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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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An experimental investigation into washboarding in bandsaws

https://library.fpinnovations.ca/en/permalink/fpipub37679
Author
Taylor, J.
Hutton, S.G.
White, J.
Date
November 2003
Material Type
Research report
Field
Wood Manufacturing & Digitalization
iii Abstract With the pressures on our industry at this time, sawmills are using thinner saws
Author
Taylor, J.
Hutton, S.G.
White, J.
Date
November 2003
Material Type
Research report
Physical Description
9 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Band saws
Saw bands
Saws
Bands
Series Number
2144
W-2013
Location
Vancouver, British Columbia
Language
English
Abstract
With the pressures on our industry at this time, sawmills are using thinner saws to try and improve recovery without reducing current production levels. This has led to washboarding becoming a widespread problem in the industry. Washboarding is a wavy pattern that appears on the surface of lumber due to excessive vibration of the sawblade as it cuts through the lumber. In this study the washboarding behaviour of saws was studied at both the analytical and experimental levels to develop a much better understanding of the problem and lead to a set of guidelines for industry use. This was a joint project between Forintek Canada Corp. and The University of British Columbia. Dr. S. G. Hutton led the analytical side of the work and Dr. J. Taylor the experimental portion of the work. This report is a portion of the overall research endeavour and presents the results of the experimental work that was conducted. To compliment and validate the analytical portion of the work a series of cutting tests were conducted to examine the washboarding phenomenon and the factors that influence its occurrence. The effects of wheel rotation speed, strain, tooth bite, and depth of cut were examined and their effects recorded. As small changes in tooth design are known to influence a saws washboarding behaviour, but are not accurately predicted by the mathematical models, we also carried out cutting tests with saws of different thickness and tooth pitch, progressively increasing the length of the tooth face and the depth of the gullet until washboarding on the lumber surface was quite severe. In this manner we hoped to be able to develop some guidelines for the industry. It was apparent from the initial tests that there were two types of washboarding. We have called the larger diagonal waves that often appear with industrial sized bandsaws, Type I. The narrow more vertical pattern or that on circular saws is called Type II. The results in this report are primarily associated with Type I and show the somewhat insensitive nature of the washboarding instability to changes in the operating parameters. The occurrence of washboarding is more sensitive to changes in the tooth geometry.
Saws - Band
Cutting - Tests
Documents
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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
p r i o r to t h i s set of cuts. 2.4 Operating Conditions The saws used f o r the c u t t i n g
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
Documents
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Bonding and wear of ceramic saw teeth

https://library.fpinnovations.ca/en/permalink/fpipub1058
Author
White, J.
Taylor, J.
Date
July 1997
Edition
37454
Material Type
Research report
Field
Wood Manufacturing & Digitalization
board. This could potentially reduce maintenance costs associated with sharpening and retipping saws
Author
White, J.
Taylor, J.
Date
July 1997
Edition
37454
Material Type
Research report
Physical Description
18 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wear
Saw tooth
Saws
Design
Series Number
Project No. 1008
W-1417
Location
Vancouver, British Columbia
Language
English
Abstract
A report on the results of tests on the feasibility of using ceramics for saw blade tips. The major factors determining whether it is practical to use ceramics are the physical attachment of the tip to the blade, the inherent brittleness of the material and its wear characteristics.
Saws - Tooth design
Cutting edges - Wear
Saws - Tipping
Documents
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Butt damage and machine productivity with various degrees of multiple-tree felling: a case study

https://library.fpinnovations.ca/en/permalink/fpipub3990
Author
Andersson, Björn
Dyson, Peter
Date
August 2005
Edition
40717
Material Type
Research report
Field
Fibre Supply
Author
Andersson, Björn
Dyson, Peter
Date
August 2005
Edition
40717
Material Type
Research report
Physical Description
7 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Saws
Advantage
Series Number
Advantage ; Vol. 6, No. 18
Language
English
Abstract
The Forest Engineering Research Institute of Canada (FERIC) examined the level of butt damage from felling with a high-speed circular-saw felling head when a feller-buncher accumulated from one to five trees per cycle. The machine's productivity for the different number of trees per cycle was recorded, and the impact of factors such as terrain and stand conditions on wood damage is discussed.
Butt damage
Felling
Fibre loss
Feller bunchers
High-speed circular saws
Heads
Documents
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Butt damage associated with high-speed circular saws in winter operations

https://library.fpinnovations.ca/en/permalink/fpipub3908
Author
Andersson, Björn
Date
July 2003
Edition
40631
Material Type
Research report
Field
Fibre Supply
Author
Andersson, Björn
Date
July 2003
Edition
40631
Material Type
Research report
Physical Description
11 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Saws
Advantage
Series Number
Advantage ; Vol. 4, No. 16
Language
English
Abstract
The Forest Engineering Research Institute of Canada (FERIC) examined the level of butt damage from felling with high-speed circular saws in three winter harvesting operations in Alberta and British Columbia. The location and extent of the butt damage on each damaged stem were recorded, and the impact of the butt damage in terms of loss of sawlog volume available for lumber manufacturing was projected. Factors influencing butt damage are discussed, and recommendations to reduce wood losses are made.
Butt damage
Felling
Fibre loss
Feller bunchers
High-speed circular saws
Documents
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Chop saw technology for lumber remanufacturing - what are the options?

https://library.fpinnovations.ca/en/permalink/fpipub891
Author
Williams, D.
Date
July 1991
Edition
37238
Material Type
Research report
Field
Wood Manufacturing & Digitalization
chop saws, has promises of increased productivity, higher recovery in either yield or value
Author
Williams, D.
Date
July 1991
Edition
37238
Material Type
Research report
Physical Description
25 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saws
Series Number
W-851
Location
Vancouver, British Columbia
Language
English
Abstract
The recent introduction of optimizing technology for cross-cutting boards (chop saw operation) has raised questions about the merits of this technology versus conventional manual systems in the British Columbia remanufacturing sector. A review of the existing technology available to chop lumber (both manual and computerized) was undertaken. A total of 30 remanufacturing plants were visited. Background material was obtained from journal articles and literature from suppliers. The relative merits of the systems in use are discussed.
Saws
Documents
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Circular saw and cone saw felling heads: an update

https://library.fpinnovations.ca/en/permalink/fpipub43286
Author
Folkema, Michael P.
Date
1984
Material Type
Research report
Field
Fibre Supply
Author
Folkema, Michael P.
Date
1984
Material Type
Research report
Physical Description
75 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Feller
Saws
Language
English
Abstract
This report is intended to be a follow-up to FERIC TN-58 "using circular saw felling heads to reduce butt splitting damage". In TR-56, shift-level production data have been collected and analysed for the Harricana and Koehring circular saw, the Denis SJ-24 twin saw, the Boreal DD-20 double-deck saw and the Lokomo cone saw felling heads. The five felling heads are compared side-by-side on various criteria such as carrier and hydraulic requirements their operational and mechanical aspects, butt splitting damage, smoothness of cut, stump height and kerf width.
FELLING
Felling heads
Saw felling heads
PRODUCTIVITY
PERFORMANCE
COSTS
Butt damage
SURVEYS
Documents
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Comparaison du rendement au sciage entre les systèmes de récolte par bois tronçonnés et par arbres entiers

https://library.fpinnovations.ca/en/permalink/fpipub5413
Author
Plamondon, Jean A.
Pagé, G.E.
Date
1997
Edition
36480
Material Type
Research report
Field
Fibre Supply
Author
Plamondon, Jean A.
Pagé, G.E.
Date
1997
Edition
36480
Material Type
Research report
Physical Description
8 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Systems
Saws
Sawing
Logging
Series Number
Fiche technique ; FT-000257
Language
French
Abstract
En novembre et décembre 1994, les rendements au sciage de deux stocks de bois résineux d'environ 75 m3 récoltés de deux façons différentes ont été comparés. Un stock de bois a été récolté en arbres entiers à l'aide d'une abatteuse-groupeuse, d'un débardeur à câble et d'une ébrancheuse à flèche. L'autre a été récolté en bois tronçonnés par une abatteuse-façonneuse et un porteur forestier. Tous les bois ont été mesurés et usinés séparément au complexe de sciage de Domtar Inc. à Val d'Or, dans la région de l'Abitibi au Québec. Les résultats étaient très semblables pour les deux stocks avec un faible écart en faveur des bois tronçonnés au niveau des rendements en volume et de la valeur anticipée d'un mètre cube. La valeur moyenne des produits usinés à partir des arbres entiers était légèrement supérieure. Les pertes après séchage étaient presque identiques. On ne peut cependant affirmer avec certitude que le contexte de l'opération était parfaitement représentatif, notamment dans le cas de la récolte par arbres entiers. D'autres études similaires seraient nécessaires pour valider les résultats présentés ici.
Rendement au sciage
SYSTEMES DE RÉCOLTE PAR BOIS TRONÇONNÉS
SYSTEME DE RÉCOLTE PAR ARBRES ENTIERS
Comparaison
Documents
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Comparison of chain saws and clearing saws for precommercial thinning in British Columbia

https://library.fpinnovations.ca/en/permalink/fpipub43258
Author
Holmsen, S.D.
Date
January 1989
Material Type
Research report
Field
Fibre Supply
Author
Holmsen, S.D.
Date
January 1989
Material Type
Research report
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Thinning
Saws
Series Number
Technical Note ; TN-137
Language
English
Abstract
In 1988, FERIC monitored two precommercial thinning operations in British Columbia: one in a coastal western hemlock stand and the other in an interior lodgepole pine stand. Both operations included side-by-side comparisons of chain saws and clearing saw. FERIC established pretreatment plots to assess stand composition and density conducted productivity assessments, and evaluated port-treatment results.
Precommercial thinning
MOTOR MANUAL METHOD
CHAIN SAWS
Brush saws
Lodgepole pine
Western hemlock
EVALUATION
PRODUCTIVITY
COSTS
BRITISH COLUMBIA
Documents
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87 records – page 1 of 9.