WO1999042242A1 - Treatment of slate by means of a laser - Google Patents

Treatment of slate by means of a laser Download PDF

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Publication number
WO1999042242A1
WO1999042242A1 PCT/ES1999/000042 ES9900042W WO9942242A1 WO 1999042242 A1 WO1999042242 A1 WO 1999042242A1 ES 9900042 W ES9900042 W ES 9900042W WO 9942242 A1 WO9942242 A1 WO 9942242A1
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WO
WIPO (PCT)
Prior art keywords
slate
laser
piece
type
shape
Prior art date
Application number
PCT/ES1999/000042
Other languages
Spanish (es)
French (fr)
Inventor
Juan María POU SARACHO
Fernando LUSQUIÑOS RODRIGUEZ
Mohamed Boutinguiza Sidahmed-Larosi
Ramón Francisco SOTO COSTAS
Mariano Jesús PEREZ-MARTINEZ Y PEREZ-AMOR
Original Assignee
Universidad De Vigo
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 Universidad De Vigo filed Critical Universidad De Vigo
Priority to AU29350/99A priority Critical patent/AU2935099A/en
Publication of WO1999042242A1 publication Critical patent/WO1999042242A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/32—Methods and apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist
    • 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
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B28D1/221—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising by thermic methods
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the present invention relates to the treatment of slate by means of the application of laser radiation, such that natural slate plates can be cut, perforated, marked or superficially modified.
  • This invention provides a method for cutting, drilling, marking or modifying the surface of slate plates such as those commonly used for roofs or pavements.
  • Slates are rocks, usually of fine grain, whose main property is the possession of highly developed foliage planes. This allows, through manual processes of cleft or spoliation in favor of these planes, smooth face plates can be obtained with the possibility of varying their thickness.
  • this patent has the advantage of being able to drill a wide variety of diameters, from a few tens of micrometers. practically impossible thing by mechanical methods.
  • Another of the advantages presented by the invention object of the present patent is the fact that the processing is carried out without contact with the part, so that, in no case is it subjected to mechanical solicitations during the laser treatment process, which It is inherent in mechanical processes. In addition, as no contact is established between the part and the tool, it does not suffer wear or corrosion, so it is not necessary to sharpen or replace it.
  • the method of processing slate by laser object of the present patent is to subject the slate piece to the action of laser radiation.
  • the treatment with the laser beam will preferably be carried out once the board has been spilled to the desired thickness.
  • the processing of slate by laser object of the invention is carried out in a suitable system of which an example is shown in Figure 1.
  • This method basically consists of the following: the slate piece (8) to be treated, it is placed on a support appropriate to its dimensions in a mobile system (9).
  • This system will be connected to a system of automatic control of the position of the piece, which, being commonly used in industrial equipment, is not shown in the figure.
  • the laser beam (1) is conducted by means of a refrigerated mirror (2) and a protective tube (3) towards the slate piece (8).
  • the laser beam (1) is focused by means of a lens (5).
  • This lens (5) will be made in such a way and in a material that allows the transmission of the energy of the laser beam (1). Once focused, the laser beam (1) is led to the workpiece (8) through a nozzle (7).
  • a protective window (6) is used. Waste from the laser treatment is collected by a suitable collector (10). When the treatment requires the contribution of some gas, it is introduced through the entry of gases (4).
  • SUBSTITUTE SHEET (RULE 26)
  • perforation there is no relative movement between the laser beam and the slate piece.
  • the cutting of slate plates is done by moving the plate well in front of the laser beam or the laser beam in relation to the slate plate. It is necessary to use a gas that removes molten material so that it does not resolve by closing the area treated by the laser beam again.
  • slate plates of any thickness are marked by means of an Nd: YAG laser ( ⁇ • **** - 1,064 nm) working in pulsed mode at a frequency of 30Hz, with a width of 0.5 ms pulse, with nitrogen gas at a pressure of 4x10 * 5 Pa and with a power of 70 W. Under these conditions, slate pieces were marked at a speed of 30 mm / s.
  • the described method supposes a considerable improvement in the working conditions of the operator who must process the slate plates, eliminating, to a large extent, the acoustic and environmental contaminants that are suffered during the processing of the slate plates by traditional methods.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Pieces or plates of slate can be cut, drilled, marked or treated superficially by means of a method based on laser beam irradiation. The great flexibility of this method enables to implement various types of processes on the same piece of slate without having to change the equipment or tool, but only by modifying the processing parameters. This method improves considerably the working conditions of the operator who has to treat the slate plates such as for example the fabrication of slates for roofs or pavements.

Description

DESCRIPCIÓNDESCRIPTION
PROCESAMIENTO DE PIZARRA MEDIANTE LÁSER.SLATE PROCESSING BY LASER.
La presente invención se refiere al tratamiento de pizarra por medio de la aplicación de la radiación láser, de tal forma que se pueden cortar, perforar, marcar o modificar superficialmente placas de pizarra natural.The present invention relates to the treatment of slate by means of the application of laser radiation, such that natural slate plates can be cut, perforated, marked or superficially modified.
Esta invención proporciona un método para cortar, perforar, marcar o modificar la superficie de placas de pizarra como las que se utilizan habitualmente para cubiertas o pavimentos. Las pizarras son rocas, por lo general, de grano fino, cuya principal propiedad es la posesión de unos planos de foliación muy desarrollados. Esto permite que, mediante procesos manuales de hienda o esfoliación a favor de esos planos, se puedan obtener placas de caras lisas con la posibilidad de variar su espesor.This invention provides a method for cutting, drilling, marking or modifying the surface of slate plates such as those commonly used for roofs or pavements. Slates are rocks, usually of fine grain, whose main property is the possession of highly developed foliage planes. This allows, through manual processes of cleft or spoliation in favor of these planes, smooth face plates can be obtained with the possibility of varying their thickness.
Está compuesta mayoritariamente por materiales arcillosos y mica laminar, lo que le confiere una estructura esquistosa lisa y una esfoliación en láminas finas, esto hace de la pizarra arcillosa y filita un material muy adecuado para obtener los elementos de cubrición o pizarras de techar.It is composed mostly of clay materials and laminar mica, which gives it a smooth schistose structure and a thin sheet sphincter, this makes the clay board and filitates a very suitable material to obtain the roofing elements or roofing boards.
Las principales tareas que deben realizarse para llegar a obtener las placas de pizarra para uso en cubiertas son los siguientes: extracción de grandes bloques en la cantera denominados "rachones"; labrado de los rachones; aserrado de los mismos; esfoliado de las placas y recorte a los tamaños y formas comerciales.The main tasks that must be carried out to obtain slate plates for use on roofs are the following: extraction of large blocks in the quarry called "rachones"; styling of the rachones; sawing them; Splattered plates and trim to commercial sizes and shapes.
Tradicionalmente, la elaboración de estas placas de pizarra viene realizándose de modo manual, siendo un trabajo muy ruidoso realizado en una atmósfera repleta de polvo y muy penoso para el trabajador. Se hace, por tanto, necesaria la introducción de nuevos métodos o técnicas que permitan automatizar los procesos y reducir o eliminar completamente la emisión de polvo y la producción de ruido de forma que se favorezcan las condiciones de trabajo.Traditionally, the elaboration of these slate plates has been carried out manually, being a very noisy work carried out in an atmosphere full of dust and very painful for the worker. It is therefore necessary to introduce new methods or techniques to automate processes and reduce or completely eliminate dust emission and noise production in a way that favors working conditions.
Por lo que se refiere al procesamiento de materiales con láser, este es un campo de aplicación del láser iniciado hace un par de décadas y que ha estado muy focalizado en el procesamiento de materiales metálicos (véanse a modo de ejemplo las siguientes obras: M. Bass. "Láser materials processing", North-Holland, Amsterdam (1983);As regards the processing of materials with laser, this is a field of application of the laser started a couple of decades ago and that has been very focused on the processing of metallic materials (see as an example the following works: M. Bass. "Laser materials processing", North-Holland, Amsterdam (1983);
O.D.D. Soares y M. Pérez-Amor, "Applied láser tooling", Martinus Nijhoff, DordrechtO.D.D. Soares and M. Pérez-Amor, "Applied laser tooling", Martinus Nijhoff, Dordrecht
(1987); W.M. Steen. "Láser material processing", Springer-Verlag, Londres (1991) ).(1987); W.M. Steen "Laser material processing", Springer-Verlag, London (1991)).
En la presente invención se presenta una aplicación del láser para el tratamiento de la pizarra natural.In the present invention an application of the laser for the treatment of natural slate is presented.
HOJA DE SUSTITUCIÓN (REGLA 26) Una de las ventajas de la presente patente es la posibilidad de realizar tratamientos sobre la pizarra imposibles de realizar por métodos mecánicos. Así es posible el corte de una placa de pizarra con cualquier forma o figura.SUBSTITUTE SHEET (RULE 26) One of the advantages of the present patent is the possibility of performing treatments on the board impossible to perform by mechanical methods. Thus it is possible to cut a slate plate with any shape or figure.
Por otra parte, esta patente presenta la ventaja de poder realizar taladros de una gran variedad de diámetros, desde las pocas decenas de micrómetros. cosa prácticamente imposible por métodos mecánicos.On the other hand, this patent has the advantage of being able to drill a wide variety of diameters, from a few tens of micrometers. practically impossible thing by mechanical methods.
Otra de las ventajas que presenta la invención objeto de la presente patente es el hecho de que el procesamiento se realiza sin contacto con la pieza, con lo que, en ningún caso se ve sometida a solicitaciones mecánicas durante el proceso del tratamiento láser, cosa que es inherente a los procesos mecánicos. Además, al no establecerse contacto alguno entre la pieza y la herramienta, ésta no sufre desgaste ni corrosión, por lo que no es necesario afilarla ni reemplazarla.Another of the advantages presented by the invention object of the present patent is the fact that the processing is carried out without contact with the part, so that, in no case is it subjected to mechanical solicitations during the laser treatment process, which It is inherent in mechanical processes. In addition, as no contact is established between the part and the tool, it does not suffer wear or corrosion, so it is not necessary to sharpen or replace it.
Asimismo, el procesado de pizarras mediante láser objeto de esta patente, permite la realización de diferentes tipos de tratamientos sin cambiar de herramienta, cosa imposible por métodos mecánicos.Likewise, the processing of blackboards by means of laser object of this patent, allows the realization of different types of treatments without changing tools, something impossible by mechanical methods.
El método de procesamiento de pizarra mediante láser objeto de la presente patente, consiste en someter la pieza de pizarra a la acción de la radiación láser. El tratamiento con el haz láser se realizará preferiblemente una vez esfoliada la pizarra al espesor deseado. Para los diferentes tipos de tratamientos debemos cumplir un determinado rango de condiciones y es, en definitiva, la interacción radiación láser-pizarra, la que marca el resultado final.The method of processing slate by laser object of the present patent, is to subject the slate piece to the action of laser radiation. The treatment with the laser beam will preferably be carried out once the board has been spilled to the desired thickness. For the different types of treatments we must meet a certain range of conditions and it is, in short, the interaction laser-slate radiation, which marks the final result.
El procesamiento de pizarra mediante láser objeto de la invención, se lleva a cabo en un sistema adecuado del cual se muestra un ejemplo en la figura 1. Este método consiste básicamente en lo siguiente: la pieza de pizarra (8) que se desea tratar, se sitúa sobre un soporte apropiado a sus dimensiones en un sistema móvil (9). Este sistema estará conectado a un sistema de control automático de la posición de la pieza, que, por ser de uso común en equipos industriales, no se muestra en la figura. El haz láser (1) es conducido por medio de un espejo refrigerado (2) y un tubo protector (3) hacia la pieza de pizarra (8). El haz láser (1 ) es focalizado por medio de una lente (5). Esta lente (5) estará realizada de tal forma y en un material tal que permita la transmisión de la energía del haz láser (1). Una vez focalizado, el haz láser (1) es conducido hacia la pieza a tratar (8) a través de una boquilla (7).The processing of slate by laser object of the invention is carried out in a suitable system of which an example is shown in Figure 1. This method basically consists of the following: the slate piece (8) to be treated, it is placed on a support appropriate to its dimensions in a mobile system (9). This system will be connected to a system of automatic control of the position of the piece, which, being commonly used in industrial equipment, is not shown in the figure. The laser beam (1) is conducted by means of a refrigerated mirror (2) and a protective tube (3) towards the slate piece (8). The laser beam (1) is focused by means of a lens (5). This lens (5) will be made in such a way and in a material that allows the transmission of the energy of the laser beam (1). Once focused, the laser beam (1) is led to the workpiece (8) through a nozzle (7).
Para evitar el daño de la lente (5) durante el procesado, se utiliza una ventana protectora (6). Los residuos del tratamiento láser se recogen mediante un colector adecuado (10). Cuando el tratamiento requiere el aporte de algún gas, éste se introduce por medio de la entrada de gases (4).To avoid damaging the lens (5) during processing, a protective window (6) is used. Waste from the laser treatment is collected by a suitable collector (10). When the treatment requires the contribution of some gas, it is introduced through the entry of gases (4).
HOJA DE SUSTITUCIÓN (REGLA 26) En el caso del perforado, no existe movimiento relativo entre el haz láser y la pieza de pizarra. Un ejemplo de perforado es el siguiente: placas de pizarra de 12 mm de espesor son taladradas por medio de un láser de Nd:YAG ( λ = 1.064 nm) trabajando en modo pulsado a una frecuencia de 10Hz. con un ancho de pulso de 3 ms, con gas nitrógeno a una presión de 4x10^ Pa y con una potencia de 60 W. Se obtuvieron taladros de 0.5 mm de diámetro.SUBSTITUTE SHEET (RULE 26) In the case of perforation, there is no relative movement between the laser beam and the slate piece. An example of perforation is as follows: 12 mm thick slate plates are drilled by means of a Nd: YAG laser (λ = 1.064 nm) working in pulsed mode at a frequency of 10Hz. with a pulse width of 3 ms, with nitrogen gas at a pressure of 4x10 ^ Pa and with a power of 60 W. Drills of 0.5 mm in diameter were obtained.
El corte de placas de pizarra se realiza moviendo bien la placa frente al haz láser o el haz láser con relación a la placa de pizarra. Es necesario utilizar un gas que elimine el material fundido para que éste no se resolidifique cerrando de nuevo la zona tratada por el haz láser. Un ejemplo de corte es el siguiente: placas de pizarra de 5 mm de espesor son cortadas por medio de un láser de Nd:YAG ( λ = 1.064 nm) trabajando en modo pulsado a una frecuencia de 75Hz, con un ancho de pulso de 0.5 ms, con gas nitrógeno a una presión de 4x10^ Pa y con una potencia de 300 W. En estas condiciones se obtuvieron cortes de excelente calidad a una velocidad de 30 mm/s. En el caso del marcado sólo se evapora la capa superficial de la placa de pizarra.The cutting of slate plates is done by moving the plate well in front of the laser beam or the laser beam in relation to the slate plate. It is necessary to use a gas that removes molten material so that it does not resolve by closing the area treated by the laser beam again. An example of cutting is as follows: 5 mm thick slate plates are cut by means of a Nd: YAG laser (λ = 1.064 nm) working in pulsed mode at a frequency of 75Hz, with a pulse width of 0.5 ms, with nitrogen gas at a pressure of 4x10 ^ Pa and with a power of 300 W. Under these conditions, excellent quality cuts were obtained at a speed of 30 mm / s. In the case of marking, only the surface layer of the slate plate evaporates.
Un ejemplo de marcado es el siguiente: placas de pizarra de cualquier espesor son marcadas por medio de un láser de Nd:YAG ( λ •****- 1.064 nm) trabajando en modo pulsado a una frecuencia de 30Hz, con un ancho de pulso de 0.5 ms, con gas nitrógeno a una presión de 4x10*5 Pa y con una potencia de 70 W. Con estas condiciones se marcaron piezas de pizarra a una velocidad de 30 mm/s.An example of marking is as follows: slate plates of any thickness are marked by means of an Nd: YAG laser (λ • **** - 1,064 nm) working in pulsed mode at a frequency of 30Hz, with a width of 0.5 ms pulse, with nitrogen gas at a pressure of 4x10 * 5 Pa and with a power of 70 W. Under these conditions, slate pieces were marked at a speed of 30 mm / s.
Si se reduce la densidad de energía sobre la pieza, es posible realizar tratamientos superficiales diferentes de la mera evaporación del material que tiene lugar durante el marcado. Un ejemplo de tratamiento superficial es el siguiente: placas de pizarra de cualquier espesor son vitrificadas superficialmente por medio de un láser de Nd:YAG (λ= 1.064 nm) trabajando en modo pulsado a una frecuencia de 20Hz, con un ancho de pulso de 0.3 ms. sin aporte de gas alguno y con una potencia de 100 W. Con estas condiciones se vitrificó la superficie de piezas de pizarra a una velocidad de 30 mm/s.If the energy density on the part is reduced, it is possible to perform surface treatments other than the mere evaporation of the material that takes place during marking. An example of surface treatment is as follows: slate plates of any thickness are superficially vitrified by means of a Nd: YAG laser (λ = 1.064 nm) working in pulsed mode at a frequency of 20Hz, with a pulse width of 0.3 ms. without any contribution of gas and with a power of 100 W. Under these conditions the surface of slate pieces was vitrified at a speed of 30 mm / s.
La gran flexibilidad de este método permite realizar diferentes tipos de procesos sobre la misma pieza de pizarra sin necesidad de cambiar de equipo o de herramienta, tan sólo es necesario modificar los parámetros de procesamiento.The great flexibility of this method allows different types of processes to be carried out on the same piece of slate without the need to change equipment or tools, it is only necessary to modify the processing parameters.
El método descrito supone una considerable mejora en las condicionies de trabajo del operario que debe procesar las placas de pizarra, eliminándose, en gran medida, los contaminantes acústicos y ambientales que se padecen durante el procesamiento de las placas de pizarra por los métodos tradicionales.The described method supposes a considerable improvement in the working conditions of the operator who must process the slate plates, eliminating, to a large extent, the acoustic and environmental contaminants that are suffered during the processing of the slate plates by traditional methods.
HOJA DE SUSTITUCIÓN (REGLA 26) SUBSTITUTE SHEET (RULE 26)

Claims

REIVINDICACIONES
1.- Un método para el tratamiento de pizarra por medio de láser. Este método consiste en lo siguiente: a) Posicionamiento de la pieza de pizarra a tratar, sobre un soporte adecuado a sus dimensiones, en un sistema móvil conectado a un equipo cualquiera de control de la posición de la pieza. b) Irradiación de la pieza de pizarra a tratar por medio de un haz láser. c) Evaporación y/o fusión y/o modificación de la superficie y/o de todo el volumen de pizarra irradiado por el haz láser.1.- A method for the treatment of slate by means of laser. This method consists of the following: a) Positioning of the slate piece to be treated, on a support adapted to its dimensions, in a mobile system connected to any equipment for controlling the position of the piece. b) Irradiation of the piece of slate to be treated by means of a laser beam. c) Evaporation and / or fusion and / or modification of the surface and / or of the entire slate volume irradiated by the laser beam.
2.- Un método de acuerdo con la reivindicación 1, en el cual se utiliza cualquier tipo de gas, con cualquier composición química, como purga o gas auxiliar al tratamiento láser. 2. A method according to claim 1, in which any type of gas is used, with any chemical composition, as a purge or gas auxiliary to the laser treatment.
3.- Un método de acuerdo con las reivindicaciones 1 y 2. en el cual el sistema móvil conectado a un equipo cualquiera de control de la posición de la pieza consista en un robot de cualquier tipo, en una mesa de coordenadas de cualquier tipo, o en una combinación de ambos sistemas. 3. A method according to claims 1 and 2. in which the mobile system connected to any piece of equipment for controlling the position of the part consists of a robot of any type, in a coordinate table of any type, or in a combination of both systems.
4.- Un método de acuerdo con las reivindicaciones 1 a 3, en el cual el haz láser provenga de un láser de cualquier longitud de onda, potencia, frecuencia o calidad de haz, como, por ejemplo, láser de CO2, de CO, de N2, de Nd:YAG, de Er:YAG, de Nd:vidrio, de Rubí, de HeNe. de HeCd, de HeHg, de Cu, de I, de Ar, de Kr, de diodo, químicos, de excímeros, de alejandrita. de esmeralda, de colorante, o cualquier otro tipo de láser. 4. A method according to claims 1 to 3, wherein the laser beam comes from a laser of any wavelength, power, frequency or beam quality, such as CO2, CO laser, of N2, of Nd: YAG, of Er: YAG, of Nd: glass, of Ruby, of HeNe. HeCd, HeHg, Cu, I, Ar, Kr, diode, chemicals, excimers, alexandrite. Emerald, dye, or any other type of laser.
5.- Un método de acuerdo con las reivindicaciones 1 a 4. en el cual una pieza de pizarra de cualquier forma, tipo, composición química y dimensiones es cortada siguiendo una trayectoria de cualquier forma. 5. A method according to claims 1 to 4. in which a piece of slate of any shape, type, chemical composition and dimensions is cut along a path of any shape.
6.- Un método de acuerdo con las reivindicaciones 1 a 4, en el cual una pieza de pizarra de cualquier forma, tipo, composición química y dimensiones es marcada siguiendo una trayectoria de cualquier forma. 6. A method according to claims 1 to 4, in which a piece of slate of any shape, type, chemical composition and dimensions is marked along a path of any shape.
7 '.- Un método de acuerdo con las reivindicaciones 1 a 4. en el cual una pieza de pizarra de cualquier forma, tipo, composición química y dimensiones es vitrificada superficialmente siguiendo una trayectoria de cualquier forma. 7 '.- A method according to claims 1 to 4 in which a piece of slate in any form, type, chemical composition and dimensions is vitrified surface following a path in any way.
8.- Un método de acuerdo con las reivindicaciones 1 a 4. en el cual una pieza de pizarra de cualquier forma, tipo, composición química y dimensiones es modificada superficialmente siguiendo una trayectoria de cualquier forma.8. A method according to claims 1 to 4. in which a piece of slate of any shape, type, chemical composition and dimensions is modified superficially following a path of any shape.
HOJA DE SUSTITUCIÓN (REGLA 26) SUBSTITUTE SHEET (RULE 26)
9.- Un método de acuerdo con las reivindicaciones 1 a 4, en el cual una pieza de pizarra de cualquier forma, tipo, composición química y dimensiones es perforada siguiendo una trayectoria de cualquier forma.9. A method according to claims 1 to 4, in which a piece of slate of any shape, type, chemical composition and dimensions is perforated following a path of any shape.
10.- Una placa o pieza de pizarra tratada por láser mediante un método de acuerdo con las reivindicaciones 1 a 9.10. A plate or piece of slate treated by laser by a method according to claims 1 to 9.
HOJA DE SUSTITUCIÓN (REGLA 26) SUBSTITUTE SHEET (RULE 26)
PCT/ES1999/000042 1998-02-19 1999-02-18 Treatment of slate by means of a laser WO1999042242A1 (en)

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Application Number Priority Date Filing Date Title
AU29350/99A AU2935099A (en) 1998-02-19 1999-02-18 Treatment of slate by means of a laser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP9800391 1998-02-19
ES009800391A ES2142268B1 (en) 1998-02-19 1998-02-19 SLATE PROCESSING THROUGH LASER.

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WO1999042242A1 true WO1999042242A1 (en) 1999-08-26

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ES (1) ES2142268B1 (en)
WO (1) WO1999042242A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1273410A1 (en) * 2001-07-06 2003-01-08 Universidade de Vigo Laser treatment method of the surface of granite slabs or similar

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2263321B1 (en) * 2004-02-04 2007-11-01 Yesyforma Europa, S.A. PROCEDURE FOR MARKING A ROOF PLATE FOR ROOF AND PLATE AS GOT.

Citations (5)

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FR2541929A1 (en) * 1983-03-02 1984-09-07 Lepiouffle Georges Device for cutting natural or artificial slates of any material and of any shape
US4797532A (en) * 1986-03-26 1989-01-10 Maiorov Vladimir S Apparatus for laser treatment of materials
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ES2142268A1 (en) 2000-04-01
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