EP0794850A1 - Outil abrasif, de coupe ou analogue et procede de fabrication de cet outil - Google Patents
Outil abrasif, de coupe ou analogue et procede de fabrication de cet outilInfo
- Publication number
- EP0794850A1 EP0794850A1 EP95936389A EP95936389A EP0794850A1 EP 0794850 A1 EP0794850 A1 EP 0794850A1 EP 95936389 A EP95936389 A EP 95936389A EP 95936389 A EP95936389 A EP 95936389A EP 0794850 A1 EP0794850 A1 EP 0794850A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- tool according
- diamond grains
- tool
- grains
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
- B24D5/12—Cut-off wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
Definitions
- the present invention relates to an abrasive tool for cutting, drilling or grinding building materials comprising a support associated with or provided with a structure, positioning diamond grains.
- the known abrasive or cutting tool of the aforementioned type when it is a cutting disc, consists of a circular support of sheet steel and a metallic structure formed by a succession of segments, teeth or a continuous rim or diamond crown fixed, for example, by brazing, welding or sintering on the periphery of this sheet.
- the metal structure consists of a body sintered by powder metallurgy incorporating the diamond grains. In the construction applications targeted by the present invention, these grains generally have a size ranging from 20 to 80 US-MESH (standard ISO 6106 / FEPA or ANSI B74-16).
- abrasive particles In the case of discs, abrasive particles, generally formed of silicon carbide, extend over the entire surface of the disc and are incorporated in a phenolic resin reinforced with synthetic fibers.
- these discs have the drawback that the abrasive part is very weak and wears out quickly.
- the diameter of such a disc rapidly decreases during use and therefore requires frequent replacement during relatively intensive use.
- the grain-bearing structure only exists virtually.
- the diamond grains have been previously coated with a microscopic layer of nickel of maximum 20 microns having the particularity of better adhering to said resin. Therefore, a lattice-like structure is not necessary.
- This design remains limited to tools exclusively for grinding or grinding, where the friction forces transmitted in diamond remain well below the forces generally encountered during sawing.
- the grain size is less than 200 microns and is commonly between 100 and 400 US-MESH.
- One of the essential aims of the present invention is to remedy the drawbacks of these types of known abrasive tools and to present an abrasive, cutting or similar tool which may be suitable both for intensive use and for relatively infrequent use, in particular thanks to its relatively low manufacturing price compared to its lifespan, which also provides the user with performance and safety, especially when this tool is used dry.
- the invention allows the user to have an abrasive tool continuously having a substantially constant depth of cut.
- the support essentially consists of a body molded, cast, injected or pressed from a material having a melting point above the temperature of use and below 1000 ° C and incorporating a structure device itself carrying and positioning the abrasive diamond grains. These are at least distributed in the direction in which the tool must be applied to the material to be worked, the structure having open spaces, recesses or pores and being at least partially embedded in the aforementioned material, which penetrates at least partially in these interstices so as to allow the structure to be secured to the support and to transmit a torque from a motorized axis.
- the diamond grains advantageously have a size between 20 and 80 US-MESH and preferably between
- the aforementioned structure comprises an assembly of particles each formed by grains of diamonds coated with a connecting envelope, these particles being fixed, directly or not, to each other in such a way as to leave between them interstices in which penetrates the aforementioned material to form an anchorage with the aforementioned support.
- Figure 1 is a side view of a known diamond disc.
- Figure 2 is, on a larger scale, a similar side view of part of the periphery of the disc shown in Figure 1.
- Figure 3 is a side view of an abrasive disc according to a first embodiment of the invention.
- Figure 4 is, on a larger scale, a similar view of a portion of the peripheral edge of this first embodiment in which the material constituting the support of the disc has been omitted.
- Figure 5 is a perspective view of a drill according to the invention.
- Figure 6 is a perspective view of a sanding wheel according to the invention.
- FIG. 7 is a partial sectional and perspective view of an additional particular embodiment of diamond tools according to the invention.
- FIG. 1 represents a first known type of abrasive, cutting or cutting disc comprising a circular support 1, formed of a steel sheet, and a metallic structure 2, formed by a succession of diamond segments fixed by brazing, welding or sintering on the periphery of this sheet.
- a disc is generally called a "diamond disc”.
- the abovementioned concretions, forming the segments 2 can either be formed in situ by sintering on the periphery of the support 1, or be preformed sintered and fixed on the periphery of the support 1 by brazing or welding, or even by mechanical means.
- the junction between the support 1 and the various segments 2 is indicated by the reference 6 ′ in FIG. 2.
- the circular support 1 has a central bore 5 serving to drive the disc around its axis.
- the height or thickness of the segments 2 in the radial direction of the support 1 is traditionally less than 10 mm. These segments 2 are caused to wear out during sawing by slow abrasion of the metal matrix 4, while their cutting power is constantly regenerated by successive appearance of the layers of diamond grains 3.
- This type of disc is renowned for its cutting performance, wet or dry, in virtually all building materials, and generally in use on portable or table-top machines. The diameters generally range from 100 to 500 mm.
- notches 11 are provided between two consecutive segments 2.
- FIG. 3 is a schematic representation of a cutting disc according to the invention.
- the essential characteristic of the invention lies in the design and production of the structure 2 where the diamond grains 3 will have the best possible adhesion to take up the stresses induced by the cutting work.
- the structure 2 can be obtained prior to the molding of the support 1 by agglomeration of abrasive particles 8 containing the diamond grains 3.
- the dimensions and the number of these interstices, hollow or pores 9 are in particular a function of the nature , more particularly of the viscosity, of the material 6 from which the support 1 is made.
- the support 1 consists of a material 6 molded, cast, injected or pressed having a melting point greater than the temperature of the tool during use and less than 1000 ° C.
- the abrasive particles 8 are embedded in the material of the support 1, for example by overmolding so that this material 6, in the liquid or pasty state, can penetrate sufficiently into these interstices, recesses or pores 9 to obtain a rigid fixing. and reliable between the support and the structure 2 formed essentially by these abrasive particles 8 and above all to allow a sufficiently large torque to be transmitted from the support 1 to the diamond grains 3 during the use of this tool.
- the volume part occupied by the structure 2 at the periphery amounts to 60% while the material 6 has a penetration rate greater than 90% in the recesses, pores or interstices 9.
- These diamond grains can be agglomerated on a trellis or on a perforated plate by brazing, sintering or electroplating.
- the structure 2 can be directly obtained by coating each diamond grain 3 (as shown in FIG. 5), or a set of such grains by a coating and bonding layer or envelope 7. These coating methods are known so that it is not necessary to describe them here.
- the particles 8 obtained by coating grains of diamonds 3 are agglomerated together by brazing, gluing or sintering in the desired shape and dimension of the structure 2, that is to say ensuring that recesses, pores or interstices 9 remain between the agglomerated particles 8.
- Another embodiment of the structure 2 is obtained by agglomeration by the same means of diamond wires assembled in the desired directions, so as to form, for example, a trellis in the network in two or more layers of such wires.
- These threads can be obtained by extrusion of metallic powders or other premixes with diamond grains and a plasticizer allowing passage through suitable dies. Any other technique related to injection molding is also applicable for obtaining derived forms, the size of the particles 8 obtained having to be at least 300 microns. Furthermore, the average diameter of the diamond grains itself is preferably greater than 200 ⁇ m. Thus, the thickness of the coating layer 7 is at least 50 ⁇ m.
- the structure 2 can be produced in situ at the same time as the molding, casting, injection or pressing operation of the support 1 of the tool is carried out, provided that the materials chosen layers 7 for coating or for the formation of diamond grain agglomerates 3 are compatible to react chemically with the material 6 of the support 1.
- the chemical reaction is understood to mean the formation of an interface 7 ′ between two parts which is likely to create sufficient adhesion of one with respect to the other.
- the layer 7 is formed of a metal, such as nickel
- the material 6 of the support 1 is formed of another metal, such as aluminum
- the interface 7 ' is formed of an alloy of these two metals.
- thermo-mechanical characteristics of the materials used for the formation of the layer 7 of the agglomerated particles 8 must be greater than the thermomechanical characteristics of the materials 6 used for the production of the support 1.
- the present invention provides that the coating layer 7 of the diamond grains 3 either advantageously metallic of the iron, nickel, cobalt, copper, zinc type or their derivative alloys if the material 6 of the support 1 is a metal with a low melting point, such as aluminum, copper, zinc or their respective alloys, such as alpax, bronze, brass or zamak, or possibly a high performance polymer of the polyimide, polysulfone or PEEK (polyetheresterketone) type.
- This layer 7 will either be metallic of the same type as above, or based on polymers or liquid crystals of high thermomechanical performance, such as polyides, polysulfones, PEEK, when the support 1 will consist of a less sophisticated polymer, such as polyesters, epoxy possibly reinforced with glass fibers, aramid or carbon.
- Figure 4 relates to a diamond disc whose rigid structure formed of said particles 8 extends in a ring around the periphery of the support 1.
- this structure has a wavy shape in a direction tangential to this periphery, c ' that is, in the direction of the torque applied to the disc during use.
- the material 6, from which the support 1 is formed not only penetrates into the recesses 9 between the particles 8, but also completely fills the hollows 10 created laterally in the rigid structure 2 by this wavy shape. This further improves the attachment of the latter to the support 1.
- the width of the structure 2 carrying the diamond grains 3 can be variable and be essentially a function of the desired lifetime of the tool and the depth of cut required.
- the invention allows a wide choice of this width, for example from 1 to 25 mm.
- the support 1 is placed immobile in a suitable mold, not shown in the figures, and the material 6 of which is formed is injected, poured or pressed. the support in this mold in such a way that this material at least partially envelops the structure 2 and penetrates into the interstices 9 of this structure 2 thus making it possible to make the two parts intimately connected.
- the molding techniques are known in industrial practices.
- the support 1 of the tool is metallic, the casting methods for molten metal, sand, shell or pressure in permanent mold will preferably be used.
- the tool support is made of thermosetting or thermoplastic synthetic materials, the appropriate injection or molding methods will preferably be used.
- a steel frame 17 or a synthetic material can be placed beforehand in the mold used for the formation of the support.
- the support 1 is molded, cast or injected around this structure 2 makes it possible to produce a large number of types of support, both with regard to the geometry of the surfaces of the support and the composition thereof. Consequently, if the tool constitutes a cutting disc, it is possible to reduce the lateral contact surface of the latter with the material to be cut, for example by providing an embossing on the lateral faces of the concretion.
- fins 12 can be shaped in the lateral faces of the support 1, as shown in FIG. 6, to ensure ventilation of the latter when the disc is used, particularly when dry.
- a certain quantity of grains of carbide 13 or of another hard material can be mixed with the resin at the level of the lattice 2 in the form of a crown. These grains of carbide 13 or of this other hard material can thus be located in the meshes of the lattice 2.
- the quantity of grains of carbide or of this other hard material represents at most ten times the volume of the quantity of diamond grains 3 .
- these grains of carbide or another hard material 13 can also take place during the constitution of the mesh 2 by brazing, sintering or bonding to the latter.
- these grains 13 could be premixed with the diamond grains 3 to be fixed on the trellis 2 and therefore be found both on the trellis 2 itself and in the meshes thereof and even be distributed in the support 1 in order to improve the longevity of the latter.
- composition of the support 1 also thanks to the very simple conventional technique which can be applied for its formation, it is possible to incorporate therein loads of extremely varied nature and inserts even of very complex shape.
- particles with high thermal conductivity so as to facilitate the evacuation of calories, generated during the cutting force when the tool is used dry, from the periphery towards the axis of the machine driving the tool.
- Figure 7 is a schematic perspective view of a drill bit provided with a metal structure 2 containing diamond grains 3, corresponding to the embodiment, as shown in Figure 5.
- the material 6, including the cylindrical support 1 of this drill is formed is advantageously metal cast in a mold, not shown, in which the structure was already placed 2 positioning the diamond grains 3.
- This structure consists of a succession of plates distributed at equal distances along the free circular edge of the support 1 and cast therein.
- this support 1 is provided, on the side opposite its free circular edge, with an axial rod 14 for mounting the drill bit on a drive machine, not shown.
- This rod 14 is advantageously formed by an insert which, during the formation of the support 1, is molded by the material 6 of which the latter is made.
- Figure 8 is a perspective view of a grinding wheel, according to the invention, which is manufactured in the same way as the disc according to Figure 4 and the drill according to Figure 7 and whose fastening members 15 are also constituted by molded inserts in the support 1.
- FIG. 9 relates to a particular embodiment of diamond tools, according to the invention, for milling or surfacing objects 16 made of stony or vitreous materials.
- the working face that is to say the structure 2 positioning the diamond grains, can be of very varied shape. Indeed, it can not only be flat, as in a cup wheel, or cylindrical as for a polishing roller, but it can also have a concave or convex profile, such as for molding wheels or polishing shoes.
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9401028A BE1008917A3 (fr) | 1994-11-16 | 1994-11-16 | Outil abrasif, de coupe ou analogue et procede de fabrication de cet outil. |
BE9401028 | 1994-11-16 | ||
PCT/BE1995/000101 WO1996014963A1 (fr) | 1994-11-16 | 1995-11-06 | Outil abrasif, de coupe ou analogue et procede de fabrication de cet outil |
US08/680,378 US5885149A (en) | 1994-11-16 | 1996-07-15 | Homogenous abrasive tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0794850A1 true EP0794850A1 (fr) | 1997-09-17 |
EP0794850B1 EP0794850B1 (fr) | 1999-05-19 |
Family
ID=25662943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95936389A Expired - Lifetime EP0794850B1 (fr) | 1994-11-16 | 1995-11-06 | Outil abrasif, de coupe ou analogue et procede de fabrication de cet outil |
Country Status (9)
Country | Link |
---|---|
US (1) | US5885149A (fr) |
EP (1) | EP0794850B1 (fr) |
AT (1) | ATE180197T1 (fr) |
AU (1) | AU3836495A (fr) |
BE (1) | BE1008917A3 (fr) |
DE (1) | DE69509788T2 (fr) |
ES (1) | ES2133821T3 (fr) |
GR (1) | GR3030933T3 (fr) |
WO (1) | WO1996014963A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6593391B2 (en) | 2001-03-27 | 2003-07-15 | General Electric Company | Abrasive-filled thermoset composition and its preparation, and abrasive-filled articles and their preparation |
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DE19529786C1 (de) * | 1995-08-12 | 1997-03-06 | Loh Optikmaschinen Ag | Verfahren und Werkzeug zur Erzeugung einer konkaven Oberfläche an einem Brillenglasrohling |
US5976001A (en) * | 1997-04-24 | 1999-11-02 | Diamond Machining Technology, Inc. | Interrupted cut abrasive tool |
US5919084A (en) * | 1997-06-25 | 1999-07-06 | Diamond Machining Technology, Inc. | Two-sided abrasive tool and method of assembling same |
US6113474A (en) * | 1997-10-01 | 2000-09-05 | Cummins Engine Company, Inc. | Constant force truing and dressing apparatus and method |
US6042463A (en) * | 1997-11-20 | 2000-03-28 | General Electric Company | Polycrystalline diamond compact cutter with reduced failure during brazing |
US6528141B1 (en) | 1998-12-15 | 2003-03-04 | Diamond Machining Technology, Inc. | Support structure and method of assembling same |
US6402603B1 (en) | 1998-12-15 | 2002-06-11 | Diamond Machining Technology, Inc. | Two-sided abrasive tool |
US6261167B1 (en) | 1998-12-15 | 2001-07-17 | Diamond Machining Technology, Inc. | Two-sided abrasive tool and method of assembling same |
US7235192B2 (en) * | 1999-12-01 | 2007-06-26 | General Electric Company | Capped poly(arylene ether) composition and method |
US6905637B2 (en) * | 2001-01-18 | 2005-06-14 | General Electric Company | Electrically conductive thermoset composition, method for the preparation thereof, and articles derived therefrom |
EP1110671A3 (fr) * | 1999-12-20 | 2003-10-29 | Reishauer Ag. | Outil de dressage, de rodage et de meulage |
US7324635B2 (en) | 2000-05-04 | 2008-01-29 | Telemaze Llc | Branch calling and caller ID based call routing telephone features |
AU2002241785A1 (en) * | 2000-11-10 | 2002-07-24 | Gemsaw, Inc. | Coated saw blade |
US6443967B1 (en) * | 2001-05-03 | 2002-09-03 | Scimed Life Systems, Inc. | Injection moldable feedstock including diamond particles for abrasive applications |
US6723142B2 (en) | 2002-06-05 | 2004-04-20 | Tepco Ltd. | Preformed abrasive articles and method for the manufacture of same |
JP4530990B2 (ja) * | 2002-10-11 | 2010-08-25 | ユニバーシティ オブ コネチカット | 形状記憶特性を有するアモルファス及び半結晶質ポリマーのブレンド |
US20040137834A1 (en) * | 2003-01-15 | 2004-07-15 | General Electric Company | Multi-resinous molded articles having integrally bonded graded interfaces |
DE10309021B4 (de) * | 2003-02-21 | 2005-02-24 | Schmirgelwerk Chemnitz Gmbh | Schleifkörper |
JP2004291213A (ja) * | 2003-03-28 | 2004-10-21 | Noritake Super Abrasive:Kk | 研削砥石 |
GB0400978D0 (en) * | 2004-01-16 | 2004-02-18 | Element Six Ltd | Diamond bonding |
US8151783B2 (en) * | 2005-06-27 | 2012-04-10 | Husqvarna Outdoor Products Inc. | Tools and methods for making and using tools, blades and methods of making and using blades |
WO2008021260A1 (fr) * | 2006-08-10 | 2008-02-21 | Derek Mcgrogan | articles abrasifs |
MY151755A (en) * | 2007-12-28 | 2014-06-30 | Shinetsu Chemical Co | Outer blade cutting wheel and making method |
DE202008013561U1 (de) * | 2008-10-15 | 2010-03-04 | Edt Eurodima Gmbh | Trennwerkzeug |
US8079428B2 (en) | 2009-07-02 | 2011-12-20 | Baker Hughes Incorporated | Hardfacing materials including PCD particles, welding rods and earth-boring tools including such materials, and methods of forming and using same |
US8353278B2 (en) | 2009-07-22 | 2013-01-15 | C.M.S.-North America, Inc. | Rotary stone cutting tool |
MY193551A (en) * | 2010-11-29 | 2022-10-18 | Shinetsu Chemical Co | Cemented carbide base outer blade cutting wheel and making method |
US9061264B2 (en) * | 2011-05-19 | 2015-06-23 | Robert H. Frushour | High abrasion low stress PDC |
US9533430B1 (en) * | 2011-10-18 | 2017-01-03 | Robert M. Kalb | Portable adjustable cutting apparatus for cutting and shaping sink holes in stone countertops |
US20130269498A1 (en) * | 2012-04-11 | 2013-10-17 | Adam R. Loukus | Composite Cutting Blade |
JP6667100B2 (ja) * | 2015-12-14 | 2020-03-18 | 株式会社ジェイテクト | ツルア、これを備えたツルーイング装置、研削装置及びツルーイング方法 |
DE102016006951B4 (de) * | 2016-06-08 | 2018-05-09 | KAPP Werkzeugmaschinen GmbH | Verfahren zum Herstellen eines Abrichtwerkzeugs für ein Schleifwerkzeug |
CN108237484A (zh) * | 2016-12-26 | 2018-07-03 | 圣戈班磨料磨具有限公司 | 形成研磨制品的方法 |
US11383350B2 (en) | 2017-02-28 | 2022-07-12 | 3M Innovative Properties Company | Metal bond abrasive articles and methods of making metal bond abrasive articles |
CN212351801U (zh) | 2017-12-01 | 2021-01-15 | 米沃奇电动工具公司 | 用于驱动紧固件的工具头 |
USD921468S1 (en) | 2018-08-10 | 2021-06-08 | Milwaukee Electric Tool Corporation | Driver bit |
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-
1994
- 1994-11-16 BE BE9401028A patent/BE1008917A3/fr not_active IP Right Cessation
-
1995
- 1995-11-06 ES ES95936389T patent/ES2133821T3/es not_active Expired - Lifetime
- 1995-11-06 AU AU38364/95A patent/AU3836495A/en not_active Abandoned
- 1995-11-06 WO PCT/BE1995/000101 patent/WO1996014963A1/fr active IP Right Grant
- 1995-11-06 AT AT95936389T patent/ATE180197T1/de not_active IP Right Cessation
- 1995-11-06 EP EP95936389A patent/EP0794850B1/fr not_active Expired - Lifetime
- 1995-11-06 DE DE69509788T patent/DE69509788T2/de not_active Expired - Fee Related
-
1996
- 1996-07-15 US US08/680,378 patent/US5885149A/en not_active Expired - Fee Related
-
1999
- 1999-08-06 GR GR990402014T patent/GR3030933T3/el unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9614963A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6593391B2 (en) | 2001-03-27 | 2003-07-15 | General Electric Company | Abrasive-filled thermoset composition and its preparation, and abrasive-filled articles and their preparation |
Also Published As
Publication number | Publication date |
---|---|
BE1008917A3 (fr) | 1996-10-01 |
US5885149A (en) | 1999-03-23 |
WO1996014963A1 (fr) | 1996-05-23 |
ATE180197T1 (de) | 1999-06-15 |
GR3030933T3 (en) | 1999-11-30 |
DE69509788T2 (de) | 1999-12-09 |
AU3836495A (en) | 1996-06-06 |
EP0794850B1 (fr) | 1999-05-19 |
ES2133821T3 (es) | 1999-09-16 |
DE69509788D1 (de) | 1999-06-24 |
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