EP1232818A1 - Verfahren und Einrichtung zum Schneiden eines Baumstammes - Google Patents

Verfahren und Einrichtung zum Schneiden eines Baumstammes Download PDF

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Publication number
EP1232818A1
EP1232818A1 EP02356017A EP02356017A EP1232818A1 EP 1232818 A1 EP1232818 A1 EP 1232818A1 EP 02356017 A EP02356017 A EP 02356017A EP 02356017 A EP02356017 A EP 02356017A EP 1232818 A1 EP1232818 A1 EP 1232818A1
Authority
EP
European Patent Office
Prior art keywords
log
cutting
saw blades
core
cutting unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02356017A
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English (en)
French (fr)
Inventor
Georges Brun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1232818A1 publication Critical patent/EP1232818A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature

Definitions

  • the present invention relates to machines or units for wood cutting used in particular in sawmills. These units allow from the logs, to cut a core on the one hand, and to cut said core in finished boards on the other hand.
  • Logs generally have a more or less longitudinal shape less frustoconical or homogeneous. It is therefore important to optimize the dimension of the stone which will be cut from this log, so as to reduce the better non-reusable waste
  • Cutting units are known for example by through document FR 2 499 449, in the name of the applicant. This document describes a unit comprising a movable double claw carriage longitudinally on a raceway above two saws allowing to move round wood in relation to saws.
  • a sawmill in logs comprising a log-carrying device supported by a monorail and mobile along the latter.
  • the log holder allows movement said logs with respect to one or more saw blades, for example placed one behind the other in the saw line, so that several saw cuts can be made in a log by performing a only pass through the sawmill.
  • the log support device has for this purpose vertical suspension arms whose lower ends come in taken with the end surfaces of the log placed in the saw line.
  • the object of the present invention is to avoid treatment or specific cutting of the peripheral parts cut during cutting from the log core.
  • Another object of the present invention aims to minimize the log cutting operations when cutting the core of this last.
  • Another object of the present invention aims to position so optimal cutting tools, so as to cut a homogeneous core which the dimensions are optimized with respect to the shape and dimensions of said log.
  • the cutting unit according to the invention comprises a chain feed 2 for bringing a log 4 into the cutting unit. This log 4 is thus brought back to a chain device 6 making it possible to rotate said log 4 about its longitudinal axis 8.
  • Opto-electronic means 10 positioned opposite the device pivot 6 allows to determine the profile and dimensions of the log 4 rotating on itself.
  • the opto-electronic means 10 are for example consist of a scanner with a signal transmission-reception head likely to sweep an area at least as wide as the diameter of the log 4.
  • the cutting unit also includes a carriage 14 movable on a raceway 16 and supporting arms 18.
  • the latter have a hooking claw 20 of the log 4 at their ends on the one hand, and have variable spacing to accommodate length of said logs 4.
  • the arms 18 are immobilized by any known means, so to support said log 4 and to be able to move it within the unit of cutting along a preferably straight path.
  • 20 claws advantageously position substantially in the center of the ends longitudinal of the log 4.
  • Figure 1 shows an example in which a log 4 is in course of analysis by opto-electronic means 10 and another log 4 of smaller diameter, hooked to the arms 18 via the claws 20.
  • Figure 2 is for example a side view of the cutting unit according to the invention.
  • the tools cut 22, 24 include at least two cutter cutters 22, of which only one is shown in side view, and at least two pairs of strawberries 24 can also be called "profilers", one of said pairs being shown.
  • the axis of rotation of the cutters 24 is orthogonal to the axis of rotation of the strawberry cutter 22.
  • the drive means of the strawberry splitter 22 and strawberries 24 are not shown.
  • the cutting unit also includes means for positioning not shown of the cutting tools 22, 24, and the blades saw 26 relative to the path of movement of the carriage 14, and by consequent of the log 4. This displacement is shown diagrammatically by the arrow "F".
  • the cutting unit also includes a pair of saw blades 26, for example example band saw or circular saw whose positioning depends on the positioning of the cutting tools 22, 24, and the saw blades 26, of so as to delimit the core 5 of the log 4, during the passage of this last.
  • the cutting unit according to the invention also includes a control unit for controlling the positioning means of the cutting 22, 24, and saw blades 26 according to the data in particular from opto-electronic means 10.
  • the means of training saw blades 26 are not shown.
  • the core of log 4 is cut, the latter is brought and deposited on a series of rollers transverse parallel 30 allowing to move said core 5 once declawed.
  • the core can thus be moved to a cutting unit complementary, for example a board cutting unit of said core 5 or to any other use or treatment.
  • This complementary unit includes a set of complementary saw blades, not shown and intended to cut the core 5 into boards.
  • the process of cutting the core 5 from a log 4 consists in measure and record the profile and dimensions of the log 4.
  • the latter is then fixed at its longitudinal ends between two claws 20 of the carriage 14 movable on the raceway 16.
  • the cutting tools 22, 24, and the saw blades 26 are positioned according to the measured data and recorded relating to the profile and dimensions of the log 4. This the latter is then moved into the cutting unit by performing at least a passage to cut the core 5.
  • Figure 4 shows the log 4 before being attacked by the cutting tools 22, 24.
  • end boards 32 are separated by the slicers 22 on either side of the log 4, of so as to obtain two flat base surfaces 4a on said log 4.
  • the log 4 then continues on to strawberries 24, which allow to make a notch 34 along each longitudinal edge of the surfaces basic 4a planes.
  • the progression of the log 4 then allows it to reach the level of the saw blades 26, which make it possible to separate on the one hand and on the other side of said log 4, a first board of rectangular section of which the thickness corresponds to the depth of the notch 34.
  • This profiling work and cutting is shown in Figures 6 and 7 respectively.
  • the positioning of the saw blades 26 is shown diagrammatically by mixed lines 36. This positioning automatically takes into account the cutting width of saw blades 26.
  • the first board 38 has a section perfectly rectangular and can be marketed directly.
  • the process then consists in separating on either side of the log 4, a second board 42 of perfectly rectangular section, and whose thickness corresponds to the depth of the complementary notch 40. This separation via the blades 26 is also shown by the dashed lines 36 in FIG. 9.
  • the implementation of the process according to the invention with complementary notches 40 can either be obtained by a second pass of the log 4 in the cutting unit, with a repositioning of the cutters 24 and blades 26.
  • the dogging system allows a quarter turn core 5 (see Figure 11) and continue by the same process cutting the log 4, according to Figures 12, 13 and 14.
  • the strawberry cutters 22 to flatten the ends 5a of the core 5, thus as strawberries 24 to spare additional notches 44.
  • the process according to the invention then makes it possible to obtain a core 5 perfectly rectangular or square.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Sawing (AREA)
  • Manufacture Of Wood Veneers (AREA)
EP02356017A 2001-02-16 2002-02-01 Verfahren und Einrichtung zum Schneiden eines Baumstammes Withdrawn EP1232818A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0102188A FR2821008B1 (fr) 2001-02-16 2001-02-16 Procede et unite de decoupe d'un noyau de grume
FR0102188 2001-02-16

Publications (1)

Publication Number Publication Date
EP1232818A1 true EP1232818A1 (de) 2002-08-21

Family

ID=8860149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02356017A Withdrawn EP1232818A1 (de) 2001-02-16 2002-02-01 Verfahren und Einrichtung zum Schneiden eines Baumstammes

Country Status (3)

Country Link
US (1) US20020112782A1 (de)
EP (1) EP1232818A1 (de)
FR (1) FR2821008B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991618A1 (fr) * 2012-06-08 2013-12-13 Mecanique Et L Engrenage Modernes Installation de sciage de grumes, et procede de sciage d'une grume

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2384914A1 (en) * 2002-05-03 2003-11-03 Denharco Inc. Log harvesting method and machine
US7117907B2 (en) * 2004-11-26 2006-10-10 Coe Newnes/Mcgehee Inc. Apparatus for adjustably profiling a cant
US20150352743A1 (en) * 2014-06-06 2015-12-10 WaneShear Technologies LLC Combination canting and profiling apparatus
CN111975869A (zh) * 2020-08-27 2020-11-24 淄博昱鑫商贸有限公司 名贵木材异形取芯装置
CN112171835B (zh) * 2020-10-20 2022-03-29 广东和丰创美新型材料有限公司 提高木皮耐磨性能的免漆多功能渗透型热固性纳米树脂涂装工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4327789A (en) * 1979-07-18 1982-05-04 Gebruder Linck, Maschinenfabrik Und Eisengiesserei "Gatterlinck" Method and apparatus for the chipping dissection of tree logs into all-round machined lumber products
FR2499449A1 (fr) * 1981-02-06 1982-08-13 Brun Georges Scie double permettant le sciage longitudinal de bois ronds et de bois plats
US4879659A (en) * 1987-11-24 1989-11-07 Bowlin William P Log processing systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4327789A (en) * 1979-07-18 1982-05-04 Gebruder Linck, Maschinenfabrik Und Eisengiesserei "Gatterlinck" Method and apparatus for the chipping dissection of tree logs into all-round machined lumber products
FR2499449A1 (fr) * 1981-02-06 1982-08-13 Brun Georges Scie double permettant le sciage longitudinal de bois ronds et de bois plats
US4879659A (en) * 1987-11-24 1989-11-07 Bowlin William P Log processing systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991618A1 (fr) * 2012-06-08 2013-12-13 Mecanique Et L Engrenage Modernes Installation de sciage de grumes, et procede de sciage d'une grume

Also Published As

Publication number Publication date
FR2821008A1 (fr) 2002-08-23
US20020112782A1 (en) 2002-08-22
FR2821008B1 (fr) 2003-06-06

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