EP0069106B1 - Machine for sawing stone blocks - Google Patents

Machine for sawing stone blocks Download PDF

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Publication number
EP0069106B1
EP0069106B1 EP82870034A EP82870034A EP0069106B1 EP 0069106 B1 EP0069106 B1 EP 0069106B1 EP 82870034 A EP82870034 A EP 82870034A EP 82870034 A EP82870034 A EP 82870034A EP 0069106 B1 EP0069106 B1 EP 0069106B1
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EP
European Patent Office
Prior art keywords
saw blades
frame
blades
machine according
saw
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Expired
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EP82870034A
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German (de)
French (fr)
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EP0069106A1 (en
Inventor
Gilles Lauga
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.)
Saint Gobain Abrasives Inc
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Norton Co
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Priority to AT82870034T priority Critical patent/ATE10347T1/en
Publication of EP0069106A1 publication Critical patent/EP0069106A1/en
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    • 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
    • B28D1/06—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with reciprocating saw-blades
    • B28D1/066—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with reciprocating saw-blades the workpieces being moved in a horizontal plane, e.g. with vertically or oblique movable saw-blades

Definitions

  • the invention relates to a machine for sawing particularly hard blocks of stone comprising two parallel saw blades stretched on either side of a chassis driven by a substantially vertical oscillating movement.
  • a sawing machine comprising one or more saw blades driven by a rectilinear or oscillating reciprocating movement.
  • the saw blades used are either steel blades sprinkled with water carrying an abrasive such as sand, steel shot, or grains of silicon carbide, or blades with diamond segments.
  • Some of these machines have only one blade driven by an oscillating movement with a horizontal axis, with horizontal advance of the block to be sawed.
  • the saw blade is tensioned in a frame to prevent it from being deflected during sawing. It is advantageous to place the saw blade laterally, so as not to limit the width of the block to be sawed.
  • Machines comprising several saw blades are also known.
  • a machine of this type corresponding to the preamble of claim 1 is described in Belgian patent BE-A-723,034.
  • the various saw blades are stretched parallel in a frame and the latter is driven in an oscillating movement with horizontal axis, with horizontal advance of the block to be sawed.
  • the distance between the blades is chosen so as to saw slices of desired thickness.
  • the obvious advantage of this type of machine is that a series of slices can be sawed in a single sawing operation.
  • the object of the present invention is to remedy the aforementioned drawbacks by producing a sawing machine with two saw blades allowing the simultaneous sawing of two slices of thickness arbitrarily chosen in two independent blocks placed on either side of the machine. This produces a symmetrical, fast and economical machine.
  • Said chassis carries two saw blades arranged on either side thereof, symmetrically and parallel to its plane of symmetry, the fastening parts being arranged overhang on either side of the chassis, and said means of transport are located on either side of said frame and carry adjustment means capable of adjusting the position of the stone blocks.
  • said frame assumes the shape of a right prism with a triangular base formed of metal beams arranged along the edges of said prism and assembled by means known per se; the said horizontal pivot axis is located parallel to and near a prism edge perpendicular to the said triangular base, and the longitudinal axis of each of the two saw blades merges with the plane formed by the face of the prism opposite to the said horizontal pivot axis.
  • a frame guiding device is provided in the vicinity of the saw blades, so as to prevent any lateral deviation of the saw blades.
  • the said guide device consists of metal plates fixed parallel to the planes of the saw blades against a concrete block placed between the saw blades, and the chassis is fitted with rollers located on either side of the block concrete, so as to roll without play on said metal plates.
  • said means capable of animating said chassis with a movement oscillating around said horizontal pivot axis consist of a rod-crank system driven by an electric motor by means of a speed reduction device.
  • the wire of the saw blades comprises diamond segments, and one can advantageously provide for the other edge of each blade a concave curved shape, so as to distribute the tension forces in the blade.
  • said means for fixing the ends of the saw blades to said frame are provided to apply to them tensions in oblique directions relative to the longitudinal axis of the saw blades, in such a way that there appears in each saw blade a tension component perpendicular to the wire of the blades.
  • said means for applying to each saw blade oblique tensions relative to the longitudinal axis of this blade are constituted by a system of adjustable screws and locknuts whose axes are located in the plane of this blade, forming an acute angle towards the outside with the longitudinal axis of the blade.
  • the said means of transport capable of advancing the blocks of stone towards the saw blades consist of two carriages placed on either side of the machine on horizontal rails parallel to the planes of the saw blades, the advance speed of each of the carriages being adjustable.
  • Said means for adjusting the position of the blocks on the transport means are known per se and can advantageously consist of two cylinders integral with said transport means and two measuring fingers.
  • the chassis of the sawing machine shown in FIG. 1 affects the shape of a right prism with a triangular base formed of metal beams 1 to 5 arranged along the edges of said prism and assembled by means known per se.
  • a horizontal pivot axis 6 secured to a bearing 7 and located along an edge of the prism perpendicular to said triangular base of this prism allows the chassis to pivot.
  • the face of the prism opposite to said horizontal pivot axis 6 is provided for carrying two saw blades 8, biconcaves and with diamond segments, situated in two planes perpendicular to said horizontal pivot axis 6 on either side of the chassis.
  • the wire of the two saw blades 8 has an arcuate shape, the center of which coincides with the said horizontal pivot axis 6.
  • Each of the ends of the saw blades 8 is fixed to fixing pieces 9 integral with the ends of the two horizontal crosspieces 4 and 5 forming the edges of the prism opposite and parallel to said horizontal pivot axis 6; the fasteners 9 are themselves arranged cantilevered on either side of the chassis.
  • a system of screws and locknuts 10 mounted on said fixing pieces 9 makes it possible to put the saw blades 8 under tension, by means of connecting members 11 and studs 12, the longitudinal axes of said screws attachment 10 of each blade 8 being located in the plane of this blade by forming with the longitudinal axis of the blade 8 a certain angle towards the outside.
  • the upper horizontal cross member 4 is provided with an anchoring lug to which the upper end of a connecting rod 13 which is part of an alternative drive system comprising an electric motor 14 provided with a pinion 15 is fixed.
  • the arrangement of the bearings 7 and 19, of the crank 18 and of the connecting rod 13 is such that the longitudinal axis of the saws 8 always remains inclined relative to the vertical in the direction opposite to that of the advance.
  • the bearing 7 is placed so that the horizontal pivot axis 6 is located slightly above ground level, and a pit 20 is arranged in the ground between said bearing 7 and the alternative drive system, to allow the lower chassis beams and the lower horizontal crossmember 5 to oscillate freely.
  • means of transport consisting of two horizontal railways 21 parallel to the planes of the saw blades 8 and two carriages 22 capable to each carry a block of stone 23.
  • the sawing machine shown in FIG. 2 comprises a guide device intended to prevent any horizontal movement of the chassis.
  • a concrete block 24 is placed between the metal beams 1 and 2 of the machine, and carries two metal plates 25 on each of its lateral faces.
  • the concrete block is placed as a bridge over the pit 20 so as to provide sufficient space for the lower horizontal cross member 5.
  • rollers 28 are fixed to the vertical beams 1 and 2 by means of supports 29 bolted to the said vertical beams.
  • One of the important advantages provided by the invention resides in the fact that it combines the simplicity and the ease of operation of machines with a single blade with the symmetry and the balancing of the tensions of machines with several blades.
  • the machine according to the invention makes it possible to simultaneously saw two different blocks, of different dimensions, and even of different materials, according to slices of thickness arbitrarily chosen.
  • Another advantage of the invention is that it makes it very easy to modify the thickness of the sawed slices by a simple adjustment of the position of the blocks on the means of transport. In view of the simplicity of this operation for adjusting the thickness of the wafer, slices of any thickness can be sawn economically.

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

Abstract

Machine for stone blocks' sawing. The sawing machine includes a frame mounted in order to pivot around a horizontal axis (6) and wearing two saw blades (8) on each side of this frame, the cutting edge of the blades (8) having an arc shape which center coincides with this horizontal axis (6). Means are provided to animate the frame with an oscillating movement around this horizontal axis (6) and to have a forward movement horizontally of the stone blocks (23) in direction of the saw blades (8). The machine is used for cutting particularly hard stone blocks in slabs (FIG. 1).

Description

L'invention a pour objet une machine pour le sciage de blocs de pierre particulièrement dures comportant deux lames de scie parallèles tendues de part et d'autre d'un châssis animé d'un mouvement oscillant sensiblement vertical.The invention relates to a machine for sawing particularly hard blocks of stone comprising two parallel saw blades stretched on either side of a chassis driven by a substantially vertical oscillating movement.

Pour le sciage de pierres dures telles que les granits, il est connu d'utiliser une machine de sciage comportant une ou plusieurs lames de scie animées d'un mouvement alternatif rectiligne ou oscillant. Les lames de scie utilisées sont soit des lames d'acier arrosées par de l'eau véhiculant un abrasif tel que du sable, de la grenaille d'acier, ou des grains de carbure de silicium, soit des lames à segments diamantés.For sawing hard stones such as granite, it is known to use a sawing machine comprising one or more saw blades driven by a rectilinear or oscillating reciprocating movement. The saw blades used are either steel blades sprinkled with water carrying an abrasive such as sand, steel shot, or grains of silicon carbide, or blades with diamond segments.

Certaines de ces machines ne comportent qu'une seule lame animée d'un mouvement d'oscillation à axe horizontal, avec avance horizontale du bloc à scier. La lame de scie est tendue dans un cadre de manière à l'empêcher de subir des déviations pendant le sciage. Il est avantageux de placer la lame de scie latéralement, de manière à ne pas limiter la largeur du bloc à scier.Some of these machines have only one blade driven by an oscillating movement with a horizontal axis, with horizontal advance of the block to be sawed. The saw blade is tensioned in a frame to prevent it from being deflected during sawing. It is advantageous to place the saw blade laterally, so as not to limit the width of the block to be sawed.

L'inconvénient majeur de ces machines est qu'on ne peut scier qu'une tranche à la fois, ce qui rend l'opération de sciage très lente et coûteuse. Un autre inconvénient provient de la disposition asymétrique de la lame de scie dans le cadre, ce qui produit un mauvais équilibrage des tensions dans la machine et peut dès lors créer des déviations pendant le sciage.The major drawback of these machines is that you can only saw one slice at a time, which makes the sawing operation very slow and expensive. Another disadvantage comes from the asymmetrical arrangement of the saw blade in the frame, which produces poor balancing of the tensions in the machine and can therefore create deviations during sawing.

Des machines comportant plusieurs lames de scie sont également connues. Une machine de ce type correspondant au préambule de la revendication 1 est décrite dans le brevet belge BE-A-723 034. Les diverses lames de scie sont tendues parallèlement dans un cadre et celui-ci est animé d'un mouvement d'oscillation à axe horizontal, avec avance horizontale du bloc à scier. La distance entre les lames est choisie de manière à scier des tranches d'épaisseur voulue. L'avantage évident de ce type de machine est qu'une série de tranches peuvent être sciées en une seule opération de sciage.Machines comprising several saw blades are also known. A machine of this type corresponding to the preamble of claim 1 is described in Belgian patent BE-A-723,034. The various saw blades are stretched parallel in a frame and the latter is driven in an oscillating movement with horizontal axis, with horizontal advance of the block to be sawed. The distance between the blades is chosen so as to saw slices of desired thickness. The obvious advantage of this type of machine is that a series of slices can be sawed in a single sawing operation.

Les inconvénients de ce type de machine sont malheureusement nombreux. En effet, la mise sous tension des lames dans le cadre est une opération longue et laborieuse et il n'est donc pas question de modifier à volonté la distance entre lames. L'épaisseur des tranches sciées ne peut donc pas être réglée en fonction des commandes et l'on doit se contenter d'une épaisseur standard.The disadvantages of this type of machine are unfortunately numerous. Indeed, putting the blades under tension in the frame is a long and laborious operation and there is therefore no question of modifying the distance between blades at will. The thickness of the sawn slices cannot therefore be adjusted according to the orders and one must be satisfied with a standard thickness.

Un autre inconvénient des machines à plusieurs lames de scie provient du cadre dans lequel ces lames sont tendues. Les lames de scie sont en effet comprises dans un cadre généralement rectangulaire au travers duquel le bloc à scier doit nécessairement passer. On voit donc que les dimensions du cadre déterminent celles du bloc. En particulier, la largeur du bloc à scier doit toujours rester inférieure à la largeur intérieure du cadre.Another disadvantage of machines with several saw blades comes from the frame in which these blades are stretched. The saw blades are indeed included in a generally rectangular frame through which the block to be saw must necessarily pass. We therefore see that the dimensions of the frame determine those of the block. In particular, the width of the block to be sawed must always remain less than the interior width of the frame.

Il faut encore noter que ce type de machine à plusieurs lames est d'une construction sophistiquée et est donc d'un coût élevé.It should also be noted that this type of multi-blade machine is of sophisticated construction and is therefore of high cost.

Le but de la présente invention est de remédier aux inconvénients précités en réalisant une machine de sciage à deux lames de scie permettant le sciage simultané de deux tranches d'épaisseur choisie arbitrairement dans deux blocs indépendants placés de part et d'autre de la machine. On réalise de telle sorte une machine symétrique, rapide et économique.The object of the present invention is to remedy the aforementioned drawbacks by producing a sawing machine with two saw blades allowing the simultaneous sawing of two slices of thickness arbitrarily chosen in two independent blocks placed on either side of the machine. This produces a symmetrical, fast and economical machine.

L'objet de l'invention est une machine de sciage pour les pierres comprenant

  • - un châssis monté à pivotement autour d'un axe horizontal, symétrique par rapport à un plan vertical perpendiculaire au dit axe horizontal.
  • - des lames de scie dont le fil, dirigé vers le dit axe horizontal de pivotement, est en forme d'arc de cercle dont le centre coïncide avec le dit axe, ces lames de scie étant fixées par leurs extrémités à des pièces de fixation solidaires du dit châssis et équipées de moyens aptes à fixer les extrémités des lames d scie et à mettre ces dernières sous tension,
  • - des moyens aptes à animer le dit châssis d'un mouvement oscillant autour du dit axe horizontal de pivotement, l'axe longitudinal des lames de scie formant à tout moment un angle aigu par rapport à la verticale,
  • - des moyens de transport, aptes à faire avancer un ou plusieurs blocs de pierre horizontalement et parallèlement aux plans des lames de scie en direction de des dernières.
The object of the invention is a sawing machine for stones comprising
  • - A chassis pivotally mounted about a horizontal axis, symmetrical with respect to a vertical plane perpendicular to said horizontal axis.
  • - saw blades, the wire of which, directed towards the said horizontal pivot axis, is in the form of an arc of a circle, the center of which coincides with the said axis, these saw blades being fixed at their ends to integral fastening parts said chassis and equipped with means capable of fixing the ends of the saw blades and of putting them under tension,
  • means capable of animating the said chassis with an oscillating movement around the said horizontal pivot axis, the longitudinal axis of the saw blades forming at all times an acute angle relative to the vertical,
  • - means of transport, capable of advancing one or more blocks of stone horizontally and parallel to the planes of the saw blades in the direction of the latter.

Le dit châssis porte deux lames de scie disposées de part et d'autre de celui-ci, symétriquement et parallèlement à son plan de symétrie, les pièces de fixation, étant disposées ent porte à faux de part et d'autre du châssis, et les dits moyens de transport sont situés de part d'autre du dit châssis et portent des moyens de réglage aptes à régler la position des blocs de pierre.Said chassis carries two saw blades arranged on either side thereof, symmetrically and parallel to its plane of symmetry, the fastening parts being arranged overhang on either side of the chassis, and said means of transport are located on either side of said frame and carry adjustment means capable of adjusting the position of the stone blocks.

Suivant une forme d'exécution particulière de l'invention, le dit châssis affecte la forme d'un prisme droit à base triangulaire formé de poutrelles métalliques disposées suivant les arêtes du dit prisme et assemblées par des moyens connus en soi; le dit axe horizontal de pivotement est situé parallèlement et à proximité d'une arête de prisme perpendiculaire à la dite base triangulaire, et l'axe longitudinal de chacune des deux lames de scie se confond avec le plan formé par la face du prisme opposée au dit axe horizontal de pivotement.According to a particular embodiment of the invention, said frame assumes the shape of a right prism with a triangular base formed of metal beams arranged along the edges of said prism and assembled by means known per se; the said horizontal pivot axis is located parallel to and near a prism edge perpendicular to the said triangular base, and the longitudinal axis of each of the two saw blades merges with the plane formed by the face of the prism opposite to the said horizontal pivot axis.

Suivant une forme avantageuse de l'invention, un dispositif de guidage du châssis est prévu dans le voisinage des lames de scie, de manière à empêcher toute déviation latérale des lames de scie.According to an advantageous form of the invention, a frame guiding device is provided in the vicinity of the saw blades, so as to prevent any lateral deviation of the saw blades.

Suivant une forme d'exécution préférée de l'invention, le dit dispositiv de guidage est constitué de plaques métalliques fixées parallèlement aux plans des lames de scie contre un massif en béton placé entre les lames de scie, et le châssis est équipé de roulettes situées de part et d'autre du massif en béton, de manière à rouler sans jeu sur les dites plaques métalliques.According to a preferred embodiment of the invention, the said guide device consists of metal plates fixed parallel to the planes of the saw blades against a concrete block placed between the saw blades, and the chassis is fitted with rollers located on either side of the block concrete, so as to roll without play on said metal plates.

Suivant une forme avantageuse de l'invention, les dits moyens aptes à animer le dit châssis d'un mouvement oscillant autour du dit axe horizontal de pivotement sont constitués d'un système bielle-manivelle entraîné par un moteur électrique par l'intermédiaire d'un dispositif réducteur de vitesse.According to an advantageous form of the invention, said means capable of animating said chassis with a movement oscillating around said horizontal pivot axis consist of a rod-crank system driven by an electric motor by means of a speed reduction device.

Suivant une forme avantageuse de l'invention, le fil des lames de scie comporte des segments diamantés, et on peut avantageusement prévoir pour l'autre bord de chaque lame une forme courbe concave, de manière à répartir les efforts de tension dans la lame.According to an advantageous form of the invention, the wire of the saw blades comprises diamond segments, and one can advantageously provide for the other edge of each blade a concave curved shape, so as to distribute the tension forces in the blade.

Conformément à l'invention, les dits moyens permettant de fixer les extrémités des lames de scie au dit châssis sont prévus pour appliquer à celles-ci des tensions suivant des directions obliques par rapport à l'axe longitudinal des lames de scie, de telle manière qu'il apparaît dans chaque lame de scie une composante de tension perpendiculaire au fil des lames.According to the invention, said means for fixing the ends of the saw blades to said frame are provided to apply to them tensions in oblique directions relative to the longitudinal axis of the saw blades, in such a way that there appears in each saw blade a tension component perpendicular to the wire of the blades.

Suivant une forme particulière d'exécution, les dits moyens permettant d'appliquer à chaque lame de scie des tensions obliques par rapport à l'axe longitudinal de cette lame sont constitués par un système de vis et contre-écrous réglables dont les axes sont situés dans le plan de cette lame en formant avec l'axe longitudinal de la lame un angle aigu vers l'extérieur.According to a particular embodiment, said means for applying to each saw blade oblique tensions relative to the longitudinal axis of this blade are constituted by a system of adjustable screws and locknuts whose axes are located in the plane of this blade, forming an acute angle towards the outside with the longitudinal axis of the blade.

Suivant une forme avantageuse de l'invention, les dits moyens de transport aptes à faire avancer les blocs de pierre vers les lames de scie sont constitués de deux chariots placés de part et d'autre de la machine sur des rails horizontaux parallèles aux plans des lames de scie, la vitesse d'avance de chacun des chariots pouvant être réglable.According to an advantageous form of the invention, the said means of transport capable of advancing the blocks of stone towards the saw blades consist of two carriages placed on either side of the machine on horizontal rails parallel to the planes of the saw blades, the advance speed of each of the carriages being adjustable.

Les dits moyens de réglage de la position des blocs sur les moyens de transport sont connus en soi et peuvent avantageusement être constitués de deux vérins solidaires des dits moyens de transport et de deux doigts de mesure.Said means for adjusting the position of the blocks on the transport means are known per se and can advantageously consist of two cylinders integral with said transport means and two measuring fingers.

D'autres caractéristiques et avantages de l'invention ressortiront de la description, donnée à titre d'exemple non limitatif, d'une forme de réalisation particulière de l'invention, référence étant faite aux dessins annexés, dans lesquels:

  • la Fig. 1 est une vue en perspective cavalière d'une machine de sciage suivant l'invention;
  • la Fig. 2 est une vue schématique en élévation d'une machine de sciage comportant un dispositif de guidage;
  • la Fig.3 est une coupe verticale (suivant la ligne III-III de la Fig. 2) de la machine de sciage montrée à la Fig. 2;
  • la Fig. 4 montre un détail de construction du dispositif de guidage tel que représenté à la Fig. 3.
Other characteristics and advantages of the invention will emerge from the description, given by way of nonlimiting example, of a particular embodiment of the invention, reference being made to the appended drawings, in which:
  • Fig. 1 is a perspective view of a sawing machine according to the invention;
  • Fig. 2 is a schematic elevation view of a sawing machine comprising a guide device;
  • Fig.3 is a vertical section (along line III-III of Fig. 2) of the sawing machine shown in Fig. 2;
  • Fig. 4 shows a construction detail of the guide device as shown in FIG. 3.

Sur totes ces figures, des élémentes identiques ou analogues sont désignés par les mêmes chiffres de référence.On these figures, identical or analogous elements are designated by the same reference numbers.

Le châssis de la machine de sciage montrée à la Fig. 1 affecte la forme d'un prisme droit à base triangulaire formé de poutrelles métalliques 1 à 5 disposées suivant les arêtes du dit prisme et assemblées par des moyens connus en soi. Un axe horizontal de pivotement 6 solidaire d'un palier 7 et situé suivant une arête du prisme perpendiculaire à la dite base triangulaire de ce prisme permet le pivotement du châssis.The chassis of the sawing machine shown in FIG. 1 affects the shape of a right prism with a triangular base formed of metal beams 1 to 5 arranged along the edges of said prism and assembled by means known per se. A horizontal pivot axis 6 secured to a bearing 7 and located along an edge of the prism perpendicular to said triangular base of this prism allows the chassis to pivot.

La face du prisme opposée au dit axe horizontal de pivotement 6 est prévue pour porter deux lames de scie 8, biconcaves et à segments diamantés, situées dans deux plans perpendiculaires au dit axe horizontal de pivotement 6 de part et d'autre du châssis.The face of the prism opposite to said horizontal pivot axis 6 is provided for carrying two saw blades 8, biconcaves and with diamond segments, situated in two planes perpendicular to said horizontal pivot axis 6 on either side of the chassis.

Le fil des deux lames de scie 8 a une forme en arc de cercle dont le centre coïncide avec le dit axe horizontal de pivotement 6.The wire of the two saw blades 8 has an arcuate shape, the center of which coincides with the said horizontal pivot axis 6.

Chacune des extrémités des lames de scie 8 est fixée à des pièces de fixation 9 solidaires des extrémités des deux traverses horizontales 4 et 5 formant les arêtes du prisme opposées et parallèles au dit axe horizontal de pivotement 6; les pièces de fixation 9 sont elles-mêmes disposées en porte à faux de part et d'autre du châssis.Each of the ends of the saw blades 8 is fixed to fixing pieces 9 integral with the ends of the two horizontal crosspieces 4 and 5 forming the edges of the prism opposite and parallel to said horizontal pivot axis 6; the fasteners 9 are themselves arranged cantilevered on either side of the chassis.

Un système à vis et contre-écrous 10 monté sur les dites pièces de fixation 9 permet de mettre les lames de scie 8 sous tension, par l'intermédiaire d'organes de liaison 11 et de goujons 12, les axes longitudinaux des dites vis de fixation 10 de chaque lame 8 étant situés dans le plan de cette lame en formant avec l'axe longitudinal de la lame 8 un certain angle vers l'extérieur.A system of screws and locknuts 10 mounted on said fixing pieces 9 makes it possible to put the saw blades 8 under tension, by means of connecting members 11 and studs 12, the longitudinal axes of said screws attachment 10 of each blade 8 being located in the plane of this blade by forming with the longitudinal axis of the blade 8 a certain angle towards the outside.

La traverse horizontale supérieure 4 est munie d'une patte d'ancrage à laquelle est fixée l'extrémité supérieure d'une bielle 13 faisant partie d'un système d'entraînement alternatif comprenant un moteur électrique 14 muni d'un pignon 15, une courroie de transmission 16, un volant 17, une manivelle 18 et un palier 19, l'extrémité inférieure de la bielle 13 étant fixée à l'extrémité de la dite manivelle 18, de sorte que le dit système d'entraînement alternatif est apte à animer le châssis de la machine d'un mouvement oscillant centré autour du dit axe horizontal de pivotement 6.The upper horizontal cross member 4 is provided with an anchoring lug to which the upper end of a connecting rod 13 which is part of an alternative drive system comprising an electric motor 14 provided with a pinion 15 is fixed. transmission belt 16, a flywheel 17, a crank 18 and a bearing 19, the lower end of the connecting rod 13 being fixed to the end of said crank 18, so that said alternative drive system is suitable for animate the machine chassis with an oscillating movement centered around said horizontal pivot axis 6.

La disposition des paliers 7 et 19, de la manivelle 18 et de la bielle 13 est telle que l'axe longitudinal des scies 8 reste toujours incliné par rapport à la verticale en direction contraire à celle de l'avance. Le palier 7 est placé de telle sorte que l'axe horizontal de pivotement 6 est situé légèrement au-dessus du niveau du sol, et une fosse 20 est aménagée dans le sol entre le dit palier 7 et le système d'entraînement alternatif, pour permettre aux poutrelles inférieures du châssis et à la traverse horizontale inférieure 5 d'osciller librement.The arrangement of the bearings 7 and 19, of the crank 18 and of the connecting rod 13 is such that the longitudinal axis of the saws 8 always remains inclined relative to the vertical in the direction opposite to that of the advance. The bearing 7 is placed so that the horizontal pivot axis 6 is located slightly above ground level, and a pit 20 is arranged in the ground between said bearing 7 and the alternative drive system, to allow the lower chassis beams and the lower horizontal crossmember 5 to oscillate freely.

De part et d'autre de la machine sont prévus des moyens de transport constitués de deux voies ferrées 21 horizontales parallèles aux plans des lames de scie 8 et de deux chariots 22 aptes à porter chacun un bloc de pierre 23.On either side of the machine are provided means of transport consisting of two horizontal railways 21 parallel to the planes of the saw blades 8 and two carriages 22 capable to each carry a block of stone 23.

La machine de sciage représentée à la Fig. 2 comporte un dispositif de guidage destiné à empêcher tout mouvement horizontal du châssis. Un massif en béton 24 est placé entre les poutrelles métalliques 1 et 2 de la machine, et porte deux plaques métalliques 25 sur chacune de ses faces latérales. Le massif en béton est placé en pont par-dessus la fosse 20 de manière à ménager un espace suffisant pour la traverse horizontale inférieure 5.The sawing machine shown in FIG. 2 comprises a guide device intended to prevent any horizontal movement of the chassis. A concrete block 24 is placed between the metal beams 1 and 2 of the machine, and carries two metal plates 25 on each of its lateral faces. The concrete block is placed as a bridge over the pit 20 so as to provide sufficient space for the lower horizontal cross member 5.

Comme montré aux Fig. 3 et 4, des roulettes 28 sont fixées aux poutrelles verticales 1 et 2 par l'intermédiaire de supports 29 boulonnés aux dites poutrelles verticales. Un système de réglage horizontal des plaques métalliques 25, constitué de contreécrous 27 réglables sur les goujons filetés 26, permet d'annuler le jeu horizontal entre les plaques métalliques 25 et les roulettes 28.As shown in Figs. 3 and 4, rollers 28 are fixed to the vertical beams 1 and 2 by means of supports 29 bolted to the said vertical beams. A horizontal adjustment system for the metal plates 25, made up of lock nuts 27 adjustable on the threaded studs 26, makes it possible to cancel the horizontal play between the metal plates 25 and the rollers 28.

Un des avantages importants fournis par l'invention réside dans le fait qu'elle allie la simplicité et la facilité d'opération des machines à une seule lame avec la symétrie et l'équilibrage des tensions des machines à plusieurs lames.One of the important advantages provided by the invention resides in the fact that it combines the simplicity and the ease of operation of machines with a single blade with the symmetry and the balancing of the tensions of machines with several blades.

La machine conforme à l'invention permet de scier simultanément deux blocs différents, de dimensions différentes, et même de matières différentes, suivant des tranches d'épaisseur choisie arbitrairement.The machine according to the invention makes it possible to simultaneously saw two different blocks, of different dimensions, and even of different materials, according to slices of thickness arbitrarily chosen.

Un autre avantage de l'invention est qu'elle permet de modifier très facilement l'épaisseur des tranches sciées par un simple réglage de la position des blocs sur les moyens de transport. Vu la simplicité de cette opération de réglage de l'épaisseur de la tranche, on peut scier économiquement des tranches d'épaisseur quelconque.Another advantage of the invention is that it makes it very easy to modify the thickness of the sawed slices by a simple adjustment of the position of the blocks on the means of transport. In view of the simplicity of this operation for adjusting the thickness of the wafer, slices of any thickness can be sawn economically.

La disposition des lames de scie de part et d'autre du châssis permet le sciage de blocs de largeur théoriquement illimitée puisque celle-ci ne dépendra que des moyens de transport et non pas de la largeur entre lames.The arrangement of the saw blades on either side of the frame allows the sawing of blocks of theoretically unlimited width since this will only depend on the means of transport and not on the width between blades.

Claims (10)

1. Machine for sawing stone blocks of the type comprising:
- a frame (1, 2, 3, 4, 5) mounted to pivot about an horizontal axis (6), symmetrical with regard to a vertical plane perpendicular to said horizontal axis (6),
- saw blades (8) the cutting edge of which, directed towards said horizontal pivot axis (6), is in the form of the arc of a circle the centre of which coincides with said axis (6), said saw blades (8) being fixed by their end to securing members (9) which are rigidly connected to said frame (1, 2, 3, 4, 5) and which are provided with means (10, 11, 12) to secure the extremities of the saw blades (8) and to tension said blades (8),
- means for moving said frame (1, 2, 3, 4, 5) with an oscillating motion about said horizontal pivot axis (6), the longitudinal axis of the saw blades (8) always forming an acute angle with regard to the vertical, transport means adapted for moving forward one or several stone blocks (23) horizontally and in a direction parallel to the planes of the saw blades (8) towards said blades (8),

characterised in that said frame (1, 2, 3, 4, 5) carries two saw blades (8) disposed on either side theoref symmetrically and parallely to its symmetrical plane, the securing members (9) being disposed in over-hangig realtionship on either side of the frame (1, 2, 3, 4, 5), and that said transport means are located on either side of said frame (1, 2, 3, 4, 5) and are provided with adjusting means adapted for adjusting the position of the stone blocks.
2. Machine according to claim 1, characterised in that said frame (1, 2, 3, 4, 5) is in the form of a right prism with a triangular base, consisting of metal beams (1, 2, 3, 4, 5) disposed along the edges of said prism and assembled by known means, said horizontal pivot axis (6) being parallel to and near one edge of the prism perpendicular to said triangular base, the longitudinal axis of either of the saw blades (8) being within the plane formed by the face of the prism opposed to said horizontal pivot axis (6).
3. Sawing machine according to any of the preceding claims, characterised in that a guiding means for the frame in provided in the vicinity of the saw blades (8), said guiding means being capable of preventing any lateral deviation of the saw blades (8).
4. Sawing machine according to claim 3, characterised in that the guiding means consists of metal plates (25) secured parallelly to the planes of the saw blades (8) against a concrete block (24) located between the saw blades (8), the frame being provided with rollers (28) which are situated on either side of the concrete block (24) and which roll without clearance on said metal plates (25).
5. Sawing machine according to any of the preceding claims, characterised in that said means for moving said frame with an oscillating motion about said horizontal pivot axis (6) consist of a rod and crank arrangement (13, 18) which is driven by a motor (14) through a speed reducing device (15,16,17).
6. Sawing machine according to any of the preceding claims, characterised in that the cutting edge of the saw blades (8) comprises diamond segments.
7. Sawing machine according to any of the preceding claims, characterised in that the edge of the saw blades (8) which is opposed to the cutting edge thereof has a curved concave configuration.
8. Sawing machine according to any of the preceding claims, characterised in that said means for securing the ends of the saw blades (8) to said frame are adapted for applying tensile stresses to said blades obliquely with respect to the longitudinal axis of the saw blades (8), in an manner such as to induce in each saw blade (8) a tensile component perpendicular to the cutting edge of the blades.
9. Sawing machine according to claim 8, characterised in that said means enabling to apply to each saw blade (8) oblique tensile stresses with respect to the longitudinal axis of this blade are comprised of a screw and adjustable lock-nut arrangement (10), the longitudinal axis of the screw being situated in the plane of said blade (8) and forming with the longitudinal axis of this blade an outwards acute angle.
10. Sawing machine according to any of the preceding claims, characterised in that said transport means adapted for moving the stone blocks towards the saw blades (8) are comprised of two trolleys (22) disposed on either side of the machine on horizontal rails (21) which are parallel to the planes of blades (8), the forward speed of each trolley (22) being adjustable.
EP82870034A 1981-06-19 1982-06-18 Machine for sawing stone blocks Expired EP0069106B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82870034T ATE10347T1 (en) 1981-06-19 1982-06-18 MACHINE FOR SAWING STONE BLOCKS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112132A FR2507951A1 (en) 1981-06-19 1981-06-19 MACHINE FOR SAWING BLOCKS OF STONE
FR8112132 1981-06-19

Publications (2)

Publication Number Publication Date
EP0069106A1 EP0069106A1 (en) 1983-01-05
EP0069106B1 true EP0069106B1 (en) 1984-11-21

Family

ID=9259713

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EP82870034A Expired EP0069106B1 (en) 1981-06-19 1982-06-18 Machine for sawing stone blocks

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US (1) US4474164A (en)
EP (1) EP0069106B1 (en)
AT (1) ATE10347T1 (en)
DE (1) DE3261286D1 (en)
FR (1) FR2507951A1 (en)
IN (1) IN158486B (en)
ZA (1) ZA823647B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3931837C1 (en) * 1989-09-23 1991-03-14 Peter G Werner
DE4140847B4 (en) * 1991-12-11 2005-02-03 Black & Decker Inc., Newark Powered saw
US20040112359A1 (en) * 1997-04-04 2004-06-17 Chien-Min Sung Brazed diamond tools and methods for making the same
US8261455B2 (en) * 2007-01-24 2012-09-11 Henrickson Erik P Reciprocating tool
CN101767374B (en) * 2010-02-22 2012-06-06 林天华 Horizontally-moving seesaw-type stone saw frame
WO2015067213A1 (en) * 2013-11-08 2015-05-14 昆山圣进威精密机械有限公司 Dragsaw

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE723034A (en) * 1968-10-28 1969-04-28

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US1538512A (en) * 1919-07-05 1925-05-19 Lane Mfg Company Reciprocating sawing machine
FR1196676A (en) * 1958-06-05 1959-11-25 Hyresgaesternas Sparkasse Och Method and machine for sawing stone
CH497256A (en) * 1968-10-28 1970-10-15 Egleme Paul Reciprocating saw blade
NL6915839A (en) * 1968-10-28 1970-05-01
DE2306877A1 (en) * 1973-02-13 1974-08-29 Ernst Spielvogel MACHINING TOOLS FOR LARGER BLOCKS

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
BE723034A (en) * 1968-10-28 1969-04-28

Also Published As

Publication number Publication date
ATE10347T1 (en) 1984-12-15
FR2507951B1 (en) 1984-09-14
EP0069106A1 (en) 1983-01-05
DE3261286D1 (en) 1985-01-03
ZA823647B (en) 1983-03-30
FR2507951A1 (en) 1982-12-24
US4474164A (en) 1984-10-02
IN158486B (en) 1986-11-22

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