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EP3150344B1 - Dispositif d'alignement pour aligner des pièces à usiner et machine d'usinage - Google Patents

Dispositif d'alignement pour aligner des pièces à usiner et machine d'usinage Download PDF

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Publication number
EP3150344B1
EP3150344B1 EP16191748.9A EP16191748A EP3150344B1 EP 3150344 B1 EP3150344 B1 EP 3150344B1 EP 16191748 A EP16191748 A EP 16191748A EP 3150344 B1 EP3150344 B1 EP 3150344B1
Authority
EP
European Patent Office
Prior art keywords
alignment
workpiece
speed
transport direction
support element
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
EP16191748.9A
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German (de)
English (en)
Other versions
EP3150344A1 (fr
Inventor
Achim Herbstreuth
Joachim Blöchle
Michael Müller
Harald Sieber
Wolfgang Heim
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.)
Homag GmbH
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Homag GmbH
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Publication of EP3150344B1 publication Critical patent/EP3150344B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes

Definitions

  • the invention relates to a method for feeding preferably plate-shaped workpieces, according to the preamble of claim 1.
  • a method for feeding preferably plate-shaped workpieces is known from the document US6189682 B1 known.
  • the invention relates to a processing machine.
  • Alignment devices and methods of the type mentioned above are used, for example, when feeding workpieces, particularly plate-shaped ones, to processing machines.
  • the known embodiments of alignment devices and methods use, for example, transport roller systems when aligning the workpiece.
  • slippage often occurs between the transport system and the workpiece due to the inertia of the mass when the workpiece is accelerated or decelerated. This results in deviations in the time interval from component to component. and the part spacing between two consecutive workpieces (usually recorded as the distance between the rear edge of a leading workpiece and the front edge of a trailing workpiece).
  • These deviations from required target values inevitably lead to a reduction in the performance of the downstream processing machine.
  • an alignment ruler positioned transversely to the transport direction is used to align a workpiece.
  • Such a device and method are based on the workpiece being brought to a standstill on the alignment ruler during movement/feeding and immediately in front of the processing machine in order to be aligned at an angle. After alignment, the alignment ruler clears the transport path of the workpiece again by moving it out of the transport plane.
  • the transport plane refers to the plane in which the workpieces are moved. Because the workpiece is braked during movement/feeding and must then be accelerated again, incalculable time losses arise that can no longer be compensated before feeding into the processing machine.
  • the US6,189,682 B1 shows a conveyor that allows blocks to be placed on each loader of the conveyor.
  • the object of the present invention is to efficiently arrange the feeding of workpieces, in particular plate-shaped workpieces, to a processing machine at previously defined distances or time intervals and the alignment of said workpieces in front of the processing machine.
  • high productivity should also be ensured by a constant flow of parts and a high variability in terms of workpiece sizes with a structurally simple design.
  • the workpieces conveyed by the method according to claim 1 can be components such as floor panels, doors, table tops, furniture fronts, kitchen worktops or the like.
  • Such workpieces, preferably in the form of plates, can be fed to a processing machine in order to machine them, for example.
  • an alignment device which can be used as a feed device, for example, comprises a conveyor device for moving workpieces with an initial speed v 0 in a transport direction to an alignment section.
  • the transport direction from the conveyor device for example to the processing machine or another transport path or from the alignment section into a compensation section explained in more detail below, is referred to as the transport direction.
  • the alignment section has at least one alignment device for aligning the workpieces moved by the conveyor device on a workpiece edge running transversely to the transport direction.
  • the at least one alignment device is arranged on a circumferential support element so that it can be moved in sections in the transport direction.
  • the rotating carrier element can be guided over deflection rollers spaced apart in the transport direction. At least one of the deflection rollers can be driven. Furthermore, it is preferred that the deflection rollers are arranged in a horizontal plane.
  • the movement of the carrier element can be characterized by its rotational speed, which corresponds to the first speed v 1 .
  • the first speed v 1 is usually selected such that it is smaller than the initial speed v 0 of the workpieces. In this case, a front edge of a workpiece moved by the conveyor device would come into contact with the alignment device, which in a specific example is formed by a cam, and would be aligned due to the speed difference.
  • the first speed v 1 speed of the alignment device
  • the initial speed v 0 initial speed of the workpiece
  • the movable alignment device eliminates the need to stop the workpiece for alignment and to then release and accelerate again so that the time loss due to alignment is controlled and regulated.
  • the conveyor device runs in sections adjacent to the rotating support element, with an end section of the conveyor device being located beyond an end section of the rotating support element in the transport direction.
  • a compensation section can be formed, for example, directly adjacent to the alignment section.
  • a compensation section for changing the speed of the workpiece is provided after the alignment section on the side facing the processing machine and comprises at least one conveyor device, in particular a conveyor belt.
  • the target speed of the workpiece that is given to the workpiece in the compensation section is a second speed v 2 , which can usually be selected to be higher than a first speed v 1 .
  • Adjusting the speed of the aligned workpiece enables a correction of the time interval between workpieces or an adjustment of the part distance and contributes to the exact adherence to a pre-determined/pre-calculated time interval and therefore to increasing the performance of the processing machine.
  • the movable alignment device can be formed by at least one cam that projects into the plane of the transport.
  • the plane of the transport refers to the plane in which the workpieces are moved.
  • the cam is arranged on the carrier element rotating in the transport direction at the first speed v 1. Alignment takes place through the contact of the first edge of the workpiece in the transport direction with the movable cam.
  • the carrier element is provided with two or more cams for aligning the workpiece. Since the carrier element has several cams, a receiving position for the subsequent workpiece can be reached more quickly with a further cam compared to a carrier element with one cam and/or the alignment can be carried out more precisely due to a greater guide length between the plurality of cams.
  • cams on the carrier element in such a way that they are equidistant from one another in relation to the total length of the carrier element. This configuration can increase the efficiency of the alignment device, since the carrier element does not have to be moved as far between the neutral position described later and the receiving position for a subsequent workpiece.
  • a plurality of belts are provided in the alignment section, which circulate in the transport direction and are spaced apart from one another transversely to the transport direction.
  • the belts are preferably driven synchronously with one another, so that the cams on the belts arranged next to one another together form the alignment device for the workpiece.
  • the guide length for alignment can be increased, so that the accuracy of the alignment process is improved. For example, it is It is possible to align workpieces with high precision that have a relatively large width in the transverse direction (perpendicular to the conveying direction).
  • the alignment device preferably has a control device for setting and changing the rotational speed of the carrier element, which corresponds to the first speed, and optionally the second speed.
  • a control device for setting and changing the rotational speed of the carrier element, which corresponds to the first speed, and optionally the second speed.
  • the first case of a positive correction is carried out when the current batch change time is greater than the required batch change time. This means that the part distance between the workpieces must be reduced. This is done by increasing the second speed within the compensation section.
  • a negative correction the workpiece is transported within the compensation section at a lower second speed, so that the part distance is increased. If the current batch change time corresponds to the required batch change time, there is no need for a further positive or negative correction.
  • the invention also includes a processing machine, in particular an edge processing machine with an alignment device, which can have both the preceding features and the advantages mentioned, wherein the processing machine provides a subordinately arranged processing section with a processing tool, in particular a milling cutter.
  • the alignment device can be coupled to a transport device by means of which workpieces are moved.
  • the alignment device can be used to align and, if necessary, buffer workpieces.
  • a packaging unit for packaging the workpieces, a stacking device for stacking the workpieces or the like can be provided.
  • the alignment device can be moved against the transport direction and advanced upwards by a movement in a vertical direction in order to engage with a workpiece.
  • Fig.1 shows a perspective view of an exemplary embodiment of an alignment device with an alignment section 10 and a compensation section 20.
  • the alignment device is used as a feed device with which workpieces are conveyed into an edge processing machine and aligned in the process.
  • the alignment device comprises several in one transport direction 50 (in Fig.1 illustrated by an arrow) for conveying plate-shaped workpieces.
  • the conveying devices 21, 22 (here: conveyor belts) are driven by a common motor 24.
  • the extension direction of the conveyor devices 21 and the conveyor devices 22 is different in the transport direction 50.
  • the conveyor devices 21, 22 can also have the same extension in the transport direction.
  • the alignment section 10 in the present embodiment, seven belts 11 (support elements) are shown, which are spaced apart from one another transversely to the transport direction 50. However, the number of belts can deviate from the number mentioned.
  • the belts 11 are driven by a common motor 13.
  • Each of the belts 11 has two cams 12 (alignment devices) which are attached to the belt 11 at equal distances.
  • the dashed line in Figure 1 which is created by the conceptual connection of the cams adjacent in the transverse direction, represents the totality of the movable cams with a certain guide length. In this way, a workpiece can be placed on several cams arranged next to one another in order to align it.
  • the conveyor devices 21, 22 are arranged in the compensation section 20, but not the belts 11 with the cams 12. An upstream transport and a downstream processing machine are not shown.
  • FIG. 2 A side view of the alignment device is shown in Fig. 2 shown.
  • the workpiece 40 is introduced into the alignment section 10 by the upstream transport (not shown) at the initial speed v 0.
  • the initial speed v 0 corresponds to the rotational speed of the conveyor devices 21, 22.
  • the belt 11 and thus also the cam 12 located thereon, which points upwards in a vertical direction, is moved at a first speed v 1 in the transport direction 50.
  • the position shown of the cam 12 protruding into the plane of the transport is referred to as the receiving position.
  • the initial speed v 0 is greater than the first speed v 1 (v 0 > v 1 ).
  • the first (front) edge 41 of the workpiece 40 in the transport direction comes into contact with the cam 12.
  • the workpiece 40 is conveyed by the upstream transport and the conveyor belts 21, 22 against the cams 12, which are moved at the first speed v 1 .
  • the workpiece 40 is aligned in the alignment section 10 on at least one cam 12.
  • the alignment takes place over a certain distance within the alignment section 10, as long as the cam 12 projects into the plane of the transport 50 and/or the first speed v 1 is less than the initial speed v 0 or less than the second speed v 2.
  • the alignment distance in the embodiment shown is approximately 450 mm.
  • the first speed v 1 of the belt 11 is increased to such an extent that the cam 12 detaches from and removes the first edge 41 of the workpiece 40 in the transport direction 50. This releases the workpiece 40.
  • the belt 11 is braked.
  • the neutral position is characterized in the embodiment shown in that both cams 12 arranged on the belt 11 are in a plane parallel to the plane of the transport 50.
  • the speed of the belt 11 or the belts 11 can be reduced to as low as 0 m/s in the neutral position.
  • the workpiece 40 is conveyed further by the conveyor belts 21, 22. These devices impose the desired speed v 2 on the released workpiece 40.
  • the second speed v 2 is selected so that the required batch change time or the required part distance is maintained.
  • the second speed v 2 can be equal to the speed v 0. This means that the conveyor devices 21, 22 are not accelerated or decelerated by the cams after the workpiece 40 is released.
  • the second speed v 2 (speed within the compensation section 20) differs from the speed v 0 and the workpiece is slowed down or accelerated again after release from the cams 12.
  • the certain area of the alignment section 10 preferably includes the first 120 mm of the alignment section.
  • a maximum distance of 400 mm is available for correcting the batch change time within the compensation section 20.
  • a second speed v 2 of a maximum of 50 m/min or a maximum acceleration of 5 m/s 2 can be applied to the workpiece 40 by the conveyor belt 21, 22.
  • the first speed v 1 (speed of the cams 12) is selected to be greater than the initial speed v 0 of the workpiece. This variant is used when the cams 12 engage a rear edge 42 of the workpiece 40 and thereby push the workpiece in the transport direction.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Attitude Control For Articles On Conveyors (AREA)

Claims (14)

  1. Procédé de fourniture de pièces à travailler de préférence en forme de plaque avec un dispositif d'orientation pour l'orientation des pièces à travailler (40) qui se composent de préférence au moins partiellement de bois, de matériaux dérivés du bois, de matière plastique ou similaires, dans lequel le dispositif d'orientation présente
    un dispositif de transport (21, 22) pour le déplacement de pièces à travailler (40) dans un sens de transport (50) et
    une section d'orientation (10) avec au moins un système d'orientation (12) pour l'orientation d'un bord d'une pièce à travailler (40) s'étendant transversalement au sens de transport (50),
    dans lequel l'au moins un système d'orientation (12) est disposé au niveau d'un élément porteur (11) rotatif, en particulier une courroie de sorte que celui-ci soit mobile par sections dans le sens de transport,
    caractérisé en ce que
    le dispositif de transport (21, 22) s'étend par sections de manière contigüe à l'élément porteur (11) rotatif, et dans lequel une section d'extrémité du dispositif de transport (21, 22) dans le sens de transport (50) se trouve au-delà d'une section d'extrémité de l'élément porteur (11) rotatif, dans lequel le procédé comprend les étapes suivantes :
    - la fourniture d'une pièce à travailler à une vitesse de sortie dans le sens de transport au moyen du dispositif de transport ;
    - l'orientation de la pièce à travailler par contact d'un bord, en particulier d'un bord avant ou arrière dans le sens de transport, de la pièce à travailler avec le système d'orientation de sorte que la pièce à travailler entre en contact avec le système d'orientation par le dispositif de transport et soit alors orientée ;
    - la libération de la pièce à travailler du système d'orientation, en particulier par le déplacement du système d'orientation hors du plan du transport dans le sens vertical vers le bas.
  2. Procédé selon la revendication 1, comprenant de plus l'étape suivante :
    - après la libération de la pièce à travailler du système d'orientation, la modification de la vitesse de la pièce à travailler à une seconde vitesse (v2) dans une section de compensation, en particulier pour la correction d'un temps de changement de lot et/ou pour l'ajustement de la distance entre les pièces.
  3. Procédé selon la revendication 1, dans lequel le dispositif d'orientation comprend de plus une section de compensation (20) qui présente au moins le dispositif de transport (21, 22) pour le déplacement de la pièce à travailler (40) dans le sens de transport (50), en particulier une courroie de transport.
  4. Procédé selon l'une quelconque des revendications précédentes, pour lequel le système d'orientation présente au moins une came (12) qui peut pénétrer par un déplacement de l'élément porteur (11) dans le plan du transport.
  5. Procédé selon la revendication 4, pour lequel le système d'orientation présente au moins deux cames (12) sur l'élément porteur (11), dans lequel les cames (12) sont espacées l'une de l'autre à équidistance par rapport à la longueur entière de l'élément porteur (11).
  6. Procédé selon l'une quelconque des revendications précédentes, pour lequel la section d'orientation (10) présente une pluralité d'éléments porteurs (11) rotatifs qui sont espacés les uns des autres transversalement au sens de transport (50).
  7. Procédé selon la revendication 6, pour lequel les éléments porteurs (11) sont entraînés au moyen d'un moteur (13) commun.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'orientation présente une pluralité de dispositifs de transport (21, 22), dans lequel un dispositif de transport (21, 22) est agencé de manière contiguë à un élément porteur (11).
  9. Procédé selon la revendication 8, pour lequel les dispositifs de transport (21, 22) sont entraînés par un moteur (24) commun.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse du dispositif de transport (21, 22) est définie de sorte à être inférieure à la vitesse de l'élément porteur (11).
  11. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la vitesse du dispositif de transport (21, 22) est définie de sorte à être supérieure à la vitesse de l'élément porteur (11).
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'orientation présente un dispositif de commande pour le réglage et éventuellement la modification de la vitesse de rotation de l'au moins un élément porteur (11) et/ou pour le réglage et éventuellement la modification de la vitesse de l'au moins un dispositif de transport (21, 22).
  13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément porteur (11) rotatif est guidé par le biais de poulies de renvoi espacées dans le sens de transport, et se trouvant de préférence dans un plan horizontal, dans lequel de préférence au moins une des poulies de renvoi est entraînée.
  14. Machine-outil, en particulier machine d'usinage de chants, avec un dispositif d'orientation qui est conçu pour la mise en oeuvre d'un procédé selon l'une quelconque des revendications précédentes, et au moins une section d'usinage agencée dans le sens de transport de manière subordonnée avec un outil d'usinage, en particulier un outil d'usinage de chants tel qu'une fraise.
EP16191748.9A 2015-09-30 2016-09-30 Dispositif d'alignement pour aligner des pièces à usiner et machine d'usinage Active EP3150344B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015105148.4U DE202015105148U1 (de) 2015-09-30 2015-09-30 Ausrichtvorrichtung zum Ausrichten von Werkstücken sowie Bearbeitungsmaschine

Publications (2)

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EP3150344A1 EP3150344A1 (fr) 2017-04-05
EP3150344B1 true EP3150344B1 (fr) 2024-09-25

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EP16191748.9A Active EP3150344B1 (fr) 2015-09-30 2016-09-30 Dispositif d'alignement pour aligner des pièces à usiner et machine d'usinage

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DE (1) DE202015105148U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021122721A1 (de) 2021-09-02 2023-03-02 Homag Gmbh Fördervorrichtung mit unabhängig bewegbaren Nocken zur Zuführung und/oder Ausrichtung von Werkstücken
DE102023110002A1 (de) * 2023-04-20 2024-10-24 Homag Gmbh Ausrichteinrichtung zum Ausrichten eines Werkstücks, Druckeinrichtung sowie Verfahren zum Ausrichten eines Werkstücks

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657200A1 (fr) * 2004-11-16 2006-05-17 Windmöller & Hölscher KG Dispositif pour séparer des produits plats transportés en formation imbriquée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6189682B1 (en) * 1995-05-31 2001-02-20 David A. Hill Position control apparatus and method for controlling the movement of a block in a woodworking machine
SI20729A (sl) * 2002-02-19 2002-06-30 Pavel Ledinek Stroj za profilno obdelavo čelnih ploskev podolgovatih lesnih obdelovancev
CA2521121C (fr) * 2003-04-29 2011-06-14 Coe Newnes/Mcgehee Ulc Systeme et procede optimises pour installation de rabotage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657200A1 (fr) * 2004-11-16 2006-05-17 Windmöller & Hölscher KG Dispositif pour séparer des produits plats transportés en formation imbriquée

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EP3150344A1 (fr) 2017-04-05
DE202015105148U1 (de) 2017-01-02

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