EP0710168B2 - Log band saw blade for primary wood and wood derivative processing - Google Patents

Log band saw blade for primary wood and wood derivative processing Download PDF

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Publication number
EP0710168B2
EP0710168B2 EP94922279A EP94922279A EP0710168B2 EP 0710168 B2 EP0710168 B2 EP 0710168B2 EP 94922279 A EP94922279 A EP 94922279A EP 94922279 A EP94922279 A EP 94922279A EP 0710168 B2 EP0710168 B2 EP 0710168B2
Authority
EP
European Patent Office
Prior art keywords
saw blade
wood
band
teeth
blade
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.)
Expired - Lifetime
Application number
EP94922279A
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German (de)
French (fr)
Other versions
EP0710168B1 (en
EP0710168A1 (en
Inventor
Christian Senegas
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.)
Manufacture Forezienne de Lames de Scies SA
Original Assignee
Manufacture Forezienne de Lames de Scies SA
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Application filed by Manufacture Forezienne de Lames de Scies SA filed Critical Manufacture Forezienne de Lames de Scies SA
Publication of EP0710168A1 publication Critical patent/EP0710168A1/en
Publication of EP0710168B1 publication Critical patent/EP0710168B1/en
Application granted granted Critical
Publication of EP0710168B2 publication Critical patent/EP0710168B2/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
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth: Varying pitch; Details of gullet
    • 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
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Scissors And Nippers (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)

Abstract

A log band saw blade for primary wood processing, consisting of a series of different modules (M1, M2, M3...) or identical modules each including a number of teeth (D) having variable characteristics determined in accordance with all the relevant technical criteria. In each module, the tooth portion located in front of the lowest point has a variable shape (FV) while the tooth portion located therebehind has a constant shape (FC).

Description

L'invention se rapporte à une lame de scie à ruban à la première transformation du bois selon le préambule de la revendication 1, c'est-à -dire l'ensemble de l'activité scierie incluant le débit de grumes sur scie à ruban, ainsi que la reprise de ses débits.The invention relates to a band saw blade for the first transformation of wood according to the preamble of claim 1, that is to say the whole sawmill activity including the cutting of logs on a band saw , as well as the resumption of its debits.

Actuellement, les lames de scies à ruban pour le travail du bois sont en acier spécial du type feuillard trempé laminé à froid et présentent différentes sections définies par la largeur et l'épaisseur.Currently, band saw blades for woodworking are made of special steel of the cold-rolled hardened strip type and have different sections defined by width and thickness.

La technologie actuelle offre des lames monocoupes ou bicoupes, ou avec une denture dégageante avec une denture à pas constant sur toute la longueur de la lame pour une section considérée.Current technology offers single-cut or double-cut blades, or with a loose tooth with a constant pitch tooth over the entire length of the blade for a given section.

D'une manière générale, et comme illustré à la figure 1, une denture est caractérisée par sa forme, les plus courantes étant à copeau projeté, perroquet, amstrong, gencive, couché, ses angles (angle d'attaque (a), angle de bec (b), angle de dépouille (c), son pas (P), et sa profondeur (f)).In general, and as illustrated in Figure 1, a toothing is characterized by its shape, the most common being with projected chip, parrot, amstrong, gum, lying, its angles (angle of attack (a), angle beak (b), draft angle (c), its pitch (P), and its depth (f)).

Selon l'invention, on a voulu améliorer les performances de ces lames de scie à ruban à grumes dans leur application à la première transformation du bois et de ses dérivés, notamment au niveau de l'évacuation des copeaux, des efforts de coupe, des vibrations, des vitesses de coupe, de la fiabilité.According to the invention, it was desired to improve the performance of these log band saw blades in their application to the first transformation of wood and its derivatives, in particular at the level of chip evacuation, cutting forces, vibrations, cutting speeds, reliability.

On connaît par ailleurs par le brevet GB 2113144 une lame de scie à pas variables appliquée à la coupe des matériaux métalliques. L'examen de ce document GB montre que pour améliorer la coupe et réduire les vibrations, la lame de scie proposée vise à mettre en oeuvre une double caractéristique, à savoir que les sommets des différentes dents successives sont établis à des niveaux différents, comme représentés notamment figure 3 des dessins, et par le fait également que les hauteurs de dents (H1), (H2), (H3), (H4), (H5) sont à des hauteurs différentes.Furthermore, GB 2113144 discloses a saw blade with variable pitch applied to the cutting of metallic materials. Examination of this GB document shows that to improve the cut and reduce vibrations, the proposed saw blade aims to implement a double characteristic, namely that the vertices of the different successive teeth are established at different levels, as shown in particular Figure 3 of the drawings, and also by the fact that the heights of teeth (H1), (H2), (H3), (H4), (H5) are at different heights.

Ce document n'est cependant pas applicable à la coupe de grumes pour la première transformation du bois en raison des contraintes différentes dans ce domaine d'application.This document is however not applicable to the cutting of logs for the first transformation of wood because of the different constraints in this field of application.

Selon une première caractéristique de l'invention, la lame de scie à ruban à grumes est constituée d'une succession de modules différents ou identiques, comprenant chacun plusieurs dents (D) de caractéristiques variables déterminées en fonction de tous les critères techniques en présence, et est caractérisée dans son application à la première transformation du bois, et à ce que dans chaque module la partie de la dent se situant en avant du point le plus bas sera de forme variable (FV) et la partie de la dent située en arrière sera de forme constante (FC).According to a first characteristic of the invention, the log band saw blade consists of a succession of different or identical modules, each comprising several teeth (D) of variable characteristics determined as a function of all the technical criteria involved, and is characterized in its application to the first transformation of wood, and in that in each module the part of the tooth located in front of the lowest point will be of variable shape (FV) and the part of the tooth located behind will be of constant form (FC).

Selon une autre caractéristique, le pas de la denture n'est pas constant sur toute la longueur de la lame, mais présente dans chaque module un pas variable de manière croissante ou décroissante.According to another characteristic, the pitch of the toothing is not constant over the entire length of the blade, but has in each module a variable pitch which is increasing or decreasing.

Une autre caractéristique se trouve dans le fait que chaque module est déterminé par un nombre de dents, un pas minimum et maximum, une variation du pas entre chaque dent.Another characteristic is found in the fact that each module is determined by a number of teeth, a minimum and maximum pitch, a variation of the pitch between each tooth.

Ces caractéristiques et d'autres encore ressortiront bien de la description qui suit.These characteristics and others will become apparent from the description which follows.

Pour fixer l'objet de l'invention, sans toutefois le Imiter, dans les schémas annexés :

  • la figure 1 est une vue illustrant les principales caractéristiques d'une denture de lame de scie,
  • les figures 2 à 9 sont des vues illustrant différentes formes de réalisation de la denture selon l'invention.
To fix the object of the invention, without however imitating it, in the attached diagrams:
  • FIG. 1 is a view illustrating the main characteristics of a saw blade toothing,
  • Figures 2 to 9 are views illustrating different embodiments of the teeth according to the invention.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative illustrée aux figures 2 à 9.In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in FIGS. 2 to 9.

La technologie de la denture variable des lames de scie à ruban pour le débit des grumes en vue de la première transformation du bois, peut être mise en oeuvre de différentes manières.The technology of the variable toothing of the bandsaw blades for cutting logs for the first processing of wood can be implemented in different ways.

Par exemple, et comme illustré à la figure 2, la lame (L1) présente un certain nombre de modules (M1, M2...) qui peuvent avoir chacun un nombre de dents (D) variable.For example, and as illustrated in FIG. 2, the blade (L1) has a certain number of modules (M1, M2 ...) which may each have a variable number of teeth (D).

La lame (L2) illustrée à la figure 3 présente entre chaque dent (D) un pas (P1, P2, P3, P4, P5, P6, P7, ...) différent.The blade (L2) illustrated in FIG. 3 has a different pitch (P1, P2, P3, P4, P5, P6, P7, ...) between each tooth (D).

La lame (L3) illustrée à la figure 4 combine des pas (P1....P7) et des modules (M1.....M4) variables.The blade (L3) illustrated in Figure 4 combines steps (P1 .... P7) and variable modules (M1 ..... M4).

La lame (L4) illustrée à la figure 5 est constituée de ,plusieurs modules (M1, M2...) comprenant chacun un nombre de dents (D) de formes identiques, mais proportionnel au pas variable de chaque dent.The blade (L4) illustrated in Figure 5 consists of, several modules (M1, M2 ...) each comprising a number of teeth (D) of identical shapes, but proportional to the variable pitch of each tooth.

La lame (L5) illustrée à la figure 6 est constituée d'une succession de modules identiques (M1, M2, M3) sur toute sa longueur, le module pouvant être constitué par tous les cas de figures énumérés par la présente description.The blade (L5) illustrated in FIG. 6 is made up of a succession of identical modules (M1, M2, M3) over its entire length, the module being able to be constituted by all the cases of figures listed by the present description.

La lame (L6) illustrée à la figure 7 montre un nombre de dents variables par modules. Les dents peuvent être suivant le cas : de forme identique, mais proportionnelle à leur pas ; de forme différente, la forme étant le résultat de la combinaison du mouvement d'une ou de deux cames faisant partie de la cinématique des machines à affuter. D'une manière générale, la partie de la dent se situant en avant du point le plus bas sera de forme variable (FV) et la partie de la dent située en arrière sera de forme constante (FC).The blade (L6) illustrated in Figure 7 shows a number of variable teeth per module. The teeth may be as the case may be: identical in shape, but proportional to their pitch; of different shape, the shape being the result of the combination of the movement of one or two cams forming part of the kinematics of the sharpening machines. Generally, the part of the tooth located in front of the lowest point will be of variable shape (FV) and the part of the tooth located behind will be of constant shape (FC).

La lame (L8) illustrée à la figure 8 est constituée de plusieurs modules avec des dents de profil et forme identiques établies selon une forme constante (FC). lesdites dents étant séparées les unes les autres par un espace variable (FV) grandissant comme illustré par exemple aux dessins.The blade (L8) illustrated in Figure 8 consists of several modules with teeth of identical profile and shape established in a constant shape (FC). said teeth being separated from each other by a variable variable space (FV) growing as illustrated for example in the drawings.

La lame (L9) illustrée à la figure 9 montre des dents (F1, F2, F4, F5, F6) de forme et profil différents.The blade (L9) illustrated in FIG. 9 shows teeth (F1, F2, F4, F5, F6) of different shape and profile.

Dans chaque module groupant un certain nombre de dents, le pas de la denture peut être constant, décroissant ou croissant. Lors de la détermination du ou des modules, les pas des dentures sont ajustés de manière à ce que la longueur de la lame corresponde à la longueur d'une lame standard pour les scies à rubans.In each module grouping a certain number of teeth, the pitch of the toothing can be constant, decreasing or increasing. When determining the module (s), the pitch of the teeth is adjusted so that the length of the blade corresponds to the length of a standard blade for band saws.

La détermination du module prend en compte différents critères techniques tels que les essences de bois, les hauteurs de bois, le matériel de sciage et d'affûtage utilisé, le type de lames utilisées (stellite, écrasée, à pastilles carbure...).The determination of the module takes into account different technical criteria such as the species of wood, the heights of wood, the sawing and sharpening equipment used, the type of blades used (stellite, crushed, with carbide pellets ...).

Les avantages ressortent bien de la description et on souligne encore, dans l'application considérée :

  • la meilleure évacuation des copeaux : en effet, la variation des pas permet de former des copeaux d'épaisseurs variables facilitant leur fragmentation et leur évacuation,
  • les efforts de coupe améliorés par la variation de pas d'une dent à l'autre à l'intérieur d'un même module, du fait que les efforts sont directement proportionnels à l'épaisseur des copeaux,
  • le mode d'excitation vibratoire de la lame est modifié. Le phénomène d'excitation permanente que l'on rencontre sur une lame à pas constant est "brisé" par la variation de pas et donc des efforts et des fréquences d'excitation,
  • la meilleure tenue transversale et longitudinale de la lame, ce qui permet la vitesse de sciage plus élevée, des passes plus profondes et un confort amélioré pour l'utilisateur,
  • la fiabilité importante de la lame de scie qui ne subit pas d'efforts aussi importants qu'une lame classique, ce qui évite au maximum les affûtages ou les changements donc améliore le rendement,
  • la modification du mode d'excitation de la lame entraîne également une diminution sensible du bruit lors du sciage.
The advantages are apparent from the description and it is further emphasized, in the application considered:
  • the best chip evacuation: in fact, the variation of the pitch makes it possible to form chips of variable thicknesses facilitating their fragmentation and their evacuation,
  • the cutting forces improved by the variation in pitch from one tooth to another within the same module, because the forces are directly proportional to the thickness of the chips,
  • the vibration excitation mode of the blade is modified. The phenomenon of permanent excitation which one meets on a plate with constant pitch is "broken" by the variation of pitch and therefore of the forces and frequencies of excitation,
  • better transverse and longitudinal holding of the blade, which allows higher sawing speed, deeper passes and improved comfort for the user,
  • the high reliability of the saw blade, which does not undergo as great a force as a conventional blade, which prevents sharpening or changes as much as possible, thus improving efficiency,
  • changing the excitation mode of the blade also results in a significant reduction in noise during sawing.

Claims (8)

  1. Band-saw blade for trunk wood consisting of a succession of different or identical modules each comprising several teeth (D) with variable characteristics determined according to all the technical criteria present characterised in that it is applied to the first processing of the wood and in that in each module the section of the tooth located to the fore of the lowest point is variable in shape (FV) and the section of the tooth located to the rear is constant in shape (FC).
  2. Band-saw blade for trunk wood as claimed in claim 1 characterised in that the tooth pitch is not constant over the entire length of the blade (L1, L2, L3, etc.) but presents a variable increasing or decreasing pitch (P1, P2, P3, etc.) in each module.
  3. Band-saw blade for trunk wood as claimed in claim 1 characterised in that each module (M1, M2, M3, etc.) is determined by a number of teeth (D), a minimum and maximum pitch and a pitch variation (P1, P2, P3, etc.) between each tooth.
  4. Band-saw blade for trunk wood as claimed in claim 1 characterised in that when a module (M1, M2, M3, etc.) is determined the tooth pitches (P1, P2, P3, etc.) are adjusted such that the length of the blade matches that of a standard blade for band saws.
  5. Band-saw blade for trunk wood as claimed in claim 1 characterised in that it consists of several modules (M1, M2, M3, etc.) each comprising a variable number of teeth (D).
  6. Band-saw blade for trunk wood as claimed in claim 1 characterised in that it consists of several modules (M1, M2, M3, etc.) each comprising a variable number of teeth (D) of different shapes (F1, F2, F3, etc.).
  7. Band-saw blade for trunk wood as claimed in claim 1 characterised in that it consists of several modules (M1, M2, M3, etc.) each comprising a variable number of teeth (D) of different shapes (F1, F2, F3, etc.) and different pitches (P1, P2, P3, etc.).
  8. Band-saw blade for trunk wood as claimed in claim 1 characterised in that the teeth are of different shapes, the shape being the result of the combination of one or two cams belonging to the sharpening machine kinematics.
EP94922279A 1993-07-22 1994-07-20 Log band saw blade for primary wood and wood derivative processing Expired - Lifetime EP0710168B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9309307 1993-07-22
FR9309307A FR2707904B1 (en) 1993-07-22 1993-07-22 Reciprocating or circular band saw blade for working wood and wood products.
PCT/FR1994/000905 WO1995003148A1 (en) 1993-07-22 1994-07-20 Log band saw blade for primary wood and wood derivative processing

Publications (3)

Publication Number Publication Date
EP0710168A1 EP0710168A1 (en) 1996-05-08
EP0710168B1 EP0710168B1 (en) 1997-12-17
EP0710168B2 true EP0710168B2 (en) 2003-01-29

Family

ID=9449728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94922279A Expired - Lifetime EP0710168B2 (en) 1993-07-22 1994-07-20 Log band saw blade for primary wood and wood derivative processing

Country Status (8)

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EP (1) EP0710168B2 (en)
AT (1) ATE161209T1 (en)
CA (1) CA2153872A1 (en)
DE (1) DE69407417T3 (en)
ES (1) ES2113117T3 (en)
FI (1) FI106186B (en)
FR (1) FR2707904B1 (en)
WO (1) WO1995003148A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739074B4 (en) * 1997-09-08 2005-07-07 WIKUS-Sägenfabrik Wilhelm H. Kullmann GmbH & Co. KG Saw blade and method for its production
FR2876617B1 (en) * 2004-10-15 2008-05-30 Psp Ind Sas Soc Par Actions Si PROGRESSIVE AND NOT VARIABLE TOOTH SAW BLADE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191322929A (en) * 1913-10-10 1914-05-21 Albert Rocour Circular Saw Blades for Cutting Metals Cold.
US1328982A (en) * 1919-08-30 1920-01-27 Bert L Calkins Hacksaw-blade
US2351737A (en) * 1940-05-09 1944-06-20 Arthur N Blum Saw
US2568870A (en) * 1945-10-31 1951-09-25 Lerned F Ronan Saw
US4270429A (en) * 1980-01-28 1981-06-02 International Paper Company Attenuated vibration circular saw
JPS58137520A (en) * 1982-01-13 1983-08-16 Amada Co Ltd Band saw blade
US5038653A (en) * 1988-02-02 1991-08-13 The Disston Company Circular saw blade
US5088358A (en) * 1991-03-04 1992-02-18 James Emter Automatic dual-side saw blade grinder having common blade advancement and clamp actuator and method of using same
DE9219128U1 (en) * 1992-01-10 1998-04-16 Kullmann Wikus Saegenfab Saw blade

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
Ersatzteilliste 57 für den Geradschliffautomat CnH" †
Instruzioni per l'uso dell'affilatrice per seghe modello CN/H per affilatura diritta †
Prospectus "Forestill Universal System" †
Prospectus "Original Vollmer Affilatrice automatica per affilatura diritta CnH" †
Prospectus "Original Vollmer Geradschliffautomat CnH" †

Also Published As

Publication number Publication date
FR2707904B1 (en) 1995-09-29
DE69407417T2 (en) 1998-04-09
FI953650A (en) 1995-07-31
EP0710168B1 (en) 1997-12-17
CA2153872A1 (en) 1995-02-02
ES2113117T3 (en) 1998-04-16
ATE161209T1 (en) 1998-01-15
FI106186B (en) 2000-12-15
DE69407417D1 (en) 1998-01-29
WO1995003148A1 (en) 1995-02-02
FR2707904A1 (en) 1995-01-27
EP0710168A1 (en) 1996-05-08
FI953650A0 (en) 1995-07-31
DE69407417T3 (en) 2003-12-24

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