EP3771537B1 - Procédé de traitement de chants - Google Patents

Procédé de traitement de chants Download PDF

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Publication number
EP3771537B1
EP3771537B1 EP20186854.4A EP20186854A EP3771537B1 EP 3771537 B1 EP3771537 B1 EP 3771537B1 EP 20186854 A EP20186854 A EP 20186854A EP 3771537 B1 EP3771537 B1 EP 3771537B1
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EP
European Patent Office
Prior art keywords
workpiece
imaging system
processing method
edging strip
edge processing
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.)
Active
Application number
EP20186854.4A
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German (de)
English (en)
Other versions
EP3771537A1 (fr
EP3771537C0 (fr
Inventor
Kevin Christoph Bilges
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.)
IMA Schelling Deutschland GmbH
Original Assignee
IMA Schelling Deutschland GmbH
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Publication date
Application filed by IMA Schelling Deutschland GmbH filed Critical IMA Schelling Deutschland GmbH
Publication of EP3771537A1 publication Critical patent/EP3771537A1/fr
Application granted granted Critical
Publication of EP3771537B1 publication Critical patent/EP3771537B1/fr
Publication of EP3771537C0 publication Critical patent/EP3771537C0/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge

Definitions

  • the invention relates to an edge processing method according to the preamble of claim 1 or according to the preamble of claim 2. Such a method is known from the document EN 10 2015 219257 A1 known.
  • the edge processing method is used in the processing of panel-shaped workpieces made of wood or wood substitutes, in which one edge strip or a plurality of edge strips is/are attached to the narrow side of the panel-shaped workpiece.
  • the corresponding edge strip is drawn around the narrow side so that both ends of the edge strip meet in a joint area.
  • One method by which this is done is, for example, EP 0 510 231 A1 known.
  • the end of an edge band running around the narrow side of a workpiece is detected by means of a sensor, whereupon a cutting device is controlled, which cuts the edge band still on the roll to the required length before the edge band can be placed on the workpiece and the joint area is formed.
  • Another method in which a joint is formed between two edge band ends is known from EN 20 2018 100 420 U1 known.
  • the devices and processes mentioned do not allow any information to be obtained about the quality of the butt joint in the joint area.
  • the formation of the joint area is of crucial importance with regard to the processing quality. If, for example, the butt joint is too wide, the corresponding panel-shaped workpiece cannot be further processed or picked. The edge strip must be removed and reapplied.
  • the joint bonding is usually checked visually by a person and then a decision is made as to whether the workpiece meets the quality requirements. This is particularly time-consuming when processing panel-shaped workpieces mechanically, which is why there is a desire to automate the inspection process to a large extent in order to be able to identify parts with insufficient butt gluing and process them further accordingly.
  • the object of the present invention is therefore to provide an edge processing method which enables a large-scale automation of the said process.
  • an imaging method is used to check the joint area of the workpiece and to decide whether the joint area meets the quality requirements or not.
  • the edge processing method according to the invention at least one edge strip is pressed onto the narrow side of a plate-shaped workpiece made of wood or wood substitute by means of a pressing device with relative movement of the pressing device and the workpiece and is attached while heating a connecting means provided on the edge strip and/or the workpiece.
  • the attachment is carried out either in such a way that one end of the edge strip on the workpiece forms a joint area with the other end of the edge strip or one end of another edge strip.
  • the attachment can be carried out in such a way that the side of the edge strip facing the workpiece forms a joint area with the workpiece.
  • the edge strip(s), namely the abutment area or the joint area, is/are guided along the pressure device by means of a imaging system, in particular an infrared camera or a hyperspectral camera or a light section sensor.
  • a imaging system in particular an infrared camera or a hyperspectral camera or a light section sensor.
  • This image capture enables the corresponding image of the joint area or joint region to be evaluated immediately and the evaluation result to be forwarded to the machine control system, which then decides whether the corresponding workpiece must be subjected to a new coating process with edge strips or whether it can be fed into the further planned processing or picking process as a good part.
  • the distance between the ends forming the joint area or the distance in the joint area between the edge strips and the workpiece can be determined from the thermal image captured by the imaging system. By determining this distance, the distance determined in this way can be compared with a predetermined minimum distance or maximum value stored in the machine control system that meets the quality requirements. In this way, a decision can be made as to whether or not a good part is present.
  • a further development of the method according to the invention provides that immediately after the aforementioned comparison check, the edge strip(s) is/are removed from the workpiece again if the determined distance exceeds the predetermined maximum value.
  • an image, in particular a 2D image or 3D image, of the temperature distribution of the at least one edge strip is recorded using the imaging system.
  • the temperature distribution can be used to determine, for example, whether the adhesive used has reached the required temperature at all points or whether it has fallen below this temperature. If the temperature distribution shows, for example, locally too low temperatures, it may be that the edge strip is not adhering sufficiently to the workpiece and therefore needs to be removed again.
  • the image is captured by the imaging system in a spectral range between 400 nm and 2500 nm.
  • the joint or joint area can be measured well, and a temperature distribution that is usually in the infrared range can also be recorded.
  • the connecting means comprises a hot melt adhesive and/or a meltable functional layer provided on an edge strip.
  • the functional layer can be melted by a laser source and/or infrared source and/or ultrasound source and/or magnetic field source and/or microwave source and/or hot air source and/or plasma source or is melted by at least one of the sources mentioned.
  • FIGS. 3a and 3b show a workpiece section in perspective view from above, in which a joint area is checked with a light section sensor.
  • a plate-shaped workpiece 1 is schematically indicated, which is coated with an edge strip 2 on its narrow side.
  • the edge strip 2 which is previously activated, ie made sticky, is attached to the narrow side of the workpiece 1 and pressed by means of a pressure roller 31.
  • the pressure roller 31 is part of a device 3 which comprises an imaging system 33, in particular an infrared camera or a hyperspectral camera or a light section sensor.
  • the tracking roller 32 is provided according to the invention to ensure that the distance of the imaging system 33 from the edge strip does not change, but remains constant. As in the image of the Figure 1 shown, the imaging system 33 is guided along the pressure roller 31.
  • the relative direction of movement X only indicates that the device 3 - the pressure roller 31 and the imaging system 33 can also be moved separately and independently of each other - and the workpiece 1 must move relative to each other. This can be done in a continuous process, but of course it can also be used in a machining center.
  • the schematic illustration of the Figure 1 can be applied to both situations.
  • the abutment region S is shown as an example, which is generated either by two ends 2a, 2a' of the same edge strip 2 or two abutting ends of two different edge strips 2, 2'.
  • the imaging system 33 is in the Figure 2
  • the sensor is now positioned above the butt joint in the situation shown and can capture this image.
  • An evaluation device determines either a temperature profile, which is recorded with the imaging system 33 during the movement over the attached edge strips 2 in order to check whether the edge strip 2 is equally well connected to the workpiece 1 everywhere.
  • the evaluation device can determine the width of the joint from the image of the butt joint recorded by the imaging process and compare this with a threshold value which, for example, contains a maximum value for the width of the butt joint.
  • the evaluation device can then decide whether or not the edge strip 2 needs to be removed from the workpiece 1.
  • the corresponding instructions can then be passed on to the machine control system.
  • the imaging system 33 is formed by a light section sensor.
  • a light source preferably a laser light source, sends a light beam 4 expanded to a line onto the surface of the workpiece 1, from where it is reflected or scattered.
  • the light section sensor also includes a surface light detection system, which is preferably a CCD camera that captures an image of the surface of the workpiece 1 in the area of the incident light beam 4.
  • the incident light beam 4 and the light beam 4' captured by the light detection system are not in the same plane.
  • the An evaluation system (not shown here) which determines the position of the detected light beam 4' in the areal light detection system can calculate a height profile of the surface of the workpiece 1 using the principle of triangulation via the offset of the detected light beam 4' in the light detection system.
  • the workpiece 1 moves under the imaging system 33 in the x direction. It is also possible for the workpiece 1 to remain at rest while the imaging system 33 is moved over the surface of the workpiece 1.
  • the end 2a of an edge strip 2 moves under the light beam 4.
  • the larger part of the light beam 4 hits the edge strip 2, while in a smaller part of the light beam 4 (top left) the end 2a of the edge strip has already moved under the light beam 4 and the light beam 4 hits the joint area S between the edge strips 2, 2'.
  • the detected light beam 4' has an offset from which the evaluation system can detect a step on the surface.
  • the height of the step is determined from the strength of the offset, and the position of the step is determined from the course of the offset across the light beam 4. of the edges and over the duration of the offset the width of the joint area S, so that the evaluation system can evaluate the joint area well.
  • the light detection system is preferably a CCD camera. It is not necessary for the system to work in the visible range of light. It is also conceivable that IR light is used, so that an infrared camera or even a hyperspectral camera can be used. In addition to the light line, the temperature distribution on the surface can also be recorded in order to determine the quality of the edge strip bonding, for example.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Laser Beam Processing (AREA)

Claims (9)

  1. Procédé de traitement de chants, dans lequel au moins une bande de bordure (2, 2') est pressée au côté étroit d'une pièce en forme de plaque (1) en bois ou en matériau de substitution de bois par l'intermédiaire d'un moyen de pression (31) sous un mouvement relatif du moyen de pression (31) et de la pièce (1) et est appliquée ainsi sous chauffage d'un moyen de liaison prévu sur la bande de bordure (2, 2') et/ou la pièce (1),
    dans lequel le côté de la bande de bordure (2, 2') tourné vers la pièce (1) forme une zone des joints avec la pièce (1),
    caractérisé en ce
    que la zone de jointure (S) de la /des bande(s) de bordure (2, 2') est saisie par l'image par l'intermédiaire d'un système d'imagerie (33) asservi au moyen de pression (31).
  2. Procédé de traitement de chants, dans lequel au moins une bande de bordure (2, 2') est pressée au côté étroit d'une pièce en forme de plaque (1) en bois ou en matériau de substitution de bois par l'intermédiaire d'un moyen de pression (31) sous un mouvement relatif du moyen de pression (31) et de la pièce (1) et est appliquée ainsi sous chauffage d'un moyen de liaison prévu sur la bande de bordure (2, 2') et/ou la pièce (1), dans lequel le côté de la bande de bordure (2, 2') tourné vers la pièce (1) forme une zone des joints avec la pièce (1),
    caractérisé en ce
    que le moyen de pression (31) est un rouleau de pression (31), dans lequel le rouleau de pression (31) est une partie d'un moyen comportant un système d'imagerie (33), dans lequel la zone des joints entre la bande de bordure (2, 2') et la pièce (1) est saisie par l'image par l'intermédiaire du système d'imagerie (33) asservi au moyen de pression (31), dans lequel la distance entre bande de bordure (2, 2') et système d'imagerie (33) est maintenue constante par l'intermédiaire d'un rouleau de suivi (32).
  3. Procédé de traitement de chants selon la revendication 1 ou 2,
    caractérisé en ce
    qu'à partir de l'image par rayonnement thermique saisie par le système d'imagerie (33), la distance entre les extrémités (2a', 2a) formant la zone de jointure (S) ou la distance dans la zone des joints entre la bande de bordure (2, 2') et la pièce (1) est déterminée.
  4. Procédé de traitement de chants selon la revendication 3,
    caractérisé en ce
    que la distance déterminée est comparée à une valeur maximale prédéterminée.
  5. Procédé de traitement de chants selon la revendication 4,
    caractérisé en ce
    que la ou les bande(s) de bordure (2, 2') est/sont enlevée(s) de la pièce (1) lorsque la distance déterminée dépasse la valeur maximale prédéterminée.
  6. Procédé de traitement de chants selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'avec le système d'imagerie (33) une image, surtout une image en 2-D ou une image en 3-D, de la distribution de température de l'au moins une bande de bordure (2, 2') est prise.
  7. Procédé de traitement de chants selon la revendication 6,
    caractérisé en ce
    que l'image est saisie par le système d'imagerie dans une bande spectrale dans la plage 400 nm à 2500 nm.
  8. Procédé de traitement de chants selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que le moyen de liaison comporte une colle à fusion et/ou une couche fonctionnelle de fusion prévu sur une bande de bordure (2, 2') qui peut être appliquée par fusion ou est appliquée par fusion par l'intermédiaire d'une source laser et/ou source infrarouge et/ou source d'ultrasons et/ou source de champ magnétique et/ou source de micro-ondes et/ou source d'air chaud et/ou source de plasma.
  9. Procédé de traitement de chants selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que le système d'imagerie est une caméra infrarouge ou une caméra hyperspectrale ou un capteur de coupe optique (capteur de profil).
EP20186854.4A 2019-07-29 2020-07-21 Procédé de traitement de chants Active EP3771537B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019120376.7A DE102019120376A1 (de) 2019-07-29 2019-07-29 Kantenverarbeitungsverfahren

Publications (3)

Publication Number Publication Date
EP3771537A1 EP3771537A1 (fr) 2021-02-03
EP3771537B1 true EP3771537B1 (fr) 2024-06-19
EP3771537C0 EP3771537C0 (fr) 2024-06-19

Family

ID=71738026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20186854.4A Active EP3771537B1 (fr) 2019-07-29 2020-07-21 Procédé de traitement de chants

Country Status (2)

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EP (1) EP3771537B1 (fr)
DE (1) DE102019120376A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022125543A1 (de) 2022-10-04 2024-04-04 Ima Schelling Deutschland Gmbh Kantenverarbeitungsverfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014214363A1 (de) * 2014-07-23 2016-01-28 Türmerleim Gmbh Verfahren und Vorrichtung zur Beeinflussung und Regelung eines Verleimungsprozesses
DE102016213216A1 (de) * 2015-07-21 2017-01-26 Biesse S.P.A. Maschine zum Kantenleimen von Platten aus Holz oder Ähnlichem
DE102015219257A1 (de) * 2015-10-06 2017-04-06 Homag Gmbh Bearbeitungsmaschine und Verfahren zur Bearbeitung von Werkstücken

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2071152T3 (es) * 1991-04-25 1995-06-16 Homag Maschinenbau Ag Aparato para el encolado de bordes de cinta o de tira sobre materiales en forma de placas.
DE10201413A1 (de) * 2002-01-15 2003-07-24 Buerkle Gmbh Robert Verfahren und Vorrichtung zum Beschicken einer Plattenpresse
DE102014008455A1 (de) * 2014-06-05 2015-12-17 Ima Klessmann Gmbh Holzbearbeitungssysteme Vorrichtung und Verfahren zum Aufbringen eines Kantenbandes auf eine Schmalseite eines Werkstücks
DE102015114486A1 (de) * 2015-08-31 2017-03-02 Faurecia Innenraum Systeme Gmbh Verfahren zur Herstellung eines Verkleidungselements mit mindestens einer Platte aus holzartigem Material und zugehörige Herstellungsanordnung
DE202018100420U1 (de) * 2017-02-09 2018-04-05 Christof Schulte-Göbel Vorrichtung zum Anbringen von Kantenstreifen
DE102017205208A1 (de) * 2017-03-28 2018-10-04 Homag Gmbh Vorrichtung und Verfahren zum Beschichten eines Werkstücks
DE102017114970A1 (de) * 2017-07-05 2019-01-10 Homag Gmbh Vorrichtung und Verfahren zum Veredeln von Werkstücken

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014214363A1 (de) * 2014-07-23 2016-01-28 Türmerleim Gmbh Verfahren und Vorrichtung zur Beeinflussung und Regelung eines Verleimungsprozesses
DE102016213216A1 (de) * 2015-07-21 2017-01-26 Biesse S.P.A. Maschine zum Kantenleimen von Platten aus Holz oder Ähnlichem
DE102015219257A1 (de) * 2015-10-06 2017-04-06 Homag Gmbh Bearbeitungsmaschine und Verfahren zur Bearbeitung von Werkstücken

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Publication number Publication date
EP3771537A1 (fr) 2021-02-03
EP3771537C0 (fr) 2024-06-19
DE102019120376A1 (de) 2021-02-04

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