EP0275860A1 - Saw blade for sawing stone-like material - Google Patents

Saw blade for sawing stone-like material Download PDF

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Publication number
EP0275860A1
EP0275860A1 EP87870203A EP87870203A EP0275860A1 EP 0275860 A1 EP0275860 A1 EP 0275860A1 EP 87870203 A EP87870203 A EP 87870203A EP 87870203 A EP87870203 A EP 87870203A EP 0275860 A1 EP0275860 A1 EP 0275860A1
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EP
European Patent Office
Prior art keywords
blade
slots
sawing
segment
longitudinal edge
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Withdrawn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
EP87870203A
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German (de)
French (fr)
Inventor
Charles Pierre Hallez
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.)
Diamant Boart NV SA
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Diamant Boart NV SA
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Filing date
Publication date
Application filed by Diamant Boart NV SA filed Critical Diamant Boart NV SA
Publication of EP0275860A1 publication Critical patent/EP0275860A1/en
Withdrawn legal-status Critical Current

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    • 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
    • B23D61/123—Details of saw blade body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/127—Straight, i.e. flat, saw blades; strap saw blades

Definitions

  • the present invention relates to an elongate armor blade with reciprocating motion for sawing stony materials, in which a longitudinal edge is provided with abrasive segments or saw teeth spaced therebetween. It is mainly used for sawing stony materials such as granites, porphyries, diorites, etc.
  • German patent application No. 3,413,970 a machine for cutting blocks of hard stony material, comprising at least one armor blade driven by an alternating rectilinear movement combined with a movement of advance in the material to be sawn and an oscillating table capable of supporting the block of stony material.
  • the table rests on mobile supports forced to follow curved trajectories contained in parallel vertical planes.
  • movable supports are either rollers which follow curved guides, or four articulated bars parallel in pairs. They allow the table to oscillate in the work surface of the saw blade.
  • the machine By superimposing a reciprocating movement parallel to the sawing base and of limited amplitude, to the tilting movement of the table, in a vertical plane, the machine achieves a line along the material to be sawn. curved cutting to ensure a limited and effective contact surface.
  • a short contact arc allows, while ensuring a high specific pressure and necessary for sawing on a limited number of diamond segments, to reduce the resulting pressure on the blade to a value such that it no longer generates any deformation or exaggerated twisting of the blade.
  • the blade does not have the same rigidity at the center and at its ends, due to its semi-recessed mounting.
  • European patent application No. 0 039 024 discloses a circular saw designed to saw hard materials.
  • the diameter is generally between 200 and 400 mm.
  • Diamond segments are mounted elastically on the teeth using elastic means, consisting either of a stirrup or of an elongated cut in the form of a circumferential segment formed in the teeth in the vicinity of their base.
  • the present invention relates to an elongated armor blade. Its purpose is to standardize, for each segment, the relative rigidity of the blade. By reducing the rigidity of the blade at the semi-recessed ends, it reduces sudden increases in pressure and hinders the vibrations and twists which are the main causes of deviations.
  • the blade according to the invention is essentially characterized in that it has, in the vicinity of the longitudinal edge provided with segments or saw teeth, elongated slots having an axis substantially parallel to this longitudinal edge, these slots having a length and a position as they correct the differences in stiffness of the blade, relative to each segment position.
  • the slots have a length at least equal to the space between two adjacent sawing segments and extends in the blade between two adjacent segments.
  • the position and the width of a slot of predetermined length determine the rigidity of the flange acting as an elastic stirrup, cut from the core of the saw weave and respectively the maximum length of the stroke carrying out the adjustment of the position of the abrasive segments.
  • the slots extend in the blade from the vicinity of one end, in contact with the blade of a segment, to the vicinity of the opposite end, in contact with the blade, d 'another segment.
  • Figures 4 to 7 are side elevational views of a different embodiment of armor blades.
  • the saw blade designated as a whole by the reference notation 1 comprises a blade proper 2 to which are fixed segments or saw teeth 3.
  • These saw teeth 3 may have the appearance of platelets and may contain as abrasive material diamond, tungsten carbide or silicon. They can be fixed to the support of the blade by welding, by soldering or by mechanical means.
  • the different blades 1 according to the invention shown in FIGS. 4 and 5 have, in the vicinity of a longitudinal edge 4, elongated slots 5 having an axis 6 substantially parallel to the longitudinal edge 4.
  • the slots 5 have a length 1 and a position in the blade 2 such that they standardize the pressure exerted during sawing on several abrasives 3 in contact with the stony material.
  • the saw teeth are distributed along the longitudinal edge 4 of the blade 2 in a substantially homogeneous manner.
  • the blade 2 is subjected to a back-and-forth movement in the direction of the arrows X and to a forward pressure in the stony material in the direction of the arrow Y.
  • the slots 5 have a length 1 decreasing as one approaches the middle of the armor blade. These slots are located in the blade 2 in the vicinity of the longitudinal edge 4 and extend from the vicinity of one end 7 in contact with the blade 2 of a saw segment 3 to the vicinity of the end adjacent 8 in contact with the blade 2, another sawing segment 3 ⁇ .
  • the blade 2 and the slots 5 have a rectangular shape.
  • This blade 2 is stretched by traction at each of its ends before sawing.
  • the slots 5 have a length 1 substantially equal to the distance separating the opposite ends of two successive sawing segments 3 and 3 ⁇ .
  • These slots 5 are located in the blade 2 in the vicinity of the longitudinal edge 4 provided with segments 3, 3 ⁇ , 3 ⁇ etc.
  • FIG. 6 represents a part of a blade 2 of a saw 1.
  • Saw segments 3, 3 ⁇ made of an abrasive material, are fixed to the blade 2 consisting, for example, of a steel sheet 1 to 4 mm thick.
  • the segments may consist of plates having a length 1 of approximately 20 mm, a height of 5 to 6 mm and a thickness of 2 to 6 mm, greater than that of the blade.
  • each of the segments 3, 3 ⁇ there is an adjacent segment located at a distance d1 substantially equal to the length 1 of the segments and another adjacent segment situated at a distance d2 substantially equal to twice the length 1 of the segments.
  • the slots 5 are located in the blade 2 in the vicinity of the longitudinal edge 4 provided with the saw segments and extend between the opposite ends 9, 10 of two adjacent saw segments which are spaced apart from each other by a distance d1 equal to the length of the segments.
  • the slots 5 can for example be located at a distance d3 of approximately 3 to 5 mm from the longitudinal edge 4 and have a width d4 of approximately 1mm.
  • the slots 5, of substantially rectangular shape, are extended at each of their ends by a cutting line 11, having a rounded shape 12 at the end 13 remote from the slot 5.
  • the width of this cutting line is substantially equal to the width d4 of the slot 5 in the vicinity thereof, and becomes progressively but quickly very small, for example equal to 0.1 mm.
  • the slots 5 and the cutting lines are made in the blade 2 by laser cutting.
  • edge 14 of the cutting line 11, adjacent to the longitudinal edge 4 in the vicinity of the slot 5 and the edge 16 of the slot 5, adjacent to the longitudinal edge 4 have tangents 17 common to their contact line 15.
  • the cutting line 11 is substantially parallel to the axis 6 of the latter and ends in a rounded 12 directed towards the edge opposite the longitudinal edge 4 provided with abrasive segments 3.
  • the position of the slot determines for a given width, the stiffness of the flange acting as a stirrup in the annular disc.
  • This stirrup must allow the abrasive segment to adjust according to the variations in the deformation of the blade in line with the segment and in particular to take up the spacings of this deformed blade. In fact, the largest clearances must be taken up at the ends of the armor blade, where the spacing can reach approximately 0.8 mm for a blade length of the order of 3.50 to 4 m.
  • the width of the slot determines the maximum length of the stroke allowing the position of the abrasive segments to be adjusted.
  • the slots 5 make it possible to standardize the pressure exerted on the abrasive segments during sawing. Indeed, when too great pressure is exerted on an abrasive segment 3 instead of being distributed homogeneously over several segments, part of this pressure is used to deform the slots 5 adjacent to this segment 3, these deformations allowing thus reducing an excess of pressure exerted on a segment and distributing the pressure more evenly over several segments.
  • the cutting line 11 located on either side of a slit, attenuates the tensions appearing on the edges of the slit towards the end 13 and the rounding 12 of the cutting line 11.
  • the saw blade according to the invention makes it possible to saw a stony material without pronounced deviation, to obtain a satin-finished cutting section and to allow a better distribution of the pressing pressure of the blade in the stony material.
  • FIG. 7 shows that the laser cuts can be carried out according to a solution called "console”.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The sawing performance and the cutting quality of a saw blade are considerably improved when elongated slots are provided in the vicinity of the longitudinal edge (4) of the blade (1) which make the sawing pressure exerted on the abrasive segments (3) uniform during the sawing. <IMAGE>

Description

La présente invention concerne une lame d'armure de forme allongée à mouvement de va-et-vient pour le sciage de matériaux pierreux, dans laquelle un bord longitudinal est muni de segments abrasifs ou dents de sciage espacés entre eux. Elle est essentiellement utilisée pour le sciage de matériaux pierreux tels que granits, porphyres, diorites, etc.The present invention relates to an elongate armor blade with reciprocating motion for sawing stony materials, in which a longitudinal edge is provided with abrasive segments or saw teeth spaced therebetween. It is mainly used for sawing stony materials such as granites, porphyries, diorites, etc.

On connaît par la demande de brevet allemand No 3.413.970 une machine pour débiter des blocs de matériau pierreux dur, comportant au moins une lame d'armure animée d'un mouvement rectiligne alternatif combiné à un mouvement d'avancement dans le matériau à scier et une table oscillante propre à supporter le bloc de matériau pierreux.We know from German patent application No. 3,413,970 a machine for cutting blocks of hard stony material, comprising at least one armor blade driven by an alternating rectilinear movement combined with a movement of advance in the material to be sawn and an oscillating table capable of supporting the block of stony material.

La table repose sur des appuis mobiles contraints à suivre des trajectoires courbes contenues dans des plans verticaux parallèles.The table rests on mobile supports forced to follow curved trajectories contained in parallel vertical planes.

Ces appuis mobiles sont soit des galets qui suivent des guides courbes, soit quatre barres articulées parallèles deux à deux. Ils permettent à la table d'osciller dans le plan de travail de la lame de sciage.These movable supports are either rollers which follow curved guides, or four articulated bars parallel in pairs. They allow the table to oscillate in the work surface of the saw blade.

Par la superposition d'un mouvement de va-et-­vient parallèle à la base de sciage et d'amplitude limitée, au mouvement de basculement de la table, dans un plan vertical, la machine réalise tout le long du matériau à scier une ligne de coupe courbe propre à assurer une surface de contact restreinte et effective.By superimposing a reciprocating movement parallel to the sawing base and of limited amplitude, to the tilting movement of the table, in a vertical plane, the machine achieves a line along the material to be sawn. curved cutting to ensure a limited and effective contact surface.

Un arc de contact de faible longueur permet, tout en assurant une pression spécifique élevée et nécessaire au sciage sur un nombre restreint de segments diamantés, de réduire la pression résultante sur la lame à une valeur telle qu'elle n'engendre plus aucune déformation ni torsion exagérées de la lame.A short contact arc allows, while ensuring a high specific pressure and necessary for sawing on a limited number of diamond segments, to reduce the resulting pressure on the blade to a value such that it no longer generates any deformation or exaggerated twisting of the blade.

Lorsqu'on applique à la lame une pression d'enfoncement dans le matériau pierreux, cette pression n'est transmise qu'aux seuls segments de sciage en contact avec le matériau pierreux, de sorte que seuls ces segments sont alors utiles au sciage.When applying to the blade a pressing pressure in the stony material, this pressure is transmitted only to the sawing segments in contact with the stony material, so that only these segments are then useful for sawing.

On observe expérimentalement l'apparition de pointes de pression sur les dispositifs de mesure de force montés entre le bloc de matériau pierreux et la table oscillante suivant trois axes orthogonaux.Experimentally, pressure peaks appear on the force measurement devices mounted between the block of stony material and the oscillating table along three orthogonal axes.

Ces variations brutales des pressions de sciage sont essentiellement dues aux écarts importants de déformation du profil de la lame qui se voit soumise à un déplacement continuel de la position de la charge appliquée.These sudden variations in sawing pressures are essentially due to large deviations in deformation of the profile of the blade which is subject to a continuous displacement of the position of the applied load.

De plus, la lame ne présente pas la même rigidité au centre et à ses extrémités, en raison de son montage semi-encastré.In addition, the blade does not have the same rigidity at the center and at its ends, due to its semi-recessed mounting.

Plus le bloc est long, plus les pointes de force sont prononcées.The longer the block, the more pronounced the peaks of force.

Les pointes de pression sont la cause de deux phénomènes que l'on souhaiterait empêcher lors du sciage du matériau pierreux :

  • 1. arrachement d'éclats pierreux sur les chants de la tranche de sciage;
  • 2. la surface de matériaux pierreux mise à jour lors du sciage n'est pas la surface désirée, par suite d'une déformation de la lame et d'une déviation de celle-ci lors du sciage.
Pressure peaks are the cause of two phenomena that we would like to prevent when sawing stony material:
  • 1. tearing of stony chips on the edges of the sawing edge;
  • 2. the surface of stony material uncovered during sawing is not the desired surface, due to a deformation of the blade and a deviation of this during sawing.

On connaît par la demande de brevet européen No 0 039 024, une scie circulaire conçue pour scier des matériaux durs. Le diamètre est généralement compris entre 200 et 400 mm. Des segments diamantés sont montés élastiquement sur les dents à l'aide de moyens élastiques, constitués soit d'un étrier soit d'une découpe allongée en forme de segment circonférentiel ménagée dans les dents au voisinage de leur embase.European patent application No. 0 039 024 discloses a circular saw designed to saw hard materials. The diameter is generally between 200 and 400 mm. Diamond segments are mounted elastically on the teeth using elastic means, consisting either of a stirrup or of an elongated cut in the form of a circumferential segment formed in the teeth in the vicinity of their base.

Ces moyens permettent d'avoir plus de dents en contact avec le matériau pierreux et d'accroître la longévité de la scie en rendant l'usure plus homogène.These means make it possible to have more teeth in contact with the stony material and to increase the longevity of the saw by making the wear more homogeneous.

Ils permettent en outre d'empêcher un échauffement trop important du disque et donc d'un torsionnement du disque lors du brasage de segments diamantés.They also make it possible to prevent excessive heating of the disc and therefore torsion of the disc during the brazing of diamond segments.

Un inconvénient des étriers et des découpes mentionnés ci-dessus consiste dans le danger de rupture de ceux-ci sous l'effet de fatigue, alors que le disque est entraîné à des vitesses de rotation élevées.A disadvantage of the stirrups and the cutouts mentioned above consists in the danger of them breaking under the effect of fatigue, while the disc is driven at high rotational speeds.

Les dents ainsi arrachées risquent alors d'être projetées dans l'espace sous l'effet de la force centrifuge.The teeth thus torn off then risk being thrown into space under the effect of centrifugal force.

La présente invention est relative à une lame d'armure allongée. Elle a pour but d'uniformiser, pour chaque segment, la rigidité relative de la lame. En diminuant la rigidité de la lame aux extrémités semi-encastrées, elle réduit les brusques augmentations de pression et entrave les vibrations et les torsions qui sont les causes principales des déviations.The present invention relates to an elongated armor blade. Its purpose is to standardize, for each segment, the relative rigidity of the blade. By reducing the rigidity of the blade at the semi-recessed ends, it reduces sudden increases in pressure and hinders the vibrations and twists which are the main causes of deviations.

La lame suivant l'invention est essentielle­ment caractérisée en ce qu'elle présente, au voisinage du bord longitudinal muni de segments ou dents de sciage, des fentes allongées ayant un axe sensiblement parallèle à ce bord longitudinal, ces fentes ayant une longueur et une position telles qu'elles corrigent les différences de rigidité de la lame, relative à chaque position de segment.The blade according to the invention is essentially characterized in that it has, in the vicinity of the longitudinal edge provided with segments or saw teeth, elongated slots having an axis substantially parallel to this longitudinal edge, these slots having a length and a position as they correct the differences in stiffness of the blade, relative to each segment position.

Dans une forme de réalisation particulière de la lame, les fentes ont une longueur au moins égale à l'espace entre deux segments de sciage adjacents et s'étend dans la lame entre deux segments adjacents.In a particular embodiment of the blade, the slots have a length at least equal to the space between two adjacent sawing segments and extends in the blade between two adjacent segments.

La position et la largeur d'une fente de longueur prédéterminée, déterminent la rigidité du rebord faisant office d'étrier élastique, découpé dans l'âme de l'armure de sciage et respectivement la longueur maximale de la course réalisant l'ajustement de la position des segments abrasifs.The position and the width of a slot of predetermined length determine the rigidity of the flange acting as an elastic stirrup, cut from the core of the saw weave and respectively the maximum length of the stroke carrying out the adjustment of the position of the abrasive segments.

Suivant une particularité de la lame, les fentes s'étendent dans la lame depuis le voisinage d'une extrémité, en contact avec la lame d'un segment, jusqu'au voisinage de l'extrémité opposée, en contact avec la lame, d'un autre segment.According to a particular feature of the blade, the slots extend in the blade from the vicinity of one end, in contact with the blade of a segment, to the vicinity of the opposite end, in contact with the blade, d 'another segment.

D'autres particularités et détails de l'invention apparaîtront au cours de la description détaillée suivante faisant référence aux dessins annexés illustrant à titre d'exemple des formes de réalisation particulières de l'invention.Other features and details of the invention will appear during the following detailed description referring to the accompanying drawings illustrating by way of example particular embodiments of the invention.

Dans ces dessins :

  • - la figure 1 montre la déformée de la lame, à vide, en absence de bloc à scier. La lame est fléchie par excentration de la résultante de traction par rapport à la fibre neutre;
  • - la figure 2 montre la déformée de la lame avec poussée au milieu de la lame;
  • - la figure 3 représente la déformée de la lame avec poussée du bloc à l'extrémité de la lame;
  • - la figure 4 est une vue en élévation latérale d'une lame d'armure découpée au laser. Les coefficients de raideur des lamelles y sont modifiés en variant la longueur des lamelles en fonction de la position des segments sur la lame;
  • - la figure 5 est une vue en élévation latérale d'une seconde forme de réalisation d'une lame d'armure, dans laquelle le coefficient de raideur des lamelles est modifié en variant l'épaisseur des lamelles;
  • - les figures 6 et 7, sont à plus grande échel­le, des vues en élévation latérale partielles de formes de réalisation d'une lame suivant l'invention.
In these drawings:
  • - Figure 1 shows the deformation of the blade, empty, in the absence of a block to be sawn. The blade is bent by eccentricity of the traction result relative to the neutral fiber;
  • - Figure 2 shows the deformation of the blade with thrust in the middle of the blade;
  • - Figure 3 shows the deformation of the blade with thrust of the block at the end of the blade;
  • - Figure 4 is a side elevational view of a laser cut armor blade. The stiffness coefficients of the slats are modified there by varying the length of the slats as a function of the position of the segments on the blade;
  • - Figure 5 is a side elevational view of a second embodiment of a weave blade, in which the stiffness coefficient of the lamellae is modified by varying the thickness of the lamellae;
  • - Figures 6 and 7, are on a larger scale, partial side elevational views of embodiments of a blade according to the invention.

Les déformées montrées aux figures 1 à 3 et déterminées expérimentalement, démontrent que la raideur de la lame d'armure diffère suivant le point d'application des forces de sciage F.The deformations shown in FIGS. 1 to 3 and determined experimentally, demonstrate that the stiffness of the armor blade differs according to the point of application of the sawing forces F.

Les figures 4 à 7 sont des vues en élévation latérales de forme de réalisation différentes de lames d'armure.Figures 4 to 7 are side elevational views of a different embodiment of armor blades.

Dans ces figures, la lame de scie désignée dans son ensemble par la notation de référence 1 comprend une lame proprement dite 2 à laquelle sont fixés des segments ou dents de sciage 3. Ces dents de sciage 3 peuvent avoir l'aspect de plaquettes et peuvent contenir comme matière abrasive du diamant, du carbure de tungstène ou de silicium. Elles peuvent être fixées au support de la lame par soudage, par brasage ou par des moyens mécaniques.In these figures, the saw blade designated as a whole by the reference notation 1 comprises a blade proper 2 to which are fixed segments or saw teeth 3. These saw teeth 3 may have the appearance of platelets and may contain as abrasive material diamond, tungsten carbide or silicon. They can be fixed to the support of the blade by welding, by soldering or by mechanical means.

Les différentes lames 1 selon l'invention représentées aux figures 4 et 5 présentent au voisinage d'un bord longitudinal 4 des fentes allongées 5 ayant un axe 6 sensiblement parallèle au bord longitudinal 4.The different blades 1 according to the invention shown in FIGS. 4 and 5 have, in the vicinity of a longitudinal edge 4, elongated slots 5 having an axis 6 substantially parallel to the longitudinal edge 4.

Les fentes 5 ont une longueur 1 et une position dans la lame 2 telles qu'elles uniformisent la pression exercée lors du sciage sur plusieurs abrasifs 3 en contact avec le matériaux pierreux.The slots 5 have a length 1 and a position in the blade 2 such that they standardize the pressure exerted during sawing on several abrasives 3 in contact with the stony material.

Les dents de sciage sont réparties le long du bord longitudinal 4 de la lame 2 de façon sensiblement homogène.The saw teeth are distributed along the longitudinal edge 4 of the blade 2 in a substantially homogeneous manner.

La lame 2 est soumise à un mouvement de va-­et-vient dans le sens des flèches X et à une pression d'avancement dans le matériau pierreux dans le sens de la flèche Y.The blade 2 is subjected to a back-and-forth movement in the direction of the arrows X and to a forward pressure in the stony material in the direction of the arrow Y.

A la figure 4, les fentes 5 ont une longueur 1 décroissante au fur et à mesure qu'on se rapproche du milieu de la lame d'armure. Ces fentes sont situées dans la lame 2 au voisinage du bord longitudinal 4 et s'étendent depuis le voisinage d'une extrémité 7 en contact avec la lame 2 d'un segment de sciage 3 jusqu'au voisinage de l'extrémité adjacente 8 en contact avec la lame 2, d'un autre segment de sciage 3ʹ. Dans cette forme de réalisation, la lame 2 et les fentes 5 ont une forme rectangulaire.In Figure 4, the slots 5 have a length 1 decreasing as one approaches the middle of the armor blade. These slots are located in the blade 2 in the vicinity of the longitudinal edge 4 and extend from the vicinity of one end 7 in contact with the blade 2 of a saw segment 3 to the vicinity of the end adjacent 8 in contact with the blade 2, another sawing segment 3ʹ. In this embodiment, the blade 2 and the slots 5 have a rectangular shape.

Cette lame 2 est tendue par traction à chacune de ses extrémités avant un sciage.This blade 2 is stretched by traction at each of its ends before sawing.

A la figure 5, les fentes 5 ont une longueur 1 sensiblement égale à la distance séparant les extrémités opposées de deux segments de sciage successifs 3 et 3ʹ.In FIG. 5, the slots 5 have a length 1 substantially equal to the distance separating the opposite ends of two successive sawing segments 3 and 3ʹ.

Ces fentes 5 sont situées dans la lame 2 au voisinage du bord longitudinal 4 muni des segments 3, 3ʹ, 3ʺ etc.These slots 5 are located in the blade 2 in the vicinity of the longitudinal edge 4 provided with segments 3, 3ʹ, 3ʺ etc.

Lorsque la lame est étirée, le bord longitudinal 4 de la lame 2 est convexe de manière à présenter une flèche.When the blade is stretched, the longitudinal edge 4 of the blade 2 is convex so as to present an arrow.

La figure 6 représente une partie d'une lame 2 d'une scie 1.FIG. 6 represents a part of a blade 2 of a saw 1.

Des segments 3, 3ʹ de sciage en un matériau abrasif, sont fixés à la lame 2 constituée, par exemple, d'une tôle d'acier de 1 à 4 mm d'épaisseur. Les segments peuvent être constitués de plaquettes ayant une longueur 1 d'environ 20 mm, une hauteur de 5 à 6 mm et une épaisseur de 2 à 6 mm, supérieure à celle de la lame.Saw segments 3, 3ʹ made of an abrasive material, are fixed to the blade 2 consisting, for example, of a steel sheet 1 to 4 mm thick. The segments may consist of plates having a length 1 of approximately 20 mm, a height of 5 to 6 mm and a thickness of 2 to 6 mm, greater than that of the blade.

De part et d'autre de chacun des segments 3, 3ʹ, se trouve un segment adjacent situé à une distance d₁ sensiblement égale à la longueur 1 des segments et un autre segment adjacent situé à une distance d₂ sensiblement égale au double de la longueur 1 des segments.On either side of each of the segments 3, 3ʹ, there is an adjacent segment located at a distance d₁ substantially equal to the length 1 of the segments and another adjacent segment situated at a distance d₂ substantially equal to twice the length 1 of the segments.

Les fentes 5 sont situées dans la lame 2 au voisinage du bord longitudinal 4 muni des segments de sciage et s'étendent entre les extrémités 9, 10 opposées de deux segments de sciage adjacents et distants l'un de l'autre d'une distance d₁ égale à la longueur des segments.The slots 5 are located in the blade 2 in the vicinity of the longitudinal edge 4 provided with the saw segments and extend between the opposite ends 9, 10 of two adjacent saw segments which are spaced apart from each other by a distance d₁ equal to the length of the segments.

Les fentes 5 peuvent par exemple, se situer à une distance d₃ d'environ 3 à 5 mm du bord longitudinal 4 et avoir une largeur d₄ d'environ 1mm.The slots 5 can for example be located at a distance d₃ of approximately 3 to 5 mm from the longitudinal edge 4 and have a width d₄ of approximately 1mm.

Les fentes 5, de forme sensiblement rectangulaire, sont prolongées à chacune de leurs extrémités par une ligne de coupe 11, ayant une forme arrondie 12 à l'extrémité 13 éloignée de la fente 5.The slots 5, of substantially rectangular shape, are extended at each of their ends by a cutting line 11, having a rounded shape 12 at the end 13 remote from the slot 5.

La largeur de cette ligne de coupe est sensiblement égale à la largeur d₄ de la fente 5 au voisinage de celle-ci, et devient progressivement mais rapidement très petite, par exemple égale à 0,1 mm.The width of this cutting line is substantially equal to the width d₄ of the slot 5 in the vicinity thereof, and becomes progressively but quickly very small, for example equal to 0.1 mm.

Les fentes 5 et les lignes de coupe sont réalisées dans la lame 2 par découpe au laser.The slots 5 and the cutting lines are made in the blade 2 by laser cutting.

Le bord 14 de la ligne de coupe 11, adjacent au bord longitudinal 4 au voisinage de la fente 5 et le bord 16 de la fente 5, adjacent au bord longitudinal 4 ont des tangentes 17 communes à leur ligne de contact 15.The edge 14 of the cutting line 11, adjacent to the longitudinal edge 4 in the vicinity of the slot 5 and the edge 16 of the slot 5, adjacent to the longitudinal edge 4 have tangents 17 common to their contact line 15.

Au voisinage de la fente, 5, la ligne de coupe 11 est sensiblement parallèle à l'axe 6 de celle-ci et se termine par un arrondi 12 dirigé vers le bord opposé au bord longitudinal 4 muni de segments abrasifs 3.In the vicinity of the slot, 5, the cutting line 11 is substantially parallel to the axis 6 of the latter and ends in a rounded 12 directed towards the edge opposite the longitudinal edge 4 provided with abrasive segments 3.

La position de la fente détermine pour une largeur donnée, la rigidité du rebord faisant office d'étrier dans le disque annulaire.The position of the slot determines for a given width, the stiffness of the flange acting as a stirrup in the annular disc.

Cet étrier doit permettre au segment abrasif de s'ajuster en fonction des variations de la déformation de la lame au droit du segment et en particulier de reprendre les écartements de cette lame déformée. En fait, les jeux les plus importants doivent être repris aux extrémités de la lame d'armure, où l'écartement peut atteindre environ 0,8 mm pour une longueur de lame de l'ordre de 3,50 à 4m.This stirrup must allow the abrasive segment to adjust according to the variations in the deformation of the blade in line with the segment and in particular to take up the spacings of this deformed blade. In fact, the largest clearances must be taken up at the ends of the armor blade, where the spacing can reach approximately 0.8 mm for a blade length of the order of 3.50 to 4 m.

La largeur de la fente détermine la longueur maximale de la course permettant l'ajustement de la position des segments abrasifs.The width of the slot determines the maximum length of the stroke allowing the position of the abrasive segments to be adjusted.

Les fentes 5 permettent d'uniformiser la pression exercée sur les segments abrasifs au cours du sciage. En effet, lorsqu'une pression trop importante est exercée sur un segment abrasif 3 au lieu d'être répartie de façon homogène sur plusieurs segments, une partie de cette pression est utilisée pour déformer les fentes 5 adjacentes à ce segment 3, ces déformations permettant ainsi de diminuer un excès de pression exercée sur un segment et de répartir de façon plus homogène la pression sur plusieurs segments.The slots 5 make it possible to standardize the pressure exerted on the abrasive segments during sawing. Indeed, when too great pressure is exerted on an abrasive segment 3 instead of being distributed homogeneously over several segments, part of this pressure is used to deform the slots 5 adjacent to this segment 3, these deformations allowing thus reducing an excess of pressure exerted on a segment and distributing the pressure more evenly over several segments.

Il est connu que ces fentes ou fissures présentes dans un matériau soumis à des efforts de traction, de compression et/ou de torsion, sont des amorces de ruptures, c'est-à-dire des endroits soumis à une concentration de tensions, et donc sensibles à la propagation des fentes ou fissures dans le matériau, qui peut conduire à plus ou moins grande échéance à la destruction même du matériau.It is known that these slits or cracks present in a material subjected to tensile, compressive and / or torsional forces are primers for ruptures, that is to say places subjected to a concentration of tensions, and therefore sensitive to the propagation of cracks or fissures in the material, which can lead, more or less, to the destruction of the material itself.

La ligne de coupe 11 se trouvant de part et d'autre d'une fente, atténue les tensions apparaissant sur les bords de la fente vers l'extrémité 13 et l'arrondi 12 de la ligne de coupe 11.The cutting line 11 located on either side of a slit, attenuates the tensions appearing on the edges of the slit towards the end 13 and the rounding 12 of the cutting line 11.

Ainsi, si une fissure ou fente doit se propager, elle se forme à l'extrémité 13 de l'arrondi 12 de la ligne de coupe 11 et est dirigée vers un bord de celle-ci. Ce type de propagation des fissures permet d'éviter une destruction de la lame 2 par une fissuration transversale et/ou par une fissu­ration dans un plan sensiblement parallèle aux axes 6 des fentes 5.Thus, if a crack or slot must propagate, it forms at the end 13 of the round 12 of the cutting line 11 and is directed towards an edge thereof. This type of crack propagation makes it possible to avoid destruction of the blade 2 by transverse cracking and / or by cracking in a plane substantially parallel to the axes 6 of the slots 5.

La lame de scie, suivant l'invention, permet de scier un matériau pierreux sans déviation prononcée, d'obtenir une section de coupe satinée et de permettre une meilleure répartition de la pression d'enfoncement de la lame dans le matériau pierreux.The saw blade according to the invention makes it possible to saw a stony material without pronounced deviation, to obtain a satin-finished cutting section and to allow a better distribution of the pressing pressure of the blade in the stony material.

La figure 7 montre que les découpes au laser peuvent être réalisées selon une solution appelée "console".FIG. 7 shows that the laser cuts can be carried out according to a solution called "console".

Il est évident que la présente invention n'est pas limitée aux formes de réalisation décrites ci-dessus et que de nombreuses modifications peuvent être apportées dans la forme, la disposition et la constitution de certains des éléments intervenant dans sa réalisation, à condition que ces modifications ne soient pas en contradiction avec l'objet des revendications suivantes.It is obvious that the present invention is not limited to the embodiments described above and that many modifications can be made in the form, the arrangement and the constitution of some of the elements involved in its realization, provided that these modifications are not inconsistent with the subject matter of the following claims.

Claims (10)

1. Lame (1) d'armure de forme allongée à mouvement de va-et-vient pour le sciage de matériaux pierreux, dans laquelle un bord longitudinal (4) est muni de segments abrasifs ou dents de sciage (3) espacés entre eux, caractérisée en ce que la lame présente au voisinage dudit bord longitudinal (4) des fentes (5) allongées ayant un axe (6) sensiblement parallèle à ce bord longitudinal (4), ces fentes (5) ayant une longueur (1) et une position telles qu'elles uniformisent la pression exercée sur les segments abrasifs (3) au cours du sciage.1. Blade (1) of elongated weave with reciprocating movement for sawing stony materials, in which a longitudinal edge (4) is provided with abrasive segments or saw teeth (3) spaced apart , characterized in that the blade has, in the vicinity of said longitudinal edge (4), elongated slots (5) having an axis (6) substantially parallel to this longitudinal edge (4), these slots (5) having a length (1) and a position such that they uniformize the pressure exerted on the abrasive segments (3) during sawing. 2. Lame (1) suivant la revendication 1, caractérisée en ce que les fentes (5) ont une longueur (1) au moins égale à l'espace (d) entre deux segments (3, 3ʹ) de sciage adjacents et s'étendent dans la lame (2) entre deux segments adjacents (3, 3ʹ).2. Blade (1) according to claim 1, characterized in that the slots (5) have a length (1) at least equal to the space (d) between two adjacent sawing segments (3, 3ʹ) and s' extend in the blade (2) between two adjacent segments (3, 3ʹ). 3. Lame (1) suivant l'une quelconque des revendications 1 et 2, caractérisée en ce que les fentes (5) s'étendent dans la lame (2) depuis le voisinage d'une extrémité (9) d'un premier segment (3) de sciage, en contact avec la lame (2) jusqu'au voisinage de l'extrémité (10) opposée, en contact avec la lame, d'un second segment (3, 3ʺ).3. Blade (1) according to any one of claims 1 and 2, characterized in that the slots (5) extend in the blade (2) from the vicinity of an end (9) of a first segment (3) sawing, in contact with the blade (2) to the vicinity of the opposite end (10), in contact with the blade, of a second segment (3, 3ʺ). 4. Lame (1) suivant la revendication 2, caractérisée en ce que les fentes (5) s'étendent dans la lame (2) depuis le voisinage d'une extrémité (9) d'un premier segment (3) en contact avec la lame de sciage jusqu'au voisinage de l'extrémité opposée (10), en contact avec la lame, d'un second segment adjacent (3ʹ) au premier segment (3).4. Blade (1) according to claim 2, characterized in that the slots (5) extend in the blade (2) from the vicinity of an end (9) of a first segment (3) in contact with the saw blade to the vicinity of the opposite end (10), in contact with the blade, of a second segment adjacent (3ʹ) to the first segment (3). 5. Lame (1) suivant l'une quelconque des revendications précédentes, caractérisée en ce que les fentes (5) se prolongent par une ligne de coupe (11) à au moins une de leurs extrémités de manière à éviter les amorces de rupture.5. Blade (1) according to any one of the preceding claims, characterized in that the slots (5) are extended by a cutting line (11) at at least one of their ends so as to avoid the incipient fractures. 6. Lame (1) suivant la revendication 5, caractérisée en ce que la ligne de coupe (11) présente une partie recourbée sur elle-même (12) à son extrémité éloignée (13) de la fente (5).6. Blade (1) according to claim 5, characterized in that the cutting line (11) has a curved part on itself (12) at its end remote (13) from the slot (5). 7. Lame (1) suivant l'une quelconque des revendications précédentes, caractérisée en ce que l'éloignement de la fente (5) par rapport au bord longitudinal de la lame d'armure, influence la rigidité du support élastique d'un segment abrasif.7. Blade (1) according to any one of the preceding claims, characterized in that the distance of the slot (5) relative to the longitudinal edge of the armor blade, influences the rigidity of the elastic support of a segment abrasive. 8. Lame (1) suivant l'une quelconque des revendications précédentes, caractérisée en ce que la largeur de la fente détermine la course tolérée pour l'ajustement de la position du ou des segments abrasifs au droit de la fente (5).8. Blade (1) according to any one of the preceding claims, characterized in that the width of the slot determines the stroke tolerated for adjusting the position of the abrasive segment (s) in line with the slot (5). 9. Lame (1) suivant la revendication 6, caractérisée en ce que la ligne de coupe (11) présente une partie arrondie à son extrémité éloignée (13) de la fente (5), cette partie arrondie étant dirigée vers le bord longitudinal (4) muni de segments abrasifs (3).9. Blade (1) according to claim 6, characterized in that the cutting line (11) has a rounded part at its remote end (13) from the slot (5), this rounded part being directed towards the longitudinal edge ( 4) provided with abrasive segments (3). 10. Lame suivant l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend une lame de forme allongée à mouvement de va-et-vient pour le sciage de matériaux pierreux dans laquelle un bord longitudinal est muni de segments abrasifs (3) espacés l'un de l'autre, la lame présentant le long du bord longitudinal des fentes (5) ayant un axe (6) sensiblement parallèle à ce bord (4), ces fentes (5) ayant une longueur (1) et une position telles qu'elles uniformisent la pression exercée sur les segments abrasifs (3) au cours du sciage.10. Blade according to any one of the preceding claims, characterized in that it comprises an elongated blade with reciprocating movement for sawing stony materials in which a longitudinal edge is provided with abrasive segments (3 ) spaced from each other, the blade having along the longitudinal edge of the slots (5) having an axis (6) substantially parallel to this edge (4), these slots (5) having a length (1) and a position such that they uniformize the pressure exerted on the abrasive segments (3) during sawing.
EP87870203A 1987-01-08 1987-12-28 Saw blade for sawing stone-like material Withdrawn EP0275860A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700005 1987-01-08
BE8700005A BE1000242A4 (en) 1987-01-08 1987-01-08 Blade armor for cutting materials stone.

Publications (1)

Publication Number Publication Date
EP0275860A1 true EP0275860A1 (en) 1988-07-27

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Application Number Title Priority Date Filing Date
EP87870203A Withdrawn EP0275860A1 (en) 1987-01-08 1987-12-28 Saw blade for sawing stone-like material

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EP (1) EP0275860A1 (en)
BE (1) BE1000242A4 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193280A (en) * 1991-02-25 1993-03-16 Black & Decker, Inc. Saw blades and method of making same
EP0879683A2 (en) * 1997-05-23 1998-11-25 Stalber S.r.l. Diamond type cutting tool, with low noise emission, for sawing stone materials, and machine using said tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039024A1 (en) * 1980-04-25 1981-11-04 BÜDIAM Diamantwerkzeuge W. u. R. Büttner GmbH Saw blade, in particular with diamond-studded cutting segments
DE3229804A1 (en) * 1982-08-11 1984-02-16 Richard Felde Gmbh & Co Kg, 5630 Remscheid Saw blade for gang saws

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039024A1 (en) * 1980-04-25 1981-11-04 BÜDIAM Diamantwerkzeuge W. u. R. Büttner GmbH Saw blade, in particular with diamond-studded cutting segments
DE3229804A1 (en) * 1982-08-11 1984-02-16 Richard Felde Gmbh & Co Kg, 5630 Remscheid Saw blade for gang saws

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193280A (en) * 1991-02-25 1993-03-16 Black & Decker, Inc. Saw blades and method of making same
EP0879683A2 (en) * 1997-05-23 1998-11-25 Stalber S.r.l. Diamond type cutting tool, with low noise emission, for sawing stone materials, and machine using said tool
EP0879683A3 (en) * 1997-05-23 2000-12-20 Stalber S.r.l. Diamond type cutting tool, with low noise emission, for sawing stone materials, and machine using said tool

Also Published As

Publication number Publication date
BE1000242A4 (en) 1988-09-20

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