheel (37).
  5. The cutting machine according to claim 4, characterized in that the whetting members (42, 43) are disposed such that their whetting faces form different respective angles of inclination with the corresponding faces of the cutting wheel (37), and such that the contact area between the sharpening whetting member (42) and the cutting wheel (37) is smaller than the contact area between the other whetting member (43) and said cutting wheel.
  6. The cutting machine according to claim 5, characterized in that the whetting face of the sharpening whetting member (42) defines an angle that is substantially equal to 20 degrees with the corresponding face of the cutting wheel (37), and the whetting face of the other whetting member (43) defines an angle that is substantially equal to 5 degrees with the other face of said cutting wheel.
  7. The cutting machine according to one of claims 4 to 6, characterized in that the contact zone between the whetting face of each whetting member (42, 43) and the corresponding face of the cutting wheel (37) is eccentric relative to the center of said whetting face, so that, on contact, the rotation of said cutting wheel rotates said whetting members.
  8. The cutting machine according to one of claims 4 to 7, characterized in that:
    each whetting member is constituted by a grinding wheel (42, 43) mounted in the vicinity of one of the ends of a pin (44, 45) received in a blind hole (46, 47) provided in the cutting head (18) facing a respective one of the faces of the cutting wheel (37); and
    the means for displacing said whetting members are of the pneumatic type, and they comprise duct means (48, 49) opening out into each blind hole (46, 47) and adapted so as to push the whetting member (42, 43) out from said hole.
  9. The cutting machine according to claim 8, characterized in that the pneumatic displacement means are adapted so that the compressed-air pressure they deliver to the edge-cutting whetting member (43) is lower than the compressed-air pressure they deliver to the sharpening whetting member (42).
  10. The cutting machine according to one of the preceding claims, characterized in that the cutting head (18) comprises:
    a "fixed" element (32) carried by the carriage (15) via vertical displacement means (16), and to which the drive motor (34) for rotating the cutting wheel (37) is secured;
    a "moving" element (33), referred to as a "slide", carrying the cutting wheel (37); and
    manual means (54) for displacing the slide (33) relative to the fixed element (32), which means are adapted so as to adjust the distance (D).
  11. The cutting machine according to claim 10, characterized in that:
    the cutting wheel (37) is carried by a horizontal shaft (38) on which a pulley (41) is mounted, the shaft extending along an axis that is orthogonal to the displacement axis of the slide (33);
    the drive motor (34) for rotating the cutting wheel (37) includes a drive shaft carrying a pulley (35), the drive shaft being parallel to the shaft of the cutting wheel (37); and
    a drive belt (56) constituted by an O-ring is mounted around said pulleys.
  12. The cutting machine according to one of claims 10 or 11, characterized in that the drive motor (34) for rotating the cutting wheel (37) includes a variable-speed controller.
  13. The cutting machine according to one of the preceding claims, characterized in that the cutting wheel (37) is in the form of an octagon composed of four circular-arc shaped sides interconnected in pairs by linear sides.
  14. The cutting machine according to one of the preceding claims, characterized in that:
    the table-top is constituted by an endless belt (1) having a supporting top surface and mounted around two rollers (2, 3);
    the support material is secured to the belt over the entire surface thereof; and
    drive means are adapted so as to cause a given length of belt (1) to be advanced on command.
  15. The cutting machine according to claim 14, in which the horizontal drive means for displacing the cutting head (18) horizontally comprise:
    a gantry (14) disposed transversely above the belt (1), and associated with drive means adapted so as to displace it longitudinally above said belt; and
    a carriage (15) carried by the gantry (14) and associated with drive means adapted so as to displace it longitudinally along said gantry.
  16. The cutting machine according to claim 15, characterized in that:
    a clamping bar (7) is associated with the gantry (14) and is provided with vertical displacement means (8) capable of pressing it against the belt (1); and
    the drive means for displacing the gantry (14) and the drive means for displacing the belt (1) are adapted so as to displace said belt and said gantry in synchronized manner.
  17. The cutting machine according to one of claims 14 to 16, characterized in that it includes:
    support means (6) for supporting a roller (5) for supplying a sheet of flexible material (4), which means are adapted so as to make it possible to deliver said sheet to the belt (1);
    detection means (9) for detecting a side edge of the sheet of flexible material (4) supplied to the belt (1); and
    transverse displacement means (11-13) for transversely displacing the support means (6) for supporting the supply roller (5), which means are adapted so as to position said roller as a function of the information delivered by the detection means.
  18. The cutting machine according to one of claims 14 to 17, characterized in that it includes a numerical control unit adapted so as in particular to digitize the displacements of the belt (1).
  19. The cutting machine according to one of the preceding claims, characterized in that the support material is constituted by a layer of foam made of an expanded material, such as polyurethane foam.
  20. A method of adjusting the position of the cutting wheel (37) of a cutting machine according to one of claims 1 to 19, said method being characterized in that it consists in:
    determining a penetration depth given by adjusting the means (24) for adjusting the bottom position of the cutting head (18);
    bringing the cutting wheel (37) into bottom abutment, while it is rotating, so as to obtain a first line of impact;
    raising the cutting wheel (37) again and causing the cutting head (18) to be rotated through 90 degrees;
    lowering the cutting wheel (37) again into bottom abutment, while it is rotating, so as to obtain a second line of impact that is orthogonal to the first line of impact;
    examining the lines of impact so as to determine the lengths of the lines extending beyond their point of intersection; and
    actuating the horizontal adjustment means (54) in one direction or the other so as to obtain an impact line length beyond the point of intersection of the impact lines lying substantially in the range 0.5 mm to 2 mm.
EP19930914826 1993-07-07 1993-07-07 Cutting machine using a rotary wheel for cutting a flexible material consisting of a single sheet or a small mat of sheets, and method for adjusting said machine Expired - Lifetime EP0707527B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1993/000702 WO1995001855A1 (en) 1992-01-08 1993-07-07 Cutting machine using a rotary wheel for cutting a flexible material consisting of a single sheet or a small mat of sheets, and method for adjusting said machine

Publications (2)

Publication Number Publication Date
EP0707527A1 EP0707527A1 (en) 1996-04-24
EP0707527B1 true EP0707527B1 (en) 1998-01-28

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US (1) US6019023A (en)
EP (1) EP0707527B1 (en)
DE (1) DE69316776T2 (en)
ES (1) ES2116456T3 (en)
FR (1) FR2685884B1 (en)
WO (1) WO1995001855A1 (en)

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FR2685884B1 (en) * 1992-01-08 1994-05-13 Digital Control MACHINE FOR CUTTING A FLEXIBLE MATERIAL IN THE FORM OF A SINGLE SHEET OR A SMALL SHEET MATTRESS, AND METHOD FOR ADJUSTING SUCH A MACHINE.
US6734582B2 (en) * 2001-04-10 2004-05-11 International Business Machines Corporation Linear actuator using a rotating motor
US7702004B2 (en) 2002-12-09 2010-04-20 Alexander Roger Deas Simultaneous bidirectional differential signalling interface
ITBO20050447A1 (en) * 2005-07-01 2007-01-02 L C R S N C Di Lorenzoni Remo CARDBOARD PROCESSING MACHINE
US7975582B1 (en) 2008-10-13 2011-07-12 Norman Coon Strip cutting device and methods of use
JP5171863B2 (en) * 2010-03-09 2013-03-27 日東電工株式会社 LAMINATED FILM CUTTING METHOD, CUTTING DEVICE, AND OPTICAL DISPLAY DEVICE MANUFACTURING METHOD
CN103482154B (en) * 2013-09-29 2015-05-13 普天物流技术有限公司 Floating type cutting head for box unpacking machine
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Also Published As

Publication number Publication date
FR2685884A1 (en) 1993-07-09
FR2685884B1 (en) 1994-05-13
US6019023A (en) 2000-02-01
DE69316776D1 (en) 1998-03-05
ES2116456T3 (en) 1998-07-16
DE69316776T2 (en) 1999-07-01
WO1995001855A1 (en) 1995-01-19
EP0707527A1 (en) 1996-04-24

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