EP3150344A1 - Ausrichtvorrichtung zum ausrichten von werkstücken sowie bearbeitungsmaschine - Google Patents

Ausrichtvorrichtung zum ausrichten von werkstücken sowie bearbeitungsmaschine Download PDF

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Publication number
EP3150344A1
EP3150344A1 EP16191748.9A EP16191748A EP3150344A1 EP 3150344 A1 EP3150344 A1 EP 3150344A1 EP 16191748 A EP16191748 A EP 16191748A EP 3150344 A1 EP3150344 A1 EP 3150344A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
alignment device
alignment
transport direction
speed
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.)
Pending
Application number
EP16191748.9A
Other languages
German (de)
English (en)
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
Original Assignee
Homag GmbH
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 Homag GmbH filed Critical Homag GmbH
Publication of EP3150344A1 publication Critical patent/EP3150344A1/fr
Pending legal-status Critical Current

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Classifications

    • 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 an alignment device for aligning particular plate-shaped workpieces, which are preferably at least partially made of wood, wood materials, plastic or the like, and a processing machine with said alignment device.
  • the workpieces to be machined in the present application are components such as chipboard, MDF boards, or the like, which are used in the furniture and component industry. Furthermore, the invention relates to a method.
  • Aligning devices of the type mentioned find, for example, when supplying particular plate-shaped workpieces to machine tools use.
  • the known embodiments of alignment devices use when aligning the workpiece, for example, transport roller systems. When using these systems, it comes due to the inertia in large loading or Decelerations of the workpiece often cause slippage between the transport system and the workpiece. This results in deviations with respect to the time interval from component to component and the part distance between two successive workpieces (usually recorded as the distance between the trailing edge of a leading workpiece to the leading edge of a trailing workpiece). These deviations from required target values inevitably lead to a reduction in the output of the downstream processing machine.
  • a transversely to the transport direction alignment alignment is used.
  • Such a device is based on the workpiece being brought to a standstill during the moving / feeding and immediately in front of the processing machine on the alignment ruler in order to be angled.
  • the alignment ruler clears the path of the workpiece by moving it out of the plane of transport.
  • the plane of transport designates the plane in which the workpieces are moved. The fact that the workpiece is slowed down during the moving / feeding and must be subsequently accelerated again, resulting in unpredictable temporal losses that can not be compensated before feeding into the machine.
  • the work pieces conveyed by the alignment device can be components such as floor panels, doors, table tops, furniture fronts, kitchen countertops or the like.
  • Such, preferably plate-shaped, workpieces can be fed to a processing machine in order to machine them, for example by machining.
  • an alignment device which can be used, for example, as a feed device, 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 for example, to the processing machine or a further transport path or from the alignment section into a compensating section explained in more detail below is referred to as the transport direction.
  • the alignment section has at least one alignment device for aligning with the conveyor Workpieces on a transverse to the transport direction workpiece edge.
  • the at least one alignment device is arranged on a peripheral carrier element, so that it is movable in sections in the transport direction.
  • the circulating carrier element can be guided over deflecting rollers spaced in the transport direction. At least one of the pulleys 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 chosen such that it is smaller than the starting speed v 0 of the workpieces.
  • a leading edge of a workpiece moving with the conveyor would come into contact with the aligning means, which in a concrete example is formed by a cam, and be aligned due to the speed difference.
  • the first speed v 1 speed of the alignment device
  • the output speed v 0 the output speed
  • the movable alignment eliminates the need to stop the workpiece for alignment and then release and accelerate, so that the loss of time is controlled by the alignment and regulated.
  • a compensation section for changing the speed of the workpiece is provided according to a preferred embodiment after the alignment section on the side facing the processing machine and comprises at least one conveyor, in particular a conveyor belt.
  • the target speed of the workpiece imparted to the workpiece in the compensation section is a second speed v 2 , which can usually be set higher to a first speed v 1 .
  • the adjustment of the speed of the aligned workpiece allows a correction of the time interval between workpieces or an adjustment of the part spacing and contributes to the exact adherence to a predetermined / pre-calculated time interval and therefore to an increase in performance of the processing machine.
  • the conveyor device extends in sections adjacent to the circulating carrier element, wherein an end section of the conveyor device is located in the transport direction beyond an end section of the circulating carrier element.
  • a compensation section may be formed directly after the alignment section.
  • the movable alignment device may be formed according to a preferred embodiment by at least one cam, which projects into the plane of transport.
  • the plane of transport designates the plane in which the workpieces are moved.
  • the cam is arranged on the in the transport direction at the first speed v 1 encircling support member. The alignment takes place through the contact of the Transport direction of the first edge of the workpiece with the movable cam instead.
  • the carrier element is provided with two or more cams for aligning the workpiece. After the carrier element has a plurality of cams, a receiving position for the subsequent workpiece with a further cam can be taken faster and / or the alignment can be performed more accurately by a larger guide length between the plurality of cams compared to a carrier element with a cam.
  • the cams on the carrier element so that they are equidistant from each other in relation to the total length of the carrier element.
  • a plurality of bands circulating in the transport direction are provided in the alignment section, which are spaced apart from each other transversely to the transport direction.
  • the bands are preferably driven synchronously with each other, so that together form the alignment of the workpiece by the cams on the juxtaposed bands.
  • the guide length for alignment can be increased to improve the accuracy of the alignment process. For example, it is possible to align workpieces with high accuracy, the transverse direction (transverse to the conveying direction) having a relatively large width.
  • the alignment device has a control device for setting and changing the rotational speed of the carrier element, which corresponds to the first speed, and possibly the second speed.
  • a distinction can be made, for example, between a positive and a negative correction.
  • the first case of a positive correction is performed when the current lot change time is greater than the requested lot change time. That is, 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 lot change time corresponds to the required lot change time, then the need for a further positive or negative correction is eliminated.
  • the invention also includes a processing machine, in particular an edge processing machine with an alignment device, which may have both the preceding features and the said advantages, wherein the processing machine provides a subordinate arranged processing section with a processing tool, in particular a milling cutter.
  • the alignment device may be coupled to a transport device, by means of which workpieces are moved.
  • the alignment device can in In this case, be used for aligning and possibly buffering workpieces.
  • a transport device may be provided a packaging unit for packaging the workpieces, a stacking device for stacking the workpieces or the like.
  • the alignment device can be moved counter to the transport direction and delivered upwards by a movement in the vertical direction, in order to engage a workpiece.
  • Fig. 1 11 shows a perspective view of an exemplary embodiment of an alignment device having an alignment section 10 and a compensation section 20.
  • the alignment device is used as a feed device for conveying and aligning workpieces in an edge processing machine.
  • the alignment device comprises several in a transport direction 50 (in Fig. 1 through an arrow illustrated) extending conveyors 21, 22 for conveying plate-shaped workpieces.
  • the conveyors 21, 22 (here: conveyor belt) are driven by a common motor 24.
  • the extending direction of the conveyors 21 and the conveyors 22 in the transporting direction 50 is different.
  • the conveyors 21, 22 may also have the same extent in the transport direction.
  • the alignment section 10 in the present embodiment, seven belts 11 (support members) are shown, which are spaced apart from each other transversely to the transport direction 50. However, the number of bands may differ from the stated number.
  • the bands 11 are driven by a common motor 13.
  • Each of the belts 11 has two cams 12 (aligning means) fixed at equal intervals on the belt 11.
  • the dashed line in FIG. 1 which results from the mental connection of the transversely adjacent cams, represents the entirety of the movable cams with a certain guide length.
  • the conveyors 21, 22 (conveyor belt) are arranged, but not the belts 11 with the cam 12.
  • An upstream transport and a downstream processing machine are not shown.
  • FIG. 2 A side view of the alignment device is in Fig. 2 displayed.
  • the workpiece becomes 40 introduced into the alignment section 10 by the upstream transport (not shown) with the initial speed v 0 .
  • the output speed v 0 corresponds to the rotational speed of the conveyors 21, 22.
  • the belt 11 and thus also the vertically upwardly pointing cam 12 are moved at a first speed v 1 in the transport direction 50.
  • the illustrated position of the cam 12 protruding into the plane of transport is referred to as a pickup position.
  • the output 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 against the cams 12 by the upstream transport and the conveyor belts 21, 22. which is moved at the first speed v 1 .
  • the workpiece 40 is aligned in the alignment section 10 on the at least one cam 12.
  • the alignment takes place over a certain distance within the alignment section 10, as long as the cam 12 protrudes into the plane of the transport 50 and / or the first speed v 1 is smaller than the initial speed v 0 or smaller than the second speed v 2 .
  • the alignment is in the illustrated embodiment about 450 mm.
  • the first speed v 1 of the belt 11 is increased so far that the Cam 12 detached from the first edge 41 of the workpiece 40 in the transport direction 50 and removed. As a result, the workpiece 40 is released.
  • the belt 11 is braked.
  • the neutral position is characterized in that both cams 12 arranged on the belt 11 are located in a plane parallel to the plane of the transport 50.
  • the speed of the belt 11 or the belts 11 can be lowered in a neutral position to 0 m / s.
  • the workpiece 40 is further conveyed 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 such that the required starting 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 conveyors 21, 22 are not accelerated or decelerated by the cams after release of the workpiece 40.
  • the second speed v 2 (speed within the compensation section 20) to be different from the speed v 0 , and the workpiece to be slowed or accelerated once released from the cams 12.
  • the belt 11 is moved so that the cam 12 is brought into the receiving position, the position of Fig. 2 equivalent.
  • the certain area of the aligning section 10 preferably the first 120 mm of the aligning path is dropped.
  • a maximum distance of 400 mm is available.
  • a second speed v 2 of at most 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 chosen to be greater than the starting speed v 0 of the workpiece. This variant is used when the cams 12 engage a trailing edge 42 of the workpiece 40 and thereby aligning 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)
EP16191748.9A 2015-09-30 2016-09-30 Ausrichtvorrichtung zum ausrichten von werkstücken sowie bearbeitungsmaschine Pending EP3150344A1 (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 (1)

Publication Number Publication Date
EP3150344A1 true EP3150344A1 (fr) 2017-04-05

Family

ID=57199880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16191748.9A Pending EP3150344A1 (fr) 2015-09-30 2016-09-30 Ausrichtvorrichtung zum ausrichten von werkstücken sowie bearbeitungsmaschine

Country Status (2)

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EP (1) EP3150344A1 (fr)
DE (1) DE202015105148U1 (fr)

Families Citing this family (1)

* 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

Citations (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
EP1336459A2 (fr) * 2002-02-19 2003-08-20 Pavel Dipl.-Ing. Ledinek Dispositif pour l'usinage de profils sur les deux extrémités d'un produit long en bois
WO2005113206A1 (fr) * 2003-04-29 2005-12-01 Coe Newnes/Mcgehee Ulc Systeme et procede optimises pour installation de rabotage

Patent Citations (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
EP1336459A2 (fr) * 2002-02-19 2003-08-20 Pavel Dipl.-Ing. Ledinek Dispositif pour l'usinage de profils sur les deux extrémités d'un produit long en bois
WO2005113206A1 (fr) * 2003-04-29 2005-12-01 Coe Newnes/Mcgehee Ulc Systeme et procede optimises pour installation de rabotage

Also Published As

Publication number Publication date
DE202015105148U1 (de) 2017-01-02

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