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148 records – page 1 of 15.

Achieving maximum performance from computer optimized log bucking

https://library.fpinnovations.ca/en/permalink/fpipub865
Author
Wang, S.J.
Giles, D.R.
Date
January 1988
Edition
37211
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, S.J.
Giles, D.R.
Date
January 1988
Edition
37211
Material Type
Research report
Physical Description
30 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Simulation
Saw mills
Efficiency
Recovery
Logs
Automatic control
Series Number
W-533
Location
Vancouver, British Columbia
Language
English
Abstract
Logging - Bucking
Sawmilling - Computer simulation
Sawmilling - Efficiency
Recovery
Sawmilling - Automation
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Les alignements des machines de la scierie

https://library.fpinnovations.ca/en/permalink/fpipub41743
Author
Pleau, J.H.
Date
March 1996
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pleau, J.H.
Date
March 1996
Material Type
Research report
Physical Description
73 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saws
Sawing
Saw mills
Canada
Series Number
Publication spéciale SP522F
E-2915
Location
Sainte-Foy, Québec
Language
French
ISBN
0864885222
ISSN
08250030
Abstract
L'alignement précis des équipements de coupe est un moyen recommandé pour assurer la maximisation du rendement matière et de la qualité des produits manufacturés. Les tendances de l'industrie s'orientent de plus en plus vers l'utilisation de scies minces et vers une réduction maximale des dimensions-cibles. Il est essentiel pour la qualité des produits désirés que les préposés de l'entretien et de l'alignement des machines fassent un ajustement de haute précision. Le succès d'un alignement précis dépend en grande partie de la précision des outils utilisés pour accomplir ce travail. Un niveau de précision est calibré de façon telle à permettre de mesurer les déviations du nivelage par unité de millième de pouce. Ce livre propose des formules pratiques que l'expérience en milieu de travail peut mettre à profit. Les méthodes d'alignement s'appliquent à l'ensemble de la machinerie des centres de transformation: équarrisseuse-déchiqueteuse ("Chipper Canter"), scie de tête à ruban avec le chariot, scie de tête à rubans jumelés ("Twin Band"), refendeuse verticale, refendeuse à ruban horizontal, scie de tête circulaire avec le chariot et déligneuse à scies multiples ("Bull Edger").
Scieries
Machines
Alignements
Sawmills
Equipment Adjustments
Forintek Canada Corp. - Publications
Documents
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Analyse comparative des équipements MSR

https://library.fpinnovations.ca/en/permalink/fpipub2814
Author
Desjardins, Richard
Bédard, P.
Date
May 2005
Edition
39444
Material Type
Research report
Field
Sustainable Construction
Author
Desjardins, Richard
Bédard, P.
Date
May 2005
Edition
39444
Material Type
Research report
Physical Description
30 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Stresses
Saw mills
Equipment
Grading
Series Number
Projet General Revenue No 3242
E-4797
Location
Québec, Québec
Language
English
Abstract
Cette étude compare les performances des différentes machines de classement MSR utilisées actuellement dans l’industrie canadienne du bois de sciage. Cinq machines ont été retenues : La HCLT-7200 de Metriguard, la Dart de Eldeco, la TMG du CRIQ, la Dynagrade de Dynalyse AB et la XLG de Coe Mfg.
Lumber manufacturing
Sawmills - Equipment
Grading - Lumber - Stress, Mechanical
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An investigation into chipped surface quality problems at canter lines

https://library.fpinnovations.ca/en/permalink/fpipub5565
Author
Wang, A.
Szathmary, G.
Date
September 2001
Edition
37595
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Wang, A.
Szathmary, G.
Date
September 2001
Edition
37595
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Studs
Saw mills
Equipment
Sawing
Quality control
Qualitative analysis
Series Number
2166
W-1807
Location
Vancouver, British Columbia
Language
English
Abstract
The purpose of this study is to investigate and record the principal problems associated with chipped surface quality at canter lines and evaluate degrade and value losses due to these problems. Mill measurements were conducted in five member sawmills in British Columbia to evaluate the value losses and lumber degrades due to chipped surface defects. The test lumber was sampled from the planing mills to identify the chipping losses and main problems. The five types of chipped surface defects influencing lumber grade are: knot tear-out; failure to remove chipped spline channel; torn grain without knots; scalloping; and chipped thin end. Average value losses for all mills were $11.4/MBF and $12.6/MBF in freezing and non-freezing conditions respectively. Removing the non-freezing data from one mill changed this to $11.4/MBF and $9.0/MBF respectively. Knot tear out caused 60% of lumber to be degraded. On average, over 55% of knots had tear-out. 42.3% of trim length was caused by failure to remove chipped spline channel.
Sawing - Quality control
Defects - Knots
Sawmilling studies
Sawmills - Equipment
Documents
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Application de la vision artificielle dans les scieries europeennes : un rapport de voyage prepare pour le Conseil national de recherches du Canada (Mai 1988)

https://library.fpinnovations.ca/en/permalink/fpipub5636
Author
Middleton, G.R.
Munro, B.D.
Morin, M.
Date
January 1991
Edition
38128
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Middleton, G.R.
Munro, B.D.
Morin, M.
Date
January 1991
Edition
38128
Material Type
Research report
Physical Description
21 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Saw mills
Efficiency
Automatic control
Series Number
E-402
Location
Ottawa, Ontario
Language
French
Abstract
Sawmilling - Efficiency
Sawmills - Automation
Sawmills - Europe
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The automation of bandsaw roll-tensioning. Phase 1. Roll tensioning stresses and performance : final report

https://library.fpinnovations.ca/en/permalink/fpipub1014
Author
Taylor, J.
Hutton, S.G.
Date
July 1990
Edition
37393
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Taylor, J.
Hutton, S.G.
Contributor
BCASI Research and Development Fund.
Date
July 1990
Edition
37393
Material Type
Research report
Physical Description
49 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Band saws
Saw bands
Saws
Bands
Saw mills
Automatic control
Series Number
W-1262
Location
Vancouver, British Columbia
Language
English
Abstract
This report presents the results of the first stage of an investigation into the feasibility of developing a machine capable of automatically tensioning a bandsaw blade. The present work involves an experimental and analytical investigation of the effects of roll tensioning upon the cutting performance of the bandsaw. In order to understand the role of roll tensioning its effects on internal stress distribution, torsional and lateral natural frequencies and stiffness of the blade have been investigated. The results of strain measurements induced during different rolling patterns and with different thickness of plate and differing rolling pressures are presented and an analytical explanation of the results is given. Experimental results showing how the stiffness of the blade and its natural frequencies are affected by the roll tensioning are also presented. An accurate analytical model that relates the rolling pattern to the lateral stiffness has not been found. Cutting tests have been conducted in which the performance of a blade with no tension is compared with a blade with different levels of tensioning. The results of these tests are presented and indicate that the relationship between cutting accuracy and tensioning is very subtle.
Saws - Maintenance
Sawmilling - Automation
Saws - Band
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Benefit of surface defect information for board edger optimizer : phase II

https://library.fpinnovations.ca/en/permalink/fpipub1406
Author
Warkentin, M.
Date
February 2008
Edition
37903
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Warkentin, M.
Date
February 2008
Edition
37903
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saw mills
Equipment
Automatic control
Series Number
W-2563
Location
Vancouver, British Columbia
Language
English
Abstract
Recent advances in scanning technology have enabled the detection of surface defects in green boards. This report is the second phase of a project that was initiated to investigate the benefits of surface defect scanning (grade scanning) on the value of lumber that can be recovered from optimized edgers. The first study focused on BC Interior mills and found that little or no potential increase was available. In this study, the benefits for mills processing large logs into high value products (e.g. BC Coastal sawmills) were investigated. Sixty-six hemlock cants were evaluated, with cant widths from 12 to 27 inches - large enough to allow multiple sawing solutions. After a sawing solution was generated for each cant by an optimized shifting-saw gang edger, using only profile scanned data, a grader, taking visible defects into account, proposed alternate sawing solutions. The values of all sawing solutions were calculated and for 76% of the cants, a sawing solution proposed by the grader was more valuable than the one generated by the optimizer. The study found that an average increase of 29% in the value of large cants was available when edging decisions took surface defects into account, in comparison with the value resulting from optimization based on cant profile alone. However, it should be noted that the accurancy of vision systems will likely be less than that of a human grader so the actual gains will likely be somewhat lower.
Sawmilling - Automation
Defects - Detection
Sawmills - Equipment - Edgers
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Benefits of adjusting planner depth of cuts

https://library.fpinnovations.ca/en/permalink/fpipub1820
Author
Reny, L.E.
Date
March 1989
Edition
38340
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Reny, L.E.
Date
March 1989
Edition
38340
Material Type
Research report
Physical Description
95 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saw mills
Planing
Mathematical models
Algorithms
Series Number
3743K205
E-1087
Location
Ottawa, Ontario
Language
English
Abstract
Sawmilling - Planing
Planing - Mathematical models
Sawmilling - Mathematical models
Documents
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Bénéfices de l'optimisation du tronçonnage des bois feuillus

https://library.fpinnovations.ca/en/permalink/fpipub2631
Author
Corneau, Yvon C.
Date
March 2009
Edition
39225
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Corneau, Yvon C.
Date
March 2009
Edition
39225
Material Type
Research report
Physical Description
14 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Saw mills
Hardwoods
Series Number
Contrat d'intérêt commun no 6285
6285
Location
Québec, Québec
Language
French
Abstract
Le tronçonnage demeure pour la majorité des scieurs de bois feuillus un domaine problématique possédant un potentiel d’amélioration significatif, tant au niveau du volume sciable que du rendement valeur de la ressource disponible. La récupération de la valeur optimale d’une tige est directement liée à l’efficacité du préposé au tronçonnage. De mauvaises décisions de sa part résultent en une perte de valeur. Les principales raisons entraînant de mauvaises décisions sont la complexité et l’imprécision des lignes directrices, le grand nombre de classe de qualité, les exigences de productivité, le manque de formation et d’outils d’aide à la prise de décision. De plus, le nombre possible de combinaisons de longueur de billes et de découpes pour une même tige est assez important. L’évaluation d’une partie seulement des solutions potentielles requiert déjà un effort mental important. Un système de tronçonnage complètement optimisé demeurera probablement une solution inaccessible pour la majorité des industriels à moyen terme. Cependant, la technologie des lecteurs et des caméras progressant très rapidement, il existe une possibilité de développer un système hybride qui pourrait générer des bénéfices importants. La ressource disponible est bien souvent de piètre qualité et il est envisageable de maximiser le volume de fibre sciable en optimisant le tronçonnage selon la courbure et la géométrie des tiges. Ce projet vise à chiffrer les bénéfices potentiels de cette approche de tronçonnage et d’en valider la faisabilité économique.
Sawmilling - Bucking
Hardwoods
Documents
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Canadian sawmilling equipment manufacturing needs and opportunities : an overview

https://library.fpinnovations.ca/en/permalink/fpipub1576
Author
Corneau, Yvon C.
Date
March 1988
Edition
38082
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Corneau, Yvon C.
Date
March 1988
Edition
38082
Material Type
Research report
Physical Description
28 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saw mills
Equipment
Series Number
3743K412
E-239
Location
Ottawa, Ontario
Language
English
Abstract
Sawmilling equipment
Documents
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148 records – page 1 of 15.