Abstract: The present invention provides a multi-layered diamond dicing blade. More particularly, the blade is a multi-layered dicing blade comprising an inner layer with a first set of diamond particles and an outer layer overlying the inner layer. The inner layer extends to the outermost periphery of the dicing blade. The outer layer comprises a second set of diamond particles having a size smaller than the first set of diamond particles.

Abstract: A super-abrasive grinding wheel having a core member formed of an aluminum alloy including at least 40% by weight of aluminum, and at least one abrasive layer consisting of super-abrasive grains bonded to at least one surface of the core member, the super-abrasive grinding wheel being operable to perform a grinding operation at a peripheral speed of at least 80 m/s, wherein the core member is at least partially coated with a corrosion-resistant and wear-resistant protective film such as an anodized aluminum film, or a metal film formed by spraying a metallic material in a substantially molten state.

Abstract: A grinding wheel comprising an outer annular grinding portion, and an inner core portion which is located radially inwardly of the annular grinding portion to support the annular grinding portion and which is formed of a composition including as a major component a thermoplastic resin having a specific tensile strength of at least 12. The grinding wheel is manufactured in a process including a step of crushing the core portion of the used grinding wheel into pellets to be reclaimed as a material for the core portion, a step of preparing a composition for the core portion, which includes a mass of the pellets and a fresh thermoplastic resin having a specific tensile strength of at least 12, and a step of forming the core portion by using the composition in a molten state. The process may further include a step of reclaiming the grinding portion of the used grinding wheel.

Abstract: Provided is an abrasive-bladed multiple cutting wheel assembly composed of a plurality of abrasive-bladed cutting wheels and spacers each between two adjacent cutting wheels to define the spacing therebetween on a rotation shaft. While each of the cutting wheels consists of an annular base wheel provided on the outer periphery thereof with an abrasive blade layer containing particles of an abrasive such as diamond particles, the base wheels in the inventive assembly are made from a cemented metal carbide such as tungsten carbide cemented with cobalt having a specified Young's modulus or specified Vickers hardness Hv instead of conventional steel materials so that the thickness of the base wheel can be as small as 0.1 mm and, despite the very small thickness of the base wheel, the cutting wheel assembly serves for the cutting or slicing works of a very hard and brittle material such as sintered rare earth-based permanent magnets with outstandingly high cutting accuracy and durability.

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 supporting disk for a surface grinding wheel comprises a glass-fiber reinforced phenolic resin body which has an upper covering layer of a textile glass fabric or a glass-yarn layer, an intermediate layer of a fiber mat, and a lower covering layer of a textile glass fabric or a glass-yarn layer.

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 polishing apparatus for reducing the roughness and abrasive shedding of coated tapes comprises a cylinder having coaxial channels or grooves of various forms, which are advantageously thread-like. Axial grooves may be additionally provided.

Abstract: A grinding wheel having a main body and a tubular bushing member which is fitted in an inner circumferential surface of a mounting hole formed through the main body, so that the grinding wheel is mounted on a wheel spindle of a grinding machine, with the bushing member being fitted on the wheel spindle. The bushing member includes an urethane resin as a main component thereof.

Abstract: A fine-machining tool, a honing wheel in particular, characterized by an axial laminar structure with a center layer and two exterior layers bonded to each other, the center layer consisting of a plastic material in which cutting grains are embedded, and the outer layers engaged with the two edge areas of the workpiece consisting of ceramically bonded cutting grains.

Abstract: A cylindrical, abrasive grinding wheel having a cylindrical abrasive region with an abrasive surface at an outer circular band thereof. The abrasive region includes layers of abrasive particles. The layers of abrasive particles can be tilted with respect to an axis of rotation of the grinding wheel or they can such that grooving in the grinding wheel and a workpiece ground by the grinding wheel can be reduced. Alternatively, the abrasive region can be formed from a plurality of abrasive segments each having layers of abrasive particles. The layers of abrasive particles can be staggered in the direction of the axis of rotation from one segment to another. This can also reduce grooving in the grinding wheel and workpieces.

Abstract: A disk-shaped grindstone including a base disk and an abrasive layer which is bonded to the base disk. The base disk is provided by a rapidly-solidified aluminum alloy whose major component is Si, wherein the rapidly-solidified aluminum alloy includes 15 wt %-40 wt % of the Si, 0.5 wt %-6 wt % of Cu, 0.2 wt %-3 wt % of Mg, and the balance consisting principally of aluminum. The ratio of a tensile strength of the base disk to a specific gravity of the base disk (tensile strength/specific gravity) is not smaller than 90. The ratio of a fatigue strength of the base disk to the specific gravity of the base disk (fatigue strength/specific gravity) is not smaller than 30.

Abstract: The present invention describes a novel metal bond superabrasive tool that contains a superabrasive such as diamond or CBN grits distributed in a predetermined or an uniform pattern. Such a pattern is produced by fabricating plurality layers of metal matrix with superabrasive grits distributed therein in a predetermined pattern and concentration and subsequently assembling and consolidating the layers into a tool segment. Superabrasive particles may be incorporated during the process of making these layers, or they may be planted afterwards into these layers that contains the metal matrix powder. In the latter case, the planting may be guided by a template with apertures laid in a specific pattern.

Abstract: A fine-machining tool, a honing wheel in particular, characterized by an axial laminar structure with a center layer and two exterior layers bonded to each other, the center layer consisting of a plastic material in which cutting grains are embedded, and the outer layers engaged with the two edge areas of the workpiece consisting of ceramically bonded cutting grains.

Abstract: In the method for the manufacture of dental tools for the treatment of surfaces, a rubber core serving as a carrier layer is first applied by injection molding onto the spindle of the tool, and the abrasive layer comprising the abrasive grains is subsequently applied to the carrier layer. In another method for the manufacture of dental tools for different treatments of surfaces, more particularly for coarse grinding, finishing, and polishing, rubber-elastic masses of different degrees of hardness are used for the abrasive parts of the tools according to the intended treatment, and abrasive grains of the same size are embedded in the rubber-elastic mass of these parts.

Abstract: Surface treating articles and methods for the manufacture of such articles are provided. The articles of the invention comprise a rotatable core; a plurality of surface treating segments, the segments having first ends adjacent the core and second ends opposite the first ends; and a cured, expanded adhesive composition bonding the surface treating segment to the core, the adhesive composition comprising (a) an organic epoxide compound having an epoxide functionality of at least 1, (b) an epoxide hardener, (c) a film-forming material, and (d) a foaming agent; wherein the expanded adhesive provides a substantially continuous bond area extending from the core into and around the first end of the segments.

Abstract: A grinding wheel for use in grinding glass, has an outer periphery of abrasive material secured to a body portion made of a lightweight material.

Abstract: An electrolytic in-process dressing method, an electrolytic in-process dressing grinding apparatus, and an electrolytic in-process dressing grindstone, for grinding workpiece as the grindstone is being subjected to electrolytic in-process dressing, are provided, in which the grindstone is made of abrasive grains and a binding material which is capable of forming a uniform and fine passive layer at the grinding surface thereof and also capable of preventing excessive elusion of the binding material, thereby preventing the formation of chips at the ground surface in the course of grinding operation.

Abstract: Proposed is a cutting wheel bladed on the outer periphery of a base wheel with abrasive particles, e.g., particles of diamond and cubic boron nitride, suitable for cutting of a hard and brittle material such as a sintered block of a rare earth-based magnet alloy with good cutting accuracy and low material loss by cutting. The cutting wheel is an integral disk body consisting of a base wheel of a relatively small thickness made from a cemented metal carbide, e.g., tungsten carbide particles cemented with metallic cobalt, instead of conventional steel materials and a cutting blade formed on the outer periphery of the base wheel which contains from 10 to 80% by volume of the abrasive particles having a specified average particle diameter.

Abstract: A unitary composite abrasive disc for one-pass grinding and finishing of a workpiece comprising a flexible epoxy rim bonded to a rigid core.

Abstract: A new polishing and buffing attachment for applying polish and buffing of objects, especially wheel rims. The inventive device includes a head member having a outer padded layer. The first end of an elongate shank is extended into the interior of the head member from the second end of the head member such that the second end of the shank is outwardly extended from the second end of the head member. A cover member has an interior space and opposite first and second ends. The second end of the cover member has an opening into the interior space of the cover member. The head member is insertable through the opening of the second end of the cover member into the interior space of the cover member such that the second end of the shank member extends outwards from the opening of the second end of the cover member.

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 grinding wheel having a portion of its leading radially extending wall dome-shaped and having a sector thereof coated with a coarse-textured abrasive coating that performs rapid material removal from a workpiece. Radially outward of the coarse sector, the remainder of the radially extending wall and the outer (circumferential) portion are coated with a fine-textured abrasive coating for providing a smooth finish. The working surface of the coarse-textured abrasive coating extends to an outermost radial dimension that is smaller than the radial dimension of the working surface of the finer-textured coating. The differential in dimensions defines the incremental material removal that is accomplished by the fine-textured abrasive coating.

Abstract: This invention relates to a shaper head or rotating matrix which can be used in a process for manufacturing decorative mouldings by contacting a stock material to the rotating shaper head or matrix, such that the shaper head or matrix removes stock material. The resulting moulding is a relief of or has a negative surface in relation to the shaper head. The shaper head is a rotatable matrix comprising an axis and an exterior surface wherein the plane through the exterior surface and normal to the axis is circular and wherein at least two or more of said planes are characterized by different radii and an attaching mechanism for attaching the matrix to a source of rotary motion through the axis of the matrix. The invention also includes a process for manufacturing the mouldings and the mouldings produced by the process.

Abstract: Grinding tool including a basic body symmetric with respect to rotation and a grinding layer deposited on the periphery of said grinding tool. The grinding layer being composed of the grinding grains, bonding agent and occasionally filler and/or wear-changing additives. The outer radius of the annular grinding layer or the extension in feeding direction perpendicular to the axis of the basic body is different, with the physical properties and/or the volume contents of the components of the layer are different in axial direction such that an adaptation to the different grinding load continuously in axial direction is achieved.

Abstract: The invention relates to abrasive grinding wheels with an organic binder, comprising a reinforcement in the form of metal fibers. Preferably, those fibers are in the form of "vitreous" metallic ribbons.The grinding wheels according to the invention are advantageously more durable and more conductive.

Abstract: A method and an apparatus for forming a hemispherical convex mirror surface on the end of a ferrule or optical fiber connector efficiently and accurately. The apparatus has a grinding wheel having a concave work surface, a tool for correcting the shape of the work surface, a stage for bringing the tool into contact with the wheel, a mechanism for causing the end of the ferrule to contact the work surface, and a mechanism for displacing the axis of the ferrule from the center of the curvature of the arcuate section of the work surface. After the axis of the ferrule has been displaced from the center of the curvature, the ferrule is caused to contact the work surface and roughly ground thereby. Subsequently, after the ferrule axis has been brought into alignment with the center of curvature, the ferrule is sequentially finished from the tip to a preselected point thereof.

Abstract: The elastic base grinding wheel for the smoothing and polishing of toroidal contours of hard material comprises a rigid-material support body, which may also be divided into two parts along an equatorial plane in a substantially centered position, has an internal shape suitable for mating operatively with the motor shaft with which it is coupled, and an external shape congruent with that of the contour of the material to be smoothed or polished. At least, a wing at or the end of the support body, is arranged for receiving and holding a coating of elastomeric material injected or vulcanized in situ. The part of the injected coating of elastomeric material directed towards the workpiece is coated with elements of relatively flexible abrasive material, so that the overall contour corresponds to the final shape that must have the workpiece after the smoothing or polishing.

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: The invention relates to an improved grinding wheel for grinding eye glass edges. The grinding wheel comprises a base member and an abrasive coating of diamond and metal. The base member 3 consists substantially of plastic material and an annular member 2 of metallic material is provided between the base member 3 and the coating 1. The metallic material of the annular member 2 has a strength withstanding the forces occuring in sintering the coating to the annular member.

Abstract: A stacked sanding wheel for wooden panels with radical profiles. The sanding wheel has two sanding members stacked atop one another and mounted to a drive means for rotation about an axis. Each sanding member has a relatively rigid backing portion with an outer surface corresponding in profile to one of the surfaces on each side of the profile edge. The flexible sanding strips assume the shape of the outer surface of each backing portion which, in turn, corresponds to one of the surfaces of the profile to be sanded. The separate sanding members are secured to the drive means in a stacked relationship with their separate sanding strips abutting one another to form a sharp edge corresponding to the sharp edge of the wooden panel's profile.

Abstract: An abrasive wheel, in particular an abrasive cutting-off wheel, comprises an annular cylindrical inner support of metal and an abrasive ring surrounding the latter, both being connected with each other. The abrasive ring projects on both sides from the support in the direction of the common axis. The abrasive ring can be ground off completely. The support is re-usable or at least recyclable.

Abstract: A ring-shaped abrasive member is formed of a plurality of sheets of abrasive cloth paper laminated and bonded together. The abrasive member is formed with a plurality of cuts so as to extend inwardly from its outer edge or extend outwardly from its inner edge. On the back of the abrasive member is secured a wheel substrate together with adhesive. The abrasive member is pressed against a workpiece while rotating the abrasive member to abrade the workpiece. The powdery debris and abrasive grains trapped in the cuts will move toward the outer periphery of the abrasive member and be discharged from the outer ends of the cuts. When the topmost abrasive sheet forming the abrasive member gets worn out, the sheet thereunder will be exposed.

Abstract: In a grinding wheel for use in a grinding machine, a plurality of grinding tips are bonded on the outer peripheral surface of a wheel core having a disk-like shape by bond. On both side surfaces of the wheel core are formed with depressions continuous with the outer peripheral surface of the wheel core. Bond is filled between the outer peripheral surface and the grinding chips, and filled in the depressions of the wheel core to form a bonding layer. Namely, the bonding layer has side portions which extends along both side surfaces of the wheel core in a radial direction.

Abstract: A hafnium nitride coating is applied over the cubic boron nitride layer of conventional CBN tools by the process of arc physical-vapor-deposition at temperatures below the tempering temperature of the core metal. The hafnium nitride coating protects the cubic boron nitride or diamond abrasive and the core, resulting in a grinding tool with greater strength and longer life.

Abstract: A grinding wheel assembly for grinding and sizing workpieces such as an elastomeric power transmission belt is provided that comprises a wheel member including an abrasive, annular outer surface, a pair of annular flange members detachably connectable to opposing sides of the wheel member for providing opposing annular flanges that circumscribe and radially extend beyond opposing sides of the outer surface of the wheel member, wherein each of the flanges includes an inner abrasive surface for sizing a workpiece which is substantially coarser than the abrasive surface on the outer surface of the wheel member.