Abstract: An abrasive article includes a plurality of abrasive particles securely affixed to a substrate with a corrosion resistant matrix material. The matrix material includes a sintered corrosion resistant powder and a brazing alloy. The brazing alloy includes an element which reacts with and forms a chemical bond with the abrasive particles, thereby securely holding the abrasive particles in place. A method of forming the abrasive article includes arranging the abrasive particles in the matrix material, and applying sufficient heat and pressure to the mixture of abrasive particles and matrix material to cause the corrosion resistant powder to sinter, the brazing alloy to flow around, react with, and form chemical bonds with the abrasive particles, and allow the brazing alloy to flow through the interstices of the sintered corrosion resistant powder and form an inter-metallic compound therewith.

Abstract: The present invention relates to an ultra fine groove chip (or tip) and an ultra fine groove tool, wherein thermal damage is reduced as coolant retained in grooves stops heat generation when working in shear (ductile) mode and whereby good quality of worked surface is obtained. The present invention comprises an ultra fine groove chip, wherein a chip made of hard material selected from the group consisting of diamond, cubic boron nitride, tungsten carbide, cemented carbide, high-speed steel, ceramics and others has its face engraved with a number of fine grooves to form working surfaces, and whereby each working surface sectioned by grooves constitutes an ultra fine edge. The invention also comprises an ultra fine groove tool which is provided with a rotatable base board and at least one ultra fine groove chip, wherein the board constituting a holder is holding the ultra fine groove chip.

Abstract: A system and method for attaching an abrasive article to a backing pad is provided. The system includes a backing pad including loop-textile material applied to an attachment surface thereof and an abrasive article, which is removably attached thereto. The abrasive article has at least first and second surfaces including a plurality of abrasive particles adhered thereto. The first surface of the abrasive article includes abrasive particles having a size and density selected to provide a desired surface finish of a workpiece surface being abraded with the abrasive article. The second surface includes a plurality of abrasive particles having a size and density selected to releasably engage textile loops extending from the loop textile material applied to the backing pad attachment surface. Various embodiments, including double-sided sandpaper sheets and sanding screens, which adhere to the textile loops extending from the loop textile material applied to the backing pad attachment surface are disclosed.

Abstract: An outside diameter finishing tool (10) has an outer shell (16) and an inner annular abrasive layer (22) for precision finishing the outer surfaces of generally cylindrical workpieces. The inner layer (22) of the tool (10) is made of superabrasives and defines the cutting size of the tool (10). The inner layer (22) cuts simultaneously around the full periphery of a cylindrical workpiece rotated within the tool (10). A slot (14) is provided through the tool (10) to allow for radial adjustment of the cutting size of the tool (10).

Abstract: Apparatus is described for surface finishing complex and simple surface shapes by abrasion of select zones of the surface, leaving contiguous zones unfinished. The apparatus is simple in construction and required little in training for operation. The apparatus includes an abrasive surface, which in cross-sectioned profile is negative image of the surface zone to be abraded of finished, and a relief surface corresponding to the zone or zone to remain unfinished.

Abstract: The present invention relates to supported polycrystalline diamond compact cutters (PDC cutters) made under high temperature, high pressure (HT/HP) processing conditions, and more particularly to supported PDC cutters having non-planar cutting surfaces. More specifically, the present invention is for an oriented PDC cutter wherein chips and debris are funneled away from the cutting edge by a raised top surface of the polycrystalline diamond layer (PCD layer). The redirection of the debris is achieved by the creation of high and low regions on the PCD layer, of which there can be a variety of different surface geometry's. Thus, an object of the present invention is to provide a PDC cutter with improved performance through channeling debris away from its cutting edge.

Abstract: A supported polycrystalline compact (PC) cutter made under high temperature, high pressure (HT/HP) processing conditions having non-planar interfaces between the PC layer and a cemented carbide support layer. The carbide PC interface geometry is such that one or more protrusions extend from the support layer into the PC layer. The protrusions have a low cobalt metal binder content of about 3-9% by weight. The low cobalt metal binder content in the protrusions results in enhanced performance and improved resistance to cracking during installation and/or to brazing breakage.

Abstract: The present invention describes a diamond tool with diamond bonded chemically by a braze that contains either Cr, Mn, SI, or Al or mixtures or alloys thereof. The diamond tool is made by infiltrating the braze into a matrix metal that contains diamond in either form of grits or polycrystalline bodies.

Abstract: Segmented cutting tools such core drill bits and diamond saw blades can be made more efficient by hardening a portion of the sides of each of the segments.

Abstract: An improved turntable of a nylon fiber grinding wheel, which is integrally made of plastic by injection has a predetermined amount of flexibility. The turntable has a locking hole provided at a center portion therethrough, and a ring groove encircling the locking hole on a top surface of the turntable. The ring groove has a plurality of through slot arranged spacedly and radially and defines a plurality of ribs arranged radially and respectively between the through slots. A bottom surface recess of the turntable and ring groove are overfilled with a gluing agent such as epoxy resin, so that the gluing agent would also fill in the plurality of through slots and enwrap around the plurality of ribs. Therefore, a nylon fiber grinding plate can be attached to the bottom surface recess of the turntable by means of the gluing agent.

Abstract: A method for fabricating a tool used in cutting, grinding and machining operations, is provided. The method is used to deposit a mixture comprising an abrasive material and a bonding material on a tool surface. The materials are propelled toward the receiving surface of the tool substrate using a thermal spray process. The thermal spray process melts the bonding material portion of the mixture, but not the abrasive material. Upon impacting the tool surface, the mixture or composition solidifies to form a hard abrasive tool coating.

Abstract: The present invention provides a hole saw or core drill bit for cutting annular holes in materials such as concrete, asphalt, masonry, rock, stone and related materials. The bit includes an elongated cylindrical body having a first end portion and a second end portion, a mounting platform at the first end of the body for attaching the bit to a driver and a cutting head at the second end of the body. The cutting head constitutes a plurality of cutting segments mounted on the annular face of the second end portion of the body. Each of the segments includes an outer portion, a middle portion and an inner portion. Each of the portions includes diamond particles dispersed throughout. The inner portions and the outer portions of the segments each have a greater concentration of diamond particles as compared to the middle portions. This dispersion of diamond particles provides a core drill bit with improved performance.

Abstract: An abrasive tool includes a base having an upper surface and a perforated sheet having a lower surface and an upper surface. A layer of abrasive grains is bonded to the upper surface of the perforated sheet. The upper surface of the base is bonded to the lower surface of the perforated sheet by a brazing material. A method of assembling an abrasive tool includes bonding the upper surface of the base and the lower surface of the perforated sheet by brazing the surfaces together and bonding a layer of abrasive grains to the upper surface of the perforated sheet.

Abstract: A superabrasive cutting element, the substrate of which is structured with a reduced dimension circumferential portion about which is formed an annular portion of superabrasive material, such as sintered diamond in the form of a polycrystalline diamond compact, to provide a ring- or skirt-like portion of superabrasive material at the perimeter of the cutting element to reduce residual tensile stresses existing at the perimeter of the cutting element after formation.

Abstract: A diamond-charged abrasive layer (3) of a grinding wheel has a convex profile over at least part of its length (L) in order to have greater resistance to wear. Also provided is a machine for grinding ophthalmic lenses which employs the grinding wheel.

Abstract: A pot-shaped grinding wheel having a circular grinding region provided with a plurality of segment-like grinding members (5), a circular seat region (4) coaxial with an axially spaced from the grinding region (2), a transition region (3) extending between an inner contour of the grinding region (2) and an outer contour of the seat region (4) and tapering toward the outer contour of the seat region (4), and at least one bore (6) extending parallel to an axis of the grinding wheel and arranged in the grinding region (2) and at least one bore (7) likewise extending parallel to the grinding wheel axis and arranged in the transition region (3).

Abstract: A supporting substrate for supporting a diamond layer on a cutting element is disclosed which has an irregular surface defining the interface between the substrate and the diamond layer. The irregularities in the surface comprise closed loops that may vary in amplitude, frequency or both. The irregularities may comprise ridges or grooves or a combination of ridges and grooves.

Abstract: Honing tools and methods of making such tools utilize a compact bundle of abrasive containing plastic monofilaments projection a relatively short distance from a holder with the compacted tips forming the working face of the tool. The bundle may be secured to the holder by a thin layer of adhesive or by a clinched or swaged girdling lip or rim on the holder which embraces the bundle. In addition, the bundle is further infused with an elastomer, preferably foamed. The bundle is enclosed in a mold which may be part of the clinching process and an elastomer is injected into the mold to infuse and encapsulate the bundle. The encapsulation fills the interstices of the bundle and form an integument around the bundle in effect making the tip action tool into a solid yet elastic block. This enables the abrasive monofilaments to have a higher abrasive loading since they are additionally supported by the matrix, and the tool to be applied at higher pressures.

Abstract: A cutting element having a body which includes a grip portion from which extends a protrusion which is concentric to the grip portion. The diameter of the grip portion is larger than the diameter of the protrusion. Moreover, the upper portion of the protrusion has a larger diameter than the base of the protrusion. An ultra hard material cutting layer is formed on top of the protrusion and grip, covering and surrounding the protrusion resulting in a cutting layer that is mechanically interlocked with the body of the cutting element. A transition layer may be incorporated between the protrusion and the ultra hard material layer. The transition layer is preferably encapsulated by the ultra hard material layer.

Abstract: A valve refacing tool comprising a hollow cylindrical column. The column has an upper end and a lower end and has a central bore throughout its entire length. The column has exterior threads at its upper end and an outwardly flared cylindrical support at its lower end. A crown is provided and has a central vertical bore with internal threads removably received by the threads at the upper end of the column. The crown has a lower surface with a radial interior edge adapted to be supported on the upper end of the column. The crown has a plurality of radially extending fins each with an enlarged height at its radially exterior edge and an upper surface at an angle with respect to the vertical. Each upper surface has a dove tail recess. A cylindrical bushing sleeve is positioned within the bore of the column. The bushing sleeve has an upper end located at an intermediate extent of the column and a lower end located beneath the lower end of the column.

Abstract: An outside diameter finishing tool (10) has an outer shell (16) and an inner annular abrasive layer (22) for precision finishing the outer surfaces of generally cylindrical workpieces. The inner layer (22) of the tool (10) is made of superabrasives and defines the cutting size of the tool (10). The inner layer (22) cuts simultaneously around the full periphery of a cylindrical workpiece rotated within the tool (10). A slot (14) is provided through the tool (10) to allow for radial adjustment of the cutting size of the tool (10).

Abstract: A conditioning ring having cutting elements brazed-bonded to the bottom surface of the ring and suitably adopted for conditioning a workpiece polishing pad by contact with the pad. The conditioning ring further includes a flange extending about the bottom periphery of the ring with the cutting elements being attached to the bottom surface of the flange. The flange includes cutout portions for permitting material to escape from the interior of the ring. The cutting elements are distributed substantially uniformly across the bottom surface of the flange and the elements are brazed-bonded to the flange with a braised metal alloy, creating an extremely strong bond between the cutting elements and the flange surface.

Abstract: A cleaning card has a flat, semirigid base with a first and second material mechanically bonded to the side surfaces thereof. The first material is an abrasive substantially impenetrable material and the second material is a soft spunlaced fabric of high absorptive capacity. The differences in physical qualities of the first and second materials allow for one card to be used both as frequent cleaning card as well as a corrective cleaning card and provides a cleaning card that enables operation of the machine quickly after cleaning thereof.

Abstract: Outlet piece for a compressor, which outlet piece contains a damping body (3) applied symmetrically around a passage (2), wherein the passage has a constant diameter and in that the damping body (3) has a transverse dimension which gradually increases along the direction of flow (V), so that this damping body (3) has a transverse thickness which increases along the direction of flow (V).

Abstract: A material cutting shaft assembly in which a rotary shaft of hexagonal shape in cross section carries an array of material cutting discs between its opposite ends, seat means adjacent the shaft ends, and disc retainer means adjustable and removably mounted in the seat means to hold the array of cutting discs in operative positions to avoid axially directed load stress conditions.

Abstract: A cutting compact has a superhard abrasive layer bonded to a substrate layer, wherein the configuration of the interface between abrasive and substrate layers is a non-planar, or three dimensional, interface which increases the surface area between the layers available for bonding and optimizes the structural integrity of the compact according to its desired application. In one embodiment, the topography between the substrate and abrasive layers of the compact is characterized by interlocking concentric circular grooves and channels of varying width, depth and shape. In another embodiment, the interface between the grooves and channels is rounded and smooth. In additional embodiments, the grooves and channels are positioned on substantially angled interfaces or substantially curved interfaces. Additional configurations of the present invention provide that the grooves alternatingly start and stop along the path in interfacing with their respective channels.

Abstract: An injection molded disposable honing tool is made by an injection molding process. The tool has an elongated rectangular base from which projects an elongated section which may be somewhat smaller. The elongated section terminates in a working face. The entire tool may incorporate abrasive therein homogeneously or simply the elongated section which terminates in the working face. A shot of a plastic melt such as nylon is formed with abrasive mixed homogeneously which is then injected into a mold. For higher cost abrasive, a two shot process may be used with one shot being abrasive free. Alternatively, an abrasive-free insert may be placed in the mold before the abrasive mix is injected. The surface of the working face may be formed to act as a working face of closely packed fingers by placing patterns in the mold surface forming the working face, or subsequently cutting the working face, or a combination of both.

Abstract: An improved honing tool including a holder having an open sided cavity located in one side thereof, a sidewall portion extending around at least a portion of the cavity, and one or more elongated filaments of a polymeric material having particles of an abrasive substance dispersed throughout, each of the one or more filaments having an end extending into the cavity, the one or more filament ends being heated sufficiently so as to be softened or melted to conform to the shape of the cavity and intimately engage the sidewall for retaining the one or more filament ends in the cavity. The method for manufacturing the present honing tool includes the steps of applying energy to the holder to heat the holder to a temperature sufficient to soften or melt the one or more filament ends while pressing the filament ends into the cavity so as to conform them to the shape thereof, the holder being preferably heated by induction.

Abstract: A grinding bit for regrinding a component of a constant velocity universal joint which contains a grinding tip, an arbor, and means for removably attaching said grinding tip to said arbor.The arbor has a length of from about 2.0 to about 4.3 inches, the grinding tip has a length of from about 0.7 to about 1.9 inches, and the length of the arbor exceeds the length of the grinding tip by at least about 1.0 inch. The grinding has a head portion with a substantially arcuate shape and has a substrate coated with a abrasive material.

Abstract: A back-up pad for supporting an abrasive article having projecting hooking stems. The back-up pad includes a support member and an engaging means provided on a major surface of the support member for releasably engaging the hooking stems of the abrasive article. The engaging means includes a substrate having a first surface, a second surface, a plurality of loops projecting from the first surface, and an adhesive applied to the second surface. The plurality of loops comprise a continuous strand, the strand including a plurality of loop portions projecting through the substrate from the second side to the first side to thereby form the loops, and a plurality of connecting portions between the loop portions. The substrate is located between the loop portions and connection portions of the strand, and the adhesive adheres the connecting portions of the strand to the second surface of the substrate. Also disclosed is an engaging means for use with a back-up pad, and a method of stitching the engaging means.

Abstract: A tool component comprises an abrasive compact layer bonded to a cemented carbide substrate along an interface. The abrasive compact layer has a working surface on a side opposite to the interface which is flat and which presents a cutting edge or point on its periphery. A recess is provided, that recess extending into the substrate from the interface. The recess has a shape, in plan, of at least two strips which intersect. Examples of suitable shapes are V-shape and cross-shape. Abrasive compact fills the recess and is bonded to the substrate.

Abstract: A cutter for soft materials is described. The cutter is made from a conventional cutting instrument such as a dental drill bit having hard particles embedded in the tip surface. The cutter is ground at the tip end so as to remove particles which leave cavities around the peripheral fiat ground tip end. The open cavities and the sharp edges around them provide an effective cutting edge with which soft materials can be cut in clean even lines.

Abstract: The invention relates to a superabrasive grinding wheel comprising very hard abrasive particles and a binder with a metallic matrix, which also contains "pore-forming" adjuvants, notably hollow beads made of ceramic.This grinding wheel may be used notably for the machining or grinding of glass articles, especially for the grinding of the edges of glass sheets.

Abstract: A diamond drill consists of a core and a pair of abrasive diamond tips which are joined to constitute a diamond tip and core assembly in the form of a flat plate. The diamond tips have chamfering sections for providing a cutting blade of a diameter smaller than that of a cutting blade provided by finishing blade sections thereof. The chamfering sections can be used not only for chamfering an edge of a glass plate defining an opening but for cutting a non-circular opening. In another embodiment, an abrasive diamond ring is installed on a shank and used for chamfering an edge of a glass plate defining an opening or for cutting a non-circular opening having a small corner.

Abstract: A device for rounding the ends of plastic bristles on rotationally symmetrical circular brushes has a tool in the form of a rotationally symmetrical hollow body with an abrasive inner surface, which has an inner contour with an at least zonally smaller cross-section than the circular brush corresponding to the outer contour of the latter and between the circular brush and the tool there is a relative rotary movement and a reversible relative axial movement.

Abstract: A grinding wheel for a grinding tool, includes a grinding wheel core; and a grinding rim which is provided on the grinding wheel core and which is composed of a plurality of grinding micro segments composed of a crushed agglomerate including at least one material selected from the group consisting of metal-bonding or ceramic-bonding materials, and at least one grit material selected from the group consisting of diamond and cubic crystalline borium nitride (CBN), which agglomerate has been one of hot-pressed or sintered without pressure after which the agglomerate has been crushed to provide the crushed agglomerate; and a resin binder for bonding the grinding micro segments together and to the grinding wheel core.

Abstract: A drill head carries a plurality of coaxially mounted drill crowns beginning with a first crown and followed by additional drill crowns which, upon rotation, describe concentric envelope circles of successively larger diameters. The first drill crown has cutting elements with a diamond coating with an average particle size of 200-1,000 .mu.m, and the additional drill crowns have cutting elements with a diamond coating with an average particle size of 200-300 .mu.m. The difference in diameter of succeeding drill crowns is successively small. Alignment of the drill crowns in a pilot hole is achieved by guide elements mounted behind the drill crowns and describing an inner envelope circle which is smaller than the outer envelope circle described by the largest drill crown, thereby defining a radial safety gap into which fluid is fed to form a cushion during rotation.

Abstract: A diamond-set insert carrier tool for dressing, chamfering, smoothing or polishing machines which comprises a body or support of thermoplastic material, in the active surface of which there are provided cavities able to receive diamond-set abrasive inserts or bodies and retain them substantially flush with said active surface by interference, said interference being between 0.1 and 0.3 min.

Abstract: A polishing tool component comprises a carrier and a plurality of spaced abrasive elements located in a surface of the carrier. Each abrasive element presents a working surface having a perimeter which is circular, polygon or of like non-elongate shape, and comprises a mass of abrasive particles such as diamond or cubic boron nitride uniformly dispersed in a bonding matrix. The bonding matrix may be metal, ceramic or polymeric. The working surfaces of the elements together define a working surface for the component. The working surfaces may be located in the surface in which the elements are located, or project beyond that surface.

Abstract: A sander vacuum housing and pad frame system is provided for generating unique, continuous air flow for dust collection in a sander coupled to a dust collection system, while providing the versatility of a pad frame system. The system has particular application to a pad frame system for supporting sanding pads having varying characteristics, but is not limited to such a system. The system comprises a vacuum housing configured to be coupled to a motorized sanding mechanism of a sander for moving the vacuum housing in a sanding motion. The vacuum housing defines the upper portion of a dust channel. The dust channel in the vacuum housing is configured for connection to a dust collection system. The system further comprises a pad frame configured to be coupled under the vacuum housing for moving the lower surface of an attached frame in a sanding motion. The pad frame comprises a sanding pad for supporting sandpaper.

Abstract: Grinding tools are provided having a composite working surface with a metal bonding material coated with a modulated composition of transition metal compounds. Titanium nitride and zirconium nitride are suitable compounds. A manufacturing method for such grinding tools is also provided, employing cathodic arc deposition with transition metal compounds being formed from arcs of transition metal cathodes and a reactive gas.

Abstract: An abrading device comprising two planar members that are disposed in a spaced apart relationship by at least one spacing member, a plurality of abrasive particles distributed over only the outermost surfaces of said two planar members, the space between said planar members being large enough to accommodate and protect the extended fingers of a person using the device.

Abstract: A polishing pad comprises a carrier and layer of a non-porous thermoplastic polymer secured to a surface thereof and containing a mass of discrete abrasive particles, comprising diamond or cubic boron nitride, uniformly dispersed therein. The abrasive particles have a particle size of up to 500 microns and are present in the layer in a concentration of up to 30 volume percent. The layer presents an abrasive polishing surface. The abrasive layer may also comprise a plurality of spaced strips secured to a surface of the carrier and each strip presents an abrasive polishing surface.

Abstract: A portable sharpener for sharpening a blade, which has at least one cutting edge, has an elongated body with a guiding channel where the blade can be inserted therethrough and guide the sharpener along the blade side walls during sharpening. The elongated body has a chamber dimensioned to house and hold an elongated abrasive member. A portion of the abrasive member is exposed through the channel to enable the blade edge to engage the abrasive member. The chamber also has a space to capture the blade filings or fragments. A movable guide having another channel is pivotally secured to the body such that the guide can pivot relative to the body.

Abstract: An article having a hard surface of oriented particles for abrasive or wear-resistant applications is provided and includes a plurality of synthetic single crystals of diamond or cubic boron nitride, or like materials, oriented in a formation so that their corresponding crystallographic directions of maximum hardness, i.e., maximum abrasive resistance, are aligned, whereby the group of crystals, which form a working surface, exhibits a common direction of maximum hardness across the surface, and to a method of making such an article.

Abstract: A honing tool characterized in one form by an elongated rectangular cup element or holder having a bottom interior surface, a bundle of closely packed relatively short discrete generally parallel abrasive containing filaments secured in the holder, and a layer of instant gel adhesive securing all of the filaments at one end face of the bundle to the bottom interior surface of the holder. To make such a honing tool, a measured bundle of uniformly closely packed nonwoven, generally parallel discrete filaments is formed. A holder is supported and a measured amount of gel adhesive is placed in the bottom interior of the holder so that a layer of such adhesive completely covers the bottom of the interior of the holder. The bundle is then promptly driven into the holder so that all of the filaments at one end of the bundle are in contact with the adhesive prior to the curing of the adhesive. The adhesive is then cured.

Abstract: A saw blade possesses a base element onto which boron nitride particles are applied in the cutting region. The boron nitride particles are bonded by means of a metallic bonding layer, which preferably consists of nickel or a nickel alloy with a Vickers hardness of at least 600 HV. The bonding layer is preferably deposited galvanically. The boron nitride particles advantageously possess a particle size of approximately 0.5 to 0.8 mm, preferably approximately 0.6 to 0.7 mm. The saw blade possesses particular advantages for use as a reciprocating saw blade for sawing GGG cast iron pipes with a cement lining and fiber-reinforced cement jacket, resulting in considerably improved cutting performance and service life.

Abstract: A grinding wheel for V-profiling ophthalmic lenses of various diameters, powers and thicknesses has a V-shaped groove circumferentially thereabout which defines a forward V surface and a rear V surface meeting at a nadir of the groove. A rear flat surface tapers outwardly in relation to an axis of rotation of the wheel from a rear edge of the rear V surface toward a rear face of the wheel. The forward V surface is of a first grinding aggressiveness, the rear V surface is of second grinding aggressiveness greater than the first grinding aggressiveness and the rear flat surface is of third grinding aggressiveness substantially greater than the second grinding aggressiveness. In a preferred embodiment, the wheel also has a forward flat surface tapering outwardly in relation to the axis of rotation of the wheel from a forward edge of the forward V surface toward a forward face of the wheel.

Abstract: A cleaning card has a flat, semirigid base with a first and second material mechanically bonded to the side surfaces thereof. The first material is an abrasive substantially impenetrable material and the second material is a soft spunlaced fabric of high absorptive capacity. The differences in physical qualities of the first and second materials allow for one card to be used both as frequent cleaning card as well as a corrective cleaning card and provides a cleaning card that enables operation of the machine quickly after cleaning thereof.

Abstract: A tool for applying surface coated abrasives on a machine for abrasion machining of cylindrical bearing surfaces on workpieces such as crankshaft journals and crankpins comprises for each bearing surface to be machined a pivoted arm mobile vertically and three pads for applying surface coated abrasives. A first pad is mounted at a median top position on the arm and the other two at lateral bottom positions on two jaws articulated to the arm and coupled together so that they can be clamped together so that when clamped onto the bearing surface to be machined the three pads are disposed substantially at the three corners of an equilateral triangle. Each pad has a concave surface coated abrasive application surface subtending an angle of greater than 60.degree. so that after clamping the three pads of each arm enclose the bearing surface to be machined substantially completely.