IMPREGNATING OR COATING AN ABRASIVE TOOL

Coated abrasive material is provided having coated on the adhesive bond a supersize layer which improves grinding and which is stabilized against thermal degradation during use of the abrasive material. This layer comprises an elastomeric material and a sufficient amount of antioxidant to limit oxidative...     

A low-density abrasive article, especially suited for scouring steel griddle surfaces without causing undesirable surface roughness thereto, comprises a lofty, open, fibrous web of curved continuous glass filament bundles which is impregnated with a hard thermoset resin containing abrasive particles.

An abrasive article comprising abrasive grains, bonding agents and at least partially active fillers, whereby the active filler material is located in or on the abrasive grains.

The specification discloses nucleating diamonds in the absence of an external container. Nickel and graphite are subjected to high temperature and pressure, e.g., by a grinding process, sufficient to cause diamond nuclei to be formed.

A diamond bonding process wherein a metallic workpiece is pre-etched and thereafter diamond is uniformly and densely bonded to the surface of said metallic workpiece in a nickel matrix. A novel second plating of nickel metal more securely bonds the diamonds to the workpiece.

A cubic boron nitride, diamond or similar grinding wheel is dressed by applying a dresser comprising a multiplicity of abrasive particles dispersed in a normally rigid but friction-meltable organic polymeric matrix against the rotating wheel and causing the dresser to melt and form a dressing slurry...     

Improved cutting teeth for etched abrading material and process for etching the abrading material are provided wherein the improved teeth comprise substantially flat top posts haing substantially straight or vertical sides. In addition, selected dimensional ratios are maintained between the etched teeth...     

A dentifrice abrasive coated with a cationic water-soluble polymer which abrasive is thereby made less adsorptive to therapeutic cationic agents, and therapeutic compositions containing said abrasive.

An ophthalmic flat roughing wheel having a circumferential grinding layer made of a diamond-containing metallic matrix having greater diamond concentration in the center than at the edges. The wheel is made by bonding to the circumferential surface of a wheel blank, a diamond-containing metallic matrix...     

A cleaning tape used for cleaning the surface of a magnetic recording head of a tape recorder or the like consists of a substrate and a cleaning layer. The cleaning layer contains two kinds of particles. One kind of particles has a small diameter and a high hardness, and the other has a large diameter...     

The proposed compact-grained diamond material consisting of powdered diamond particles is characterized in that the diamond particles therein are coated with a titanium carbide or zirconium carbide film, which film forms a cellular structure over the entire body of the material, and are bound with copper-titanium...     

A non-cellular polyurethane polishing and finishing wheel is disclosed having a molded annular matrix reinforced at the inner circumference by a circumferential reinforcing means. The radially outer portion of the matrix is free to deform during use and is formed of a flexible elastomeric polyurethane...     

A tool for releasably supporting a length of abrasive strip material in a generally cylindrical coil with its abrasive surface out and for transferring torque from a drive chuck to rotate the coiled strip about its axis so that the outer surface of the strip may be used to abrade a workpiece. The tool...     

A dual bonding process to make single layered tools wherein a metallic workpiece is pre-etched so as to form cavities in the surface of the workpiece for individually receiving diamond or other abrasive particles to be bonded thereto. The diamond particles are uniformly deposited and densely bonded to...     

A polishing foil or plate is made up of a metallic base provided with a non-metallic layer which covers the polishing surface, acts as a polishing substrate and is intimately bonded to the metallic base. Used together with polishing substances, the polishing foil or plate prepares material such as metals,...     

A process for making cloth backing for coated abrasive articles is disclosed wherein a backing material is coated on its front side, with a liquid thermosetting resin, in such a manner that the resin does not permeate the interstices of the cloth. As a result, the cloth retains most of its original pliability...     

Cutting filaments having a long service life consist of a monofilament of a synthetic polymer into which from 0.3 to 10 percent by weight of an abrasive are incorporated. In the cutting process the abrasive is not ripped off, as it does happen with steel wires bearing the abrasive on their surface, but...     

A flexible plastic strip having oppositely disposed faces, one of said faces being smooth and the other defining a smooth middle portion and opposite end portions diagonally coated with an abrasive. The width of the finishing strip is made approximately the same as an average distance from gum line contact...     

The grinding efficiency, performance and quality of the object ground can be increased by employing a grinder which has a grindstone treated with a wax which is impregnated into the grindstone by use of a heated solution of a higher aliphatic acid and higher alcohol group.

Calendaring of woven polyester fabric at 20 to 60 tons pressure and 200.degree. to 380.degree. F., provides a smooth surface, upon which fine grit abrasive may be applied, to produce flexible coated abrasive articles for polishing applications.

This invention relates to improved fabrics used in the reinforcement of resin-bonded abrasive wheels. The fabrics are characterized by a coating of a novolak resin essentially free of added crosslinking agents.

A metal abrading material formed from acid etching with a resist pattern comprising a plurality of polygonal shapes with accentuated corners dispersed in a pattern chosen to intermix cutting points with planing edges.

A lap cutting abrasive for use with lap cutting blades, comprising one part y weight of a low viscosity carrier liquid, and one to three parts by weight of cutting particles having an average size of from 10 to 50 .mu.m suspended in the carrier liquid. The carrier liquid has a viscosity of from 1 to...     

Disclosed is an improved abrasive material particularly useful as a dispersoid in metal matrices to provide articles of use having superior abrasive properties, especially at elevated temperatures. The improved abrasive material typically comprises silicon carbide particulate, the individual particles...     

An abrasive sheet is disclosed which can be hand held or used with known abrasive devices, has longer abrasive life than existing abrasive sheets and has a novel attachment arrangement onto an abrasive support member. The abrasive sheet has abrasive material coated on one surface and a layer of resilient...     

An abrasive tool for grinding a combined workpiece of a steel with an ultrahard alloy, comprising a grinding wheel comprising a resinoid binding wheel and synthetic diamond abrasive grits held therein, said grits being characterized by selected combinations of grit size, bulk density and grit strength.

A deposit of cubic boron nitride is placed on a substrate by an activated reactive evaporation method. The method includes: supporting and heating a substrate in vacuum; evaporating metal vapors into a zone between the substrate and a metals alloy source, said source consisting essentially of at least...     

Abrasive grains are bound to a flexible support by a pattern of resin applied by means of a curved stencil having a wall thickness of 0.08 to 1 mm and having holes with a diameter of 0.05 to 3 mm, the total hole area amounting to 5 to 50% of the area of the stencil. A top binding agent is applied before...     

An abrasive member for electrophotographic image-holding member comprising an abrasive dispersed in a resin of linear structure.

Loading resistant coated abrasives can be made without the need for a supersize coating of metal stearates or any other material by incorporating phosphoric acids, partial esters of such acids, amine salts of such acids and partial esters, and/or quarternary ammonium salts with at least one long substituent...     

The invention provides a method of metal coating diamond or cubic boron nitride particles, the metal being capable of forming a chemical bond with the particles, including the steps of providing a mass of metal for the coating in powdered form in contact with the particles, heat treating the metal powder...     

Abrasion resistant composite cutting tools comprise a particulate material selected from the group consisting of the refractory metal carbides, nitrides, carbonitrides and combinations thereof uniformly distributed in a matrix. The particulate material is of an average particle size ranging between about...     

Coated cutting tools and coated cutting tool inserts having improved mechanical and chemical wear resistance under demanding conditions of machining speed, temperature, or workpiece hardness comprise a silicon nitride substrate body having at least one hard, intermediate adherent coating layer of a refractory...     

The invention provides an abrasive body suitable for mounting in a tool for abrading operations, the body including an abrasive compact comprising a mass of abrasive particles, present in an amount of at least 70 percent by volume of the compact, bonded into a hard conglomerate and support means covering...     

The disclosure is directed to a method and apparatus for superfinishing magnetic disk substrates using a non-friable polishing pad including a high density polyurethane foam binder in which at least 50 per cent by weight of classified hard particles are retained. Polishing occurs by rotating the pad...     

A machine for surface finishing wood veneer feeds the veneer to a grinding drum positioned over a rigid bed plate. A continuous loop feed belt carries the veneer to and away from the bed plate but passes thereunder to permit a rigid gap between the bed plate and the drum grinding surface. The drum is...     

Enhanced micromachining rates are observed when lapping discs with standard SiO.sub.x lapping coatings are doped with trivalent or pentavalent additives, such as boron or phosphorous. Doping can be accomplished by subjecting the SiO.sub.x material to a "post glow", i.e., an argon plasma in the presence...     

In a method of making a polishing element a photoresist film 2 is first deposited on a surface of metal stock 1. A photomask 3 is then used to selectively cover portions of the deposited photoresist film 2. Thereafter, portions of the photoresist film 2 which are not covered by the photomask 3 are removed...     

Grinding stones, especially resinous and metallic grinding stones which have a controlled distribution of abrasive grains are made by a novel method, in which electrically conductive layers of such pattern which controls sites to be bonded with the grains are formed on the selected surface of a binder...     

A rosette shaped polishing pad includes a tough, flexible substrate, which is coated on one side with a layer of pressure sensitive adhesive for securing the pad to a polishing lap or the like, and on its opposite side with a flexible, water soluble matrix containing polishing particles such as cerium...     

A method of making aggregated diamond abrasive particles comprising forming a mixture of diamond abrasive particles and a powdered metal, heating the mixture to sinter the metal followed by cooling to produce a mass and crushing the mass to obtain the aggregated particles, characterized in that the particles...     

The invention is a composite polycrystalline diamond compact comprising at least one layer of diamond crystals and precemented carbide pieces which have been pressed under sufficient heat and pressure to create composite polycrystalline material wherein polycrystalline diamond and the precemented carbide...     

An abrasive wheel comprised of abrasive granules dispersed throughout and adhered in a matrix with a binder system which comprises a blend of a tough adherent binder and a smear-reducing quantity of a smear-reducing compatible polymer. An abrasive wheel having abrasive granules adhered by the binder...     

A coated abrasive surface polishing product with excellent finish refinement capability and long life can be made by coating a layer of resilient material laminated to a conventional coated abrasive backing with an elastomeric maker adhesive and conventional abrasive grain. Optionally, an intermediate...     

A method for making grinding wheels having an annular grinding section mounted on a central hub in which a slurry of abrasive particles and ceramic bond is coated on a pre-formed core, shaped, and fired. Method has particular advantage in formation of wide wheels and contoured wheels. Premium abrasive...     

An abrasive compact is provided comprising a mass of cubic boron nitride particles and a second phase bonded into a hard conglomerate; adjacent cubic boron nitride particles being joined to each other to form an intergrown mass; the cubic boron nitride content of the compact being at least 80 percent...     

A thermally stable diamond compact which has an alloy of liquidus above 700.degree. C. bonded to a surface thereof. The alloy contains at least 40 percent by weight of silver or gold or a combination thereof and 1 to 10 percent by weight of an active metal selected from the group of tungsten, titanium,...     

Knife sharpener rollable on a support and having two substantially coaxially disposed equally sized rollers (2,4) pressed resiliently against each other. The rollers have on their facing sides externally conical intermeshing toothed rings (32) which consist at least at their facing faces (38) of a durable...     

A method is provided for making improved molded abrasive tools by applying centifugal force and/or vibratory action to the abrasive particles during the molding operation. The abrasive is thereby forced and/or sifted preferentially into a closely packed surface layer with close conformity to the mold...     

A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of: preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles...     

A method of making an abrasive tape comprises the steps of preparing an abrasive composition at least from abrasive grains and a binder, applying the abrasive composition onto a flexible substrate, and drying the applied abrasive composition. The step of preparing the abrasive composition comprises kneading...     

A monolayer diamond tool is made by coating diamond abrasive particles with a carbide-forming metal and then brazing the coated diamond to a tool substrate.

A cutting tool, in particular of hard metal, which is coated with hard layers of titanium carbide, titanium carbonitride and/or titanium nitride and that has an outer thin layer of zirconium nitride. The thickness of this outer layer of zirconium nitride amounts to between 1 and 30%, preferably 1 to...     

A gearlike dressing tool coated with extremely hard abrasive grains like diamond or CBN. To reduce the manufacturing expenses, not all but only a portion of the teeth is coated. The remaining teeth remain uncoated. The coated teeth lie always directly side-by-side in a peripheral direction and have,...     

Abrasive compacts are described which comprise a support mass having abrasive masses bonded to each of the upper and lower surfaces of said support mass. Preferably, the abrasive masses are diamond or cubic boron nitride and the support mass is a sintered carbide. Bonding of the abrasive masses to the...     

Particles of urea formaldehyde furan resin are used as abrasive media in wet or dry blasting.

A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of: preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles...     

An abrasive article for polishing glass and ceramic surfaces comprised of a combination of abrasive particles and inorganic glass polishing aid dispersed throughout a three-dimensional nonwoven fibrous web of organic material, and adhered therein by a resinous binder. The article is capable of refining...     

A tool component is provided which comprises an abrasive compact bonded to a cemented carbide support body. The abrasive compact has two zones which are joined by an interlocking, common boundary. The one zone provides the cutting edge or point for the tool component while the other zone is bonded to...     

A composite abrasive compact is produced by placing strips of suitable abrasive material on a cemented carbide substrate. The strips each comprise abrasive particles, optionally with a particulate second phase, in an organic binder. The organic binder is first removed by volatilization. Then, the cemented...     

A multilayer abrading tool is produced by first providing a tool substrate with a structured abrading surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool...     

The grinding performance of organic bonded abrasive bodies whose abrasive portion is wholly or partially composed of aluminous abrasive grits is significantly improved by providing a magnesium oxide-rich or manganese oxide-rich coating on furfural-wetted grits just prior to addition of resin and filler...     

A bonded abrasive grit structure which may be attached to a tool surface and a method for making a grit structure and tool therefrom. The grit structure includes a plurality of peaks which have a grit particle at the apex and are substantially the same height such that the apexes collectively define...     

An abrasive tape comprises a flexible substrate and an abrasive layer which is overlaid on the flexible substrate and which contains abrasive grains and a binder. The abrasive grains comprise first abrasive grains, which have a mean grain diameter within the range of 0.07 .mu.m to 0.40 .mu.m and a Mohs...     

An abrasive product comprising abrasive grains bonded to at least one major surface of a backing sheet by a binder formed from a blend comprising radiation curable monomer and a thermally curable resinous material. The radiation curable monomer can be selected from the group consisting of isocyanurate...     

Processes are provided for cleaning metal in preparation for painting, coating, welding or other subsequent process. The processes all include rinsing the metal with a solution of deionized water and a water soluble amine having a vapor pressure of at least about 10% of the vapor pressure of water at...     

Particulates, e.g., powders, of the rare earth borides are well suited for the effective abrasion/polishing of a variety of characteristically hard substrate face surfaces, e.g., hard ceramic surfaces.

A tool component comprises an abrasive compact bonded to a support which itself is bonded through an alloy to an elongate cemented carbide pin. The alloy has a liquidus below 900.degree. C. and the following composition, by weight: PRETEXTREPLACED The shear strength of the bond achieved between the support...     

A tool component comprises an abrasive compact bonded to a support which itself is bonded through an alloy to an elongate cemented carbide pin. The alloy has a liquidus below 900.degree. C. and the following composition, by weight: PRETEXTREPLACED and at least one of In, Sn, Zn and Ag, the In and Sn,...     

The back finish of a flexible grinding tool, especially a grinding belt, tains an ingredient which is composed predominantly of plate-like mineral particles, preferably micaceous iron ore. It gives the belt a higher rigidity and better sliding properties on its back.

A device for sharpening chain saw cutter teeth includes a rigid disc member which has an abrasive coating deposited on its outer circumferential edge. The abrasive coating has a circumferential outer grinding surface which, when viewed in cross-section on a plane which is perpendicular to and radial...     

A flexible abrasive article for cleaning, polishing or smoothing objects which is resistant to absorption of liquid and capable of conforming to the shape of the object. The article comprises a flexible resilient closed cell polyvinyl chloride foam substrate having upper and lower surfaces with a reinforcing...     

A tool insert comprising an abrasive compact bonded to a cemented carbide support. The cutting edge of the tool is provided by the periphery of the compact. A plurality of recesses, each filled with abrasive compact material, extend into the cemented carbide support from the compact/carbide interface....     

A coated abrasive is disclosed that has been oversized with an anti-loading amount of a quaternary ammonium anti-static compound, comprising from about 15 to about 35 carbon atoms and a molecular weight not less than about 300, have been found to have a combination of anti-static, lubricity and anti-loading...     

An abrasive tool comprises a base and an abrasive powder bonded to the base in the form of a single-layer structure in which the particles do not substantially overlap or rest one upon another. For the bonding purpose the abrasive powder is either dispersed in a dilute solution of a binder resin and...     

The metal bonded diamond wheel of the invention has a sintered body of a mixture of a diamond powder and a bonding metal powder. The particles of the bonding metal powder or, preferably, particles of both of the diamond powder and the bonding metal powder are provided, prior to powder metallurgical sintering,...     

A low-density nonwoven abrasive pad, especially suited for use as a scouring article, formed of a multiplicity of continuous, crimped thermoplastic organic filaments having one end of substantially all of the filaments bonded together at one end of the pad and the opposite end of substantially all of...     

A tool insert comprising an abrasive compact bonded to a cemented carbide support. The cutting edge of the tool is provided by the periphery of the compact. A plurality of circular, concentric recesses, each filled with abrasive compact material, extend into the cemented carbide support from the compact/carbide...     

An abrasive grain with an aluminum oxide base which is distinguished by good throwing power and by a good capability of being integrated in flexible abrasives or in grinding wheels with artificial resin bonding.

An abrasive grain on the basis of silicon carbide with a binder-free coating of highly dispersed silicon, aluminum or titanium oxide for preferred use in resin-bonded or ceramic-bonded abrasive wheels.

A material removing tool wherein a wheel-shaped, rod-like, tubular or otherwise configurated carrier supports pulverulent and/or granular particles of abrasive material which are joined to each other and/or to the carrier by active solder, such as an alloy or an eutectic of copper, silver, titanium and/or...     

A multilayer abrading tool is produced by first providing a tool substrate with a structured abrading surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool...     

An abrasive grain with an aluminum oxide base which is distinguished by good throwing power and by a good capability of being integrated in flexible abrasives or in grinding wheels with artificial resin bonding.

A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of: preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles...     

An erodable abrasive granule comprising a plurality of first abrasive grains bonded together by a first binder to form an erodable base agglomerate and at least a partial coating of second abrasive grains bonded to the periphery of the base agglomerate by means of a second binder. These abrasive granules...     

The strength and water resistance of the binding of abrasive grain on the basis of corundum or silicon carbide into synthetic resin bonded abrasive agents is improved by a surface treatment with microdispersed hydrophobic silicon dioxide.

A composite material is formed of a carrier having a cellular structure and diamonds or other hard, abrasive particles received within the cellular structure. A matrix material holds the diamonds in the carrier, and the matrix material may be the carrier itself or an additional substance such as a metal...     

Superabrasive grits such as diamond or CBN is chemically bonded with a coating such as tungsten which is in turn bonded to a tool body providing superabrasive cutting tools such as saw blades, grinding wheels, drill bits and the like.

An abrasive member comprises a metal film (2) attached to one surface of a flexible sheet (1), a mask (13) of plating resistant material on the exposed surface of the metal film, the plating resistant material having a multitude of discrete openings (14) therein, and metal (3) electrodeposited through...     

A grinding wheel for use in a grinding machine, wherein a plurality of grinding tips are bonded on the periphery of a wheel core having a disk-like shape using a bond which forms a bonding layer between the wheel core and the grinding tips. The grinding wheel is further provided with means for preventing...     

Grinding wheels are constructed with an improved type of resin binder of a low molecular weight solid epoxy resin. The epoxy resin is in the form of a fine powder and may be mixed with other wheel components such as abrasive grain, wetting agent and fillers. A method in which the epoxy resin and curing...     

The invention relates to grinding tools, particularly to grinding wheels having an annular band of abrasive material at their periphery and provides an improved method of manufacture. A mixture of abrasive material, temporary binder and ceramic bond is heated to paste-like consistency and then coated...     

A method of producing an abrasive body which consists of an abrasive compact sandwiched between layers of cemented carbide. The method includes the steps of providing an unbonded structure comprising a layer of ultra-hard abrasive particles sandwiched between two carbide layers. Each carbide layer is...     

Multigrain abrasive particles and articles made therefrom are provided wherein the particles comprise fine granules of cubic boron nitride or diamond bound by a sintered matrix of one or more layers of active coating material that is chemically bonded to the underlying surface. These particles are obtained...     

A coated abrasive article having carbon black aggregates incorporated into the construction thereof, in a concentration sufficient to reduce or eliminate the buildup of static electricity during its use.

Abrasive article using sintered sol-gel abrasive particles mixed with other particles having greater friability, and carried in a bond.

A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of: preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles...     

A marble, granite and stone gel-type polishing composition and method. The polishing composition includes a polishing constituent mixture and a gel-type carrier agent. The gel-type carrier agent at least temporarily maintains the polishing constituent mixture in suspension prior to and during application...     

An abrading tool (10) particularly well adapted for abrading rubberized components. The tool (10) comprises a hardened steel substrate (12) having a matrix bonding layer (14) thereover. A plurality of hard particles (18) are disposed at least partially within the matrix bonding layer (14). An outer coating...     

A method of manufacture of a durable abrasive sheet which includes a perforated metal sheet of woven metal mesh or the like having abrasive grit brazedly attached, imbedded in a backing substrate. The method includes the steps of coating a perforated metal substrate with a mixture of an infiltrant and...