EP2527105A1 - Procédé de commande d'un dispositif de sciage et dispositif de sciage correspondant - Google Patents

Procédé de commande d'un dispositif de sciage et dispositif de sciage correspondant Download PDF

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Publication number
EP2527105A1
EP2527105A1 EP12003825A EP12003825A EP2527105A1 EP 2527105 A1 EP2527105 A1 EP 2527105A1 EP 12003825 A EP12003825 A EP 12003825A EP 12003825 A EP12003825 A EP 12003825A EP 2527105 A1 EP2527105 A1 EP 2527105A1
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EP
European Patent Office
Prior art keywords
workpiece
sawing
sectional image
saw
data 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.)
Withdrawn
Application number
EP12003825A
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German (de)
English (en)
Inventor
Paul Wassmer
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Individual
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Individual
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Publication date
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Publication of EP2527105A1 publication Critical patent/EP2527105A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature

Definitions

  • the invention relates to a method for controlling a sawing device for performing saw cuts in the longitudinal direction of a workpiece, wherein a workpiece to be processed is inserted into a movable along a sawing block carriage of the sawing device and a saw unit of the sawing device is driven to process the workpiece.
  • the invention further relates to a sawing device for passing saw cuts in the longitudinal direction of a workpiece, in particular a block band saw, with a movable along a sawing block carriage and a data processing unit.
  • Such sawing devices and such methods for controlling them are known, for example, in block band saws.
  • a block clamp is known in which a tree trunk is held at the end faces with disc-shaped holding elements.
  • the invention has for its object to improve the performance characteristics of a sawing device.
  • a contour of an end face of the workpiece inserted in the block carriage is measured by a measuring device, that measurement data of the measured contour are transmitted by the measuring device to a data processing unit, that at least one sectional image matching the measured contour is determined in the data processing unit and is selected and that the selected cross-sectional image is used to drive the saw unit in the processing of the workpiece.
  • a sectional image a collection of data for the characterization of cuts to be performed with the sawing device on the workpiece understood. By the sectional image is therefore given and described how the workpiece to be processed with the sawing device to be sawn into parts.
  • the saw cuts to be executed according to a sectional image are arranged parallel to each other at least in pairs, the result is a rectangular cross-sectional shape for the finished parts.
  • contour of an end face is understood to mean those lines in a two-dimensional image of the end face, which describe the boundary of the workpiece with respect to its surroundings.
  • a suitable sectional image is understood to mean a sectional image for which the manufactured parts are the material and / or exploit a structure of the workpiece as well as possible and for which thus as little waste as possible arises during the sawing process.
  • the user automatically and computer-a proposal receives how a workpiece to be processed can be divided with the sawing device low.
  • the dependence of the result of work on the individual case experience of the user can be at least partially reduced, whereby the performance characteristics of a sawing device are improved.
  • the invention therefore comes with a measuring device for two-dimensional measurement of an end face of the workpiece, which means considerably less effort than the three-dimensional measurement of the workpiece.
  • the workpiece may be made of wood.
  • a frequent application of the sawing device provides that the workpieces tree trunks, round logs or models, ie on opposite sides to form parallel, flat surfaces pruned tree trunks are.
  • the contour can be given by the forest edge, so the remaining outside of a tree or its line in a two-dimensional transverse or radial section.
  • the sawing device can be designed as a block band saw.
  • the saw unit is designed as a band saw.
  • the at least one determined sectional image is displayed for selection with the measured contour.
  • This can be achieved, for example, by displaying the at least one determined sectional image with the measured contour on a screen of the data processing unit, for example by imaging the sectional image or essential parts thereof in the contour.
  • the advantage here is that the user can see the position of the saw cuts in the workpiece to be processed in a simple way by the relative arrangement of the sectional image and the contour in the display.
  • the at least one determined sectional image is displayed for selection on the measured contour. This can be done for example by projection of the sectional image on the front side of the workpiece.
  • a flexible response to different cross sections and dimensions of workpieces arriving in sequence for processing can be achieved when in the data processing unit a plurality of sectional images suitable for the measured contour are determined, and if a sectional image for controlling the sawing unit is selected from the determined sectional images. It is advantageous in this case that the user can refine a preselection automatically made by the data processing unit in a computer-assisted manner in that, on the basis of his experience, he can select a particularly suitable cross-sectional image under the determined sectional images and use it to control the sawing unit. The user can also take into account the spatial shape of the workpiece in this way, which does not result from the measurement result of the measuring device.
  • a piece list entered into the data processing unit is processed to determine the at least one sectional image.
  • the bill of material may also contain information on a prioritization that indicates which parts to be produced are to be completely in the workpiece and which parts to be produced can only be manufactured incompletely due to the material limits of the workpiece.
  • a reference cut is distinguished in the selectable sectional images and that the workpiece is aligned with respect to the reference cut before the saw cuts of the cut image are executed.
  • This alignment can be done manually, for example.
  • a reference plane can be predetermined and defined by the reference section on the workpiece, to which the remaining saw cuts of the sectional image or at least a part thereof for an automated processing of the sectional image can be obtained. As a result, the total time required for the processing of the workpiece is further reduced because the user further previously required operating steps can be removed.
  • the position of the reference cut is kept fixed on the end face. This can be achieved, for example, in that the workpiece is pivoted about an axis which is given by the position of the reference cut on the front side of the workpiece.
  • the advantage here is that the cross-sectional image during the alignment of the workpiece as little as possible or can not move on the front side unintentionally.
  • the workpiece is a roundwood or a model or a tree trunk.
  • the pigtail or Schopf discoverede end face refers to the end face at the tapered end of the workpiece.
  • the pigtail or Schopf broughte end face refers to the end face at the tapered end of the workpiece.
  • the contour of the pigtail or cuff-side end face often draws a prism with the cover surface parallel to the base surface and with this congruent cover surface, which is completely in the workpiece lies.
  • the end face of the workpiece facing the saw unit is measured.
  • the advantage here is that the user can move to align the remote from the saw unit end of the workpiece so, pivot or even turn that a desired position of the saw cuts to be performed in the workpiece is reached.
  • a saw device of the type mentioned above for measuring a contour of an end face of a workpiece inserted into the block carriage, such that the data processing unit sets up and selects at least one cutting pattern that matches the measured contour is and that a sawing unit of the sawing device can be controlled by means of the selected sectional image.
  • the advantage here is that a variety of hitherto manually performed operations on the sawing device can be automated with the invention. This can be used to achieve shorter production times and to achieve a better utilization of the workpieces, whereby the performance characteristics of the sawing device can be improved.
  • the measuring device preferably supplies data which describe the course or the position of the contour on the end face in two dimensions.
  • the measuring device may have a camera, which is connected to corresponding image processing means for extracting the contour.
  • the measuring device is designed as a line scanner.
  • the line scanner projects a sequence or arrangement of preferably straight lines on the front side, so that the respective projected lines are delimited by the contour to be measured in their longitudinal extent.
  • the position and / or shape and / or dimension of the contour can be measured.
  • the invention achieves in a simple manner that the determined sectional images can be aligned to the end face of the workpiece and that the alignment of the No longer need to change the workpiece in relation to the saw unit after the measurement.
  • the measuring device is arranged movable in a travel path of the block carriage and out of this.
  • the data processing unit is connected to a screen with which the measured contour and the at least one determined sectional image can be displayed for selection.
  • the advantage here is that a user can be displayed in a simple manner, whether the determined cross-sectional image actually matches the measured contour of the workpiece, or whether possibly another determined cross-sectional image should be selected, because this better fits the measured contour.
  • a number of sectional images for determining a suitable cross-sectional image are stored and kept available in the data processing unit.
  • the advantage here is that the automated process in the determination of a suitable cross-sectional image can be further simplified by checked for the deposited cross-sectional images sequentially computer-aided, whether the sectional image fits the contour or not.
  • a marking means is formed with which the course of a reference section of the selected sectional image in the direction of sawing can be marked on the workpiece.
  • this marking means may be formed as a marking laser, with which a light line can be projected onto the workpiece, which characterizes the currently set course of a saw cut on the workpiece.
  • alignment means for aligning the workpiece are formed transversely to the sawing direction on the log carriage.
  • these alignment means may be given as at least one clamping console, in particular a plurality of clamping brackets spaced from each other along the inserted workpiece.
  • the alignment means are set up by a mechanical and / or electronic coupling in such a way that an orientation and / or position of the end face or at least of the reference cut located on the end face is automatically maintained during the alignment of the workpiece.
  • the advantage here is that a re-measurement of the contour after an alignment is not required.
  • an alignment means for rotating the inserted into the block carriage workpiece is formed about an axis parallel to the sawing axis on the block carriage.
  • the advantage here is that the user has a way at hand to achieve the best possible utilization even for unusually curved workpieces.
  • a sawing device denoted as a whole by 1, is set up to carry out saw cuts in the longitudinal direction of a workpiece 2.
  • the sawing device 1 on a block carriage 3, which guided on rails 4 and along a sawing direction, which is predetermined by the position of the saw cut 5, along a travel path 6 is movable.
  • the sawing device 1 further has a sawing unit 7, with which the saw cut 5 can be performed on the workpiece 2, by passing the workpiece 2 on the block carriage 3 along the travel path 6 on the saw unit 7.
  • the saw unit 7 is designed as a band saw, and the sawing device 1 is a block band saw.
  • the saw unit 7 may also be designed as a circular saw.
  • a measuring device 10 is provided, which can be moved in the travel path 6 of the block carriage 3 along the travel path 11, that is transversely to the travel path 6.
  • the measuring device 10 can be arranged on a carriage which is not shown, which can be moved along the travel path 11.
  • the measuring device 10 is designed as a line scanner which projects measuring beams 12 onto the workpiece 2, while the measuring device 10 is moved along the travel path 11.
  • Data on the position, size, shape of the contour 8 are determined from the reflected measurement beams 12, which data are transmitted to a data processing unit 14 via a measurement data line 13.
  • Fig. 2 is the measured contour 8 shown for ease of illustration as a circular line.
  • the measured contour will deviate from the circular shape.
  • the contour may have an oval basic shape and / or there may be an irregular course of the contour 8, as is typical for the forest edge of a tree trunk in the sectional view, for example.
  • the contour 8 may even be made up of a plurality of individually closed lines that lie in one another.
  • a number of possible sectional images 15 are deposited or defined, which can be performed with the saw unit 7 on the workpiece 2.
  • the sectional view 15 defines in this way saw cuts 16, through which the parts to be manufactured 17, 18 from each other and from the workpiece 2 can be separated.
  • the saw cuts 16 in the cross-sectional view 15 are oriented at right angles or parallel to one another in such a way that the parts 17, 18 are manufactured with a rectangular cross section, as long as this allows the dimension of the material of the workpiece 2.
  • sectional image 15 shown is only an example.
  • Other sectional images 15 may also define non-parallel, for example star-shaped, saw cuts. This can be the case, for example, if boards are to be sawed in such a way that the annual rings in the workpiece run transversely to the boards.
  • the data processing unit 14 now checks computer-assisted automatically which of the stored or defined sectional images 15 matches the contour 8.
  • the sectional image fits 15 to the contour when at least a predetermined subset of parts to be manufactured 18 completely in the material of the workpiece 2 and if the remaining parts 17, the remaining material of the workpiece 2 exploit such that the chip waste 19 the smallest possible proportion form the total material of the workpiece 2.
  • the amount of the determined sectional images 15 is additionally limited by the fact that in the sawing processing belonging to a sectional image 15, only those parts 17, 18 are to be manufactured which are contained in a user-specified parts list.
  • the data processing unit 14 evaluates the parts list to determine only those sectional images 15, which meet this criterion.
  • the determined cross-sectional image 15 is displayed on a screen 20 together with the contour 8 such that the user can perceive and assess the position of the cross-sectional image 15 on the workpiece 2.
  • the workpiece 2 In order to change the position of the saw cuts, which are predetermined by the sectional image 15, in the workpiece, the workpiece 2 must be realigned with respect to the saw unit 7.
  • alignment means 21 in the form of clamping brackets are formed and arranged on the block carriage 3 in the longitudinal direction at a distance from one another.
  • the alignment means 21 can be adjusted along adjustment paths 22 and engage the inserted workpiece 2 in such a way that, during the adjustment process, the workpiece 2 is newly aligned on the block carriage 3 and with respect to the saw unit 7.
  • the operator finds that a determined cross-sectional image 15 is particularly suitable and that the workpiece 2 is well aligned, then he selects the cross-sectional image 15 so that the data of this cross-sectional image 15 are transmitted to the saw unit 7 via a control line 23.
  • the control of the saw unit 7 according to the sectional image can then be carried out by the data processing unit 14 or by a not further shown control unit on the saw unit 7.
  • the selected sectional image 15 can thus be used for the direct control of the saw unit 7 by the data processing unit 14 or for the installation of the saw unit 7 by depositing the data of the sectional image are used in a control unit of the saw unit 7.
  • a marking means 24 is provided which marks the course of the saw cut 5 on the workpiece 2 in the currently set orientation on the block carriage 3 ,
  • this marking is carried out with a laser beam 25, which is projected onto the workpiece 2.
  • a reference slice 26 which should be executed as the first slice 5 to start the sawing process, is distinguished.
  • the operator therefore aligns the workpiece 2 with the alignment means 21 on the block carriage 3 in such a way that this reference section 26 lies as low as possible in the workpiece 2 as a (first) saw cut 5 before starting the sawing process.
  • the remaining saw cuts 16, or at least a part thereof, can be processed automatically by the sawing device 1 following the reference cut 26 by relating the position of the respective saw cut 16 to the reference cut 26 initially performed.
  • the data processing unit 14 is further connected to an input means 27, such as a keyboard, a mouse or other input means, with which a user can switch between the determined and displayed on the screen 20 sectional images 15 to the appropriate sectional image 15 for driving the sawing device 1 select.
  • an input means 27 such as a keyboard, a mouse or other input means, with which a user can switch between the determined and displayed on the screen 20 sectional images 15 to the appropriate sectional image 15 for driving the sawing device 1 select.
  • Fig. 1 It can be seen that the workpiece 2, which is to symbolize a tree trunk, is tapered towards one end, for which reason the end face 9 has a smaller surface than the end face 28 at the opposite end of the workpiece 2.
  • the end face 9 is therefore the pigtail or Schopf pune front page in a tree trunk, while the end face 28 forms the stock or root-side end face of the workpiece 2.
  • the workpiece 2 is thus introduced during the sawing with its tapered end ahead in the saw unit 7.
  • the measuring device 10 is arranged to be movable so that the contour 8 of the end closer to the saw unit 7 front side 9 can be measured before the entrance of the block carriage 3 in the saw unit 7 and is measured.
  • the marking means 24 is arranged on the rear side of the workpiece 2 with respect to the sawing direction, in particular so as not to impair the projection of the laser beam 25 by the saw unit 7.
  • the alignment means 21 can also be controlled with the data processing unit 14 such that the workpiece 2 can be rotated about an axis which is parallel to the predetermined by the saw cut 5 levels ,
  • the laser beam 25 extends along the largest possible extension length on the workpiece 2 and thus the workpiece 2 is well utilized.
  • a measuring device 10 for measuring a contour 8 of an end page. 9 of the workpiece 2 in its position in the block carriage 3 to connect to a data processing unit 14 and form the data processing unit 14 for computer-aided determination of a matching sectional image 15 to the contour 8 and for driving or setting of the sawing device 1 and set up.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP12003825A 2011-05-24 2012-05-15 Procédé de commande d'un dispositif de sciage et dispositif de sciage correspondant Withdrawn EP2527105A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011102997.8A DE102011102997B4 (de) 2011-05-24 2011-05-24 Verfahren zur Ansteuerung einer Sägevorrichtung und korrespondierende Sägevorrichtung

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EP2527105A1 true EP2527105A1 (fr) 2012-11-28

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EP (1) EP2527105A1 (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3036057A1 (fr) * 2015-05-11 2016-11-18 Michel Loyet Chariot mobile d’une installation de debitage pour un positionnement optimise de la grume
PL423920A1 (pl) * 2017-12-15 2019-06-17 Mardom Pro Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa Sposób produkcji elementów z drewna litego, w szczególności do budowy mebli

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560808A1 (fr) 1984-03-06 1985-09-13 Mecanique Engrenage Modernes Procede d'optimisation du rendement en bois dans le sciage en long des grumes, et d'installation de sciage mettant en oeuvre ce procede
EP0406219A1 (fr) * 1989-06-26 1991-01-02 Hans Payr Dispositif pour découper des pièces, en particulier des pièces en bois
FR2663256A1 (fr) 1990-06-13 1991-12-20 Lycee Tech Bois Procede et installation de debitage automatique optimise des grumes.
DE4101886A1 (de) * 1991-01-23 1992-07-30 Haberecht Guenter Dr Sc Tech Verfahren und einrichtung zur verarbeitung von stueckigen holzabfaellen
US5135037A (en) 1991-03-12 1992-08-04 Ralph Wijesinghe End-dogging log carriage
FR2935923A1 (fr) * 2008-09-16 2010-03-19 Optimique Procede et dispositif d'optimisation de debit de merrains.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6895844B2 (en) * 2002-10-10 2005-05-24 Cemar Electro Inc. Laser-based calibrating method and apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560808A1 (fr) 1984-03-06 1985-09-13 Mecanique Engrenage Modernes Procede d'optimisation du rendement en bois dans le sciage en long des grumes, et d'installation de sciage mettant en oeuvre ce procede
EP0406219A1 (fr) * 1989-06-26 1991-01-02 Hans Payr Dispositif pour découper des pièces, en particulier des pièces en bois
FR2663256A1 (fr) 1990-06-13 1991-12-20 Lycee Tech Bois Procede et installation de debitage automatique optimise des grumes.
DE4101886A1 (de) * 1991-01-23 1992-07-30 Haberecht Guenter Dr Sc Tech Verfahren und einrichtung zur verarbeitung von stueckigen holzabfaellen
US5135037A (en) 1991-03-12 1992-08-04 Ralph Wijesinghe End-dogging log carriage
FR2935923A1 (fr) * 2008-09-16 2010-03-19 Optimique Procede et dispositif d'optimisation de debit de merrains.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3036057A1 (fr) * 2015-05-11 2016-11-18 Michel Loyet Chariot mobile d’une installation de debitage pour un positionnement optimise de la grume
PL423920A1 (pl) * 2017-12-15 2019-06-17 Mardom Pro Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa Sposób produkcji elementów z drewna litego, w szczególności do budowy mebli

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DE102011102997B4 (de) 2016-07-14
DE102011102997A1 (de) 2012-11-29

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