Abstract: A grinding tool for grinding buttons of a rock drill bit includes a spindle having a longitudinal axis of rotation, and a grinding cup mounted on the spindle by a tongue-and-socket connection. A fastener in the form of a coil spring secures the grinding cup to the spindle. The grinding cup can be inserted into the inside of, or around the exterior of, the coil spring. When the spindle is rotated in a working direction, the spring tightens against the grinding cup. To install or remove the grinding cup, the grinding cup is rotated relative to the spindle in a direction corresponding to the working direction, whereby engagement between the grinding cup and the coil spring becomes loosened.

Abstract: An abrasive body which includes an abrasive layer bonded to a substrate along an interface and at least one projection extending from the interface into the substrate. The a projection has an essentially elliptical or circular form in plan and a profile which includes a substantially flat central portion and connecting surfaces joining the central portion to the interface and which slope towards the interface.

Abstract: The present invention is intended to provide a grinding wheel which is prevented from the one-sided wear or the wear taking place intensively at the outer side of the segments due to working load so as to improve the processed quality of the ground surface. Thus the invention proposes a grinding wheel comprising a plurality of segments attached to the underside of a rim part of a grinding wheel, a rim part for supporting the segments, rib parts for connecting the rim part with a disk part, and a disk part with a central hole for connection to a motor-operated tool, wherein the segments are each demarcated into the inner portion and outer portion around the demarcating interface and the outer portions are so treated as to constitute a higher wear resisting region than the inner portions by controlling the particle size and/or the content of the super abrasive and/or by controlling the hardness of the metal bonding material for binding the abrasive particles together, in order to prevent one-sided wear.

Abstract: A tool for smoothing optical surfaces including a rigid support and a generally annular working member which is at least in part axially deformable. The support forms a recessed annular housing and the working member is attached to the support via the bottom of the annular housing but projects beyond the support. Applications include smoothing ophthalmic lenses, whether made from a mineral material or an organic material.

Abstract: A vitreous bonded abrasive article, more particularly a grinding wheel, having improved grinding performance is provided wherein the open pores of the abrasive article contain an impregnant which comprises at least one water insoluble, sulfur bearing organic substance having at least one carbon to sulfur bond, at least about 5% by weight sulfur and a melting point of at least about 30° C. said melting point being at least 10° C. below the decomposition temperature of the substance and selected from the group consisting of substituted and unsubstituted aliphatic, aromatic, cycloaliphatic, alkenyl, alkynyl, alkylaryl, arylalkyl and substituted heterocyclic sulfur bearing organic substances or a mixture of said substances grinding aid. The impregnant is free of a medium, other than the water insoluble, sulfur bearing substance, in which the substance or a mixture of such substances is dissolved or dispersed.

Abstract: A super abrasive tool comprises scattered super abrasive grains fixed on a working surface with a bond layer. The bond layer has a flat surface and protrusions. Each protrusion has one grain and the average height from the flat surface to the top of the grain is in a specific range. A process for producing a super abrasive tool comprises forming in a spacer holes having a cylindrical portion having a diameter smaller than the average diameter of grains at the lower face and a portion having a diameter increasing to a specific value at the upper face; placing one grain in each hole; fixing the grains by forming a bond layer on the upper face of the spacer; and removing the spacer.

Abstract: Described is a mold and die finishing tool comprising a multilayer composite shaft of with an abrasive tip integrally adhered thereto.

Abstract: Abrasive articles (e.g., abrasive wheels) comprised of abrasive particles and polymeric material such as a polymeric reaction product of components comprising saturated polyol, saturated polyisocyanate, and a free radical source, and methods of making and using the abrasive articles.

Abstract: Truing of a grinder is performed by irradiating a laser beam onto abrasive grains on the outermost periphery of the grinder from the tangential direction of the grinder. Truing of the grinder for adjusting the number of working abrasive grains and the shape of the abrasive grains involved in the actual machining is performed under a non-contact condition and at highly accurately, thereby enabling highly accurate and highly efficient machining.

Abstract: An automatic grinding device for sharpening the knives of a forage harvester chopper drum includes a controller including a counter for counting the number of times the grindstone is adjusted toward the chopper drum during sharpening operation. The controller includes a microprocessor having a non-volatile memory in which may be stored a threshold value, determined by the type of grindstone, to which the count of the counter may be compared for generating a signal indicating the degree of wear of the grindstone so that it may be replaced when worn out.

Abstract: In a stepping motor in which a cylindrical magnet 3 which is magnetized in an axial direction is coupled with a rotary shaft and said magnet is clamped with rotor stacks 4, 5 formed by laminating annular magnetic plates the surfaces of which are electrically insulated to form a rotor, and around the outer circumference of the rotor stator cores which are wound with stator coil are disposed, a sleeve 15 is pressed in between the magnet 3 and the rotor stacks 4, 5, and the rotary shaft and interposed therebetween. The cutting operation for the outer diameter during the manufacturing processes is carried out while holding both ends of the sleeve 15, subsequently the rotary shaft is inserted, thereby, regardless of the length of the rotary shaft, the manufacturing processes are carried out to reduce the number of the molds.

Abstract: A diamond cutting wheel is disclosed. The cutting wheel is capable of reducing frictional resistance, maximizing cutting efficiency, preventing the formation of chippings and discharging cut chips effectively, by means of a plurality of depressions formed on its cutting tip and the continued cutting surfaces of the cutting tip. The cutting wheel comprises a core disk and a sintered cutting tip. The sinter is fitted around and welded to the circumferential end of the core disk. A plurality of depressions are formed on the upper and lower cutting surfaces of the cutting tip while being spaced apart from one another. The depressions formed on the upper cutting surface alternate with the depressions formed on the lower cutting surface so as to allow the cutting surfaces to be continued.

Abstract: A vitrified grindstone having a vitrified abrasive structure which has pores and which includes abrasive grains and an inorganic bonding agent that holds the abrasive grains together, wherein 10-95% of a total volume of the pores is filled with a cured resin. The vitrified abrasive structure may further include an aggregate such that the abrasive grains and the aggregate are held together by the inorganic bonding agent.

Abstract: A method or process for making polycrystalline diamond or polycrystalline CBN cutting tools (Superabrasives), which have integral chip-breaking features is disclosed. This method involves pressing a die or other like rigid component against either the outer can cover or the diamond or CBN region directly. This invention provides economical manufacture of diamond chip-breaker tools, while avoiding unnecessary EDM EDG, grinding, or laser processes. This process forms the chip-breaker on the upper surface of the diamond region, during or prior to sintering. This invention permits a wide variety of chip-breaker or other diamond surface features, while minimizing cost and processing steps. Disclosed embodiments include: pressing through the can assembly; pressing within the assembly by introducing a rigid component in the can; and pressing two cans together with an intervening rigid component imposing the desired diamond surface features.

Abstract: A press die for forming a contact of an electrical connector by blanking a metal sheet is disclosed. The die has a die insert for shaving an engaging section of the contact for electrically engaging with a conductive portion of a device mating with the electrical connector so that an electrical connection between the connector and the device is created. A profile of the die insert for the shaving operation is subject to a final finishing process by an ultrasonic machining using a machining agent consisted of diamond particles dispersed in liquid, wherein the diamond particles have a grit size of 8000#. The profile of the die insert has a surface roughness of 0.08 Ra.

Abstract: A burr tool for use with heat shrink tool holders and fittings. The tool comprises a shank fabricated from a heavy metal material. Secured to the shank through a high temperature deposition process is an abrasive material. The shank is constructed out of a heavy metal such that the shank maintains a selected diameter within a prescribed range despite being heated to a temperature necessary for deposition of the abrasive material thereupon. As such, the shank maintains tolerances necessary for the use thereof with heat shrink tool holders and fittings.

Abstract: The present invention provides a superabrasive tools and methods for making the same. In one aspect, superabrasive particles are chemically bonded to a matrix support material according to a predetermined pattern by a braze alloy that contains Cr, Mn, Si, or Al or mixtures thereof.

Abstract: The invention concerns a drilling device (1) for brittle materials with a drill head (2) detachably fixed to a drilling rod (3) by means of a positive-lock connection for transmission of the drilling torque. For its exact relative positioning, the drill head (2) has a conical shape (10) which in the represented operating state engages centrally into a corresponding recess (11) of the drilling rod (3). As a protection against any axial loosening, a fixing device or arrest (15; 20) designed as a hollow nut is provided engaging into a thread (16) of the drill head (2) and into a thread (17) of the drilling rod (3), the threads (16, 17) having countercurrent pitches. By rotating the arrest (15), the drill head (2) and the drilling rod (3) can thus be simply braced against each other or pulled away from each other, the connection enclosed by the arrest (15) having optimum protection from external influences at the same time.

Abstract: An abrasive article having a patterned abrasive surface is provided. In accordance with the present invention, the article comprises a substrate having a first side. A plurality of raised portions are positioned on the first side of the substrate with the raised portions defining recessed areas between each raised portion. A first adhesive layer is applied to the raised portions and an abrasive material is deposited onto the first adhesive layer thereby coating the raised portions of the substrate to form an abrasive coating with the recessed areas remaining free of the abrasive material.

Abstract: A cutting apparatus for creating a convex shape into a piece of wood creating the appearance of an eye. The inventive device includes a concave stone, a plurality of slots within the concave stone, and a drive shaft attached to the center portion of the concave stone. The concave stone preferably includes a layer of a diamond grit material or similar course material for engaging a piece of wood. The shaft is connected within a conventional grinder tool that rotates the concave stone at rotational speeds of up to 45,000 RPM.

Abstract: A method is described for surface finishing complex and simple surface shapes by abrasion of selected zones of surface, leaving contiguous zones unfinished.

Abstract: A grinding ball having a 55 to 65 Rockwell C hardened outer shell of tempered martensite is adapted for use in heavy duty grinding environments.

Abstract: A method of functionalizing a diamond crystal comprises hydrogenating a diamond crystal, chlorinating the hydrogenated diamond crystal; and exposing the chlorinated diamond crystal to a metal precursor. The exposing step deposits a layer of metal on surfaces of the diamond crystals. The diamond crystal formed by the method possesses surface sites that form a strong bond with the layer of metal to prevent separation thereat, and the layer of metal form strong bonds to a matrix material, for example one of a vitreous and metallic matrix. The functionalized diamond crystal can be used in abrasive products.

Abstract: An abrasive molding consisting essentially of inorganic particles having an average particle diameter in the range of 0.005 &mgr;m to 0.3 &mgr;m, and having a relative density in the range of 45% to 90%, provided that pores having a diameter of at least 0.5 &mgr;m are excluded from the molding. The abrasive molding is used for polishing a material to be polished by using a polishing liquid, preferably water or an aqueous solution of an alkali metal hydroxide, which does not contain a loose abrasive grain.

Abstract: A sanding block attachment for a jig saw including a block portion adapted for securement to the reciprocating blade of the jig saw. The block portion has a generally rectangular configuration. The block portion is defined by a long front face, a long rear face, a short top face, a short bottom face, and long opposed side faces. A sheet of sandpaper is removably secured to the long front face of the block portion.

Abstract: A countersink bit for glass has a shaft extending along and rotatable about an axis, a head fixed to the shaft and having a frustoconical surface centered on the axis, a layer of grinding material on the surface, and an axially relatively incompressible plastic body capable of transmitting torque between the surface and the shaft. The plastic body has good damping capabilities so that any tendency of the head to vibrate or chatter is largely eliminated.

Abstract: A grinding wheel assembly includes a grinding wheel having two recesses respectively defined in tow opposite surfaces thereof and a plurality of protrusions extending inward from a inner periphery of each of the two recesses. A first position member is received in one of the two recesses and has first notches for receiving the protrusions therein. A tubular section extend from the first position member and a polygonal section is located on the tubular section. A threaded rod extends from the polygonal section and through a hole of the wheel. A second position member is engaged with the other recess and has second notches for receiving the protrusions. The second position member has a polygonal hole which is engaged with the polygonal section.

Abstract: A tool for simultaneously machining multiple surfaces on a stationary workpiece can include a rotary tool body having multiple cutter assemblies spaced circumferentially around the tool body. Different ones of the cutter assemblies can include differently angled cutting elements for machining different frusto-conical surfaces in the workpiece. At least some of the cutting elements can have two separate cutting edges.

Abstract: The present invention relates to coated silicon nitride based cutting tools and a method of making the same. By a carburizing heat treatment prior to the deposition of the coating, an improved bonding strength of the coating is obtained. A continuous or semicontinuous transition zone of 2-10 &mgr;m thickness is formed between the substrate and the inner layer of the coating in which transition zone the glass phase is replaced by the material of the inner layer.

Abstract: A material removing tool, such as a cutting or grinding tool, adapted to be oscillated by the output shaft of a manually operable motor-driven apparatus, is provided with at least one elongated cutting edge defined by teeth or analogous cutting elements arranged in at least one at least substantially straight linear array.

Abstract: An abrasive tool insert if formed from a substrate having a face and a continuous abrasive layer having a center, a periphery forming a cutting edge, being integrally formed on the substrate, and defining an interface therebetween. The interface is formed in a sawtooth pattern of concentric rings extending from said center to the periphery. Radially outwardly sloping troughs extending from the center to the periphery are superimposed on the concentric rings. The profile of the interface slopes downwardly from the center to the periphery. The abrasive layer advantageously is diamond and the substrate advantageously is metal cemented carbide.

Abstract: A superabrasive tool such as a superabrasive grindstone (101; 102), a superabrasive dresser (103; 104; 105) or a superabrasive lap surface plate (106) includes a base (20) of steel and a superabrasive layer (10) formed on the base (20). The superabrasive layer (10) includes superabrasive grains (11) consisting of diamond grains, cubic boron nitride grains or the like and a holding layer consisting of a nickel plating layer (16) and a bond layer (17), or a brazing filler metal layer (18), holding the superabrasive grains (11) and fixing the same onto the base (20). Grooves (12) or holes (14) are formed on flat surfaces (19) of the superabrasive grains (11) exposed from the holding layer (16, 17; 18). The holding layer (16, 17; 18) holding and fixing the superabrasive grains (11) so that the surfaces of the grains are partially exposed is formed on the base (20).

Abstract: A grinding wheel having dust discharge-impelling blades which are able to impel to discharge the dust produced during the grinding operation to a dust collection machine to decrease dispersing dust in the air, and increase the cooling efficiency of the grinding wheel to enhance the grinding ability and the life of the grinding wheel. The grinding wheel of the present invention comprises a shank for connecting with a shaft of electric motor, having a plurality of dust discharging holes disposed at given intervals in the shank and a plurality of dust discharge-impelling blades disposed between the dust discharging holes for impelling to discharge dust produced during the grinding operation through and in cooperation with dust discharging holes, and a plurality of grinding tips disposed fixedly at predetermined intervals on the lower surface of the circumferential portion of the shank by means of welding or joining.

Abstract: A grinding wheel for seeing the underside of the object being ground. The grinding wheel includes a grinding wheel. The grinding wheel has a peripheral edge. The grinding wheel has an axis having a hole therethrough. The peripheral edge has a plurality of slots therein extending toward a center of the grinding wheel. Each of the slots is equally spaced from each other.

Abstract: A tool component is provided which has particular application in mining picks and drag bits. The component comprises an abrasive compact having a flat working surface presenting a cutting edge around its periphery, and an opposite surface bonded to a cemented carbide substrate along an interface. A recess is provided which extends into the abrasive compact from the interface and is filled with abrasive compact. The recess has a central portion and an outer portion which completely surrounds, and is shallower than the central portion. The central portion defines, in plan, at least one substantially wedge-shaped configuration, the configuration having a narrow end coincident with a side surface of the component and the sides extending into the component and diverging from the narrow end.

Abstract: A tool for machining workpieces, specially metal workpieces, by cutting, e.g., grinding, polishing, milling, separating or honing, comprising at least one stock-removing tool portion and whose machining range consists of a composite material containing a hard material. Said tool is characterized in that the composite material is formed by a fiber structure consisting of substantially continuous fibers made of carbon and/or a ceramic material and by a matrix containing carbon and hard material, and is also characterized in that at least the machining range, like the cutting or milling tool, is made of said composite material.

Abstract: The invention relates to a composite honing ring comprising a honing part and a carrier part, whereby both components are made of different materials and can contain plastic resins in particular. The invention is characterized in that the abrasive honing part (1) has a low porosity, especially less than 5%, and preferably contains fibrous reinforcing elements. The carrier part has higher elasticity than the honing part. Since the carrier part is elastic, it damps machine vibrations and bearing vibration received by said carrier part.

Abstract: A work chamfering apparatus includes a work holding portion. The work holding portion includes a work table and a clamper. The work table has an upper surface having two end portions each formed with holding grains projecting out of the upper surface. The two end portions of the upper surface of the work table have a static friction coefficient greater than 0.1, which is greater than that of a center portion. When chamfering, first, the work is held by the work table and a generally U-shaped member of the clamper. At this time, the two end portions of the upper surface of the work table contact a lower surface of the work, whereas lower surfaces of respective end portions of the U-shaped member contact an upper surface of the work. In this state, a rotating center of the work is between the lower surfaces, and the lower surfaces are apart generally equally from the rotating center.

Abstract: The invention provides individually made abrasive discs with the primary abrasive surface around the periphery of the disc where the bulk of the abrading action occurs when the disc is in use. The invention also provides a process by which these discs can be made using a unique grain feeding technique which is capable of depositing abrasive grain on a backing surface accurately and in annular patterns.

Abstract: An abrasive cutter formed of at least one diamond particle, preferably at least one mono-diamond crystal and metallic binder material distinguished by the fact that the diamond particle (D) has a size of about 50 &mgr;m to about 500 &mgr;m and each diamond particle (D) is enclosed by a coating (H) produced in a fluidized bed with the coating having a wall thickness of about 10 &mgr;m to about 200 &mgr;m. The volume of the coating (H) constitutes at least 30% of the volume of the diamond particles (D) in the fully consolidated state following individual sintering of the coated diamond particles (D, H). The abrasive cutters can be applied directly onto an abrasive tool. Further they can be processed to form composite cutters or cutting segments. In the method of forming the abrasive cutter, the diamond particle (D) is brought into a fluidized bed reactor and enclosed in a metallic coating (H).

Abstract: A drilling tool including a shank having a chuck end adapted for being held in a chuck of a drill, and an opposite, bifurcated end formed with a bore, the bifurcated end including two portions separated from each other by a gap, an abrasive annulus formed at least partially around the bifurcated end, and a wedge member slidingly disposed in the bore, the wedge member operative to push the two portions away from each other when moved towards the chuck end.

Abstract: An abrasive tool includes an electroformed layer having superabrasive grains electroplated on an outer surface of the electroformed layer, and a plurality of dimples arranged on the outer surface of the electroformed layer using a mold with projections made of gel adhesive. The concentration of the abrasive gains is regulated by changing the number of the dimples (i.e., changing a dimple-area-rate). The gel adhesive preferably has a viscosity of 500,000 cP or smaller. The dimple-area-rate is preferably from 7 to 70%.

Abstract: The present invention discloses a new surface geometry of a polycrystalline diamond (PCD) cutter whereby large chips are prevented from forming in front of the cutter. The surface geometry includes recess(es) and/or raised region(s) that can act as chip breakers and also increase turbulence in the flow across the face of the cutter and thus increase the Heat transfer coefficient and reduce drag. PCD surface's geometric configuration is formed in the high temperature/high heat (HT/HP) process and is therefore integral with the cutter. This invention thus provides a polycrystalline cutter with improved cutting capability by preventing chip build up and enhanced heat transfer resulting in a cooler cutting edge temperature.

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 core bit includes a tube (2) having an opening end surface (21) in the axial direction and a plurality of tips (3) fixed to the opening end surface (21) of the tube (2). Each of the tips (3) includes an abrasive grain layer (31) that contains diamond abrasive grains and a binder for bonding the diamond abrasive grains to each other. The diamond abrasive grains contain not more than 0.03 weight % of inclusions. The inclusions contain iron and nickel as main components. The binder contains at least 0.1 weight % and not more than 2.0 weight % of graphite. The core bit has a short perforation time, i.e., a high cutting speed, excellent sharpness, excellent durability, and a long life. The core bit is suitable for boring a concrete structure.

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: Perforated sheet steel or wire mesh to which tungsten carbide grit is copper braze welded to provide a device which can be cut to a desired size and shaped into or used as a substrate for tools used for sanding, filing, grinding, deburring, deflashing, cutting, sawing, filing and the like. The sheet steel being perforated provides apertures or recesses wherein removed material can collect and/or pass through reducing the clogging of the grit and frequency of cleaning the working surface of the tool or device. The apertures also provide for the flow of air, cooling the device in certain applications. Tungsten carbide gritted wire mesh is particularly good in providing a surface which tends to renew itself due to grit adhering to the side of the wire strands but not such as to clog the holes. Welding the grit to the wire mesh or cloth also causes the strands of the cloth to be welded together providing for a strong, yet flexible device or substrate.

Abstract: The present invention provides a composite bond wheel that has both excellent wear resistance and self-edging properties. The composite bond wheel of the invention includes: a grain layer including abrasive grains and a bonding phase; wherein the bonding phase includes a metal bonding phase and a resin bonding phase, wherein said metal bonding phase includes a metal having the abrasive grains and outside-opening pores dispersed therein, and wherein at least a portion of the outside-opening pores are filled with a resin of the resin bonding phase.

Abstract: A superelastic endodontic instrument, such as a file, is formed by grinding a superelastic wire to form a file preform or blank, and rotating a first end of the blank while preventing rotation of a second end of the blank. The file blank is maintained in the austenite phase at least until twisted to form a stress induced martensite which is plastically deformed by the twisting. A heat treatment step may be performed prior to twisting, during twisting or after twisting of the preform. The file blank may be heated by electrical heating methods or by submerging the blank in a heated liquid.

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.