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FR2706797A1 - Optical press-cutter for cutting sheets using a laser - Google Patents

Optical press-cutter for cutting sheets using a laser Download PDF

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Publication number
FR2706797A1
FR2706797A1 FR9307520A FR9307520A FR2706797A1 FR 2706797 A1 FR2706797 A1 FR 2706797A1 FR 9307520 A FR9307520 A FR 9307520A FR 9307520 A FR9307520 A FR 9307520A FR 2706797 A1 FR2706797 A1 FR 2706797A1
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FR
France
Prior art keywords
rotor
cutting
slide
lens
fixed
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
FR9307520A
Other languages
French (fr)
Other versions
FR2706797B1 (en
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.)
ALPHATECH IND
Original Assignee
ALPHATECH IND
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ALPHATECH IND filed Critical ALPHATECH IND
Priority to FR9307520A priority Critical patent/FR2706797A1/en
Publication of FR2706797A1 publication Critical patent/FR2706797A1/en
Application granted granted Critical
Publication of FR2706797B1 publication Critical patent/FR2706797B1/fr
Granted legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/08—Fastening or securing by means not forming part of the material of the label itself
    • G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The subject of the invention, FIGURE 2, is a device making it possible to cut a web into sheets using a laser beam, characterised in that it comprises: - a fixed support frame (1) which supports the rotor (3); - ball bearings (2); - a rotor (3); - a motorisation unit (8), (9), (10); - an electronic control device (11); - a mirror (19) fixed to the rotor (3); - a lens (7) mounted on a slide (18), the movement of which is coupled to the angular position of the rotor (3) during its rotation; - an inlet (5) for cutting assistance gas; - a focusing nozzle (4) for centring the cutting assistance gas on the axis; - a light trap (6); - a convex presser roller (14); - a concave presser roller (15).

Description

La présente invention concerne un dispositif permettant de découper à la volée des bandes, par exemple dans un ruban se déroulant perpendiculairement à la direction de découpe, comme le montre la FIGURE 1. The present invention relates to a device making it possible to cut strips on the fly, for example from a ribbon unwinding perpendicular to the cutting direction, as shown in FIGURE 1.

Dans l'industrie différents moyens existes pour réaliser cette opération, mais dans un certain nombre de cas, ces moyens en question ne peuvent s'appliquer. In the industry different means exist to carry out this operation, but in a certain number of cases, these means in question cannot be applied.

A titre d'exemple d'une façon générale, la fabrication des carnets de timbres pour affranchir le courrier fait appel, en fin d'élaboration, à une procédure de découpe transversale. Jusqu'à présent, la découpe était réalisée par des lames coupantes animées d'un mouvement de rotation, la colle n'étant pas mouillée était passive et donc non adhérente. By way of example, in general, the manufacture of stamp booklets for franking mail uses, at the end of preparation, a transverse cutting procedure. Until now, the cutting was carried out by cutting blades animated by a rotational movement, the glue not being wet was passive and therefore non-adherent.

Avec l'apparition des timbres autocollants, la colle ayant la propriété d'être naturellement active, donc adhérente, les moyens classiques de découpe par contact posent beaucoup de problèmes. With the appearance of self-adhesive stamps, the glue having the property of being naturally active, therefore adherent, the conventional means of contact cutting pose many problems.

Pour réaliser ce travail, dans la Communauté Industrielle l'idée a été émise d'utiliser un faisceau laser pour couper les carnets de timbres, sachant que depuis très longtemps la découpe du papier eut du carton a été démontrée. To carry out this work, in the Industrial Community the idea was emitted to use a laser beam to cut the stamp booklets, knowing that for a very long time the cutting of paper or cardboard has been demonstrated.

Les contraintes technico-économiques imposent de découper à grande vitesse. Pour ce faire, il faut que le ruban soit animé d'un mouvement continu ainsi que le point de focalisation du faisceau laser. La longueur de découpe est généralement importante, ce qui la rend incompatible avec la profondeur de champ optique offerte par un objectif ou un miroir de focalisation. Technical and economic constraints make it necessary to cut at high speed. To do this, the ribbon must be animated in a continuous movement as well as the focal point of the laser beam. The cutting length is generally large, which makes it incompatible with the depth of optical field offered by a lens or a focusing mirror.

L'invention a pour objet FIGURES 2, 3 et 4, un dispositif optomécanique et son électronique de commande (11) caractérisé en ce qu'il est constitué:
- d'un bâti principal (1) supportant un rotor (3) par l'intermédiaire de trois paliers à billes (2). Le rotor (3) est mis en rotation par un moteur (8) auquel est associé un codeur de position (9) et une armoire électronique de commande (11) La liaison entre le moteur (8) et le rotor (3) est assurée par un accouplement (10).The subject of the invention is FIGURES 2, 3 and 4, an optomechanical device and its control electronics (11) characterized in that it consists of:
- a main frame (1) supporting a rotor (3) by means of three ball bearings (2). The rotor (3) is rotated by a motor (8) with which is associated a position encoder (9) and an electronic control cabinet (11) The connection between the motor (8) and the rotor (3) is ensured by a coupling (10).

- d'un miroir (19) pour couder le faisceau, miroir qui se trouve fixé au rotor (3). - a mirror (19) for bending the beam, a mirror which is fixed to the rotor (3).

En fonction de la puissance du faisceau laser, ce miroir (19) peut être refroidi.Depending on the power of the laser beam, this mirror (19) can be cooled.

- d'un orifice d'arrivée de gaz (5) fixe dans l'espace,
- d'une glissière (18) fixée au bâti (1). La partie mobile de la glissière (18) supporte une lentille de focalisation (7),
- d'un piège à lumière (6) qui peut être éventuellement refroidi selon la puissance du faisceau laser (12),
- d'un rouleau inférieur concave (15) et d'un rouleau supérieur convexe (14). - a gas inlet orifice (5) fixed in space,
- a slide (18) fixed to the frame (1). The movable part of the slide (18) supports a focusing lens (7),
- a light trap (6) which can be optionally cooled depending on the power of the laser beam (12),
- a concave lower roller (15) and a convex upper roller (14).

PRINCIPE
Un faisceau laser (12) arrive sur la lentille (7) qui le focalise en (13) à l'extrémité de la buse (4), buse qui est solidaire du rotor (3).PRINCIPLE
A laser beam (12) arrives on the lens (7) which focuses it at (13) at the end of the nozzle (4), which nozzle is integral with the rotor (3).

Lorsque le rotor (3) est animé par une vitesse établie FIGURES 2 et 4, dans le voisinage du ruban à découper (16), le point de focalisation d'écrit un arc de cercle.When the rotor (3) is driven by a speed established FIGURES 2 and 4, in the vicinity of the cutting ribbon (16), the focal point writes an arc.

Les rouleaux presseurs (14) et (15) imposent temporairement au ruban (16) le même rayon de courbure que celui qui est décrit par le point de focalisation (13). Une fois découpées, les bandes se redressent par élasticité.The pressure rollers (14) and (15) temporarily impose on the ribbon (16) the same radius of curvature as that described by the focusing point (13). Once cut, the bands straighten out by elasticity.

Pour compenser le fait que le ruban (16) se déplace au cours de la découpe, I'axe de rotation (17) du rotor (3) FIGURES 2 et 5, -est orienté avec un angle a par rapport à l'axe de défilement du ruban. Cet angle convenablement choisi permet de découper les bandes perpendiculairement à l'axe du ruban (16).To compensate for the fact that the ribbon (16) moves during cutting, the axis of rotation (17) of the rotor (3) FIGURES 2 and 5, is oriented at an angle a with respect to the axis of scroll the ribbon. This suitably chosen angle makes it possible to cut the strips perpendicular to the axis of the ribbon (16).

Au cours de la découpe, la partie mobile de la glissière (18) qui supporte la lentille (7) monte et descend légèrement, ce mouvement étant commandé par la position angulaire du rotor (3).During cutting, the movable part of the slide (18) which supports the lens (7) rises and falls slightly, this movement being controlled by the angular position of the rotor (3).

Si la lentille était fixe, la forme de la bande serait celle qui est représentée à la
FIGURE 6, forme due à la découpe d'une surface courbe avec une orientation a de l'axe du rotor (3) par rapport à l'axe du ruban (16).If the lens were fixed, the shape of the strip would be that shown in the
FIGURE 6, shape due to the cutting of a curved surface with an orientation a of the axis of the rotor (3) relative to the axis of the ribbon (16).

En couplant le léger déplacement de la lentille (7) à la position du rotor (3), la forme découpée est rectangulaire comme le montre la FIGURE 7.By coupling the slight movement of the lens (7) to the position of the rotor (3), the cut shape is rectangular as shown in FIGURE 7.

Selon une première variante de l'invention, la glissière (18) est remplacée par un excentrique.According to a first variant of the invention, the slide (18) is replaced by an eccentric.

Selon une deuxième variante de l'invention, la lentille (7) est remplacée par un miroir de focalisation.According to a second variant of the invention, the lens (7) is replaced by a focusing mirror.

Selon une troisième variante de l'invention, la partie fixe de la glissière (18) est solidaire du rotor (3). According to a third variant of the invention, the fixed part of the slide (18) is integral with the rotor (3).

Claims (4)

REVENDICATIONS 1) Dispositif permettant de découper un ruban en bandes à partir d'un faisceau laser caractérisé en ce qu'il comprend: 1) Device for cutting a ribbon into strips from a laser beam, characterized in that it comprises: - un bâti fixe (1) qui supporte le rotor (3), - a fixed frame (1) which supports the rotor (3), - des paliers à billes (2), - ball bearings (2), - un rotor (3), - a rotor (3), - une motorisation (8), (9), (10), - a motorization (8), (9), (10), - une électronique de commande (11), - control electronics (11), - un miroir (19) fixé au rotor (3), - a mirror (19) fixed to the rotor (3), - une lentille (7) montée sur une glissière (18) dont le mouvement est couplé à la position angulaire du rotor (3) au cours de sa rotation, - a lens (7) mounted on a slide (18) whose movement is coupled to the angular position of the rotor (3) during its rotation, - une arrivée de gaz d'assistance de découpe (5), - a cutting assistance gas inlet (5), - une buse de focalisation (4) pour axer le gaz d'assistance de découpe, - a focusing nozzle (4) for focusing the cutting assistance gas, - un piège à lumière (6), - a light trap (6), - un galet presseur convexe (14), - a convex pressure roller (14), - un galet presseur concave (15). - a concave pressure roller (15). 2) Dispositif suivant la revendication 1 caractérisé en ce que la partie fixe de la glissière (18) n'est pas solidaire du bâti (1), mais solidaire du rotor (3). 2) Device according to claim 1 characterized in that the fixed part of the slide (18) is not integral with the frame (1), but integral with the rotor (3). 3) Dispositif suivant l'une quelconque des revendications précédentes caractérisé en ce que la glissière (18) est remplacée par un excentrique. 3) Device according to any one of the preceding claims, characterized in that the slide (18) is replaced by an eccentric. 4) Dispositif suivant l'une quelconque des revendications précédentes caractérisé en ce que la lentille (7) est remplacée par un miroir de focalisation.  4) Device according to any one of the preceding claims, characterized in that the lens (7) is replaced by a focusing mirror.
FR9307520A 1993-06-22 1993-06-22 Optical press-cutter for cutting sheets using a laser Granted FR2706797A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9307520A FR2706797A1 (en) 1993-06-22 1993-06-22 Optical press-cutter for cutting sheets using a laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9307520A FR2706797A1 (en) 1993-06-22 1993-06-22 Optical press-cutter for cutting sheets using a laser

Publications (2)

Publication Number Publication Date
FR2706797A1 true FR2706797A1 (en) 1994-12-30
FR2706797B1 FR2706797B1 (en) 1995-09-15

Family

ID=9448388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9307520A Granted FR2706797A1 (en) 1993-06-22 1993-06-22 Optical press-cutter for cutting sheets using a laser

Country Status (1)

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FR (1) FR2706797A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882541A2 (en) * 1997-06-05 1998-12-09 Appleton Papers Inc. Cross direction web processor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088865A (en) * 1976-01-02 1978-05-09 United Technologies Corporation Laser beam welding apparatus
EP0369883A1 (en) * 1988-11-17 1990-05-23 Carnaudmetalbox Device for cleaning both edges of a metallic sheet prior to welding
EP0574324A1 (en) * 1992-06-12 1993-12-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device to produce an helicoidal metal wave guide for laser beam

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088865A (en) * 1976-01-02 1978-05-09 United Technologies Corporation Laser beam welding apparatus
EP0369883A1 (en) * 1988-11-17 1990-05-23 Carnaudmetalbox Device for cleaning both edges of a metallic sheet prior to welding
EP0574324A1 (en) * 1992-06-12 1993-12-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device to produce an helicoidal metal wave guide for laser beam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882541A2 (en) * 1997-06-05 1998-12-09 Appleton Papers Inc. Cross direction web processor
EP0882541A3 (en) * 1997-06-05 2000-02-09 Appleton Papers Inc. Cross direction web processor

Also Published As

Publication number Publication date
FR2706797B1 (en) 1995-09-15

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