WO2009138191A1 - Procédé pour diviser un tronc d'arbre en produits du bois - Google Patents

Procédé pour diviser un tronc d'arbre en produits du bois Download PDF

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Publication number
WO2009138191A1
WO2009138191A1 PCT/EP2009/003281 EP2009003281W WO2009138191A1 WO 2009138191 A1 WO2009138191 A1 WO 2009138191A1 EP 2009003281 W EP2009003281 W EP 2009003281W WO 2009138191 A1 WO2009138191 A1 WO 2009138191A1
Authority
WO
WIPO (PCT)
Prior art keywords
band saw
tool
saw blade
tree trunk
log
Prior art date
Application number
PCT/EP2009/003281
Other languages
German (de)
English (en)
Inventor
Thomas Oberkobler
Original Assignee
Esterer Wd Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esterer Wd Gmbh filed Critical Esterer Wd Gmbh
Priority to EP09745525A priority Critical patent/EP2274140A1/fr
Publication of WO2009138191A1 publication Critical patent/WO2009138191A1/fr

Links

Classifications

    • 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
    • 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
    • B27B15/00—Band or strap sawing machines specially designed for length cutting of trunks
    • B27B15/06—Band or strap sawing machines specially designed for length cutting of trunks in combined arrangement with circular saws for performing simultaneously several sawing procedures

Definitions

  • the invention relates to a method for cutting a tree trunk in wood products, wherein the tree trunk is sawed by means of at least one band saw blade in the longitudinal direction and preprocessed upstream of the band saw blade by means of a tool, such that the tool generates a recess in the log, the width across the band saw blade which is at least as large as the Thomasfugendicke the band saw blade and which has a predetermined depth in the tree trunk in the direction of the band saw blade.
  • a method of the aforementioned type is known from DE 1 915 691 U.
  • the known method is used to operate a log band saw.
  • a tool is provided upstream, which cleans the incoming log before it enters the work area of the band saw at the points to be cut by removing adhering dirt or foreign matter. This is to protect the band saw and increase the service life can be achieved.
  • a scoring tool, a milling cutter or a rotating steel brush can alternatively be used.
  • the tool has two rockers disposed on opposite sides of the log, each carrying a drive motor. On the shaft of the tools can be plugged.
  • a block band saw is known in which a cutting tool with its own drive motor is arranged in front of the band saw blade. The tool is used to remove the rind of the log before entering the log into the log band saw.
  • the aim is to achieve the highest possible feed rate in order to maximize the throughput of the corresponding installation.
  • the maximum possible feed rate is determined essentially by the cutting height. The greater the cutting height, the smaller the maximum possible feed rate.
  • Rough tree trunks are conical and have a strongly progressive cross-sectional extension at their earth's end, known in technical jargon as the "trumpet.” In some sawmills, this trumpet duzierers removed, as described for example in DE 28 47 353 C3. However, this aggregate is complicated and expensive because the tree trunk must be rotated about its longitudinal axis for milling the earth's end. However, simpler sawmill systems have only longitudinal conveyor and a Erdendenreduzierer is not provided for cost reasons. In these plants, therefore, the raw tree trunk is sawn with its earth end.
  • the maximum feed rate according to the maximum cutting height i. must be sized according to the diameter of the tree trunk at the end of the earth.
  • the cutting height must therefore be set relatively low, because the diameter at the end of the earth is significantly larger than at one to two meters from the earth's end.
  • the invention is therefore the object of developing a method of the type mentioned in such a way that the above-mentioned disadvantages are avoided.
  • This object is achieved in a method of the type mentioned in that the depth is set substantially equal to half the difference between the diameter at the thicker end and the diameter above the ground end of the tree trunk.
  • the object underlying the invention is completely solved in this way. Namely, the method according to the invention solves the problem of the large cutting height in the earth end region simply by cutting the height of the normal tree trunk diameter where the band saw blade cuts through the log by advancing the excess wood on the path of the band saw blade through the earth end Will get removed. The band saw can thereby enter at full feed rate in the Erdende of the tree trunk.
  • the depth is set substantially equal to about half the difference between the diameter at the thicker end and the diameter at the thinner end of the log.
  • the tool scores the tree trunk along a joint, preferably by the tool sawing the tree trunk along the joint to the predetermined depth.
  • This measure has the advantage that exactly only as much material is removed as is necessary in order to give the band saw blade in the thickened part of the ground free path.
  • the tool cuts the tree trunk along a corner.
  • the tool is moved transversely to the tree trunk, preferably during sawing.
  • This measure has the advantage that, for example, the tool can follow the depth of the rind as it moves along the tapering log, which then makes it possible to increase the feed rate as the cutting height decreases.
  • the recess is produced with a width that is greater than the kerf thickness of the band saw blade.
  • This measure has the advantage that a bleeding of the band saw blade is prevented, which could occur due to the fact that the band saw blade rubs along the edges of a gap that is too narrow.
  • the inventive method is equally suitable for two kinematic reversed procedures, namely either the tree trunk is held space and the band saw blade and the tool relative to the tree trunk are moved in a conveying direction, or the band saw blade and the tool are held space and the tree trunk in a conveying direction is moved relative to the band saw blade and the tool.
  • the tree trunk on the one hand and the band saw blade and the tool on the other hand are moved relative to each other so that the tool initially comes at the thicker end of the log with this engaged.
  • Figure 1 is a side view, in section and in the direction of the arrows I-I of FIG
  • Figure 2 is a simplified front view of the device according to Figure 1 from the right.
  • Fig. 1 10 denotes a device which extends along an axis 11 and serves to disassemble tree trunks, one of which is shown and designated 12.
  • the log 12 has a thinner end 14 and a thicker end or ground end 16, the so-called “trumpet.”
  • the thin end 14 has a diameter d and the thick end 16 has a diameter D.
  • the diameter d is, for simplifying purposes, constant
  • the tree trunk 12 is conveyed in the illustration of Figure 1 from left to right in a feed direction 20 at a predetermined feed rate. In the example shown, it is conveyed ahead with the thicker end 16.
  • a band saw 22 is shown in Figure 1 to the right of the tree trunk 12 in a side view.
  • the band saw 22 is of conventional design, having an upper roller 24a and a lower roller 24b which are respectively rotatable about axes 26a and 26b parallel to the axis 11 in the direction of arrows 28a and 28b, respectively.
  • a band saw blade 30 runs around the rollers 24a, 24b.
  • the circular saw unit 40 Upstream of the band saw 22 is a circular saw unit 40.
  • the distance of the circular saw unit 40 from the band saw 22 in the feed direction 20 can bei- example be 0.5 to 2 m.
  • the circular saw unit 40 has an upper circular saw 42a and a lower circular saw 42b, which are rotatable about axes transverse to the axis 11 axes 44a and 44b.
  • the circular saws 42a and 42b are also transversely to the axes 11, 44a and 44b, ie in the illustration of Figure 1 up and down adjustable, as indicated by arrows 46a and 46b.
  • the circular saws 42a and 42b are set in the direction of the arrows 46a and 46b so that they have a depth of cut T at the thick end 16 which is equal to half the difference between the diameters D and d, ie Vi (D-d).
  • the kerf thickness B of the circular saws 42a and 42b is greater than the kerf thickness b of the band saw blade 30, as shown in simplified form in FIG.
  • the recess formed by the circular saws 42a and 42b in the region of the earth end of the tree trunk 12 is thus a gap in which the band saw blade can run with lateral play.
  • the cutting height is also limited to the diameter d in the area of the earth's end.
  • the band saw 22 is shown as a vertical band saw. It is understood, however, that it may also be a horizontal band saw. However, the invention is also suitable for use in conjunction with gang saws.
  • pairs of band saws 22 can be used for a tree trunk 12, for example, at the same time saw off a side board on one and the opposite longitudinal side.
  • pairs of circular saws 42a and 42b would also be provided. The same applies to gang saws with a large number of juxtaposed saw blades and correspondingly many upstream arranged circular saws.
  • the recess would then have the shape of a corner running along the tree trunk 12.
  • the tree trunk 12 as shown in the exemplary embodiment, is moved relative to the fixed band saw 22 and the circular saw unit 40 or vice versa.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

L'invention concerne un procédé pour diviser un tronc d'arbre (12) en produits du bois, procédé selon lequel le tronc d'arbre (12) est scié dans le sens longitudinal au moyen d'une lame de scie à ruban (30), et est pré-traité au moyen d'un outil, en amont de la lame de scie à ruban (30). Selon ce procédé, l'outil produit dans le tronc d'arbre (12), une saignée (48) qui présente, perpendiculairement à la lame de scie à ruban (30), une largeur qui est au moins aussi grande que l'épaisseur du joint de coupe de la lame de scie à ruban (30), et qui présente une profondeur prédéterminée (T) dans le tronc d'arbre (12), en direction de la scie à ruban (30). L'invention est caractérisée en ce que la profondeur (T) est réglée de manière à être sensiblement égale à la moitié de la différence entre le diamètre (D) à l'extrémité la plus épaisse (16) et le diamètre (d) à l'extrémité la plus mince (14) du tronc d'arbre (12).
PCT/EP2009/003281 2008-05-14 2009-05-08 Procédé pour diviser un tronc d'arbre en produits du bois WO2009138191A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09745525A EP2274140A1 (fr) 2008-05-14 2009-05-08 Procédé pour diviser un tronc d'arbre en produits du bois

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008024445.7 2008-05-14
DE200810024445 DE102008024445B3 (de) 2008-05-14 2008-05-14 Verfahren zum Zerteilen eines Baumstamms in Holzerzeugnisse

Publications (1)

Publication Number Publication Date
WO2009138191A1 true WO2009138191A1 (fr) 2009-11-19

Family

ID=40886863

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/003281 WO2009138191A1 (fr) 2008-05-14 2009-05-08 Procédé pour diviser un tronc d'arbre en produits du bois

Country Status (3)

Country Link
EP (1) EP2274140A1 (fr)
DE (1) DE102008024445B3 (fr)
WO (1) WO2009138191A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954375C (de) 1953-07-28 1956-12-13 Jean Alfred Andre Auger Nuteinziehvorrichtung fuer Saegen
DE1915691U (de) 1961-02-01 1965-05-13 Canali Geb Vorrichtung an einer blockbandsaege zum gleichzeitigen aufschneiden der vom stamm abgetrennten bohlen.
CH428178A (de) 1963-03-01 1967-01-15 Sandbichler Adolf Trennbandsäge
DE6912503U (de) 1969-03-26 1969-08-07 Scheer & Cie C F Saegemaschine mit vorritzeinrichtung
DE7105947U (de) 1971-02-17 1971-05-19 Saenger & Massierer Kg Blockbandsaege
DE2847353C2 (de) 1977-11-04 1984-01-19 Bruks Mek. AB, Arbrå Maschine zum Abfräsen des Wurzelansatzes von Baumstämmen
FR2560806A1 (fr) 1984-03-09 1985-09-13 Piguet Yvon Procede et dispositif pour favoriser le sciage dans une scie a grumes
DE3800935A1 (de) 1988-01-15 1989-07-27 Reich Maschf Gmbh Karl Ritzvorrichtung
EP0770461A2 (fr) * 1995-10-24 1997-05-02 Söderhamns Verkstäder Ab Procédé et installation pour le découpage de troncs d'arbres en produits en bois

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954375C (de) 1953-07-28 1956-12-13 Jean Alfred Andre Auger Nuteinziehvorrichtung fuer Saegen
DE1915691U (de) 1961-02-01 1965-05-13 Canali Geb Vorrichtung an einer blockbandsaege zum gleichzeitigen aufschneiden der vom stamm abgetrennten bohlen.
CH428178A (de) 1963-03-01 1967-01-15 Sandbichler Adolf Trennbandsäge
DE6912503U (de) 1969-03-26 1969-08-07 Scheer & Cie C F Saegemaschine mit vorritzeinrichtung
DE7105947U (de) 1971-02-17 1971-05-19 Saenger & Massierer Kg Blockbandsaege
DE2847353C2 (de) 1977-11-04 1984-01-19 Bruks Mek. AB, Arbrå Maschine zum Abfräsen des Wurzelansatzes von Baumstämmen
FR2560806A1 (fr) 1984-03-09 1985-09-13 Piguet Yvon Procede et dispositif pour favoriser le sciage dans une scie a grumes
DE3800935A1 (de) 1988-01-15 1989-07-27 Reich Maschf Gmbh Karl Ritzvorrichtung
EP0770461A2 (fr) * 1995-10-24 1997-05-02 Söderhamns Verkstäder Ab Procédé et installation pour le découpage de troncs d'arbres en produits en bois

Also Published As

Publication number Publication date
DE102008024445B3 (de) 2009-10-01
EP2274140A1 (fr) 2011-01-19

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