EP1872918B1 - Sawing of wood boards with a circular saw - Google Patents
Sawing of wood boards with a circular saw Download PDFInfo
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- EP1872918B1 EP1872918B1 EP06116385A EP06116385A EP1872918B1 EP 1872918 B1 EP1872918 B1 EP 1872918B1 EP 06116385 A EP06116385 A EP 06116385A EP 06116385 A EP06116385 A EP 06116385A EP 1872918 B1 EP1872918 B1 EP 1872918B1
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- wood
- saw
- saw blade
- sawing
- thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/02—Circular saw blades
- B23D61/025—Details of saw blade body
Definitions
- the present invention relates to a method and a saw unit for sawing slats of wood with a circular saw.
- Circular saws are common means of sawing wood. In addition to the cutting to length and cutting of slabs into specific formats, it is also important to divide a log, beam or board into a plurality of thinner boards in the axial direction of the circular saw blade, which are referred to below as "slats".
- the term "lamella” here basically refers to the wood formats resulting from the sawing process according to the invention. These need not necessarily be particularly thin, although preferred thicknesses of the fins will be discussed below. The term initially serves only to distinguish the sawed wood from the unseeded wood.
- Starting material of the sawing process according to the invention may be boards, beams or whole logs or parent parts, with already pre-sawn boards or beams with a relatively large thickness are preferred.
- the EP 0 211 423 A2 shows in cross-section conical circular saw blades with wedge effect.
- the DE 20 2006 001047 U1 shows saw blade cross-section profiles adapted to profiles of profile cutters, which thicken towards the axis.
- the EP 0 519 34.7 A1 shows wedge-shaped space-fixed separating element in connection with circular saw blades.
- the technical problem underlying the invention is to provide a new method and a new sawing unit for sawing wooden lamellas with a circular saw, which offer improved practical performance over the prior art.
- the basic idea of the invention is based on the use of a circular saw blade which exerts a wedge effect on the sawn wood and has a special shape for this purpose. Since the circular saw blade is rotationally symmetrical about the axis, this is the cross-sectional profile in the radial direction, in which therefore the axis is in the cutting plane, described. Here is in a region of the circular saw blade, which is "more central" than the saw teeth, a greater axial strength than the axial strength of the saw teeth before. The saw blade is therefore thicker in a central area than outside. This axially stronger region, when immersed in the slot cut by the saw teeth on the outer edge, exerts a force in the axial direction on the sawn wood and thus acts as a wedge.
- the axial strength of the saw teeth In contrast, should not form the "thickest point" of the cross-sectional profile of the saw blade in the invention, the axial strength of the saw teeth.
- the saw teeth can be axially stronger than the part of the saw blade which adjoins directly inside. Incidentally, the saw blade but in any case further inside stronger than the saw teeth.
- the saw teeth themselves can be designed with a relatively low axial strength, which allows quite significant reductions in cutting losses. These low sawtooth strengths are not necessarily associated with stability problems due to the better stability of the further thickened saw blade.
- the inner region of the saw blade is also assigned the function of providing the necessary stability of the overall saw blade.
- the area of the plant between the sawn wood sides and the region of the saw blade, which exerts the mentioned wedge effect applied to a liquid lubricant and coolant.
- a liquid lubricant and coolant This can be initiated during the sawing process by a hose or the like. Or be sprayed.
- this is a water-based lubricant that does not interfere with the subsequent drying process, does not affect the sawn lamellae in their quality, low cost and no Raises environmental issues.
- Has proven particularly useful here a solution of soaps, especially soft soap, in water.
- a continuous, ie without step-like jumps decrease in the thickness of the saw blade from the thicker region radially outward.
- the saw teeth themselves can be somewhat stronger than the immediately adjacent saw blade area, so that here too a discontinuous and stepwise increase or decrease in the thickness is permitted.
- this refers only to the transition to the saw teeth themselves and, as it were, to the "shadow" of the saw teeth in the radial direction, that is to discontinuous jumps that do not exceed the thickness of the saw teeth in radial projection.
- the decrease in strength runs monotonically radially from the thicker region to the outside, that is, there is no longer an increase in strength.
- it is even strictly monotone, so it is a continuous uninterrupted strength reduction in the direction radially outward.
- this again applies except for the transition to the saw teeth and not necessarily for the areas radially within the strongest area of the saw blade.
- the radial center of the saw blade is actually also the region of greatest axial strength which, as the embodiment shows, can also continue to the outside by a considerable proportion of the total radius.
- a second preferred variant provides for a "one-sided" increase in strength, that is, the wedge effect is present only on one side and the other side is preferably flat, so that not touched or insignificantly touched by the saw cut wood side. This results in an asymmetric wedge effect.
- the symmetrical saw blades are used when a central section produces two lamellae, which are bent away on both sides by the wedge effect.
- the starch gain necessary for reasons of stability and the tension generated by the wedge effect in the wood can be distributed on both sides.
- the asymmetrical "one-sided" variant is preferably used when two saw blades are provided on a common drive axle and lie outward with the side designed in each case as a wedge. Then a core area between the saw blades is left by the parallel and common cuts of the two saw blades, which could not evade at a wedge effect occurring here because of the pairing of the saw blades. The respective outer areas can be pushed away laterally.
- a total of four fins are then produced, the first two each outside the coaxial saw blades and the second two separated within the coaxial saw blades and by the symmetrical subsequent saw blade.
- more "serial stages" than one with two coaxial saw blades are possible, in which case two outer blades are separated per saw blade pair, which are separated from one of the two serially upstream saw blades left between these core area.
- a symmetrical central blade or not are possible.
- two saw blades can be used for a single sipe cut, which are therefore in a common plane, so are coplanar. These saw blades overlap slightly in the transport direction of the wood, which is why one of them lies slightly in the transport direction in front of the other, so that there is no contact of the saw teeth. This ensures that the individual saw blade does not have to correspond to the entire depth of cut and thus only has to dive into the wood by more than half the depth of cut.
- the depth of cut is thus divided into two coplanar opposite saw blades, as the embodiment illustrated in more detail. This also applies in particular to individual "sawing stations" in a "serial connection" according to the above explanations.
- the saw blade or the saw blades ie the circular saw or saw unit, a planer unit upstream.
- This plans plane at least one side surface which is perpendicular to the axial direction of the saw blades, and thus creates a defined plane for the incidentein sued the subsequent saw cuts.
- an important preferred feature of the invention is that undried wood or wood with a high residual moisture content can be cut or cut.
- essentially unsaved and undried fresh wood can be sawed into lamellae, which can be dried with much less time due to the much larger specific surface area.
- the use of fresh wood ensures that dimensional errors due to warping of the wood during a drying process prior to the sawing are avoided.
- the lower distortion also manifests itself in the fact that in the above-mentioned production of a flat reference surface by planing less waste occurs because the present (rough) sawing surface is less uneven.
- the undried wood has in connection with the invention also has the advantage that it presses slightly better by the mentioned wedge effect leaves because it reacts more elastic than already dried wood.
- the term "undried wood” is intended to refer in particular to wood having a residual moisture content of at least 15%, preferably at least 20% and particularly preferably at least 30%.
- lamellae has already been introduced as a general term for the products of the process according to the invention.
- this refers to boards having a thickness of at most 15 mm, preferably at most 13 mm and particularly preferably at most 11 mm in the axial direction of the saw blade, which applies to hardwood and softwood.
- Softwood is of special interest.
- the resulting lamellae can be used according to the invention for multi-layer building boards, such as so-called.
- Solid wood panels which are glued together from a plurality of layers of corresponding fins, but also for core areas, the top or bottom of other multi-layer building boards or a floor covering, as a wear layer same.
- Especially with more expensive types of wood is the fact that according to the invention by the lower axial strengths of the saw teeth less saw cut and for the already described reasons also lower planing losses occur, of particular interest.
- FIG. 1 shows a sectional view through an inventive asymmetrical circular saw blade.
- the cut is such that the saw blade radius and the axis of rotation lie horizontally or vertically in the plane of the drawing.
- the left-hand illustration is the right half of a section through the radial center from a first saw blade and the right-hand representation is mirror image of it from the radial center of the left half of a section through a second saw blade. Both blades are summarily denoted by 1.
- the right edge of the left saw blade 1 is at the bottom of the FIG. 1 shown enlarged.
- FIG. 3 a corresponding saw cut by a board 2, which produces two blades 2a and 2b.
- FIG. 1 So shows a sectional view containing both saw blade axes, wherein the actual transport direction of the board is rotated about the vertical in the plane of the vertical line on the plane until an actual overlap of the saw blade edges in the projection results.
- the individual saw blades 1 have an outer row of teeth 3 with an axial thickness of 1.6 mm. Radial within this row of teeth 3, the axial strength jumps back to 1 mm, the much larger part of the return, as the detail in FIG. 1 left below, on the top and the smaller part on the bottom is done. Incidentally, the underside of the saw blade is completely flat, whereas the upper side remains straight and thus at the thickness of 1 mm only for a radial region between the outermost radius of 175 mm and an inner radius of 159 mm in the cross-sectional profile.
- the thickness jumps to 1.2 mm thickness with a production-related small step of 0.2 mm and from there rises linearly, ie at a constant angle, to a final axial thickness of 5 mm, which is achieved at a radius of 90 mm. This results in a very acute angle of rise of about 3 °.
- angles in the range of 1 to 5 °, preferably 2 to 5 ° and particularly preferably 2.5 to 4 ° are advantageous.
- FIG. 2 shows one FIG. 1 corresponding representation of a symmetrical circular saw blade according to the invention.
- the dimensions are completely analogous with the only difference that the ramp-like rise in this case is distributed symmetrically on both sides of the saw blade, so in each case only half the angle occurs, so that the sum of the two angles is to be set for the mentioned preferred angle ranges here.
- FIG. 3 shows a section through a board of width 155 mm and any length (perpendicular to the plane) and a thickness of about 15 mm. This is characterized by a cut with the two saw blades 1 according to the invention FIG. 1 or off FIG. 2 a set of two slats 2a and 2b of the respective thickness of 6.7 mm (at a cutting width of 1.6 mm) emerged. Instead, with a conventional circular saw blade, the saw cut loss would be 2.5 or 2.9 mm, for example, depending on the lamella thickness, it would be considerably higher on the total wood thickness.
- Preferred lamella geometries are in the range of 4 to 10, preferably 5 to 9 mm thick and about 100 to 200 mm wide, and such lamellae may be cut from boards of, for example, 50 mm thick or more. It is readily apparent that either by using thinner starting boards or by producing one or even more than one additional blade of the same starting power, direct economic benefits can be derived from the reduced saw blade losses.
- the saw blade according to the invention has an outstanding because of the substantially continuous increase in its thickness to 5 mm Stability and pressed by the axial wedge effect the resulting slats slightly apart.
- FIG. 4 shows a perspective view of a complete sawing unit according to the invention.
- the timber transport direction runs from right (behind) to left (front).
- a planing unit not shown, for planing a defined lower reference surface of the board 2, which then rests on the transport plane of the saw unit.
- the top surface of the board is planed so far "clean" that it is glued and the total thickness of the board, taking into account the saw cuts losses the desired multiple of the desired lamella thickness.
- the very low distortion of the fresh wood compared to the prior art significantly lower planing losses realized.
- the saw unit in this example comprises six individual circular saws 4a to 4f, each with vertical drive axles.
- the drive axes of the circular saws 4b, 4d, 4f are denoted by 5b, 5d, 5f, the remaining drive axles are concealed by cover hoods, which are folded up in the circular saws 4b, 4d, 4f.
- the axes are driven by electric motors 6, of which the motors 6b, 6d, 6f associated with the circular saws 4b, 4d, 4f are shown together with a respective drive toothed belt connected at the top.
- the circular saws are each displaced transversely to the transport direction of the wood and adjustable.
- Corresponding guides are recognizable for the circular saws 4b, 4d, 4f and denoted by 7b, 7d, 7f.
- the corresponding actuators can be found below and are not specified.
- cooling fluid lines which direct an aqueous solution of greasy soap to the respective circular saw blades and run into the cutting area.
- FIG. 4 shown between the circular saws and in the transport direction of the circular saws 4a and 4b respectively guides 8, which are in the transport direction Seen substantially represent a rotated by 90 ° and with the legs pointing inward U-profile and thus can prevent breaking away from the wedge effect pushed away slats up and down.
- the asymmetrical saw blades 1 according to FIG. 1 particularly suitable for circular saws 4, each with two coaxial saw blades.
- the sloping planes in FIG. 1 are directed to the top, each lie outside, so at the top of each saw blade above and at the bottom saw blade below.
- All circular saws 4a to 4f in FIG. 4 are constructed accordingly. It is therefore a total of twelve saw blades 1.
- the circular saws rotate within a pair (ie, 4a and 4b, 4c and 4d and 4e and 4f) respectively in opposite directions, with the inner regions against the transport direction of the wood, as already the arrows in FIG. 1 hint at the axles.
- Circular saws 4 and saw blades 1 within each pair are, as also already explained, opposite and arranged slightly offset in the transport direction, so that there is an overlap.
- the two upper saw blades 1 of the circular saws 4e and 4f thus separate in a final common cut a blade from above, while the two lower saw blades cut off a blade down.
- the remaining core area between the respective saw blades is supplied to the next pair of circular saws 4c and 4d, which in turn, with a smaller axial distance of the saw blades, each separates a blade up and down.
- the remaining core is reduced by the saw pair 4a and 4b to a single blade remaining between the saw blades.
- this remaining core could be replaced by a last pair of saws, each with only one symmetrical saw blade according to FIG. 2 be separated into two slats, so that a total of a straight number of slats arises.
- the embodiment of FIG. 4 however, generates an odd number, namely seven slats.
- the slats After passing through the last pair of circular saws 4a and 4b and the guides 8 behind them, the slats are gripped in total by a roller conveyor station and further transported from the saw unit to be stacked in a conventional manner.
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Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Sägeeinheit zum Sägen von Lamellen aus Holz mit einer Kreissäge.The present invention relates to a method and a saw unit for sawing slats of wood with a circular saw.
Kreissägen sind gängige Mittel zum Sägen von Holz. Neben dem Ablängen und Zuschneiden von Platten auf bestimmte Formate ist dabei auch das Aufteilen eines Stammes, Balkens oder Brettes in eine Mehrzahl in der axialen Richtung des Kreissägeblattes dünnere Bretter wichtig, die im Folgenden als "Lamellen" bezeichnet werden.Circular saws are common means of sawing wood. In addition to the cutting to length and cutting of slabs into specific formats, it is also important to divide a log, beam or board into a plurality of thinner boards in the axial direction of the circular saw blade, which are referred to below as "slats".
Bei dem Sägen von Lamellen sind in der Praxis viele verschiedene Gesichtspunkte von Belang, u. a. Standzeiten und Stabilität der Werkzeuge, also der Kreissägeblätter, Maßhaltigkeit der Lamellen bzgl. der Stärke in der Richtung senkrecht zur Schnittebene, also der axialen Richtung, Materialverlust durch die Schnittbreite der Sägeblätter, Durchsatz der u. U. mit mehreren Kreissägen ausgestatteten Sägeeinheiten etc.When sawing lamellae, many different aspects are of importance in practice, u. a. Service life and stability of the tools, ie the circular saw blades, dimensional stability of the slats respect. The strength in the direction perpendicular to the cutting plane, ie the axial direction, material loss by the cutting width of the saw blades, throughput of u. U. equipped with several circular saw saw units etc.
Wichtige Anwendungsgebiete für solche Lamellen sind die Herstellung von Mehr schichtplatten für die Bauindustrie und Fußbodenbeläge, wobei die Erfindung nicht auf diesen Bereich eingeschränkt ist.Important areas of application for such slats are the production of multi-layer boards for the construction industry and floor coverings, the invention is not limited to this area.
Der Begriff der "Lamelle" bezieht sich hier übrigens grundsätzlich auf die durch den erfindungsgemäßen Sägevorgang entstehenden Holzformate. Diese müssen nicht notwendigerweise besonders dünn sein, wobei allerdings auf bevorzugte Materialstärken der Lamellen noch weiter unten eingegangen wird. Der Begriff dient zunächst nur dazu, das gesägte Holz von dem ungesägten Holz zu unterscheiden. Ausgangsprodukt des erfindungsgemäßen Sägeprozesses können Bretter, Balken oder auch ganze Stämme oder Stammteile sein, wobei bereits vorgesägte Bretter oder Balken mit einer relativ großen Stärke bevorzugt sind.Incidentally, the term "lamella" here basically refers to the wood formats resulting from the sawing process according to the invention. These need not necessarily be particularly thin, although preferred thicknesses of the fins will be discussed below. The term initially serves only to distinguish the sawed wood from the unseeded wood. Starting material of the sawing process according to the invention may be boards, beams or whole logs or parent parts, with already pre-sawn boards or beams with a relatively large thickness are preferred.
Die
Der Oberbegriff der Ansprüche 1 und 16 basiert auf dem erstgenannten Dokument.The preamble of
Ausgehend davon liegt der Erfindung das technische Problem zugrunde, ein neues Verfahren und eine neue Sägeeinheit zum Sägen von Lamellen aus Holz mit einer Kreissäge anzugeben, die gegenüber dem Stand der Technik eine verbesserte praktische Leistungsfähigkeit bieten.Based on this, the technical problem underlying the invention is to provide a new method and a new sawing unit for sawing wooden lamellas with a circular saw, which offer improved practical performance over the prior art.
Dieses Problem wird gelöst durch ein Verfahren gemäß Anspruch 1 zum Sägen von Lamellen aus Holz mit einer Kreissäge, die ein Kreissägeblatt aufweist, wobei das Kreissägeblatt eine geringere axiale Stärke der Sägezähne an seinem Rand als die axiale Stärke eines radial innerhalb der Sägezähne liegenden Bereichs des Sägeblatts aufweist und das Sägeblatt beim Sägen infolge dieses Stärkenunterschiedes auf das gesägte Holz als Keil wirkt, dadurch gekennzeichnet, dass dem Holz ein flüssiges Kühlmittel zugeführt wird, das das Holz während des Sägens der Lamellen kühlt und schmiert,
und eine entsprechend ausgestattete Sägeeinheit gemäß Anspruch 16 mit einer Einrichtung zum Zuführen des Kühlmittels.This problem is solved by a method according to claim 1 for sawing wood slats with a circular saw having a circular saw blade, the circular saw blade having a smaller axial strength of the saw teeth at its edge than the axial thickness of a radially inside of the saw teeth portion of the saw blade and the saw blade acts as a wedge during sawing due to this difference in thickness on the sawn wood, characterized in that a liquid coolant is supplied to the wood, which cools and lubricates the wood during sawing of the slats,
and a suitably equipped saw unit according to
Bevorzugte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben und werden neben den Grundideen der Erfindung im Folgenden erläutert. Die Beschreibung bezieht sich dabei implizit stets sowohl auf das Sägeverfahren wie auf die entsprechende Kreissäge bzw. Sägeeinheit, ohne dass zwischen den Kategorien noch explizit unterschieden wird.Preferred embodiments are specified in the dependent claims and will be explained in addition to the basic ideas of the invention below. The description implicitly always refers to both the sawing process as well as the corresponding circular saw or saw unit, without explicitly distinguishing between the categories.
Die Grundidee der Erfindung geht aus von der Verwendung eines Kreissägeblattes, das auf das gesägte Holz eine Keilwirkung ausübt und hierzu eine besondere Form aufweist. Da das Kreissägeblatt um die Achse rotationssymmetrisch ist, wird hierzu das Querschnittsprofil in radialer Richtung, bei dem also die Achse in der Schnittebene liegt, beschrieben. Hier liegt in einem Bereich des Kreissägeblattes, der "mittiger" als die Sägezähne liegt, eine größere axiale Stärke als die axiale Stärke der Sägezähne vor. Das Sägeblatt ist also in einem mittigeren Bereich dicker als außen. Dieser axial stärkere Bereich übt dann, wenn er in den von den Sägezähnen am Außenrand geschnittenen Schlitz eintaucht, eine Kraft in axialer Richtung auf das gesägte Holz aus und wirkt demzufolge als Keil.The basic idea of the invention is based on the use of a circular saw blade which exerts a wedge effect on the sawn wood and has a special shape for this purpose. Since the circular saw blade is rotationally symmetrical about the axis, this is the cross-sectional profile in the radial direction, in which therefore the axis is in the cutting plane, described. Here is in a region of the circular saw blade, which is "more central" than the saw teeth, a greater axial strength than the axial strength of the saw teeth before. The saw blade is therefore thicker in a central area than outside. This axially stronger region, when immersed in the slot cut by the saw teeth on the outer edge, exerts a force in the axial direction on the sawn wood and thus acts as a wedge.
Im Unterschied dazu sind im Stand der Technik überwiegend Kreissägeblätter verbreitet, die im Wesentlichen eine konstante Stärke über den größten Teil der Kreisfläche aufweisen und bei denen lediglich die Sägezähne außen in axialer Richtung stärker als diese Kreisfläche ausgebildet sind. Hier sägen also die Sägezähne einen Schlitz in das Holz, der mit dem Rest des Sägeblattes nicht oder allenfalls unbeabsichtigt und unwesentlich in Berührung kommt. Es soll bei solchen Kreissägeblättern gerade vermieden werden, dass zwischen anderen Bereichen des Sägeblattes als den eigentlichen Sägezähnen und dem Holz eine wesentliche Reibung auftritt. Dabei müssen die Sägezähne auch eine gewisse axiale Mindeststärke aufweisen, die zu einem entsprechenden Schnittverlust führt.In contrast, in the prior art predominantly circular saw blades are widespread, which essentially have a constant thickness over most of the circular area and in which only the saw teeth outside in the axial direction are formed stronger than this circular area. So here the saw teeth saw a slot in the wood, which comes with the rest of the saw blade or at best unintentionally and negligible in touch. It should be just avoided in such circular saw blades that occurs between other areas of the saw blade than the actual saw teeth and the wood a significant friction. The saw teeth must also have a certain minimum axial strength, which leads to a corresponding loss of cut.
Im Unterschied dazu soll bei der Erfindung die axiale Stärke der Sägezähne nicht die "dickste Stelle" des Querschnittsprofils des Sägeblattes bilden. Allerdings können die Sägezähne auch bei einem erfindungsgemäßen Sägeblatt axial stärker als der direkt innen anschließende Teil des Sägeblattes sein. Im Übrigen wird das Sägeblatt aber jedenfalls weiter innen stärker als die Sägezähne. Die Sägezähne selbst können mit einer relativ geringen axialen Stärke ausgelegt werden, was ganz maßgebliche Verringerungen der Schnittverluste ermöglicht. Diese geringen Sägezahnstärken sind durch die bessere Stabilität des weiter innen verdickten Sägeblattes nicht notwendigerweise mit Stabilitätsproblemen verbunden. Bei der Erfindung wird vielmehr dem inneren Bereich des Sägeblattes auch die Funktion zugewiesen, für die notwendige Stabilität des Gesamtsägeblattes zu sorgen. Eine Berührung zwischen axial stärkeren Bereichen weiter innen im Sägeblatt und dem von den Sägezähnen bereits geschnittenen Holz wird nicht als Problem angesehen, sondern vielmehr im Sinn der bereits erwähnten Keilwirkung angestrebt. Diese Keilwirkung sorgt dann dafür, dass zumindest eine der durch den Schnitt getrennten Holzseiten etwas weggedrückt wird.In contrast, should not form the "thickest point" of the cross-sectional profile of the saw blade in the invention, the axial strength of the saw teeth. However, even with a saw blade according to the invention, the saw teeth can be axially stronger than the part of the saw blade which adjoins directly inside. Incidentally, the saw blade but in any case further inside stronger than the saw teeth. The saw teeth themselves can be designed with a relatively low axial strength, which allows quite significant reductions in cutting losses. These low sawtooth strengths are not necessarily associated with stability problems due to the better stability of the further thickened saw blade. In the invention, the inner region of the saw blade is also assigned the function of providing the necessary stability of the overall saw blade. A contact between axially thicker areas further inside the saw blade and the already cut by the saw teeth wood is not considered a problem, but rather in the sense of the aforementioned wedge effect sought. This wedge effect then ensures that at least one of the wood sides separated by the cut is pushed away somewhat.
Ferner wird der Bereich der Anlage zwischen den gesägten Holzseiten und dem Bereich des Sägeblattes, der die erwähnte Keilwirkung ausübt, mit einem flüssigen Schmier- und Kühlmittel beaufschlagt. Dieses kann während des laufenden Sägevorgangs durch eine Schlauchleitung oder dgl. eingeleitet werden oder auch eingesprüht werden. Vorzugsweise handelt es sich dabei um ein Schmiermittel auf Wasserbasis, das den nachfolgenden Trocknungsprozess nicht stört, die gesägten Lamellen nicht in ihrer Qualität beeinträchtigt, geringe Kosten verursacht und keine Umweltproblematik aufwirft. Besonders bewährt hat sich hier eine Lösung aus Seifen, insbesondere Schmierseife, in Wasser.Further, the area of the plant between the sawn wood sides and the region of the saw blade, which exerts the mentioned wedge effect, applied to a liquid lubricant and coolant. This can be initiated during the sawing process by a hose or the like. Or be sprayed. Preferably, this is a water-based lubricant that does not interfere with the subsequent drying process, does not affect the sawn lamellae in their quality, low cost and no Raises environmental issues. Has proven particularly useful here a solution of soaps, especially soft soap, in water.
Bevorzugt ist eine kontinuierliche, also ohne stufenartige Sprünge erfolgende, Abnahme der Stärke des Sägeblattes von dem dickeren Bereich radial nach außen. Wie bereits erwähnt, können die Sägezähne selbst etwas stärker als der unmittelbar angrenzende Sägeblattbereich sein, so dass hier auch eine diskontinuierliche und stufenweise Stärkenzunahme oder -abnahme zugelassen ist. Dies bezieht sich aber bei dieser bevorzugten Ausgestaltung nur auf den Übergang zu den Sägezähnen selbst und sozusagen auf den "Schatten" der Sägezähne in radialer Richtung, also auf diskontinuierliche Sprünge, die in radialer Projektion nicht über die Stärke der Sägezähne hinausgehen. Ferner können natürlich im innersten Bereich des Sägeblattes, in dem sich keine Holzberührung ergibt, Stärkensprünge notwendig sein, etwa aus montagetechnischen Gründen, um das Sägeblatt sinnvoll auf der Antriebsachse montieren zu können. Ferner sind diskontinuierliche Rücksprünge, die von dem gesägten Holz auf seinem Weg entlang dem Sägeblatt nach innen nicht als diskontinuierlicher Stärkenzuwachs wahrgenommen werden, auch bei dieser Ausgestaltung möglich, wenngleich nicht besonders bevorzugt.Preferably, a continuous, ie without step-like jumps, decrease in the thickness of the saw blade from the thicker region radially outward. As already mentioned, the saw teeth themselves can be somewhat stronger than the immediately adjacent saw blade area, so that here too a discontinuous and stepwise increase or decrease in the thickness is permitted. However, in this preferred embodiment, this refers only to the transition to the saw teeth themselves and, as it were, to the "shadow" of the saw teeth in the radial direction, that is to discontinuous jumps that do not exceed the thickness of the saw teeth in radial projection. Furthermore, of course, in the innermost region of the saw blade, in which there is no contact with the wood, thickness jumps may be necessary, for example for assembly reasons, to be able to mount the saw blade meaningfully on the drive axle can. Furthermore, discontinuous recesses, which are not perceived by the sawed wood on its way inwardly along the saw blade as a discontinuous increase in strength, are also possible in this embodiment, although not particularly preferred.
Ferner ist bevorzugt, dass die Stärkenabnahme von dem dickeren Bereich radial nach außen monoton verläuft, also dabei keine Stärkenzunahme mehr erfolgt. Vorzugsweise erfolgt sie sogar streng monoton, handelt es sich also um eine beständige ununterbrochene Stärkenverringerung in der Richtung radial nach außen. Dies gilt natürlich wiederum mit Ausnahme des Übergangs zu den Sägezähnen und auch nicht notwendigerweise für die Bereiche radial innerhalb des stärksten Bereichs des Sägeblattes.Furthermore, it is preferred that the decrease in strength runs monotonically radially from the thicker region to the outside, that is, there is no longer an increase in strength. Preferably, it is even strictly monotone, so it is a continuous uninterrupted strength reduction in the direction radially outward. Of course, this again applies except for the transition to the saw teeth and not necessarily for the areas radially within the strongest area of the saw blade.
Allerdings ist vorzugsweise die radiale Mitte des Sägeblattes tatsächlich auch der Bereich der größten axialen Stärke, der sich, wie das Ausführungsbeispiel zeigt, auch um einen beträchtlichen Anteil des Gesamtradius nach außen fortsetzen kann.However, preferably the radial center of the saw blade is actually also the region of greatest axial strength which, as the embodiment shows, can also continue to the outside by a considerable proportion of the total radius.
Hinsichtlich der Verteilung der axialen Stärke auf die beiden Seiten des Sägeblattes, also sozusagen in den beiden achsparallelen Richtungen, sind zwei Fälle besonders bevorzugt. Im einen Fall ist diese Verteilung auf beiden Seiten gleich, ist das Sägeblatt also (von einzelnen geometrischen Details der Sägezähne abgesehen) zu einer Mittenebene senkrecht auf der Achse spiegelsymmetrisch. Ein solches Sägeblatt entfaltet eine symmetrische Keilwirkung auf beiden durch den Sägeschnitt getrennten Seiten.With regard to the distribution of the axial thickness on the two sides of the saw blade, so to speak in the two axis-parallel directions, two cases are particularly preferred. In one case, this distribution is the same on both sides, so the saw blade is (apart from individual geometrical details of the saw teeth) to one Center plane perpendicular to the axis mirror-symmetrical. Such a saw blade unfolds a symmetrical wedging action on both sides separated by the saw cut.
Eine zweite bevorzugte Variante sieht einen "einseitigen" Stärkenzuwachs vor, wobei also die Keilwirkung nur auf einer Seite vorliegt und die andere Seite vorzugsweise flach ist, also die durch den Sägeschnitt abgetrennte Holzseite nicht oder unwesentlich berührt. Hierbei ergibt sich demzufolge eine asymmetrische Keilwirkung.A second preferred variant provides for a "one-sided" increase in strength, that is, the wedge effect is present only on one side and the other side is preferably flat, so that not touched or insignificantly touched by the saw cut wood side. This results in an asymmetric wedge effect.
Vorzugsweise werden die symmetrischen Sägeblätter dann eingesetzt, wenn ein zentraler Schnitt zwei Lamellen erzeugt, die durch die Keilwirkung beidseits etwas weggebogen werden. Hier kann dann der aus Stabilitätsgründen notwendige Stärkenzuwachs und die durch die Keilwirkung erzeugte Spannung im Holz auf beide Seiten verteilt werden.Preferably, the symmetrical saw blades are used when a central section produces two lamellae, which are bent away on both sides by the wedge effect. Here then the starch gain necessary for reasons of stability and the tension generated by the wedge effect in the wood can be distributed on both sides.
Die asymmetrische "einseitige" Variante findet vorzugsweise dann Verwendung, wenn zwei Sägeblätter auf einer gemeinsamen Antriebsachse vorgesehen sind und mit der jeweils als Keil ausgestalteten Seite nach außen liegen. Dann wird durch die parallelen und gemeinsamen Schnitte der beiden Sägeblätter ein Kernbereich zwischen den Sägeblättern gelassen, der bei einer hier auftretenden Keilwirkung wegen der Paarung der Sägeblätter auch nicht ausweichen könnte. Die jeweiligen Außenbereiche können seitlich weggedrückt werden.The asymmetrical "one-sided" variant is preferably used when two saw blades are provided on a common drive axle and lie outward with the side designed in each case as a wedge. Then a core area between the saw blades is left by the parallel and common cuts of the two saw blades, which could not evade at a wedge effect occurring here because of the pairing of the saw blades. The respective outer areas can be pushed away laterally.
Insbesondere ist bei der Erfindung bevorzugt, zumindest eine solche Sägeblattpaarung und ein nachfolgendes, den Kernbereich symmetrisch in zwei Lamellen zerteilendes, symmetrisches Sägeblatt vorzusehen, das dann quasi seriell den beiden koaxialen Sägeblättern nachgeschaltet ist. Hiermit werden dann also insgesamt vier Lamellen erzeugt, die ersten beiden jeweils außerhalb der koaxialen Sägeblätter und die zweiten beiden innerhalb der koaxialen Sägeblätter und durch das symmetrische nachfolgende Sägeblatt getrennt. Im gleichen Sinn sind auch mehr "serielle Stufen" als eine mit zwei koaxialen Sägeblättern möglich, wobei dann pro Sägeblattpaar jeweils zwei äußere Lamellen abgeteilt werden, die von einem von den beiden seriell vorgeschalteten Sägeblättern zwischen diesen übrig gelassenen Kernbereich abgetrennt werden. Je nachdem, ob insgesamt eine gerade oder ungerade Zahl von Lamellen erzeugt werden soll, folgt schlussendlich ein symmetrisches mittiges Sägeblatt oder nicht.In particular, it is preferred in the invention to provide at least one pair of saw blades and a subsequent symmetrical saw blade which divides the core area symmetrically into two lamellae, which is then connected downstream of the two coaxial saw blades, as it were quasi serially. Hereby, a total of four fins are then produced, the first two each outside the coaxial saw blades and the second two separated within the coaxial saw blades and by the symmetrical subsequent saw blade. In the same sense, more "serial stages" than one with two coaxial saw blades are possible, in which case two outer blades are separated per saw blade pair, which are separated from one of the two serially upstream saw blades left between these core area. Depending on whether overall an odd or even number of slats is to be produced, finally follows a symmetrical central blade or not.
Schließlich können für einen einzigen Lamellenschnitt auch zwei Sägeblätter verwendet werden, die demzufolge in einer gemeinsamen Ebene liegen, also koplanar sind. Diese Sägeblätter überlappen in der Transportrichtung des Holzes gesehen etwas, weswegen eines davon geringfügig in Transportrichtung vor dem anderen liegt, damit sich keine Berührung der Sägezähne ergibt. Hiermit wird erreicht, dass das einzelne Sägeblatt nicht der gesamten Schnitttiefe entsprechen muss und damit nur um gut die Hälfte der Schnitttiefe in das Holz eintauchen muss. Die Schnitttiefe wird also auf zwei koplanare gegenüberliegende Sägeblätter aufgeteilt, wie das Ausführungsbeispiel näher illustriert. Dies gilt insbesondere auch für einzelne "Sägestationen" in einer "seriellen Verschaltung" gemäß den vorstehenden Erläuterungen.Finally, two saw blades can be used for a single sipe cut, which are therefore in a common plane, so are coplanar. These saw blades overlap slightly in the transport direction of the wood, which is why one of them lies slightly in the transport direction in front of the other, so that there is no contact of the saw teeth. This ensures that the individual saw blade does not have to correspond to the entire depth of cut and thus only has to dive into the wood by more than half the depth of cut. The depth of cut is thus divided into two coplanar opposite saw blades, as the embodiment illustrated in more detail. This also applies in particular to individual "sawing stations" in a "serial connection" according to the above explanations.
Bei einer weiteren bevorzugten Ausgestaltung ist dem Sägeblatt oder den Sägeblättern, also der Kreissäge bzw. Sägeeinheit, eine Hobeleinheit vorgeschaltet. Diese hobelt zumindest eine Seitenfläche, die zu der axialen Richtung der Sägeblätter senkrecht steht, plan und schafft damit eine definierte Ebene für die Maßeinstellung der nachfolgenden Sägeschnitte.In a further preferred embodiment, the saw blade or the saw blades, ie the circular saw or saw unit, a planer unit upstream. This plans plane at least one side surface which is perpendicular to the axial direction of the saw blades, and thus creates a defined plane for the Maßeinstellung the subsequent saw cuts.
Ein besonderer Vorteil und gleichzeitig auch ein wichtiges bevorzugtes Merkmal der Erfindung besteht darin, dass ungetrocknetes Holz bzw. Holz mit einem hohen Restfeuchteanteil geschnitten werden kann bzw. geschnitten wird. Insbesondere kann im Wesentlichen ungelagertes und ungetrocknetes frisches Holz in Lamellen zersägt werden, die aufgrund der erheblich viel größeren spezifischen Oberfläche mit sehr viel geringerem Zeitaufwand getrocknet werden können. Ferner sorgt die Verwendung frischen Holzes dafür, dass Maßfehler durch einen Verzug des Holzes während eines Trocknungsprozesses vor dem Lamellensägen vermieden werden. Der geringere Verzug äußert sich auch darin, dass bei der bereits genannten Herstellung einer planen Bezugsfläche durch Hobeln weniger Abfall auftritt, weil die vorliegende (Grob-)Sägefläche weniger uneben ist. Schließlich sind Qualitätsminderungen durch Risse ein geringeres Problem, weil sich bei der Trocknung der bereits geschnittenen Lamellen infolge der deutlich geringeren Materialstärken auch kleinere Spannungen aufbauen. Das ungetrocknete Holz hat in Zusammenhang mit den Erfindung ferner den Vorteil, dass es sich durch die erwähnte Keilwirkung etwas besser wegdrücken lässt, weil es elastischer reagiert als bereits getrocknetes Holz. Der Begriff des ungetrockneten Holzes soll hier insbesondere Holz mit einer Restfeuchte von mindestens 15 %, vorzugsweise mindestens 20 % und besonders bevorzugter Weise mindestens 30 % betreffen.A particular advantage and at the same time an important preferred feature of the invention is that undried wood or wood with a high residual moisture content can be cut or cut. In particular, essentially unsaved and undried fresh wood can be sawed into lamellae, which can be dried with much less time due to the much larger specific surface area. Furthermore, the use of fresh wood ensures that dimensional errors due to warping of the wood during a drying process prior to the sawing are avoided. The lower distortion also manifests itself in the fact that in the above-mentioned production of a flat reference surface by planing less waste occurs because the present (rough) sawing surface is less uneven. Finally, quality reductions caused by cracks are less of a problem because even smaller stresses build up during the drying of the already cut slats as a result of the significantly lower material thicknesses. The undried wood has in connection with the invention also has the advantage that it presses slightly better by the mentioned wedge effect leaves because it reacts more elastic than already dried wood. The term "undried wood" is intended to refer in particular to wood having a residual moisture content of at least 15%, preferably at least 20% and particularly preferably at least 30%.
Der Begriff der Lamellen wurde bereits als allgemeiner Begriff für die Erzeugnisse des erfindungsgemäßen Verfahrens eingeführt. Vorzugsweise sind damit jedoch Bretter gemeint, die in der axialen Richtung des Sägeblattes eine Stärke von höchstens 15 mm, vorzugsweise höchstens 13 mm und besonders bevorzugter Weise höchstens 11 mm aufweisen, was für Laubholz und für Weichholz gilt. Weichholz ist grundsätzlich von besonderem Interesse.The term lamellae has already been introduced as a general term for the products of the process according to the invention. Preferably, however, this refers to boards having a thickness of at most 15 mm, preferably at most 13 mm and particularly preferably at most 11 mm in the axial direction of the saw blade, which applies to hardwood and softwood. Softwood is of special interest.
Die entstehenden Lamellen können erfindungsgemäß für Mehrschichtbauplatten eingesetzt werden, etwa für sog. Massivholzplatten, die aus einer Mehrzahl Lagen entsprechender Lamellen zusammengeleimt sind, aber auch für Kernbereiche, Oberseite oder Unterseite anderer Mehrschichtbauplatten oder eines Fußbodenbelags, auch als Nutzschicht desselben. Gerade bei teureren Holzsorten ist die Tatsache, dass erfindungsgemäß durch die geringeren axialen Stärken der Sägezähne weniger Sägeverschnitt und aus den bereits geschilderten Gründen auch geringere Hobelverluste auftreten, von besonderem Interesse.The resulting lamellae can be used according to the invention for multi-layer building boards, such as so-called. Solid wood panels, which are glued together from a plurality of layers of corresponding fins, but also for core areas, the top or bottom of other multi-layer building boards or a floor covering, as a wear layer same. Especially with more expensive types of wood is the fact that according to the invention by the lower axial strengths of the saw teeth less saw cut and for the already described reasons also lower planing losses occur, of particular interest.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels näher erläutert, wobei die einzelnen Merkmale auch in anderen Kombinationen erfindungswesentlich sein können und sich, wie bereits erwähnt, implizit auf alle Kategorien der Erfindung beziehen.
- Figur 1
- zeigt eine Schnittansicht längs des Radius durch zwei erfindungsgemäße Kreissägeblätter.
Figur 2- zeigt eine
Figur 1 entsprechende Darstellung eines symmetrischen erfindungsgemäßen Kreissägeblattes. Figur 3- zeigt eine schematische Darstellung zur Aufteilung eines Brettes in zwei Lamellen durch eine mit Sägeblättern gemäß
Figur 1 ausgestattete Kreissäge. - Figur 4
- zeigt eine perspektivische Ansicht einer erfindungsgemäßen Sägeeinheit mit Kreissägen, die Sägeblätter gemäß
Figur 1 aufweisen.
- FIG. 1
- shows a sectional view along the radius through two circular saw blades according to the invention.
- FIG. 2
- shows one
FIG. 1 corresponding representation of a symmetrical circular saw blade according to the invention. - FIG. 3
- shows a schematic representation of the division of a board in two blades by one with saw blades according to
FIG. 1 equipped circular saw. - FIG. 4
- shows a perspective view of a saw unit according to the invention with circular saws, the saw blades according to
FIG. 1 exhibit.
Die weiteren Erläuterungen anhand
Die einzelnen Sägeblätter 1 weisen eine äußere Zahnreihe 3 mit einer axialen Stärke von 1,6 mm auf. Radial innerhalb dieser Zahnreihe 3 springt die axiale Stärke auf 1 mm zurück, wobei der weitaus größere Teil des Rücksprungs, wie die Ausschnittsdarstellung in
Grundsätzlich sind Winkel im Bereich von 1 bis 5°, vorzugsweise 2 bis 5° und besonders bevorzugterweise 2,5 bis 4° von Vorteil.In principle, angles in the range of 1 to 5 °, preferably 2 to 5 ° and particularly preferably 2.5 to 4 ° are advantageous.
Insgesamt zeigt sich damit ein Kreissägeblatt des Radius 175 mm mit einer vergleichsweise sehr geringen Sägezahnstärke von 1,6 mm, jedoch einer Kernstärke von 5 mm. Im Vergleich dazu wären typische Maße eines konventionellen Kreissägeblattes eine Sägezahnstärke von 2,9 mm oder 2,5 mm bei einer homogenen Stärke des übrigen Kreissägeblattes von etwa 1,8 mm.Overall, this shows a circular saw blade of radius 175 mm with a comparatively very small sawtooth thickness of 1.6 mm, but a core thickness of 5 mm. In comparison, typical dimensions of a conventional circular saw blade would be a sawtooth thickness of 2.9 mm or 2.5 mm with a homogeneous thickness of the remaining circular saw blade of about 1.8 mm.
Bevorzugte Lamellengeometrien liegen im Bereich von 4 bis 10, vorzugsweise 5 bis 9 mm Stärke und etwa 100 bis 200 mm Breite, und solche Lamellen können aus Brettern mit beispielsweise 50 mm Stärke oder mehr geschnitten werden. Man erkennt leicht, dass sich entweder durch Verwendung dünnerer Ausgangsbretter oder durch Erzeugung einer oder sogar mehr als einer zusätzlichen Lamelle aus derselben Ausgangsstärke direkte ökonomische Vorteile aus den verringerten Sägeschnittverlusten ableiten lassen. Das erfindungsgemäße Sägeblatt hat infolge des im Wesentlichen kontinuierlichen Anstiegs seiner Stärke bis auf 5 mm eine hervorragende Stabilität und drückt durch die axiale Keilwirkung die entstandenen Lamellen etwas auseinander.Preferred lamella geometries are in the range of 4 to 10, preferably 5 to 9 mm thick and about 100 to 200 mm wide, and such lamellae may be cut from boards of, for example, 50 mm thick or more. It is readily apparent that either by using thinner starting boards or by producing one or even more than one additional blade of the same starting power, direct economic benefits can be derived from the reduced saw blade losses. The saw blade according to the invention has an outstanding because of the substantially continuous increase in its thickness to 5 mm Stability and pressed by the axial wedge effect the resulting slats slightly apart.
Die Sägeeinheit umfasst bei diesem Beispiel sechs einzelne Kreissägen 4a bis 4f mit jeweils vertikal liegenden Antriebsachsen. Die Antriebsachsen der Kreissägen 4b, 4d, 4f sind mit 5b, 5d, 5f bezeichnet, die übrigen Antriebsachsen sind durch Abdeckhauben verdeckt, die bei den Kreissägen 4b, 4d, 4f hochgeklappt sind.The saw unit in this example comprises six individual circular saws 4a to 4f, each with vertical drive axles. The drive axes of the
Der Antrieb der Achsen erfolgt über Elektromotoren 6, von denen die den Kreissägen 4b, 4d, 4f zugeordneten Motoren 6b, 6d, 6f zusammen mit einem jeweils oben angeschlossenen Antriebszahnriemen dargestellt sind.The axes are driven by electric motors 6, of which the
Die Kreissägen sind jeweils quer zur Transportrichtung des Holzes verschiebbar und einstellbar. Entsprechende Führungen sind für die Kreissägen 4b, 4d, 4f erkennbar und mit 7b, 7d, 7f bezeichnet. Die entsprechenden Stellorgane finden sich darunter und sind nicht näher bezeichnet.The circular saws are each displaced transversely to the transport direction of the wood and adjustable. Corresponding guides are recognizable for the
In der Figur nicht näher dargestellt sind Kühlflüssigkeitsleitungen, die eine wässrige Schmierseifenlösung zu den jeweiligen Kreissägeblättern leiten und in den Schnittbereich einlaufen lassen.In the figure, not shown in detail are cooling fluid lines, which direct an aqueous solution of greasy soap to the respective circular saw blades and run into the cutting area.
Wie bereits an früherer Stelle erläutert sind die asymmetrischen Sägeblätter 1 gemäß
Nach Durchlauf durch das letzte Kreissägenpaar 4a und 4b und die Führungen 8 dahinter werden die Lamellen insgesamt von einer Walzenförderstation gegriffen und aus der Sägeeinheit weiter transportiert, um in an sich bekannter Weise gestapelt zu werden.After passing through the last pair of circular saws 4a and 4b and the guides 8 behind them, the slats are gripped in total by a roller conveyor station and further transported from the saw unit to be stacked in a conventional manner.
Claims (17)
- A method for sawing of lamellas (2a, 2b) from wood (2) using a circular saw (4a -4f) with a circular saw blade (1),
wherein said circular saw blade (1) comprises saw teeth (3) at its perimeter having a smaller axial thickness than a region of said saw blade (1) radially within said saw teeth (3)
said saw blade (1) acting as a wedge on the sawed wood (2) due to this difference in thickness,
characterized in that a liquid cooling agent is supplied to said wood (2), said agent cooling and lubricating said wood (2) during sawing of said lamellas. - The method according to claim 1, wherein said axial thickness of said circular saw blade (1) decreases continuously from said region towards a radially inner edge of said saw teeth (3).
- The method according to claim 1 or 2, wherein said axial thickness of said circular saw blade (1) decreases monotonously from said region towards said radially inner edge of said saw teeth (3).
- The method according to one of the preceding claims, wherein said circular saw blade (1) has its greatest axial thickness at its radial center.
- The method according to one of the preceding claims, wherein the decrease in strength is realized on both axial sides of said saw blade and is preferably realized symmetrically.
- The method according to one of the preceding claims, wherein said circular saw (4a -4f) comprises two saw blades (1) according to claim 1 on a common driving axis (5a - 5f).
- The method according to claim 6, wherein said saw blades (1) on said common driving axis (5a - 5f) feature an axially one-sided decrease in thickness on sides facing away from each other.
- The method according to one of the preceding claims, wherein at least two saw blades (1) which are placed serially in the direction of transport of said wood (2) are used.
- The method according to one of the preceding claims, wherein two co-planar saw blades (1) which overlap in the direction of transport of said wood (2) are used.
- The method according to one of the preceding claims, wherein said wood (2) is planed prior to sawing of said lamellas (2a, 2b) in order to flatten said wood (2) and adjust its thickness.
- The method according to one of the preceding claims, wherein said wood (2) is undried during sawing of said lamellas (2a. 2b).
- The method according to one of the preceding claims, wherein said cooling agent comprises water as a main constituent.
- The method according to claim 12, wherein said cooling agent comprises soap and preferably soft soap.
- The method according to one of the preceding claims, wherein said sawed lamellas (2a, 2b) have a thickness of at most 15 mm in the axial direction of said circular saw blade (1).
- The method according to one of the preceding claims, wherein multi-layered building boards, e.g. solid wooden boards or covering floor boards, are produced from said lamellas (2a, 2b).
- A sawing unit for sawing of lamellas (2a, 2b) from wood (2),
comprising a circular saw (4a - 4f) with a circular saw blade (1),
wherein said circular saw blade (1) has saw teeth (3) at its perimeter having less axial thickness than a region of said saw blade (1) radially within said saw teeth (3)
enabling said saw blade (1) to act as a wedge on the sawed wood (2) during sawing due to this difference in thickness,
characterized by a device for supplying a liquid cooling agent to said wood (2) which agent cools and lubricates said wood (2) during sawing of said lamellas. - The sawing unit according to claim 16, adapted for a method according to one of claims 2 to 15.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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SI200630118T SI1872918T1 (en) | 2006-06-30 | 2006-06-30 | Sawing of wood boards with a circular saw |
EP06116385A EP1872918B1 (en) | 2006-06-30 | 2006-06-30 | Sawing of wood boards with a circular saw |
PL06116385T PL1872918T3 (en) | 2006-06-30 | 2006-06-30 | Sawing of wood boards with a circular saw |
ES06116385T ES2316007T3 (en) | 2006-06-30 | 2006-06-30 | SAWING WOODEN TABLES WITH A CIRCULAR SAW. |
DE502006001343T DE502006001343D1 (en) | 2006-06-30 | 2006-06-30 | Sawing wooden boards with a circular saw |
DK06116385T DK1872918T3 (en) | 2006-06-30 | 2006-06-30 | Sawing wooden boards with a circular saw |
AT06116385T ATE404334T1 (en) | 2006-06-30 | 2006-06-30 | SAWING BOARDS OF WOOD WITH A CIRCULAR SAW |
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EP06116385A EP1872918B1 (en) | 2006-06-30 | 2006-06-30 | Sawing of wood boards with a circular saw |
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EP1872918A1 EP1872918A1 (en) | 2008-01-02 |
EP1872918B1 true EP1872918B1 (en) | 2008-08-13 |
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EP06116385A Active EP1872918B1 (en) | 2006-06-30 | 2006-06-30 | Sawing of wood boards with a circular saw |
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EP (1) | EP1872918B1 (en) |
AT (1) | ATE404334T1 (en) |
DE (1) | DE502006001343D1 (en) |
DK (1) | DK1872918T3 (en) |
ES (1) | ES2316007T3 (en) |
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Cited By (1)
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RU2710719C1 (en) * | 2019-01-29 | 2020-01-10 | Артём Владимирович Власов | Round saw |
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DE102013201291A1 (en) * | 2013-01-28 | 2014-07-31 | Albert Knebel Gmbh & Co. Kg Holding | Saw blade with integrated chip space |
DE102014105352A1 (en) * | 2014-04-15 | 2015-10-15 | Tpv Gmbh | Apparatus and method for slicing a frozen stranded food |
CN112829009A (en) * | 2020-12-31 | 2021-05-25 | 浙江晶通塑胶有限公司 | Production method for effectively recycling cork waste of floor |
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Publication number | Priority date | Publication date | Assignee | Title |
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EP0211423B1 (en) * | 1985-08-09 | 1991-01-09 | Berthold Fries | Disc-shaped rotary tool |
DE4121021A1 (en) * | 1991-06-18 | 1992-12-24 | Wurster & Dietz Maschf | METHOD AND DEVICE FOR SEPARATING OR SLITING A RIGID CUT |
DE202006001047U1 (en) * | 2006-01-23 | 2006-05-11 | Taflo, Roland | Tool kit for profiling and separation of trimmed timbers, has first profile cutter for production of first groove at side of lumber and second profile cutter provided for production of second groove at opposite side of lumber |
-
2006
- 2006-06-30 EP EP06116385A patent/EP1872918B1/en active Active
- 2006-06-30 ES ES06116385T patent/ES2316007T3/en active Active
- 2006-06-30 SI SI200630118T patent/SI1872918T1/en unknown
- 2006-06-30 DK DK06116385T patent/DK1872918T3/en active
- 2006-06-30 PL PL06116385T patent/PL1872918T3/en unknown
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Cited By (1)
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---|---|---|---|---|
RU2710719C1 (en) * | 2019-01-29 | 2020-01-10 | Артём Владимирович Власов | Round saw |
Also Published As
Publication number | Publication date |
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ATE404334T1 (en) | 2008-08-15 |
DK1872918T3 (en) | 2008-12-15 |
SI1872918T1 (en) | 2009-06-30 |
ES2316007T3 (en) | 2009-04-01 |
PL1872918T3 (en) | 2009-05-29 |
EP1872918A1 (en) | 2008-01-02 |
DE502006001343D1 (en) | 2008-09-25 |
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