WO2014174147A1 - Method for implementing log cutting in a way optimising veneer yield - Google Patents

Method for implementing log cutting in a way optimising veneer yield Download PDF

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Publication number
WO2014174147A1
WO2014174147A1 PCT/FI2014/050281 FI2014050281W WO2014174147A1 WO 2014174147 A1 WO2014174147 A1 WO 2014174147A1 FI 2014050281 W FI2014050281 W FI 2014050281W WO 2014174147 A1 WO2014174147 A1 WO 2014174147A1
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WO
WIPO (PCT)
Prior art keywords
log
blocks
veneer
different
sheets
Prior art date
Application number
PCT/FI2014/050281
Other languages
French (fr)
Inventor
Mika Hyysti
Petri LEMPINEN
Original Assignee
Raute Oyj
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 Raute Oyj filed Critical Raute Oyj
Publication of WO2014174147A1 publication Critical patent/WO2014174147A1/en

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Classifications

    • 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
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/008—Accessories specially designed for sawing machines or sawing devices comprising computers
    • 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
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/02—Cutting strips from a rotating trunk or piece; Veneer lathes
    • 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
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"

Definitions

  • the present invention relates to a method for implementing log cutting in a way which optimises veneer yield, in which method, a log is measured by a measuring apparatus and measuring data are transferred to a computer to determine the contour of the log and to determine the cutting points of blocks such that it is possible to cut the log into blocks having one or more different lengths.
  • the method enables to optimally cut bad bits out of the log.
  • Recent devices used for log measuring typically optimise log cutting based only on the lengths of blocks to be cut. Alternatively, they optimise the largest cylinder of the block based on provided yield. That is, they do not take random-sized pieces into account.
  • the object of the invention is to provide an arrangement which enables optimising both the total veneer yield obtainable in lathing and, simultaneously, a suitable distribution of blocks which provides an adequate number of blocks for all lathes at the plywood factory. This should also consider the numbers of blocks having been ordered.
  • the method according to the invention is characterised by, in the method, after having determined the contour of the log, fitting by means of a computer programmatically blocks of different sizes inside the log in a different order such that the total veneer yield of the log can be calculated and optimised considering obtainable full sheets and incomplete sheets of different grades and the demand of blocks of different lengths at the production facility.
  • Different production facilities utilise e.g. the following combinations of block lengths: 2,600 mm and 1,300 mm; 1,600 mm and 1,300 mm; 2,600 mm, 1,600 mm and 1,300 mm; 2,000 mm and 1,000 mm.
  • the optimal yield of a single cut block can be determined e.g. by a method described in specification FI20031390 which takes into account both full sheets and joint veneer.
  • Fig. 1 schematically shows optimising the cutting of a log into blocks based on the volumes of complete cylinders
  • Fig. 2 schematically shows a block having an extension
  • Fig. 3 schematically shows the result of a virtual lathing example.
  • a log is referred with number 9 and blocks obtainable from it with numbers 2-8.
  • Reference number 1 designates surplus wastage.
  • the optimisation was done based on the volumes of complete cylinders utilising two different block lengths, e.g. blocks of 2,600 mm and 1,300 mm.
  • Fig. 2 schematically shows the veneer yield of one block.
  • Reference number 11 designates a complete cylinder which determines full sheets obtainable in lathing.
  • Reference number 12 refers to incomplete sheets i.e. joint veneers obtainable from the block in lathing.
  • the block includes one or more extensions.
  • the quantitative and qualitative veneer yield obtainable from the block is determinable by programmatic simulation by outlining veneer being lathed inside the block or by performing virtual lathing into a veneer ribbon.
  • the simulation result can also be shown on a display, whereby particularly the result of virtual lathing gives an illustrative picture of the end result of the actual lathing to be realised.
  • Fig. 3 illustrates a description of sheet cutting in virtual lathing.
  • the structure of the fragmented section at the beginning determines the number of usable parts obtainable from it by cutting, which parts can be given their own values. When also the complete section is given its own value, the result is the value yield obtainable in lathing based on these.
  • the log is first measured and then all block cutting combinations are tested by virtual lathing and such combination is chosen which provides the best total veneer value of the blocks to be cut, considering also incomplete sheets in addition to full sheets. It is also possible to consider the price of sheets of different grades. For example, a full sheet obtained from the surface is often more valuable than one obtained from inside and the value of a random piece is smaller than that of a full sheet. It is possible to keep the length distribution of blocks such which corresponds the distribution required in the production lines. The required distribution can be automatically measured from the lathe lines. The logs can be measured e.g. by a laser profile scanner and measurement data are transferred to the computer. If required, the consumption of different block measurements is collected in the lathe lines.
  • Data on desired block lengths and distribution are entered on the computer and the computer makes the cutting combination and calculates veneer value for each combination by lathing the blocks virtually.
  • a measuring apparatus based e.g. on ultrasound or x-rays.
  • the measurement can be implemented in many different ways, e.g. by conveying the log through or past the measuring apparatus or by using a moving measuring apparatus which can perform the measurement as the log stays in its place.
  • the invention also relates to a cutting apparatus implementing the method, which apparatus includes a measuring gate e.g. with laser profile sensors and a computer which calculates and visualises the cutting alternatives with their yields.
  • the computer either offers the selection option to an operator or controls the cutting automatically.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Economics (AREA)
  • Human Resources & Organizations (AREA)
  • Strategic Management (AREA)
  • Manufacturing & Machinery (AREA)
  • Analytical Chemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Tourism & Hospitality (AREA)
  • Quality & Reliability (AREA)
  • Operations Research (AREA)
  • Marketing (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Business, Economics & Management (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Development Economics (AREA)
  • Game Theory and Decision Science (AREA)
  • Manufacture Of Wood Veneers (AREA)

Abstract

The invention relates to a method and an apparatus for implementing log cutting in a way optimising veneer yield. In the method, a log (9) is measured by a measuring apparatus and measuring data are transferred to a computer to determine the contour of the log and to determine the cutting points of blocks such that it is possible to cut the log into blocks (2-8) having one or more different lengths. In the method, after having determined the contour of the log, fitting by means of the computer programmatically blocks of different sizes inside the log in a different order such that the total veneer yield of the log can be calculated and optimised considering obtainable full sheets and incomplete sheets of different grades and the demand of blocks of different lengths at the production facility and/or the price of sheets of different grades.

Description

Method for implementing log cutting in a way optimising veneer yield
The present invention relates to a method for implementing log cutting in a way which optimises veneer yield, in which method, a log is measured by a measuring apparatus and measuring data are transferred to a computer to determine the contour of the log and to determine the cutting points of blocks such that it is possible to cut the log into blocks having one or more different lengths. When using one cutting measurement, the method enables to optimally cut bad bits out of the log.
Recent devices used for log measuring typically optimise log cutting based only on the lengths of blocks to be cut. Alternatively, they optimise the largest cylinder of the block based on provided yield. That is, they do not take random-sized pieces into account.
The object of the invention is to provide an arrangement which enables optimising both the total veneer yield obtainable in lathing and, simultaneously, a suitable distribution of blocks which provides an adequate number of blocks for all lathes at the plywood factory. This should also consider the numbers of blocks having been ordered.
To achieve this object, the method according to the invention is characterised by, in the method, after having determined the contour of the log, fitting by means of a computer programmatically blocks of different sizes inside the log in a different order such that the total veneer yield of the log can be calculated and optimised considering obtainable full sheets and incomplete sheets of different grades and the demand of blocks of different lengths at the production facility. Different production facilities utilise e.g. the following combinations of block lengths: 2,600 mm and 1,300 mm; 1,600 mm and 1,300 mm; 2,600 mm, 1,600 mm and 1,300 mm; 2,000 mm and 1,000 mm. The optimal yield of a single cut block can be determined e.g. by a method described in specification FI20031390 which takes into account both full sheets and joint veneer.
The invention will next be described in more detail by referring to the accompanying drawings where:
Fig. 1 schematically shows optimising the cutting of a log into blocks based on the volumes of complete cylinders, Fig. 2 schematically shows a block having an extension and
Fig. 3 schematically shows the result of a virtual lathing example.
In Fig. 1, a log is referred with number 9 and blocks obtainable from it with numbers 2-8. Reference number 1 designates surplus wastage. In this schematic example, the optimisation was done based on the volumes of complete cylinders utilising two different block lengths, e.g. blocks of 2,600 mm and 1,300 mm. Fig. 2 schematically shows the veneer yield of one block. Reference number 11 designates a complete cylinder which determines full sheets obtainable in lathing. Reference number 12 refers to incomplete sheets i.e. joint veneers obtainable from the block in lathing. In this step, the block includes one or more extensions. The quantitative and qualitative veneer yield obtainable from the block is determinable by programmatic simulation by outlining veneer being lathed inside the block or by performing virtual lathing into a veneer ribbon. The simulation result can also be shown on a display, whereby particularly the result of virtual lathing gives an illustrative picture of the end result of the actual lathing to be realised. Fig. 3 illustrates a description of sheet cutting in virtual lathing. Reference numbers designate: 21 = full joint veneer, 22 = lower-grade (heartwood) veneer, 23 = lower-grade/high-grade veneer, 24 = high-grade veneer, 25 = joint veneer, split in the middle of the web, 26 = waste. The structure of the fragmented section at the beginning determines the number of usable parts obtainable from it by cutting, which parts can be given their own values. When also the complete section is given its own value, the result is the value yield obtainable in lathing based on these.
In the method according to the invention, the log is first measured and then all block cutting combinations are tested by virtual lathing and such combination is chosen which provides the best total veneer value of the blocks to be cut, considering also incomplete sheets in addition to full sheets. It is also possible to consider the price of sheets of different grades. For example, a full sheet obtained from the surface is often more valuable than one obtained from inside and the value of a random piece is smaller than that of a full sheet. It is possible to keep the length distribution of blocks such which corresponds the distribution required in the production lines. The required distribution can be automatically measured from the lathe lines. The logs can be measured e.g. by a laser profile scanner and measurement data are transferred to the computer. If required, the consumption of different block measurements is collected in the lathe lines. Data on desired block lengths and distribution are entered on the computer and the computer makes the cutting combination and calculates veneer value for each combination by lathing the blocks virtually. It is also possible to measure the logs by a measuring apparatus based e.g. on ultrasound or x-rays. In practice, the measurement can be implemented in many different ways, e.g. by conveying the log through or past the measuring apparatus or by using a moving measuring apparatus which can perform the measurement as the log stays in its place.
The invention also relates to a cutting apparatus implementing the method, which apparatus includes a measuring gate e.g. with laser profile sensors and a computer which calculates and visualises the cutting alternatives with their yields. The computer either offers the selection option to an operator or controls the cutting automatically.

Claims

Claims
1. A method for implementing log cutting in a way optimising veneer yield, in which method, a log is measured by a measuring apparatus and measuring data are transferred to a computer to determine the contour of the log and the cutting points of blocks such that it is possible to cut the log into blocks having one or more different lengths, characterised by, in the method, after having determined the contour of the log, fitting blocks of different sizes inside the log in a different order by means of the computer programmatically such that the total veneer yield of the log can be calculated and optimised taking into consideration obtainable full sheets and incomplete sheets of different grades and, optionally, the requirement of blocks of different lengths at the production facility and/or the price of sheets of different grades.
2. A method according to claim 1, characterised by, in the method, optimising the total veneer yield by determining a qualitative veneer output for each log to be cut either by programmatic simulation by outlining the veneer to be lathed inside the block or by performing virtual lathing into a veneer ribbon.
3. An apparatus for implementing log cutting in a way optimising veneer yield, which apparatus includes a measuring apparatus for measuring a log and a computer to which measuring data are transferred, which computer determines the contour of the log and the cutting points of blocks such that it is possible to cut the log into blocks having one or more different lengths, characterised in that the computer is arranged to fit blocks of different sizes inside the log in a different order such that the total veneer yield of the log can be optimised taking into consideration obtainable full sheets and incomplete sheets of different grades and, optionally, the requirement of blocks of different lengths at the production facility and/or the price of sheets of different grades.
PCT/FI2014/050281 2013-04-23 2014-04-17 Method for implementing log cutting in a way optimising veneer yield WO2014174147A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20135415A FI20135415L (en) 2013-04-23 2013-04-23 A method for cutting a log in a way that optimizes veneer yield
FI20135415 2013-04-23

Publications (1)

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WO2014174147A1 true WO2014174147A1 (en) 2014-10-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017087461A (en) * 2015-11-04 2017-05-25 株式会社名南製作所 Raw wood cutting controller, raw wood cutting control method and raw wood cutting system
US11144029B2 (en) 2015-08-25 2021-10-12 Biatec Group a.s. Method of optimization of cutting of flat products made of natural material, mainly of wood, and system for its realization

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023805A (en) * 1988-08-23 1991-06-11 Macmillan Bloedel Limited Log scanner
US5457635A (en) * 1993-01-14 1995-10-10 Interpine Export(Nz) Limited Portable apparatus for determining cut positions in logs
WO2001067042A1 (en) * 2000-03-06 2001-09-13 Bennett Ralph W Infeed log scanning for lumber optimization
WO2002091286A2 (en) * 2001-05-09 2002-11-14 Invision Technologies, Inc. Analysis and presentation of internal features of logs
US6690990B1 (en) * 2002-12-02 2004-02-10 CENTRE DE RECHERCHE INDUSTRIELLE DU QUéBEC Method of optimizing a layout of selected parts to be cut
WO2005030449A1 (en) * 2003-09-26 2005-04-07 Raute Oyj Method for optimizing veneer peeling
US20070234860A1 (en) * 2006-03-30 2007-10-11 Stanish Mark A Method for reducing warp potential within lumber derived from a raw material
US20080015711A1 (en) * 2006-06-27 2008-01-17 Normand Charland Systems and methods for forest harvest management
US20090095377A1 (en) * 2007-10-16 2009-04-16 Earl Barker Systems and methods for tracking lumber in a sawmill

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023805A (en) * 1988-08-23 1991-06-11 Macmillan Bloedel Limited Log scanner
US5457635A (en) * 1993-01-14 1995-10-10 Interpine Export(Nz) Limited Portable apparatus for determining cut positions in logs
WO2001067042A1 (en) * 2000-03-06 2001-09-13 Bennett Ralph W Infeed log scanning for lumber optimization
WO2002091286A2 (en) * 2001-05-09 2002-11-14 Invision Technologies, Inc. Analysis and presentation of internal features of logs
US6690990B1 (en) * 2002-12-02 2004-02-10 CENTRE DE RECHERCHE INDUSTRIELLE DU QUéBEC Method of optimizing a layout of selected parts to be cut
WO2005030449A1 (en) * 2003-09-26 2005-04-07 Raute Oyj Method for optimizing veneer peeling
US20070234860A1 (en) * 2006-03-30 2007-10-11 Stanish Mark A Method for reducing warp potential within lumber derived from a raw material
US20080015711A1 (en) * 2006-06-27 2008-01-17 Normand Charland Systems and methods for forest harvest management
US20090095377A1 (en) * 2007-10-16 2009-04-16 Earl Barker Systems and methods for tracking lumber in a sawmill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11144029B2 (en) 2015-08-25 2021-10-12 Biatec Group a.s. Method of optimization of cutting of flat products made of natural material, mainly of wood, and system for its realization
JP2017087461A (en) * 2015-11-04 2017-05-25 株式会社名南製作所 Raw wood cutting controller, raw wood cutting control method and raw wood cutting system

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