EP0028418B1 - Method and apparatus for sawing stones and marble - Google Patents

Method and apparatus for sawing stones and marble Download PDF

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Publication number
EP0028418B1
EP0028418B1 EP80106772A EP80106772A EP0028418B1 EP 0028418 B1 EP0028418 B1 EP 0028418B1 EP 80106772 A EP80106772 A EP 80106772A EP 80106772 A EP80106772 A EP 80106772A EP 0028418 B1 EP0028418 B1 EP 0028418B1
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EP
European Patent Office
Prior art keywords
inserts
chain
links
axis
cutting
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EP80106772A
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German (de)
French (fr)
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EP0028418A1 (en
Inventor
Jean Perrier
Jacques Perrier
Michel Theveniault
Edouard Kurzawski
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Fernand Perrier & Cie Ets SA
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Fernand Perrier & Cie Ets SA
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Application filed by Fernand Perrier & Cie Ets SA filed Critical Fernand Perrier & Cie Ets SA
Priority to AT80106772T priority Critical patent/ATE6480T1/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
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/124—Saw chains; rod-like saw blades; saw cables
    • B28D1/125—Saw chains; rod-like saw blades; saw cables with exchangeable cutter bits or cutter segments

Definitions

  • the invention relates to a method and a chain for sawing stones or the like according to the respective preambles of claims 1 and 2.
  • wear pads consisting of a tungsten carbide base on which is directly formed, by the application of high pressure and high temperature, a layer of synthetic diamond. Such wear pads give extremely interesting results in the working of metals and even relatively abrasive composite materials.
  • the drill head was provided with helical series of such patches, bonded by brazing at an angle of substantial negative rake of about 15 1 and used with a cutting speed of 30 to 40 m / s as in used for grinding wheels.
  • the object of the invention is to use diamond-tipped carbide wear plates of the preceding type on the links of a chain for cutting stones or marbles while working at a low speed and eliminating the above drawbacks. that is to say in particular the significant wear, overheating and the high cost of restoring the tools.
  • the saw chain shown in fig. 1 is of a conventional design, as well as its drive and its guidance which have not been shown. It includes in particular an alternation of tool-carrying links such as 1 a and 1 b joined together by connecting links 2 in the form of a double yoke of a conventional embodiment.
  • Each of the tool-carrying links is made up of a single piece of steel.
  • this one-piece piece comprises a body 1a, extended at each end by a narrower tab 3a for articulation with the links 2, and surmounted by a cutting head 4a carrying a cutting insert. 5a.
  • This plate 5a has a tungsten carbide base covered on its upper working face by a layer of diamond. It can in particular be constituted by the product manufactured by the General Electric Company and sold under the brand name STRATAPAX. Preferably, a cylindrical shape of revolution is chosen, which allows its mechanical fixing in the head 4a by practicing in the latter a cylindrical counterbore opening at the periphery and in which the plate 5a is exactly embedded, and the latter is found locked in place by a locking plate 6a tightened by a locking screw 7.
  • the links 1b and 1c are identical in all respects to the links 1a except that their plates 5b and 5c are respectively offset slightly to the right for one and to the left for the other.
  • the links 1 d, 1 and 1 f are also identical to the previous ones except that they each have two counterbores to receive two plates respectively 5d to 5f, which are arranged symmetrically and move away from each other gradually while approaching the based.
  • the shape of their heads 4b to 4f and of their clamping plates 6d to 6f naturally evolves accordingly.
  • the nine diamond plates in each sequence of six links are preferably all identical and have been assigned a corresponding index only to refer to their respective positions.
  • each of the nine inserts works only with a limited arc and with a negative cutting angle of 3 to 6 °.
  • This double result is obtained by ensuring that the geometric axis of each insert, that is to say consequently the axis of the corresponding cylindrical counterbore in the head of the corresponding link, meets the axis of the chain, and this at a constant distance from the plate; on the other hand the angle of offset of each of these axes with respect to the previous one around the axis of the chain is also constant.
  • the chain thus formed is driven at a relatively low linear speed of 1.60 to 3 m / s; which consequently requires only a small driving force, with as a consequence a weak heating not requiring only a small quantity of cooling water.
  • this cutting speed and the low negative cutting angle extremely reduced wear is obtained which allows working for whole days without having to stop the saw for restoration.
  • the half-cone of revolution exposed above could have a more flattened configuration in the direction of advance, and be for example semi-elliptical, by distributing the successive spacings of the axes on this cone so as to have arcs cutting lengths of substantially equal length.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Finishing Walls (AREA)
  • Floor Finish (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

1. A method for sawing stone or similar material using a chain saw comprising cutting inserts (5a-5f) of tungsten carbide each fixed by mechanical clamping (6a-6f, 7) in a housing or receptacle with a corresponding cross-section so enabling the insert to be rotated, after being unclamped, through a suitable angle for evening out the wear, characterized in that the chain comprises successive sequences of links each formed by a large number of links (1a, 2, 1b, 2 ... 1f, 2), with the geometrical axes (8a-8f) of these inserts, and therefore of their respective housing, being so positioned as to meet the axis of the chain (9) at a constant distance from the corresponding insert, with each of these axes being angularly offset with respect to the axis of the preceding link by a constant amount round the chain axis, the cutting face or the inserts being coated with synthetic diamond reconstituted in situ by a known method and the inserts being positioned to have a negative cutting angle of 3 to 6 degrees, these inserts having a cylindrical shape of revolution or a polygonal prismatic shape with multiple symmetry.

Description

L'invention concerne un procédé et une chaîne de sciage de pierres ou similaire selon les préambules respectifs des revendications 1 et 2.The invention relates to a method and a chain for sawing stones or the like according to the respective preambles of claims 1 and 2.

Il est connu, notamment d'après les brevets US 3 311 415 (qui décrit les caractéristiques du préambule de la revendication 1 respectivement 2) et FR 1 016 336, d'utiliser une scie à chaîne, mais la chaîne utilisée s'use extrêmement rapidement, même avec des parties coupantes en carbure de tungstène, ce qui oblige constamment à arrêter le travail pour un réaffûtage. Il en résulte une faible productivité et en même temps une grande consommation de plaquettes carbure et de maillons de chaîne sur lesquels ces plaquettes sont en général brasées.It is known, in particular from US Patents 3,311,415 (which describes the characteristics of the preamble of claim 1 respectively 2) and FR 1 016 336, to use a chain saw, but the chain used wears out extremely quickly, even with tungsten carbide cutting parts, which constantly forces you to stop working for resharpening. This results in low productivity and at the same time a high consumption of carbide inserts and chain links on which these inserts are generally brazed.

Il est connu également, en particulier d'après le brevet FR 1 231 267, d'utiliser des outils à concrétion diamantée, constituée le plus souvent par de petits diamants naturels industriels englobés dans une masse de cuivre ou d'un autre métal. Ces outils nécessitent une grande vitesse de rotation et un effort important, par conséquent une grande dépense d'énergie conduisant à un grand échauffement qui exige un refroidissement permanent. De plus, l'usure des outils reste extrêmement importante compte tenu de leur coût élevé.It is also known, in particular from patent FR 1 231 267, to use tools with diamond concretion, most often made up of small natural industrial diamonds embedded in a mass of copper or another metal. These tools require a high speed of rotation and a significant effort, consequently a great expenditure of energy leading to a great heating which requires permanent cooling. In addition, tool wear remains extremely high given their high cost.

Dans l'usinage des métaux, des travaux récents ont permis de mettre au point des plaquettes d'usure constituées par une base en carbure de tungstène sur laquelle est constituée directement, par l'application de haute pression et de haute température, une couche de diamant synthétique. De telles plaquettes d'usure donnent des résultats extrêmement intéressants dans le travail des métaux et même des matériaux composites relativement abrasifs.In metal machining, recent work has made it possible to develop wear pads consisting of a tungsten carbide base on which is directly formed, by the application of high pressure and high temperature, a layer of synthetic diamond. Such wear pads give extremely interesting results in the working of metals and even relatively abrasive composite materials.

On a naturellement essayé d'utiliser ces mêmes plaquettes dans le forage des roches, en particulier pour constituer les trépans de forage. Pour cela la tête de forage était munie de séries hélicoïdales de telles plaquettes, fixées par brasage selon un angle de coupe négatif important de l'ordre de 151 ° et utilisées avec une vitesse de coupe de 30 à 40 m/s comme on en utilise pour les meules.We have naturally tried to use these same plates in the drilling of rocks, in particular to constitute the drill bits. For this purpose the drill head was provided with helical series of such patches, bonded by brazing at an angle of substantial negative rake of about 15 1 and used with a cutting speed of 30 to 40 m / s as in used for grinding wheels.

Le but de l'invention est d'utiliser des plaquettes d'usure en carbure diamanté du type précédent sur les maillons d'une chaîne de coupe de pierres ou marbres tout en travaillant à une faible vitesse et en éliminant les inconvénients précédents, c'est-à-dire en particulier l'usure importante, l'échauffement et le coût élevé de restauration des outils.The object of the invention is to use diamond-tipped carbide wear plates of the preceding type on the links of a chain for cutting stones or marbles while working at a low speed and eliminating the above drawbacks. that is to say in particular the significant wear, overheating and the high cost of restoring the tools.

Ce but est réalisé par les caractéristiques des parties caractérisantes respectifs des revendications 1 et 2.This object is achieved by the characteristics of the respective characterizing parts of claims 1 and 2.

De préférence la chaîne est fait qu'elle comporte des séquences successives de maillons (1 a - 1 f) de forme évolutive et que les axes géométriques (8a - 8f) des diverses plaquettes ou alvéoles, supposés ramenés au niveau d'un même maillon par translation selon l'axe de la chaîne, sont disposés selon des génératrices (8 - 9) régulièrement espacées d'un demi-cône de révolution dont le demi-angle au sommet est égal à l'angle de coupe négative précité de 3 à 6. D'autres particularités de l'invention apparaîtront dans la description qui va suivre d'un mode de réalisation pris comme exemple et représenté sur le dessin annexé, sur lequel:

  • la fig. 1 représente, vu de profil, un fragment de la chaîne de coupe;
  • les fig. 2a à 2f représentent respectivement vu en bout les divers maillons d'une séquence;
  • les fig. 3a à 3f représentent respecitvement ces mêmes maillons vus de dessus;
  • la fig. 4 représente à grande échelle la section du fond du trait de sciage obtenu.
Preferably the chain is made that it comprises successive sequences of links (1 a - 1 f) of progressive shape and that the geometrical axes (8a - 8f) of the various plates or alveoli, supposed to be brought back at the same link by translation along the axis of the chain, are arranged according to generators (8 - 9) regularly spaced by a half-cone of revolution whose half-angle at the top is equal to the aforementioned negative cutting angle of 3 to 6. Other particular features of the invention will appear in the following description of an embodiment taken as an example and shown in the attached drawing, in which:
  • fig. 1 represents, seen in profile, a fragment of the cutting chain;
  • fig. 2a to 2f represent respectively seen at the end the various links of a sequence;
  • fig. 3a to 3f respectively represent these same links seen from above;
  • fig. 4 shows on a large scale the bottom section of the saw cut obtained.

La chaîne de sciage représentée sur la fig. 1 est d'une conception classique, ainsi que son entraînement et son guidage qui n'ont pas été représentés. Elle comporte notamment une alternance de maillons porte-outils tels que 1 a et 1 b réunis entre eux par des maillons de liaison 2 en forme de double chape d'une réalisation classique.The saw chain shown in fig. 1 is of a conventional design, as well as its drive and its guidance which have not been shown. It includes in particular an alternation of tool-carrying links such as 1 a and 1 b joined together by connecting links 2 in the form of a double yoke of a conventional embodiment.

Chacun des maillons porte-outils est constitué par une pièce d'acier monobloc. Par exemple pour le premier maillon d'une séquence cette pièce monobloc comporte un corps 1 a, prolongé à chaque extrémité par une patte plus étroite 3a d'articulation avec les maillons 2, et surmonté par une tête de coupe 4a portant une plaquette de coupe 5a.Each of the tool-carrying links is made up of a single piece of steel. For example, for the first link in a sequence, this one-piece piece comprises a body 1a, extended at each end by a narrower tab 3a for articulation with the links 2, and surmounted by a cutting head 4a carrying a cutting insert. 5a.

Cette plaquette 5a comporte une base en carbure de tungstène recouverte sur sa face supérieure de travail par une couche de diamant. Elle peut en particulier être constituée par le produit fabriqué par la Société General Electric et vendu sous le nom de marque STRATAPAX. On choisit de préférence une forme cylindrique de révolution, ce qui permet sa fixation mécanique dans la tête 4a en pratiquant dans celle-ci un lamage cylindrique débouchant à la périphérie et dans lequel la plaquette 5a vient exactement s'enchâsser, et celle-ci se trouve bloquée en place par une plaque de blocage 6a serrée par une vis de blocage 7.This plate 5a has a tungsten carbide base covered on its upper working face by a layer of diamond. It can in particular be constituted by the product manufactured by the General Electric Company and sold under the brand name STRATAPAX. Preferably, a cylindrical shape of revolution is chosen, which allows its mechanical fixing in the head 4a by practicing in the latter a cylindrical counterbore opening at the periphery and in which the plate 5a is exactly embedded, and the latter is found locked in place by a locking plate 6a tightened by a locking screw 7.

Les maillons 1 b et 1 c sont en tous points identiques aux maillons 1 a sauf que leurs plaquettes 5b et 5c sont respectivement déportées légèrement vers la droite pour l'un et vers la gauche pour l'autre. Enfin, les maillons 1 d, 1 et 1 f sont également identiques aux précédentes sauf qu'ils comportent chacun deux lamages pour recevoir deux plaquettes respectivement 5d à 5f, qui sont disposées symétriquement et vont en s'écartant progressivement tout en se rapprochant de la base. La forme de leurs têtes 4b à 4f et de leurs plaques de serrage 6d à 6f évolue naturellement en conséquence.The links 1b and 1c are identical in all respects to the links 1a except that their plates 5b and 5c are respectively offset slightly to the right for one and to the left for the other. Finally, the links 1 d, 1 and 1 f are also identical to the previous ones except that they each have two counterbores to receive two plates respectively 5d to 5f, which are arranged symmetrically and move away from each other gradually while approaching the based. The shape of their heads 4b to 4f and of their clamping plates 6d to 6f naturally evolves accordingly.

Les neuf plaquettes diamantées de chaque séquence de six maillons sont de préférence toutes identiques et on ne les a affectées d'un indice correspondant que pour faire référence à leurs positions respectives.The nine diamond plates in each sequence of six links are preferably all identical and have been assigned a corresponding index only to refer to their respective positions.

En effet, conformément à l'invention chacune des neuf plaquettes ne travaille que selon un arc limité et avec un angle de coupe négatif de 3 à 6°. Ce double résultat est obtenu en faisant en sorte que l'axe géométrique de chaque plaquette, c'est-à-dire par conséquent l'axe du lamage cylindrique correspondant dans la tête du maillon correspondant, rencontre l'axe de la chaîne, et ceci à une distance constante de la plaquette; d'autre part l'angle de décalage de chacun de ces axes par rapport au précédent autour de l'axe de la chaîne est également constant.Indeed, in accordance with the invention each of the nine inserts works only with a limited arc and with a negative cutting angle of 3 to 6 °. This double result is obtained by ensuring that the geometric axis of each insert, that is to say consequently the axis of the corresponding cylindrical counterbore in the head of the corresponding link, meets the axis of the chain, and this at a constant distance from the plate; on the other hand the angle of offset of each of these axes with respect to the previous one around the axis of the chain is also constant.

Pour mieux comprendre cette géométriel il suffit de supposer par la pensée que l'on superpose géométriquement les six lamages et leurs plaquettes à une même position de maillons par translation le long de l'axe de la chaîne. Dans ce cas, les divers axes 8a à 8f des plaquettes et des lamages, comme représentés sur la fig. 4, sont tous concourants en un point unique 9 situé à une distance du plan commun de coïncidence des diverses plaquettes qui est déterminée de manière que l'angle aigu formé par chacun de ces axes avec l'axe de la chaîne soit égal à l'angle d'incidence négative souhaitée, c'est-à-dire de 3 à 6°. Il en résulte par conséquent que les neuf axes 8a à 8f se trouvent tous disposés selon des génératrices d'un demi-cône de révolution axé sur l'axe de la chaîne. En outre, en vertu de la deuxième condition ces axes sont équidistants sur ce cône.To better understand this geometry, it suffices to assume by thinking that the six countersinks and their plates are geometrically superimposed on the same position of links by translation along the axis of the chain. In this case, the various axes 8a to 8f of the plates and counterbores, as shown in FIG. 4, are all concurrent at a single point 9 located at a distance from the common plane of coincidence of the various plates which is determined so that the acute angle formed by each of these axes with the axis of the chain is equal to the desired negative angle of incidence, i.e. 3 to 6 °. It therefore follows that the nine axes 8a to 8f are all arranged along generators of a half-cone of revolution centered on the axis of the chain. In addition, under the second condition these axes are equidistant on this cone.

Grâce à cela, on obtient comme représenté sur la fig. 4 que les divers arcs 1 Oa à 1 Of, selon lesquels les plaquettes correspondantes 5a à 5f travaillent, sont tous des arcs égaux et de faible étendue régulièrement répartis selon un demi-cercle ondulé. L'ensemble de la figure représente la forme du fond du trait de sciage produit par la scie dans la masse de pierre désignée par 11, l'avance de la scie se faisant naturellement dans le sens de la flèche 12 qui est le plan de circulation de la chaîne de la manière usuelle. Pour cette raison les arcs latéraux 1 Of se prolongent en réalité vers l'arriére par les tangentes 13 parallèles à 12.Thanks to this, we obtain as shown in FIG. 4 that the various arcs 1 Oa to 1 Of, according to which the corresponding plates 5a to 5f work, are all equal arcs of small extent regularly distributed in a wavy semicircle. The whole of the figure represents the shape of the bottom of the saw cut produced by the saw in the mass of stone designated by 11, the advance of the saw taking place naturally in the direction of arrow 12 which is the circulation plane of the chain in the usual way. For this reason the lateral arcs 1 Of actually extend towards the rear by the tangents 13 parallel to 12.

La chaîne ainsi constituée est entraînée à une vitesse linéaire relativement faible de 1,60 à 3 m/s; ce qui nécessite par conséquent qu'une faible force motrice, avec comme conséquence un faible échauffement ne nécessitant qu'une faible quantité d'eau de refroidissement. En outre, grâce à cette vitesse de coupe et à l'angle de coupe négativ faible, on obtient une usure extrêmement réduite qui permet de travailler des journées entières sans avoir à arrêter la scie pour une restauration. Enfin, lorsqu'une telle restauration s'avère nécessaire, il suffit de débloquer les vis de blocage 7a à 7f et de tourner les plaquettes sur elles-mêmes d'un angle réduit correspondant en principe à la longueur commune des arcs 10a à 1 Of. Après reblocage des vis de blocage, la chaîne de sciage peut être réutilisée en réduisant et en espaçant considérablement les temps d'immobilisation, ce qui augmente beaucoup la production, et de ce fait diminue fortement le prix de revient du m2 scié par rapport aux moyens traditionnels.The chain thus formed is driven at a relatively low linear speed of 1.60 to 3 m / s; which consequently requires only a small driving force, with as a consequence a weak heating not requiring only a small quantity of cooling water. In addition, thanks to this cutting speed and the low negative cutting angle, extremely reduced wear is obtained which allows working for whole days without having to stop the saw for restoration. Finally, when such a restoration proves necessary, it suffices to unlock the locking screws 7a to 7f and to turn the plates on themselves by a reduced angle corresponding in principle to the common length of the arcs 10a to 1 Of After re-blocking the locking screws, the saw chain can be reused by reducing and considerably spacing down times, which greatly increases production, and therefore greatly reduces the cost price of m 2 sawn compared by traditional means.

Bien entendu, le même résultat pourrait être si, au lieu d'utiliser une forme entièrement de révolution pour les plaquettes, on leur donnait une forme polygonale ou à symétries multiples, par exemple hexagonale, permettant de les monter dans un certain nombre de positions différentes. Dans ce cas, l'alvéole de logement de chaque plaquette dans les têtes des maillons serait plus délicat à réaliser, mais pourrait être fraisé en bout en utilisant pour les-sommets de la plaquette des angles arrondis d'une manière connue.Of course, the same result could be if, instead of using an entirely revolution shape for the inserts, they were given a polygonal shape or with multiple symmetries, for example hexagonal, allowing them to be mounted in a number of different positions . In this case, the housing of each plate in the heads of the links would be more difficult to produce, but could be milled at the end using rounded corners in a known manner for the apexes of the plate.

En variantes, le demi-cône de révolution exposé plus haut pourrait avoir une configuration plus aplatie dans le sens de l'avance, et être par exemple semi- elliptique, en répartissant les écartements successifs des axes sur ce cône de manière à avoir des arcs de coupe de longueurs sensiblement égales.In variants, the half-cone of revolution exposed above could have a more flattened configuration in the direction of advance, and be for example semi-elliptical, by distributing the successive spacings of the axes on this cone so as to have arcs cutting lengths of substantially equal length.

Claims (3)

1. A method for sawing stone or similar material using a chain saw comprising cutting inserts (5a - 5f) of tungsten carbide each fixed by mechanical clamping (6a - 6f, 7) in a housing or receptacle with a corresponding cross-section so enabling the insert ot be rotated, after being unclamped, through a suitable angle for evening out the wear, characterized in that the chain comprises successive sequences of links each formed by a large number of links (1 a, 2, 1 b, 2 ... 1 f, 2), with the geometrical axes (8a - 8f) of these inserts, and therefore of their respective housing, being so positioned as to meet the axis of the chain (9) at a constant distance from the corresponding insert, with each of these axes being angularly offset with respect to the axis of the preceding link by a constant amount round the chain axis, the cutting face or the inserts being coated with synthetic diamond reconstituted in situ by a known method and the inserts being positioned to have a negative cutting angle of 3 to 6°, these inserts having a cylindrical shape of revolution or a polygonal prismatic shape with multiple symmetries.
2. A saw chain for sawing stone or similar materials for application of the method according to claim 1, and comprising successive links (1 a, 2, 1 b, 2 ... 1 f, 2) some of which at least (1 a - 1 f) carry cutting inserts (5a - 5f), with each of the insert-holder links (1a - 1f) being made in a single syolid piece with a tool-holder head (4a - 4f) in which one or more housings or receptacles are machined designed to take one of the cutting inserts (5a - 5f) and opening out at the edge to clear at leastthe cutting arc of this insert, there being a pressure plate (6a - 6f) and a clamping screw (7) enabling the insert or inserts to be clamped in their receptacle, characterized in that the receptacles have a circular or polygonal shape, with the axes (8a - 8f) of these receptacles meeting the axis (9) of the chain at the above-mentioned negative cutting angle of 3 to 6°.
3. The saw chain according to claim 2, characterized in that it comprises successive sequences of links (1a - 1f) with differing shapes and in that the geometrical axes (8a - 8f) of the various inserts or receptacles, assumed to be referred to the level of the same link by translation along the chain axis, are positioned along regularly spaced generating lines (8 - 9) of a half-cone of revolution having a vertex half- angle which is equal to the above-mentioned negative cutting angle of 3 to 6°.
EP80106772A 1979-11-05 1980-11-04 Method and apparatus for sawing stones and marble Expired EP0028418B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106772T ATE6480T1 (en) 1979-11-05 1980-11-04 METHOD AND DEVICE FOR SAWING STONE AND MARBLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7927255A FR2468452A1 (en) 1979-11-05 1979-11-05 PROCESS AND DEVICE FOR SAWING STONES AND MARBLE
FR7927255 1979-11-05

Publications (2)

Publication Number Publication Date
EP0028418A1 EP0028418A1 (en) 1981-05-13
EP0028418B1 true EP0028418B1 (en) 1984-03-07

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EP80106772A Expired EP0028418B1 (en) 1979-11-05 1980-11-04 Method and apparatus for sawing stones and marble

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EP (1) EP0028418B1 (en)
JP (1) JPS57169310A (en)
AT (1) ATE6480T1 (en)
DE (1) DE3066867D1 (en)
ES (1) ES8107083A1 (en)
FR (1) FR2468452A1 (en)
PT (1) PT72023B (en)

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IT1147600B (en) * 1982-02-08 1986-11-19 Luigi Fantini CUTTING CHAIN FOR MACHINES, FOR CUTTING THE ROCK IN TRAVERTINE QUARRIES OR SIMILAR, WITH REMOVABLE CUTTING TOOLS AND WITH SEVERAL OPERATING POSITIONS
US4827821A (en) * 1986-11-10 1989-05-09 Omark Industries, Inc. Cutting chain
US4945889A (en) * 1987-12-11 1990-08-07 W. F. Myers Company, Inc. Belt-configured saw for cutting slots into stones having a poly-crystalline diamond cutting surface
FR2684371A1 (en) * 1991-11-29 1993-06-04 Alsthom Cge Alcatel PROCESS FOR THE TREATMENT OF A SUPERCONDUCTIVE CERAMIC PART OF TYPE (LN) 1BA2CU307-DELTA.
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ITBS20120099A1 (en) * 2012-06-29 2013-12-30 Apns Di Pasqualato Paolo Mario CUTTING CHAIN FOR STONE MATERIALS
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Also Published As

Publication number Publication date
FR2468452A1 (en) 1981-05-08
PT72023A (en) 1980-12-01
ES497023A0 (en) 1981-10-01
ATE6480T1 (en) 1984-03-15
EP0028418A1 (en) 1981-05-13
DE3066867D1 (en) 1984-04-12
FR2468452B1 (en) 1982-10-22
ES8107083A1 (en) 1981-10-01
PT72023B (en) 1981-12-17
JPS57169310A (en) 1982-10-19

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