EP1304190B1 - Cutting tool for the removal of coatings from mineral substrates - Google Patents

Cutting tool for the removal of coatings from mineral substrates Download PDF

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Publication number
EP1304190B1
EP1304190B1 EP02102442A EP02102442A EP1304190B1 EP 1304190 B1 EP1304190 B1 EP 1304190B1 EP 02102442 A EP02102442 A EP 02102442A EP 02102442 A EP02102442 A EP 02102442A EP 1304190 B1 EP1304190 B1 EP 1304190B1
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EP
European Patent Office
Prior art keywords
segments
grinder according
cutting
concentration
segment
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Expired - Lifetime
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EP02102442A
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German (de)
French (fr)
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EP1304190A1 (en
Inventor
Jean-Pierre Chevalier
François Boland
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Carbodiam SA
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Carbodiam SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D7/066—Grinding blocks; their mountings or supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with cooling provisions

Definitions

  • the present invention relates to cutting tools intended for the removal of coatings deposited on mineral substrates according to the preamble of claim 1.
  • These coatings are especially paints bituminous products based on acryl, latex or epoxy, adhesives for tiling or carpet, plaster or plaster, even projections of flame retardants.
  • EP 0 865 878 and EP 0 865 879 and US 3 745 719 bushel wheels in the shape of a tray or bowl, lined with diamond segments, which in contact with a mineral support, will retain the cutting power until the end of life, revealing during wear and tear successive layers of diamond.
  • the wheels described in EP 0 865 878 and EP 0 865 879, which are considered the closest state of the art, include segments in the form of a circumflex accent with a wing extending substantially following the perimeter of the disc.
  • the application DE-101 39 762.3 discloses a combination of the geometry of a strawberry, capable of a strong removal rate of material and little diamond segments sensitive to wear in contact with the mineral substrate.
  • the strawberry is composed of segments consisting of a hard and thin layer with high concentration of diamond inclined relative to the surface of the mount so to provide a positive cut in the material to be removed and of a support layer, at the back (in relation to the thicker) and at a lower concentration diamond.
  • This segment thus performs the function of removing the coating, considering the ability of the cutting edge to peel it, and this, stably, via a self sharpening mechanism of the hard edge in contact with the mineral substrate, and the polishing function of the substrate by adapting wisely the characteristics of the support layer at a grinding job.
  • a geometrical arrangement adapted to the segments and chip evacuation holes provided in the support of the tool improves the performance of this one, mounted on a rotary grinding machine connected to a vacuum cleaner.
  • the purpose of the present invention is to remedy defects caused by the sense of cutting in passes parallel.
  • Another object of the invention is to avoid wear concentrated at one point abrasive segments.
  • Another object of the invention is to allow a high-performance serial production.
  • Another object of the invention is to guarantee a better job security of the disc.
  • the object of the invention is a surfacing wheel which differs from the closest state of the art in that the segments are arranged according to at least two different provisions so as to present, in the course of cutting process, the cutting edge according to at least four different inclinations.
  • the segments have an inclined cutting face to his basic plan that allows for a positive cut in the direction of the rotating cut in the material to to work.
  • the segments placed according to at least one of the have an inclined cutting face with respect to its basic plan that allows for a positive cut in the sense of cutting down in the material to to work.
  • the segments consist of two layers, the first hard and thin consisting essentially of a metallic binder enclosing fine abrasive grains (such as diamond), the second consisting essentially of a metallic binder enclosing abrasive grains larger than those of the first layer.
  • the first layer has, so advantageous, grains of the order of 0.2 mm in diameter circumscribed in high concentration, of the order of C60 in FEPA concentration.
  • the second layer is advantageously consisting of grains of abrasive of the order 0.6 mm in diameter circumscribed and weaker concentration, of the order of C40 in FEPA concentration.
  • a part segments is arranged with the axis of the tangent profile at circle passing through the tip of the profile and that another part of the segments is arranged with the short flank tangent to the outer circle corresponding to the periphery of the tool.
  • Fig. 1 shows an abrasive segment of the grinding wheel of the invention, in the form of a ploughshare with two flanks respectively long 1 and short 2, consisting of two layers 3 and 4, the face 3 being inclined at an angle at the base plane 6 of the segment.
  • Fig. 2 shows the position of both flanks 1 and 2 relative to the central axis 7 of the segment.
  • Fig. 4 provides a general view of the wheel of the invention, which is composed of a body 10, generally metal and pierced with holes 11, lined with these segments arranged here according to two provisions: four segments 8 (referred to as “working segments”) are arranged with the axis of the profile tangent to the circle passing through the tip of the profile and four segments 9 (designated as name of "boot segments”) whose short flank is tangent to the outer circle corresponding to the periphery of the tool.
  • the direction of rotation is indicated by an arrow 17.
  • Fig. 7 shows the inclination of the cutting edges two successive segments, type 8 and 9, with respect to a circle concentric to the outside diameter of the grinding wheel, that is to say, in relation to the velocity vector of rotation, these angles, designated 12, 13 for a segment placed according to regulation 8 and 14, 15 for a segment placed according to paragraph 9.
  • Fig. 7 shows the inclination of the cutting edges two successive segments, type 8 and 9, with respect to a circle concentric to the outside diameter of the grinding wheel, that is to say, in relation to the velocity vector of rotation, these angles, designated 12, 13 for a segment placed according to regulation 8 and 14, 15 for a segment placed according to paragraph 9.
  • For the understanding of drawing includes indicative numerical values.
  • the grinding wheel and its segments shown in the figures serves to remove coatings on a mineral support (no represent).
  • the segments consist of two layers, one first layer 3 hard and thin usually consists of a metal binder encircling fine diamond grains, the order of 0.2 mm diameter circumscribed in strong concentration, of the order of C60 in FEPA concentration, and a second layer 4 generally consisting of a binder metallic ring enclosing larger diamond grains ( even conventional abrasive), of the order of 0.6 mm circumscribed diameter in lower concentration, the order of C40 in FEPA concentration.
  • the cutting edges of the segment have a tilt (angle 5) to ensure a smooth cut positive, interesting in service because it forces the segment to penetrate the material and to engage the ridge under the coating.
  • the 2 unequal branches 1 and 2 of the segment and their placement under two separate provisions means that, in work, in diving, without advance movement of the machine, the same zone of coating is attacked according to two edges different cuts, which achieves work in passes crossed and promotes fragmentation of the chip; this phenomenon is more marked if the work is carried out "in swallowing "(the usual way of working).
  • By progressing cleared area towards a packed area because relative to a fixed point, it's a total of 4 edges tilt that we will see scroll.
  • Segment layout according to mode 9 a the complementary advantage, in the case of work mode when swallowing, to realize, considering the inclination (angle 5) of segment outward, to make a positive cut interesting in the sense of the working edge, which force the segment to penetrate the material and to engage the edge under the coating. Engagement in the subject is realized along the short edge 2 of a segment placed according to the provision 9 and is not concentrated at one point.
  • the one-piece shape of the segment which cutting edges, is inherently more robust than the combination of small segments placed according to varied orientations because it leads to the use of a smaller number of segments while ensuring at least the same functions.
  • This element is easier to manipulate which allows to automate the manufacturing processes and, given its more large contact area with the wheel support 10, improves the qualities of mechanical strength required by the standard EN 13236.

Abstract

The tool consists of a plate (10) with holes (11) and a series of angled cutting segments, each with a long (1) and a short (2) side and made from two layers (3, 4) of metal containing fine and coarser abrasive particles respectively. The forward-facing side of each segment is inclined at an acute angle (5) to the surface of the plate (10), and the segments are fitted in at least two different positions - one with their points parallel to the periphery of the plate, and the other with their short sides parallel to its edge.

Description

La présente invention concerne les d'outils de coupe destinés à l'enlèvement de revêtements déposés sur des substrats minéraux selon le préambule de la revendication 1.The present invention relates to cutting tools intended for the removal of coatings deposited on mineral substrates according to the preamble of claim 1.

Un tel outil est décrit dans le document EP 0865879.Such a tool is described in EP 0865879.

On rencontre dans le domaine de la construction ou rénovation de bâtiment le problème de l'enlèvement de revêtements peints, projetés ou floqués sur du béton, du ciment ou des appareils de briques ou parpaings.We meet in the field of construction or building renovation the problem of kidnapping painted, projected or flocked coatings on concrete, cement or brick appliances or blocks.

Ces revêtements sont notamment des peintures bitumineuses à base d'acryl, de latex ou d'époxy, des colles pour carrelage ou moquette, des plâtre ou crépi, voire des projections de produits ignifuges.These coatings are especially paints bituminous products based on acryl, latex or epoxy, adhesives for tiling or carpet, plaster or plaster, even projections of flame retardants.

Les techniques d'enlèvement classiques sont lentes et peu productives (travail manuel avec spatule, burin) ou polluantes (utilisation de lessives chimiques) ou encore dommageables pour le substrat (sablage qui dégrade l'état de surface du support du revêtement).Conventional removal techniques are slow and unproductive (manual work with spatula, chisel) or pollutants (use of chemical detergents) or damaging to the substrate (sanding which degrades the condition surface area of the coating support).

On connaít des outils adaptables sur des machines électriques constitués de fraises rotatives disposés sur la face d'un plateau entraíné en rotation par la machine. Les surfaces actives de ces fraises sont affûtées et réalisées le plus souvent en carbure de tungstène. On constate, cependant que l'abrasivité de la plupart des substrats minéraux émousse rapidement le taillant de ces fraisesWe know adaptable tools on machines made of rotating milling cutters arranged on the face of a plate rotated by the machine. The active surfaces of these strawberries are sharpened and realized most often made of tungsten carbide. We aknowledge, however that the abrasiveness of most substrates minerals quickly dulls the pruning of these strawberries

On connaít par EP 0 865 878 et EP 0 865 879 et US 3 745 719 des meules boisseau, en forme de plateau ou de cuvette, garnies de segments diamantés, qui, en contact avec un support minéral, conserveront le pouvoir de coupe jusqu'à la fin de vie, en révélant en cours d'usure des couches successives de diamant. Les meules décrites dans EP 0 865 878 et EP 0 865 879, qui sont considérées comme le plus proche état de la technique, comprennent des segments en forme d'accent circonflexe dont une aile s'étend sensiblement suivant le pourtour du disque.We know EP 0 865 878 and EP 0 865 879 and US 3 745 719 bushel wheels, in the shape of a tray or bowl, lined with diamond segments, which in contact with a mineral support, will retain the cutting power until the end of life, revealing during wear and tear successive layers of diamond. The wheels described in EP 0 865 878 and EP 0 865 879, which are considered the closest state of the art, include segments in the form of a circumflex accent with a wing extending substantially following the perimeter of the disc.

Ces outils sont, en fait destinés au meulage des substrats minéraux, les épaisseurs enlevées par meulage sont de l'ordre du millimètre et la protrusion des grains de l'ordre de quelques dixièmes est adaptée au processus de coupe et ménage un espace suffisant pour l'évacuation des copeaux.These tools are, in fact, intended for grinding mineral substrates, the thicknesses removed by grinding are of the order of a millimeter and the protrusion of grains of the order of a few tenths is adapted to the process of cuts and provides sufficient space for the evacuation of shavings.

Pour des revêtements épais de plusieurs millimètres, parfois constitués de matière présentant des caractéristiques plastiques et se ramollissant au contact d'un outil échauffé par le processus de meulage, cette conception ne convient pas : les segments diamantés ne permettent qu'un faible taux d'enlèvement de matière et celui ci s'effondre rapidement dès que la matière ramollie vient colmater les surfaces actives des segments.For thick coatings of several millimeters, sometimes made of material presenting plastic characteristics and softening on contact of a tool heated by the grinding process, this design is not suitable: diamond segments allow a low rate of material removal and this one collapses quickly as soon as the softened matter closes the active surfaces of the segments.

On connaít par la demande DE-101 39 762.3 une combinaison de la géométrie d'une fraise, capable d'un fort taux d'enlèvement de matière et de segments diamantés peu sensibles à l'usure en contact avec le substrat minéral.The application DE-101 39 762.3 discloses a combination of the geometry of a strawberry, capable of a strong removal rate of material and little diamond segments sensitive to wear in contact with the mineral substrate.

La fraise est composée de segments constitués d'une couche dure et mince à forte concentration de diamant inclinée par rapport à la surface de la monture de manière à ménager une coupe positive dans la matière à enlever et d'une couche de soutien, à l'arrière (par rapport au sens de la coupe) plus épaisse et, à plus faible concentration de diamant.The strawberry is composed of segments consisting of a hard and thin layer with high concentration of diamond inclined relative to the surface of the mount so to provide a positive cut in the material to be removed and of a support layer, at the back (in relation to the thicker) and at a lower concentration diamond.

Ce segment réalise ainsi la fonction d'enlèvement du revêtement, vu la capacité de l'arête de coupe de le peler, et ce, de manière stable, via un mécanisme d'auto affûtage de l'arête dure en contact avec le substrat minéral, et la fonction de polissage du substrat en adaptant judicieusement les caractéristiques de la couche de soutien à un emploi de meulage.This segment thus performs the function of removing the coating, considering the ability of the cutting edge to peel it, and this, stably, via a self sharpening mechanism of the hard edge in contact with the mineral substrate, and the polishing function of the substrate by adapting wisely the characteristics of the support layer at a grinding job.

Une disposition géométrique adaptée des segments et de trous d'évacuation de copeaux prévus dans le support de l'outil améliore les performances de celui ci, monté sur une machine rotative de meulage raccordée à un aspirateur.A geometrical arrangement adapted to the segments and chip evacuation holes provided in the support of the tool improves the performance of this one, mounted on a rotary grinding machine connected to a vacuum cleaner.

La disposition géométrique décrite ci-dessus assure mécaniquement un travail de pelage du revêtement en passes parallèles. Malheureusement, il y aurait intérêt à croiser les passes. En outre, si elle est adaptée au travail en plongée en pleine matière dans le mode usuel de travail, en avalant, c'est-à-dire en progressant avec l'outil, d'une zone déjà débarrassée de son revêtement vers celui ci, seuls les coins extérieurs des segments de périphérie participent au processus de pelage.The geometric arrangement described above ensures mechanically a coat work of coating in passes parallel. Unfortunately, it would be interesting to cross the passes. In addition, if it is suitable for work in diving in full matter in the usual way of working, in swallowing, that is to say, progressing with the tool, a zone already cleared of its coating towards this one, only the outer corners of the edge segments participate in the peeling process.

L'usure y est donc concentrée et, rapidement la fonction essentielle de pelage n'est plus assurée.Wear is therefore concentrated and, quickly, the essential function of peeling is no longer assured.

Par ailleurs, la fabrication industrielle de ces outils est malaisée car le positionnement précis de petits segments en vue de leur association au corps de meule par brasage ou fusion laser se prête mal à des automatisations du procédéMoreover, the industrial manufacture of these tools is difficult because the precise positioning of small segments for their association with the grinding wheel by brazing or laser melting is not easy to automate of the process

Enfin, les impositions de sécurité requises par EN 13236 § 5.5.7 et § 6.5.1 sont difficile à satisfaire vu la petitesse de la surface de contact entre le segment et le corps de meule.Finally, the security charges required by EN 13236 § 5.5.7 and § 6.5.1 are difficult to satisfy given the smallness of the contact area between the segment and the grinding wheel body.

Le but de la présente invention est de remédier aux défauts entraínés par le sens de la coupe en passes parallèles. The purpose of the present invention is to remedy defects caused by the sense of cutting in passes parallel.

Un autre but de l'invention est d'éviter une usure concentrée en un point des segments abrasifs.Another object of the invention is to avoid wear concentrated at one point abrasive segments.

Un autre but de l'invention est de permettre un mode de fabrication en série performant.Another object of the invention is to allow a high-performance serial production.

Un autre but de l'invention est de garantir une meilleure sécurité d'emploi du disque.Another object of the invention is to guarantee a better job security of the disc.

L'objet de l'invention est une meule de surfaçage qui se différencie du plus proche état de la technique en ce que les segments sont disposés selon au moins deux dispositions différentes de façon à présenter , en cours du processus de coupe, l'arête de coupe selon au moins quatre inclinaisons différentes.The object of the invention is a surfacing wheel which differs from the closest state of the art in that the segments are arranged according to at least two different provisions so as to present, in the course of cutting process, the cutting edge according to at least four different inclinations.

Suivant un mode de réalisation avantageux, les segments présentent une face de coupe inclinée par rapport à son plan de base qui permet de ménager une coupe positive dans le sens de la coupe en rotation dans la matière à travailler.According to an advantageous embodiment, the segments have an inclined cutting face to his basic plan that allows for a positive cut in the direction of the rotating cut in the material to to work.

Suivant un mode de réalisation avantageux, les segments placé selon au moins une des dispositions présentent une face de coupe inclinée par rapport à son plan de base qui permet de ménager une coupe positive dans le sens de la coupe en avalant dans la matière à travailler.According to an advantageous embodiment, the segments placed according to at least one of the have an inclined cutting face with respect to its basic plan that allows for a positive cut in the sense of cutting down in the material to to work.

Suivant un mode de réalisation préféré, les segments sont constitués de deux couches, la première dure et fine constituée en substance d'un liant métallique enserrant des grains d'abrasif fins (tels que du diamant), la deuxième constituée en substance d'un liant métallique enserrant des grains d'abrasif plus gros que ceux de la première couche.In a preferred embodiment, the segments consist of two layers, the first hard and thin consisting essentially of a metallic binder enclosing fine abrasive grains (such as diamond), the second consisting essentially of a metallic binder enclosing abrasive grains larger than those of the first layer.

Dans ce cas, la première couche a, de façon avantageuse, des grains de l'ordre de 0.2 mm de diamètre circonscrit en forte concentration, de l'ordre de C60 en concentration FEPA.In this case, the first layer has, so advantageous, grains of the order of 0.2 mm in diameter circumscribed in high concentration, of the order of C60 in FEPA concentration.

De la même façon, la deuxième couche est avantageusement constituée de grains d'abrasif de l'ordre de 0.6 mm de diamètre circonscrit en plus faible concentration, de l'ordre de C40 en concentration FEPA.In the same way, the second layer is advantageously consisting of grains of abrasive of the order 0.6 mm in diameter circumscribed and weaker concentration, of the order of C40 in FEPA concentration.

Suivant un mode de réalisation avantageux, une partie des segments est disposée avec l'axe du profil tangent au cercle passant par la pointe du profil et qu'une autre partie des segments est disposée avec le flanc court tangent au cercle extérieur correspondant à la périphérie de l'outil.According to an advantageous embodiment, a part segments is arranged with the axis of the tangent profile at circle passing through the tip of the profile and that another part of the segments is arranged with the short flank tangent to the outer circle corresponding to the periphery of the tool.

D'autres caractéristiques et avantages de l'invention ressortiront de la description ci-après de modes de réalisation particuliers, référence étant faite aux dessins annexés dans lesquels

  • La fig. 1 est une vue en perspective d'un segment abrasif de la meule de l'invention,
  • La fig. 2 est une vue en plan du segment de la Fig. 1,
  • La fig. 3 est une coupe de ce segment,
  • La fig. 4 est une vue en perspective d'une meule de l'invention,
  • Les fig. 5 et 6 sont des coupes selon un axe passant par deux types de segments de la meule de la fig. 4,
  • La fig. 7 est une vue schématique, en plan, de deux segments successifs de la même meule.
Other features and advantages of the invention will emerge from the following description of particular embodiments, reference being made to the appended drawings in which
  • Fig. 1 is a perspective view of an abrasive segment of the grinding wheel of the invention,
  • Fig. 2 is a plan view of the segment of FIG. 1
  • Fig. 3 is a section of this segment,
  • Fig. 4 is a perspective view of a grinding wheel of the invention,
  • Figs. 5 and 6 are sections along an axis passing through two types of segments of the grinding wheel of FIG. 4
  • Fig. 7 is a schematic plan view of two successive segments of the same wheel.

La fig. 1 montre un segment abrasif de la meule de l'invention, en forme de soc de charrue avec deux flancs respectivement long 1 et court 2, constitué de deux couches 3 et 4 , la face 3 étant inclinée d'un angle 5 par rapport au plan de base 6 du segment.Fig. 1 shows an abrasive segment of the grinding wheel of the invention, in the form of a ploughshare with two flanks respectively long 1 and short 2, consisting of two layers 3 and 4, the face 3 being inclined at an angle at the base plane 6 of the segment.

La fig. 2 montre la position des deux flancs 1 et 2 par rapport à l'axe central 7 du segment.Fig. 2 shows the position of both flanks 1 and 2 relative to the central axis 7 of the segment.

Une coupe (fig. 3) de ce segment, passant par l'axe central 7 où l'on retrouve les deux couches 3 et 4 montre mieux que la face avant de la couche 3 est inclinée suivant un certain angle 16 par rapport au plan de base 6. (Cet angle correspond à la projection orthogonale de l'angle d'inclinaison 5 sur un plan vertical passant par l'axe de symétrie 7)A section (fig 3) of this segment, passing through the axis central 7 where we find the two layers 3 and 4 shows better than the front of layer 3 is inclined next angle 16 relative to the base plane 6. angle is the orthogonal projection of the angle tilt 5 on a vertical plane passing through the axis of symmetry 7)

La fig. 4 offre une vue générale de la meule de l'invention, qui est composée d'un corps 10, généralement métallique et percé de trous 11, garni de ces segments disposé ici selon deux dispositions : quatre segments 8 (désignés sous le nom de « segments de travail ») sont disposés avec l'axe du profil tangent au cercle passant par la pointe du profil et quatre segments 9 (désignés sous le nom de « segments d'amorçage ») dont le flanc court est tangent au cercle extérieur correspondant à la périphérie de l'outil. Le sens de rotation est repéré par une flèche 17.Fig. 4 provides a general view of the wheel of the invention, which is composed of a body 10, generally metal and pierced with holes 11, lined with these segments arranged here according to two provisions: four segments 8 (referred to as "working segments") are arranged with the axis of the profile tangent to the circle passing through the tip of the profile and four segments 9 (designated as name of "boot segments") whose short flank is tangent to the outer circle corresponding to the periphery of the tool. The direction of rotation is indicated by an arrow 17.

Des coupes effectuées suivant les axes AA et BB permettent de mieux se rendre compte de la configuration engendrée par les dispositions différentes des segments 8 et 9.Cutting along the AA and BB axes make it easier to understand the configuration generated by the different provisions of the segments 8 and 9.

La fig. 7 montre l'inclinaison des arêtes de coupe de deux segments successifs, de type 8 et 9, par rapport à un cercle concentrique au diamètre extérieur de la meule, c'est-à-dire en fait par rapport au vecteur vitesse de rotation, ces angles, désignés 12, 13 pour un segment placé selon la disposition 8 et 14, 15 pour un segment placé selon la disposition 9. On a, pour la compréhension du dessin fait figurer des valeurs numériques indicatives.Fig. 7 shows the inclination of the cutting edges two successive segments, type 8 and 9, with respect to a circle concentric to the outside diameter of the grinding wheel, that is to say, in relation to the velocity vector of rotation, these angles, designated 12, 13 for a segment placed according to regulation 8 and 14, 15 for a segment placed according to paragraph 9. For the understanding of drawing includes indicative numerical values.

La meule et ses segments représentés dans les figures sert à enlever des revêtements sur un support minéral (non représenté).The grinding wheel and its segments shown in the figures serves to remove coatings on a mineral support (no represent).

Elle est constituée d'un corps généralement métallique pourvu de trous permettant, au cours de travail l'évacuation des copeaux via un aspirateur non représenté ici. Les segments sont constitués de deux couches, une première couche 3 dure et fine généralement constituée d'un liant métallique enserrant des grains de diamant fins, de l'ordre de 0.2 mm de diamètre circonscrit en forte concentration, de l'ordre de C60 en concentration FEPA, et une deuxième couche 4 généralement constituée d'un liant métallique enserrant des grains de diamant plus gros ( voire d'abrasif conventionnel), de l'ordre de 0.6 mm de diamètre circonscrit en plus faible concentration, de l'ordre de C40 en concentration FEPA.It consists of a generally metallic body provided with holes allowing, during work chip evacuation via a vacuum cleaner, not shown right here. The segments consist of two layers, one first layer 3 hard and thin usually consists of a metal binder encircling fine diamond grains, the order of 0.2 mm diameter circumscribed in strong concentration, of the order of C60 in FEPA concentration, and a second layer 4 generally consisting of a binder metallic ring enclosing larger diamond grains ( even conventional abrasive), of the order of 0.6 mm circumscribed diameter in lower concentration, the order of C40 in FEPA concentration.

Les arêtes de coupe du segment présentent une inclinaison (angle 5) de manière à assurer une coupe positive, intéressante en service car elle force le segment à pénétrer dans la matière et à engager l'arête sous le revêtement.The cutting edges of the segment have a tilt (angle 5) to ensure a smooth cut positive, interesting in service because it forces the segment to penetrate the material and to engage the ridge under the coating.

Les 2 branches inégales 1 et 2 du segment et leur placement selon deux dispositions distinctes font que, en travail, en plongée, sans mouvement d'avance de la machine, une même zone de revêtement est attaquée selon deux arêtes de coupes différentes, ce qui réalise un travail en passes croisées et favorise la fragmentation du copeau; ce phénomène est plus marqué si le travail se réalise « en avalant » (le mode usuel de travail). En progressant d'une zone débarrassée de son revêtement vers une zone garnie car par rapport à un point fixe, c'est un total de 4 arêtes d'inclinaison que l'on verra défiler.The 2 unequal branches 1 and 2 of the segment and their placement under two separate provisions means that, in work, in diving, without advance movement of the machine, the same zone of coating is attacked according to two edges different cuts, which achieves work in passes crossed and promotes fragmentation of the chip; this phenomenon is more marked if the work is carried out "in swallowing "(the usual way of working). By progressing cleared area towards a packed area because relative to a fixed point, it's a total of 4 edges tilt that we will see scroll.

Il va de soi que l'on peut, sur le même outil, combiner des segments suivant plus de deux dispositions angulaires telles que les dispositions 8 et 9It goes without saying that we can, on the same tool, combine segments according to more than two provisions such as paragraphs 8 and 9

La disposition des segments selon le mode 9 a l'avantage complémentaire, dans le cas de mode de travail en avalant, de réaliser, vu l'inclinaison (angle 5) du segment vers l'extérieur, de ménager une coupe positive intéressante dans le sens de l'arête de travail, qui force le segment à pénétrer dans la matière et à engager l'arête sous le revêtement. L'engagement dans la matière se réalise le long de l'arête courte 2 d'un segment placé selon la disposition 9 et n'est pas concentré en un point.Segment layout according to mode 9 a the complementary advantage, in the case of work mode when swallowing, to realize, considering the inclination (angle 5) of segment outward, to make a positive cut interesting in the sense of the working edge, which force the segment to penetrate the material and to engage the edge under the coating. Engagement in the subject is realized along the short edge 2 of a segment placed according to the provision 9 and is not concentrated at one point.

La forme monobloc du segment, qui ménage plusieurs arêtes de coupe, est plus robuste intrinsèquement que la combinaison de petits segments placés selon des orientations variées car elle conduit à l'emploi d'un nombre plus réduit de segments tout en assurant au moins les mêmes fonctions.The one-piece shape of the segment, which cutting edges, is inherently more robust than the combination of small segments placed according to varied orientations because it leads to the use of a smaller number of segments while ensuring at least the same functions.

Cet élément est plus aisé à manipuler ce qui permet d'automatiser les processus de fabrication et, vu sa plus grande surface de contact avec le support de meule 10, améliore les qualités de résistance mécanique requises par la norme EN 13236.This element is easier to manipulate which allows to automate the manufacturing processes and, given its more large contact area with the wheel support 10, improves the qualities of mechanical strength required by the standard EN 13236.

Claims (9)

  1. Cup-shaped surfacing grinder consisting of a body (10) pierced with holes (11) furnished with ploughshare-shaped segments exhibiting two sides (1, 2) relative to the direction of rotation, characterized in that the segments are placed in at least two different dispositions (8, 9) so that, during the cutting process, the cutting edge is exhibited in at least four different inclinations.
  2. Grinder according to Claim 1, characterized in that the segments have a cutting face inclined at an angle (5) relative to its base plane (6) which is used to make a positive cut in the rotary direction of cutting in the material to be worked.
  3. Grinder according to either one of Claims 1 and 2, characterized in that the segments placed in at least one of the dispositions (9) have a cutting face (3) inclined at an angle (5) relative to its base plane (6) which are used to make a positive cut in the direction of cutting while working downwards in the material to be worked.
  4. Grinder according to any one of the preceding claims, characterized in that the segments consist of two layers, the first hard and thin (3) consisting in substance of a metal binding material enclosing fine abrasive granules, the second (4) consisting in substance of a metal binding material enclosing abrasive granules larger than those of the first layer.
  5. Grinder according to Claim 4, characterized in that the abrasive granules are made of diamond.
  6. Grinder according to either one of Claims 4 and 5, characterized in that the first layer has granules of approximately 0.2 mm diameter circumscribed in high concentration, of the order of C60 in FEPA concentration.
  7. Grinder according to any one of Claims 4, 5 and 6, characterized in that the second layer consists of abrasive granules of approximately 0.6 mm diameter circumscribed in lesser concentration, of the order of C40 in FEPA concentration.
  8. Grinder according to any one of the preceding claims, characterized in that a portion of the segments (8) is disposed with the axis of the profile tangential to the circle passing through the vertex of the profile.
  9. Grinder according to any one of the preceding claims, characterized in that another portion of the segments (9) is disposed with the short side tangential to the outer circle corresponding to the periphery of the tool.
EP02102442A 2001-10-19 2002-10-15 Cutting tool for the removal of coatings from mineral substrates Expired - Lifetime EP1304190B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE200100675 2001-10-19
BE2001/0675A BE1014434A3 (en) 2001-10-19 2001-10-19 Design and method of making cutting tool for removing coatings on the mineral substrates.

Publications (2)

Publication Number Publication Date
EP1304190A1 EP1304190A1 (en) 2003-04-23
EP1304190B1 true EP1304190B1 (en) 2005-10-12

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Application Number Title Priority Date Filing Date
EP02102442A Expired - Lifetime EP1304190B1 (en) 2001-10-19 2002-10-15 Cutting tool for the removal of coatings from mineral substrates

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EP (1) EP1304190B1 (en)
AT (1) ATE306365T1 (en)
BE (1) BE1014434A3 (en)
DE (1) DE60206584T2 (en)
DK (1) DK1304190T3 (en)
ES (1) ES2249540T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012009282U1 (en) 2012-09-27 2014-01-22 Heger Gmbh European Diamond Tools Cup grinding wheel
EP2712704A2 (en) 2012-09-27 2014-04-02 ITW Heller GmbH Cup grinding wheel
WO2014105638A1 (en) * 2012-12-31 2014-07-03 Saint-Gobain Abrasives, Inc. Abrasive article having shaped segments

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696805A5 (en) * 2006-04-10 2007-12-14 Toolpower Gmbh Tool for machining surfaces of natural and artificial stone.
DE102013202204A1 (en) * 2013-02-11 2014-08-14 Robert Bosch Gmbh Grinding element for use in grinding disk for sharpening workpiece, has base body whose one base surface is arranged parallel to another base surface, where former base surface comprises partially concave curved side edge
CN115415945B (en) * 2022-09-28 2024-03-19 江苏锋泰工具有限公司 Pure dry diamond grinding disc and manufacturing method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1989215A (en) * 1933-04-25 1935-01-29 Harris Seybold Potter Co Segmental grinding wheel
US5243790A (en) * 1992-06-25 1993-09-14 Abrasifs Vega, Inc. Abrasive member
KR0158750B1 (en) * 1995-06-09 1999-01-15 김수광 Grinding sheet
BE1011027A6 (en) * 1997-02-21 1999-04-06 Carbodiam Abrasive grinding tool and method of design tool.
DE19707445A1 (en) * 1997-02-25 1998-08-27 Hilti Ag Cup-shaped grinding wheel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012009282U1 (en) 2012-09-27 2014-01-22 Heger Gmbh European Diamond Tools Cup grinding wheel
EP2712704A2 (en) 2012-09-27 2014-04-02 ITW Heller GmbH Cup grinding wheel
WO2014105638A1 (en) * 2012-12-31 2014-07-03 Saint-Gobain Abrasives, Inc. Abrasive article having shaped segments
US9149913B2 (en) 2012-12-31 2015-10-06 Saint-Gobain Abrasives, Inc. Abrasive article having shaped segments
US9700993B2 (en) 2012-12-31 2017-07-11 Saint-Gobain Abrasives, Inc. & Saint-Gobain Abrasifs Abrasive article having shaped segments

Also Published As

Publication number Publication date
BE1014434A3 (en) 2003-10-07
DK1304190T3 (en) 2006-02-20
DE60206584T2 (en) 2006-06-29
DE60206584D1 (en) 2006-02-23
ES2249540T3 (en) 2006-04-01
ATE306365T1 (en) 2005-10-15
EP1304190A1 (en) 2003-04-23

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