EP3259103B1 - Verfahren und vorrichtung zur herstellung von holzlamellen - Google Patents

Verfahren und vorrichtung zur herstellung von holzlamellen Download PDF

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Publication number
EP3259103B1
EP3259103B1 EP16751994.1A EP16751994A EP3259103B1 EP 3259103 B1 EP3259103 B1 EP 3259103B1 EP 16751994 A EP16751994 A EP 16751994A EP 3259103 B1 EP3259103 B1 EP 3259103B1
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EP
European Patent Office
Prior art keywords
log
groove
cutting
face
radial
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EP16751994.1A
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English (en)
French (fr)
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EP3259103A1 (de
EP3259103A4 (de
Inventor
Markus HIRMKE
Andreas Rainer
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Stora Enso Oyj
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Stora Enso Oyj
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Priority to PL16751994T priority Critical patent/PL3259103T3/pl
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Publication of EP3259103A4 publication Critical patent/EP3259103A4/de
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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
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • B27M3/0053—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally using glue
    • 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
    • B27B1/005—Methods for subdividing trunks or logs essentially involving sawing including the step of dividing the log into sector-shaped segments
    • 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
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/02—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only
    • B27B5/06—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor characterised by a special purpose only for dividing plates in parts of determined size, e.g. panels
    • B27B5/063—Sawing travelling workpieces
    • 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
    • B27B7/00—Sawing machines working with circular saw blades, specially designed for length sawing of trunks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F1/00—Dovetailed work; Tenons; Making tongues or grooves; Groove- and- tongue jointed work; Finger- joints
    • B27F1/02—Making tongues or grooves, of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/007—Combined with manufacturing a workpiece
    • 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
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • 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
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/122—Laminated

Definitions

  • the present disclosure relates to a method and a device for cutting a log into pieces which may be joined to form a structural member, which may be used as a beam, a joist, a stud, a pillar, a panel, a board, a wall element or the like.
  • glue-laminated beams in Europe are mostly produced according to DIN 1052:2008 (German standard) or DIN EN 14080: 2013-09 (harmonized European standard).
  • the beams are built up with visually graded or machine graded boards, which are produced and kiln-dried in sawmills in the traditional way.
  • the gluelam producer takes these boards as raw material, grades them and produces the required lamellae by cutting out defects (e.g. knots) and finger-jointing the pieces together. After the finger-jointed lamellae have been planed, glue is applied and the beam is formed by gluing the lamellae together.
  • the final steps may comprise planing the beam, removing optical defects, packaging and loading it.
  • EP1277552A2 discloses a similar method of forming a wood beam by cutting a round piece of timber into a plurality of strips having a trapezoidal cross section and laminating together the pieces thus formed into a beam.
  • US4122878 discloses a method of converting balsa wood of relatively small diameter into panels.
  • US2005034786 discloses a radial sawing method for sawing raw logs.
  • Such a structural member may comprise a plurality of glued-together wood lamellae, each having a lamella cross section which is parallel with a cross section of the structural member and a longitudinal direction which is parallel with a longitudinal direction of the structural member and with a principal grain direction of the wood lamellae.
  • Such lamellae may be formed as radial sections of a log and present cross sections which are triangular or trapezoidal and present a respective base surface that is formed at a radially outer part of the log.
  • the lamellae are arranged as at least one layer in which base surfaces of a pair of immediately adjacent lamellae face opposite directions.
  • Fig. 1a schematically illustrates the simplest form of beam or joist that can be formed with a single layer of lamellae 20a, 20b which are laminated side by side with major base surfaces facing alternating upwardly and downwardly, respectively.
  • Fig. 1b schematically illustrates a two-layer beam or joist.
  • This beam is thus formed by two layers L1, L2 of lamellae, each of which is formed in the same manner as the single layer of Fig. 1a .
  • the layers L1, L2 may be laminated together by gluing using conventional gluing technique.
  • Fig. 1c schematically illustrates a three-layer beam or joist that is similar to that of Fig. 1b .
  • the beam is formed of three layers L1, L2, L3 of lamellae 20a, 20b.
  • Each layer may typically have a thickness of about 5-20 cm, preferably about 10-15 cm.
  • a beam may be formed of as many layers as deemed necessary. Current standard beams are available at a height of up to 1.2 m, which would translate into a beam having 6-24 layers. Most likely, a beam of that height would have 10-12 layers.
  • an improved structural member such as a beam, a joist, a stud, a pillar, a panel, a board, a wall element, or the like.
  • an improved structural member such as a beam, a joist, a stud, a pillar, a panel, a board, a wall element, or the like.
  • an improved structural member such as a beam, a joist, a stud, a pillar, a panel, a board, a wall element, or the like.
  • such method and device should be suited for large scale production.
  • such method and device should be suited to provide products with very narrow tolerances.
  • a method of producing a plurality of wood lamellae having an approximately trapezoidal cross section comprises providing a half log having a semicircular cross section, presenting a convex surface and a planar surface, cutting a groove at a central portion of the planar surface, such that the groove extends along a length direction of the log, cutting at least two radial cuts, each extending from the convex surface to the groove, such that at least three wood lamellae are formed.
  • the segments may be readily separated from each other, while the radial cutters may be sufficiently spaced from each other to avoid collision.
  • the number of cutters may be between two and fifteen preferably five or seven.
  • the method may further comprise scanning the log to determine at least one dimension of the log.
  • the scanning may take place before cutting the radial cuts and either before or after cutting the groove.
  • the entire half log may be scanned whereby an approximation of the log in the form of a half cylinder or a half truncated cone may be provided.
  • the method may further comprise using the dimension for determining at least one of an intended position and extent of the groove, and intended positions and extents of the radial cuts.
  • the cutting of the log may be optimized based on the measurement.
  • the at least two radial cuts may be separated by an angle of 60°, 45°, 36°, 30°, 22.5°, 18°, 15°, 12.9° or 11.25° about a central axis C of the log.
  • the at least two radial cuts are provided substantially simultaneously.
  • the cutting may be performed by cutters which are spaced from each other in the longitudinal direction of the log, or which are at the same longitudinal position.
  • the radial cuts may extend past a surface of the groove by less than % of a groove depth, preferably less than 1 ⁇ 2 or less than 1 ⁇ 4 of the groove depth.
  • a "groove surface” is a surface that is formed in the groove in connection with the cutting. This groove surface may have a generally concave cross section, which may be semicircular or polygonal.
  • the method may further comprise face cutting the convex surface, such that a first base surface is provided, extending between intersections of the radial cuts and the convex surface.
  • the method may further comprise following a line along the length direction that is derived based on an outer surface of the log when face cutting the convex surface.
  • the face cutting of the convex surface may be performed before cutting the radial cuts.
  • the method may further comprise face cutting the groove surface, such that a second base surface is provided, which is parallel to the first base surface.
  • the method may further comprise following the first base surface when face cutting the groove surface.
  • the second base surface may be parallel to the first base surface.
  • the first base surface may used as a guide surface.
  • the face cutting of the groove surface may be performed after cutting the radial cuts.
  • a device for producing a plurality of wood lamellae having an approximately trapezoidal cross section comprises a feed device for providing a log having a semicircular cross section, presenting a convex surface and a planar surface, a groove cutter, arranged to cut a groove at a central portion of the planar surface, such that the groove extends along a length direction of the log, at least two radial cutters, each arranged to provide a cut extending from the convex surface to the groove and longitudinally along the log, such that at least three wood lamellae are formed.
  • the device may further comprise means for scanning the log to derive at least one dimension of the log.
  • the device may further comprise a first face cutter, arranged to cut into the convex surface so as to provide a first base surface.
  • the base surface may extend substantially along the length direction of the log.
  • the first face cutter may be moveable in a radial direction of the log, such that the cutting of the first base surface may follow a line along the length direction that is derived based on an outer surface of the log.
  • the device may further comprise a second face cutter, arranged to cut into the groove surface so as to provide a second base surface.
  • This second base surface may also extend substantially along the length direction of the log.
  • the second face cutter is arranged to provide a constant distance between the first base surface and the second base surface.
  • Fig. 2 is a schematic side view of a device 10 for producing wood lamellae from a log 2.
  • the device comprises a groove cutter 11 and a set 12 of radial cutters 121a, 121b, 121c, 121d and 121e.
  • the device 10 may comprise a conveyor arrangement 100a, 100b, 100c for causing relative movement between the log and the cutters 11, 12.
  • the log may be moved relative to stationary cutters 11, 12.
  • the log 2 has typically been longitudinally cut in half prior to being introduced into the device 10. That is, the log has been cut longitudinally along a plane containing a central axis C of the log.
  • the log may have been pre-cut into an appropriate length, such as 1-10 m, preferably 1-5 m, 1-3 m or 1-2 m.
  • the log may have been wholly or partially debarked.
  • the log can be said to present a planar surface 211 and a convex surface 210.
  • the log may be conveyed with its planar surface facing downwardly and oriented horizontally.
  • Fig. 3 is a cross sectional view taken along line A-A in Fig. 2 .
  • the groove cutter 111 provides a longitudinal groove at the central portion of the log, i.e. at the pith area.
  • the groove cutter 111 may be formed as a circular, rotatable cutter having a cutting edge with a cross section that corresponds to a desired cross section of the groove 201.
  • the groove 201 formed by the groove cutter 111 presents a substantially concave surface 211' ( Fig. 7, Fig. 9 ), which may be substantially half circular, or which may be polygonal, as seen in cross section in e.g. Fig. 7 .
  • the groove cutter may be adapted to provide a groove surface 211' having a polygonal cross section, with a number of straight portions which corresponds to the number of lamellae that are to be formed.
  • one or more, preferably all, such straight portions may be substantially parallel with a respective corresponding outer surface that is to be formed in the ensuing step.
  • the groove cutter 111 may extend upwardly from a support on which the log is to be supported with its planar surface facing downwardly.
  • Fig. 4 is a cross sectional view taken along line B-B in Fig. 2 .
  • a set of radial cutters 121a, 121b, 121c, 121d, 121e The cutters may be provided as circular saw blades having a respective axis of rotation 122a, 122b, 122c, 122d, 122e, which is perpendicular to the longitudinal direction of the log 2.
  • each radial cutter 121a, 121b, 121c, 121d, 121e may define a plane, that contains a central axis C of the log.
  • Each radial cutter 121a, 121b, 121c, 121d, 121e may be individually driven, e.g. by a respective electric motor (not shown).
  • the radial cutters 121a, 121b, 121c, 121d, 121e may be arranged such that the log is divided longitudinally into a plurality of lamellae blanks 2', each having the cross sectional shape of a sector of a circle.
  • the cutters are placed such that the lamellae blanks 2' will have the same center angle a, which may be 60°, 45°, 36°, 30°, 22.5°, 18°, 15°, 12.9° or 11.25°, as desired.
  • the number of radial cutters may be 3, 4, 5, 6, 7, up to 15.
  • the radial cutters 121a, 121b, 121c, 121d, 121e extend from outside the outer convex surface 210 of the log 2 radially inwardly through the log and penetrating the groove surface 211', as can be seen in Fig. 11 .
  • the radial cutters extend inwardly past the groove surface 211' by a distance which is less than the depth of the groove 201, preferably less than % of the depth, less than 1 ⁇ 2 of the depth or less than 1 ⁇ 4 of the depth.
  • the log 2 When feeding a log 2 through the device 10, with the planar surface 211 facing downwardly, the log 2 will initially engage the groove cutter 111, whereby a groove 201 is cut at a central portion of the log 2, in the pith area.
  • a guide device (not shown) may be introduced into the groove 201 and used for guiding the log when moving through subsequent machining arrangements.
  • Such a machining arrangement may be the set 12 of radial cutters 121a, 121b, 121c, 121d, 121e shown in Figs 2 and 4 .
  • the log is divided into a plurality (here six) of lamellae blanks 2'.
  • the lamellae blanks 2' may then be machined into lamellae having trapezoidal cross section, e.g. as disclosed in US4122878 and as illustrated in Fig. 14 .
  • a drying step such as kiln drying, may be performed prior to such machining.
  • Figs 5-11 disclose another embodiment of a device 10' for producing wood lamellae having trapezoidal cross section.
  • the device 10' comprises a groove cutter 111 and a set 12 of radial cutters. Hence, these need no further description.
  • a scanning arrangement 13 which scans the log. Based on the scanning, a three dimensional model of the log may be provided, based on which the optimal way of cutting the log may be determined.
  • the three dimensional model of the log may be based on a semi cylinder or a semi truncated cone.
  • its minimum radius may be identified and the model may be fitted to its outside with the aim at cutting away as little material as possible from the bark side of the log.
  • limited areas of smaller radius may be tolerated, and optionally compensated for by a filling operation.
  • a set 14 of face cutters may comprise a plurality of face cutters 141a, 141b, 141c, 141d, 141e, 141f, which may have the form of milling drums or profiler rolls, that are rotatable about an axis which extends substantially perpendicular to the longitudinal direction of the log 2.
  • the face cutters may be positioned such that each face cutter has its effective cutting edge perpendicular to a line dividing the central angle a of the associated lamella (that is to be formed) into two.
  • the face cutters 141a, 141b, 141c, 141d, 141e, 141f may be moveable in the radial direction of the log 2.
  • the face cutting may be performed such that longitudinal edges of adjacent planar faces 210' meet on a line where the radial cuts 203a, 203b, 203c, 203d, 203e are to be made.
  • the radial cutters 121a, 121b, 121c, 121d, 121e may engage the log 2 so as to cut it into a plurality of lamellae 2', as described with reference to Figs 2-4 .
  • the groove cutter 11 is provided with the polygonal cross section and the sides of the polygon are provided to be parallel with the first base surfaces 210', it is possible to provide wood lamellae having all four faces finished.
  • the thus produced lamellae may be forwarded for further processing, such as further profiling to prepare them for producing e.g. a structure such as disclosed in Figs 1a-1c .
  • the lamellae may be subjected to a drying step, such as through kiln drying.
  • the lamellae may be stored until they are to be used.
  • the device 15 comprises a conveyor arrangement for conveying one or more lamellae. Moreover, the device comprises a guide surface 152a, 152b, 152c, 152d, 152e, 152f and a profiler 151a, 151, 151c, 151d, 151e, 151f.
  • the guide surface 152a, 152b, 152c, 152d, 152e, 152f may be adapted to interact with the surface of the lamella that was formed closest to the bark, i.e. the surface that was formed by the face cutters at section 14 in the device of Fig. 5 , or the first, or major, base surface of the trapezoid that is to be formed.
  • the profilers 151a, 151, 151c, 151d, 151e, 151f may be adjustable in the direction normal to the guide surface, i.e. in the horizontal direction in Fig. 12 . Hence, each profiler may be set to provide a lamella 20 having a fixed height as seen from the first base surface.
  • the device 15 may be arranged to process one lamella at the time, or it may process two or more lamella at the time in parallel, such as is indicated in Fig. 13 .
  • the device 15 may be arranged to process in parallel all of the lamellae 2' which were produced simultaneously during the cutting step at 12 in Fig. 2 or 5 .
  • the lamellae output from the cutting step at 12 in Fig. 2 or 5 may be laid up side by side in the same order as the lamellae had when forming part of the log.
  • the device 15 may be arranged directly after the radial cutting device 12, with the lamellae being transported by a conveyor there between.
  • a robot or an operator may handle the lamellae output from the cutting device 12 so as to position them correctly for the ensuing face cutting step at the device 15.
  • a cross section of a finished wood lamella is illustrated.
  • the lamella presents the central angle a, a first base surface 210' formed at the portion of the log which is formed of the log portion closest to the bark, a second base surface 211", which is formed of the log portion closest to the pith.
  • These two base surfaces are provided by the face cutters 141a-141f and 151a-151f, respectively.
  • Extending between the base surfaces are the leg surfaces 213a, 213b provided by the radial cutters 121a-121e.
  • the leg surfaces 213a, 213b are also planar.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)

Claims (18)

  1. Verfahren zur Herstellung einer Vielzahl von Holzlamellen mit einem annähernd trapezförmigen Querschnitt, wobei das Verfahren Folgendes umfasst:
    Bereitstellen eines Halbstamms (2) mit einem halbkreisförmigen Querschnitt, der eine konvexe Oberfläche (210) und eine planare Oberfläche (211) aufweist,
    Schneiden einer Nut (201) an einem zentralen Abschnitt der planaren Oberfläche (211) derart, dass sich die Nut entlang einer Längsrichtung (L) des Stamms (2) erstreckt, und
    Schneiden von mindestens zwei radialen Schnitten (203a, 203b, 203c, 203d, 203e), die sich jeweils radial von der konvexen Oberfläche (210) zu der Nut (201) und entlang der Längsrichtung (L) erstrecken, sodass mindestens drei Holzlamellen gebildet werden.
  2. Verfahren nach Anspruch 1, das ferner ein Abtasten des Stamms umfasst, um mindestens eine Abmessung des Stamms zu bestimmen.
  3. Verfahren nach Anspruch 2, das ferner ein Verwenden der Abmessung zum Bestimmen von mindestens einem der Folgenden umfasst:
    eine beabsichtigte Position und Ausdehnung der Nut (201), und
    beabsichtigte Positionen und Ausdehnungen der radialen Schnitte (203a, 203b, 203c, 203d, 203e).
  4. Verfahren nach einem der vorhergehenden Ansprüche, wobei die mindestens zwei radialen Schnitte (203a, 203b, 203c, 203d, 203e) durch einen Winkel von 60°, 45°, 36°, 30°, 22,5°, 18°, 15°, 12,9° oder 11,25° um eine Mittelachse (C) des Stamms getrennt sind.
  5. Verfahren nach einem der vorhergehenden Ansprüche, wobei die mindestens zwei radialen Schnitte (203a, 203b, 203c, 203d, 203e) im Wesentlichen gleichzeitig bereitgestellt werden.
  6. Verfahren nach einem der vorhergehenden Ansprüche, wobei sich die radialen Schnitte (203a, 203b, 203c, 203d, 203e) um weniger als ¾ einer maximalen Tiefe der Nut (201), vorzugsweise weniger als ½ oder weniger als ¼ der Nuttiefe, über eine Oberfläche der Nut hinaus erstrecken.
  7. Verfahren nach einem der vorhergehenden Ansprüche, das ferner ein stirnseitiges Schneiden der konvexen Oberfläche (210) derart umfasst, dass eine erste Basisoberfläche (210') bereitgestellt wird, die sich zwischen Schnittpunkten von den radialen Schnitten und der konvexen Oberfläche (210) erstreckt.
  8. Verfahren nach Anspruch 7, das ferner ein Folgen einer Linie entlang der Längsrichtung (L), die basierend auf einer Außenoberfläche des Stamms abgeleitet wird, beim stirnseitigen Schneiden der konvexen Oberfläche (210) umfasst.
  9. Verfahren nach Anspruch 7 oder 8, wobei das stirnseitige Schneiden der konvexen Oberfläche vor dem Schneiden der radialen Schnitte (203a, 203b, 203c, 203d, 203e) durchgeführt wird.
  10. Verfahren nach einem der Ansprüche 7-9, das ferner ein stirnseitiges Schneiden der Oberfläche der Nut (201) derart umfasst, dass eine zweite Basisoberfläche (211") bereitgestellt wird, die parallel zu der ersten Basisoberfläche (210') ist.
  11. Verfahren nach Anspruch 10, das ferner ein Folgen der ersten Basisoberfläche (210') beim stirnseitigen Schneiden der Nutoberfläche (211') umfasst.
  12. Verfahren nach Anspruch 10 oder 11, wobei das stirnseitige Schneiden der Nutoberfläche (211') nach dem Schneiden der radialen Schnitte (203a, 203b, 203c, 203d, 203e) durchgeführt wird.
  13. Vorrichtung zur Herstellung einer Vielzahl von Holzlamellen mit einem annähernd trapezförmigen Querschnitt, wobei die Vorrichtung Folgendes umfasst:
    eine Zuführvorrichtung (100a, 100b, 100c) zum Bereitstellen eines Stamms (2) mit einem halbkreisförmigen Querschnitt, der eine konvexe Oberfläche (210) und eine planare Oberfläche (211) aufweist,
    einen Nutenschneider (11), der so angeordnet ist, dass er eine Nut (201) an einem zentralen Abschnitt der planaren Oberfläche (211) derart schneidet, dass sich die Nut entlang einer Längsrichtung (L) des Stamms erstreckt,
    mindestens zwei Radialschneider (121a, 121b, 121c, 121d, 121e), die jeweils so angeordnet sind, dass sie einen radialen Schnitt (203a, 203b, 203c, 203d, 203e) bereitstellen, der sich von der konvexen Oberfläche (210) zu der Nut (211) und entlang der Längsrichtung (L) erstreckt, sodass mindestens drei Holzlamellen gebildet werden.
  14. Vorrichtung nach Anspruch 13, das ferner Mittel (13) zum Abtasten des Stamms (2), um mindestens eine Abmessung des Stamms (2) abzuleiten, umfasst.
  15. Vorrichtung nach Anspruch 13 oder 14, die ferner einen ersten Stirnschneider (141a, 141b, 141c, 141d, 141e, 141f) umfasst, der so angeordnet ist, dass er in die konvexe Oberfläche (210) einschneidet, um eine erste Basisoberfläche (210') bereitzustellen.
  16. Vorrichtung nach Anspruch 15, wobei der Stirnschneider (141a, 141b, 141c, 141d, 141e, 141f) in einer radialen Richtung des Stamms bewegbar ist, sodass das Schneiden der ersten Basisoberfläche einer Linie entlang der Längsrichtung (L) folgt, die basierend auf einer Außenoberfläche des Stamms (2) abgeleitet wird.
  17. Vorrichtung nach einem der Ansprüche 13-16, die ferner einen zweiten Stirnschneider (151a, 151b, 151c, 151d, 151e, 151f) umfasst, der so angeordnet ist, dass er in die Nutoberfläche (211') einschneidet, um eine zweite Basisoberfläche (211") bereitzustellen.
  18. Vorrichtung nach Anspruch 17, wobei der zweite Stirnschneider (151a, 151b, 151c, 151d, 151e, 151f) so angeordnet ist, dass er einen konstanten Abstand zwischen der ersten Basisoberfläche (210') und der zweiten Basisoberfläche (211") bereitstellt.
EP16751994.1A 2015-02-17 2016-02-08 Verfahren und vorrichtung zur herstellung von holzlamellen Active EP3259103B1 (de)

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SE1550171A SE538849C2 (en) 2015-02-17 2015-02-17 Method and device for producing wood lamellae
PCT/IB2016/050631 WO2016132246A1 (en) 2015-02-17 2016-02-08 Method and device for producing wood lamellae

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Publication number Priority date Publication date Assignee Title
US4102373A (en) * 1977-05-12 1978-07-25 Michael Edward Winiasz Semi-automatic logsplitter
US4122878A (en) 1977-12-14 1978-10-31 Baltek Corporation Technique for converting balsa logs into panels
US4301202A (en) * 1978-06-26 1981-11-17 Baltek Corporation Technique for converting balsa logs into panels
US4476663A (en) * 1983-08-15 1984-10-16 Bikales Victor W Structure with composite members
DE19613237C2 (de) 1996-04-02 1999-06-02 Kirst Ralph Dipl Ing Fh Balken und Verfahren zu dessen Herstellung
SE9800644L (sv) * 1998-03-03 1999-09-04 Lars Hammarstroem Förfarande för sönderdelning av en stock samt virkesenhet
EP1277552B1 (de) 2001-07-19 2006-05-03 Fries, Petra Verfahren und Einrichtungen zum Einschnitt und zur Profilierung von Trapezlamellen für Trapezlamellenbalken
US20050034786A1 (en) * 2003-08-12 2005-02-17 Dargan Samuel G. Radial sawing method
DE102011054165B4 (de) * 2011-10-04 2016-12-29 Simon Möhringer Anlagenbau GmbH Verfahren zur Herstellung von Keilbohlen

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PL3259103T3 (pl) 2022-04-04
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SE538849C2 (en) 2017-01-03
EP3259103A1 (de) 2017-12-27
EP3259103A4 (de) 2019-04-03

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