Abstract: A cutting segment for a cutting tool used for cutting or drilling a brittle workpiece, such as stone, brick, concrete and asphalt, a method of manufacturing the segment and a cutting tool provided with the segment are disclosed. The segment comprises a plurality of plate-shaped metal matrix layers laminated perpendicular to a cutting surface of the segment while being parallel to a cutting direction of the segment, the plate-shaped metal matrix layers being integrally combined with each other and made of a ferrous or non-ferrous material; and diamond particle layers arranged between the plate-shaped metal matrix layers such that diamond particles can be provided in an array on the cutting surface. The segment has an excellent cutting capability, and can be made by a simplified manufacturing process, thereby remarkably reducing manufacturing costs.

Abstract: An improved circular saw blade designed for cutting fiber cement workpieces, which are becoming more and more prevalent on the construction site, includes a PCD/carbide tip (16) mounted in the rim (31) of the saw blade (10) at six, rather than the usual for locations, equally spaced around the blade. The tips are mounted adjacent a relatively large-diameter, semi-circular gullet (20), which itself is preceded by a chip and dust minimizer (18). The minimizer includes several alternating hills (52) and valleys (54) formed in the rim of the saw blade, each hill and valley having the same radius, producing a sinuous array essentially centered on the rim of the blade. It has been discovered that such a dust and chip minimizer reduces the level of dust and chips produced by the blade and clears the same from the kerf generated in the blade-workpiece interface.

Abstract: An abrasive cutting-off wheel for stationary use is comprised of two partial abrasive wheels which are joined to each other. Each of these partial abrasive wheels comprises an interior supporting disk and a radially adjoining interior layer of abrasive grain. It further comprises an exterior layer of abrasive grain and an exterior supporting disk which is located radially there-within. A reinforcement layer is provided between the supporting disks and the layers of abrasive grain. Another reinforcement layer can be disposed between the supporting disks and the interior layers of abrasive grain.

Abstract: In relation to a blade cutting stone or concrete, a blade, preventing wearing of a core while preventing the core from wobbling, cuttable at a stable speed is provided. In a blade formed by providing slots on the outer peripheral edge of a circular core and fixing a superabrasive layer to a portion of the outer peripheral surface of the core located between the slots, the superabrasive layer consists of a first superabrasive layer having an extension formed by partially extending the superabrasive layer toward the inner periphery of the core and a second superabrasive layer.

Abstract: The invention is based on an insertable tool with a rotationally driven disk-shaped hub (10, 12), to which a grinding means (14) is secured in the radially outer region. It is proposed that the hub (10, 12) is embodied with a flexural strength that varies in the radial direction.

Abstract: A graphite block cut into slabs by a sawing device comprising a plurality of generally parallel, spaced-apart blades with each of the blades having a plurality of cutting segments mounted thereon, each of the cutting segments comprising a continuous phase impregnated with a superabrasive material selected from one of natural diamond, synthetic diamond, cubic boron nitride, and combinations thereof; wherein each of the granite slabs as cut from the block has a surface roughness Ra of less than 500 ?-in, and with thickness variation of 2 mm or less from a nominal slab target.

Abstract: A super abrasive impregnated singulation saw blade is made by depositing grindable friable super abrasive particles while electro depositing or electroless depositing a strong binder metal such as nickel on a form or mandrel. The deposited super abrasive on the upper side protrudes from the side of the blade and are ground down to or near the binder metal to plannerize the sides of the saw blade and true and balance the saw blade. Post operations include electro polishing to expose equal amounts of super abrasive on the cutting edge or on all sides. Antifriction particles may be added in the side walls or deposited on the outside.

Abstract: A horizontal frame saw is equipped with a plurality of generally parallel, spaced-apart blades for cutting granite. Each of the blades has a cutting edge with diamond cutting segments mounted thereon for engaging the granite with a swinging motion for cutting of the granite, wherein the segments have optimized/controlled segment variables for uniform wearing of the segments along each blade during cutting of granite. Segment variables include one or more of: spacing of segments along the length of the blade; diamond concentration in each segment; diamond grade (as measured by compressive fracture strength) in each segment; segment composition (bond, secondary abrasives); or segment dimensions.

Abstract: An abrasive cutting blade is provided to achieve high-quality surface finishes at high feed rates. The blade is fabricated by electroplating fine abrasive onto a steel cathode disc to form a first layer, followed by electroplating a second layer of coarser abrasive onto the first layer. A third layer of fine abrasive is then electroplated onto the second layer. The resulting composite is then removed from the cathode disc to form a multi-grit, multi-layer, hub-less blade.

Abstract: A rotary cutting saw includes a base disk; and a plurality of abrasive segments which are fixed to an outer circumferential surface of the base disk, and which have respective outer surfaces cooperating with each other to constitute an outer circumferential surface of the rotary cutting saw; wherein each of the abrasive segments has at least one recess opening in the outer surface thereof; wherein each of the at least one recess has a radially outer portion and a radially inner portion which is located inwardly of the radially outer portion as viewed in a radial direction of the base disk; and wherein the radially outer portion has a width that is constant in the radial direction, and the radially inner portion has a width that varies in the radial direction.

Abstract: A rotary cutting saw including: (a) a base disk which has a plurality of apertures formed therethrough and opening in axially opposite end surfaces thereof; (b) a plurality of abrasive segments which are fixed to an outer circumferential surface of the base disk; and (c) a plurality of axial-runout restraining members which are received in the apertures. Each of the axial-runout restraining members has a size which is smaller than a size of each of the apertures, such that a clearance is defined between the periphery of each of the apertures and a corresponding one of the axial-runout restraining members which is received in the each of the apertures. A ratio of a size of the clearance to the size of each of the axial-runout restraining members is 5–150%.

Abstract: A saw blade for medical, in particular surgical, applications having a recess for mounting the saw blade inside a saw which exerts an saw movement, especially an oscillating saw movement, to the saw blade. In order to improve the dynamic behavior of the saw blade, longitudinal flat areas of a surface of the saw blade are provided with a plurality of superficial impressions of a defined contour that are aligned at an angle to the longitudinal axis of the saw blade.

Abstract: This invention relates to an abrasive cutting tool comprising: i) a substrate surface having a plurality of teeth extending therefrom, and ii) a single layer of abrasive grains chemically bonded to at least a portion of each tooth to define a plurality of cutting levels parallel to the substrate surface, the cutting levels comprising a first uppermost cutting level and a second uppermost cutting level, the grains having a predetermined concentration, size and toughness, whereby the abrasive cutting tool has a cutting surface with a negative angle of inclination with respect to an intended direction of cutting.

Abstract: An enhanced and improved diamond circular saw blade of an invention is disclosed. The invention includes welding and jointing of the periphery of a circular steel blade having an axle bore and a plurality of arc-shaped copper alloy metal-sheets. Each arc-shaped copper alloy metal-sheet includes a plurality of openings, which provide the space required to accommodate a plurality of diamond particles. The width of an opening is somewhat wider than the diameter of an individual diamond particle. When the diamond particles are placed inside each opening of the copper alloy metal-sheets, a pair of molds is used to compress the top and the bottom of a plurality of metal teeth between adjacent openings simultaneously. By compressing this pair of molds, the metal teeth between adjacent openings are deformed, so as to squeeze along the direction of these openings and to enclose and hold the diamond particles. As a result, the surface is of an indentation-shaped saw plate.

Abstract: A method and system for dicing a semiconductor wafer providing a structure with greatly reduced backside chipping and cracking, as well as increased die strength. Semiconductor chip structures obtained from wafers diced according to this invention are also encompassed.

Abstract: A method and apparatus for providing radiused corners on a crack control groove is provided. A radius on the two opposing corners of the crack control groove is simultaneously formed by inserting a pilot segment of a rotating cutting blade into the groove to chase the groove with the blade. The cutting blade has side cutting segments on opposing sides of the pilot segment. The side cutting segments have a concave shape with abrasive material thereon and are located and sized to cut a predetermined radius on the opposing corners 32. Convex shaped shoulder segments inhibit the formation of a well if the blade cuts too deeply. The pilot segment advantageously has no abrasive on its sides so it does not widen the groove, and the pilot segment is shorter than the depth of the groove so it does not deepen the groove.

Abstract: A saw blade for cutting hard workpieces, such as concrete or stone, characterized by improvement of the shape of a shank of the saw blade providing a plurality of cutting tips of the saw blade with a rotational force while the cutting tips are securely attached to the shank. The saw blade comprises a disc-shaped shank having an insertion hole formed at the center thereof, through which a rotating shaft of an electric-powered tool is inserted, and wave-shaped portions formed over a prescribed portion of the radius of the disc-shaped shank, and a plurality of cutting tips attached to the outer circumference of the shank for cutting a workpiece. The wave-shaped portions are spaced a prescribed distance from each other and alternately arranged on the front and rear surfaces of the disc-shaped shank. The prescribed portion of the radius of the disc-shaped shank is at a distance from the center of the insertion hole. The cutting tips contain particles of high hardness.

Abstract: A cutting tool for cutting hard rock, the cutting tool including one or more cutting elements each including a pointed or chisel-shaped body including a diamond composite material including diamond crystals bonded together by a silicon carbide matrix, the each cutting element being mounted into a supporting matrix including a metal matrix composite material, such that the point or chisel edge of the each element protrudes from the matrix.

Abstract: A stabilizing collar for a concrete saw blade provides a rigid blade structure for smoother cutting operations, particularly in partially cured concrete. A pair of the present collars are secured to the blade shaft on each side of the blade, clamping the blade securely therebetween. Each collar has a slightly recessed central area and a raised toroidal rim therearound. Clamping the blade and collar assembly tightly on the shaft, compresses the recessed areas and clamps the rim portions of the collars tightly against the blade at some distance outward from the shaft, thereby providing a rigid assembly and essentially eliminating lateral vibration and flexing of the blade. This enables an otherwise conventional concrete saw to be used for cutting “green” concrete, i.e., relatively soft concrete which has only partially cured, without risk of spalling and breaking up of the edges of the cut due to blade vibration thereagainst.

Abstract: A grinding wheel of segmental type including an inner cylindrical core portion, and an outer grinding portion consisting of a plurality of segments which have abrasive layers formed of abrasive grains bonded together with a glass bonding agent and which are bonded to an outer circumferential surface of the core portion with a synthetic resin layer interposed therebetween, wherein a linear thermal expansion coefficient ?seg (/° C.) of the segments and a linear thermal expansion coefficient ?cor (/° C.) of the core portion satisfy a formula |(?cor??seg)|?6×10?6.

Abstract: A saw blade of uniform abrasive segments with undercut protection to prevent loss of segments and to extend blade life. A metal core includes a uniform peripheral contour formed as a series of spaced apart, segment mounting sections separated by radial gullet channels. A diamond cutting segment is securely bonded to each such mounting section at a bonding interface between the segment and the metal core. Adjacent the ends of each segment on opposite sides of successive gullet channels, are upstanding ears which at least register with and extend through the radial arc of the bonding interface between the segments and the metal core. Both the upstanding ears and the region beneath each segment are preferably overcoated with a wear protection material such as carbide. The overcoated region beneath each segment includes a contoured edge to assist in directing swarf away from the cutting groove.

Abstract: A dressing wheel has a disk-shaped base body centered on an axis and formed with an annular groove also centered on the axis and having an inner surface. A multiplicity of abrasive elements distributed along the groove are in direct contact with the groove inner surface. Matrix powder fills the groove between the elements and between the elements and the groove surfaces. A hardened infiltrating agent, e.g. solder, fills interstices of the matrix powder.

Abstract: An abrasive wheel is used to separate individual laminated chips from a strip by cutting through the copper bridging elements. The abrasive wheel is made up of abrasive particles bonded in a matrix having a high glass transition temperature and a cutting edge having a maximum thickness of the order of 350 micron, whereby the cut is substantially straight and free of smears and burrs.

Abstract: A cutting disc core for a circular shaped saw blade which has a circular shaped body which has a center hole and a circular peripheral edge upon which is to be mounted a plurality of spaced apart cutting segments that is to perform the cutting of the saw blade. Surrounding the center hole and formed within the body are a plurality of slits with there being a solid tab that is integrally connected to the body located between each directly adjacent pair of slits. The tab constitutes a frangible seal with the circular ring or bushing which is formed about the center hole to be removable by being forcibly physically separated from the body.

Abstract: A tuck pointing blade includes at least two saw blades, each having multiple slots positioned radially around a perimeter, and a gap between a perimeter cutting surface of each adjacent saw blade. Each saw blade is arranged so that the multiple slots are offset relative to the multiple slots in each adjacent saw blade. In addition, the tuck pointing blade can be configured with three or more saw blades including adjacent blades having different physical properties and/or materials.

Abstract: A circular cut-off saw blade with a circular body having a peripheral edge, a plurality of curved slots spaced along the peripheral edge, each slot having an open outer end connecting with the peripheral edge, and defined by essentially parallel, continuously-curved sidewalls leading away from the peripheral edge, and cutting segments fixed to the peripheral edge between each pair of adjacent slots.

Abstract: A metal matrix composite (MMC) material machining tool and a method for forming such a tool. In one embodiment, the MMC machining tool of the present invention is comprised of a support disk. In this embodiment, the MMC machining tool is further comprised of a plating material which is bonded to at least a portion of the support disk. The present embodiment further recites a plurality of diamond particles coupled to the plating material such that the plurality of diamond particles are securely plated to at least a portion of the support disk. In this embodiment, the plurality of diamond particles are securely plated to the support disk in a manner such that the plurality of diamond particles are adapted to machine metal matrix composite material.

Abstract: Superabrasive tools and methods for the making thereof are disclosed and described. In one aspect, superabrasive particles are chemically bonded to a matrix support material according to a predetermined pattern by a braze alloy. The brazing alloy may be provided as a powder, thin sheet, or sheet of amorphous alloy. A template having a plurality of apertures arranged in a predetermined pattern may be used to place the superabrasive particles on a given substrate or matrix support material.

Abstract: A spring loaded diamond shaped arbor for use in a saw blade. The arbor includes comprised of a diamond shaped plate having four peripheral side walls with four corners therebetween that separate the four side walls. The arbor has a central opening that is configured and adapted to allow the arbor to be attached to a power tool. A slot extends from the central opening through one of the side walls or corners so that the arbor can easily be inserted into and removed from a saw blade. The slot allows the arbor to be compressed like a spring and be retained within the central opening in the saw blade.

Abstract: Sintered metal bonded segments with an abrasive action, and containing particles of hard material, for tools for machining or cutting hard and/or brittle materials with a tool support which accommodates the sintered metal bonded segments, which are made up of individual segment modules.

Abstract: A rotating blade for a cutting machine having a new arbor mounting hole. The arbor mounting hole has five sides arranged in a cut gem configuration. The arbor mounting hole is symmetrical on either side of a mid-line. However, the mid-line of the arbor mounting hole need not pass through the geometric center of the blade. Inserts are provided. The inserts fit into the arbor mounting hole. Each of the inserts defines an aperture for receiving a drive arbor of a different configuration. The apertures are off-set in the inserts, to compensate for the off-set arbor mounting hole, so that the apertures are disposed at the geometric center of the blade when any insert is placed in the arbor mounting hole.

Abstract: A saw blade of uniform abrasive segments with undercut protection to prevent loss of segments and to extend blade life. A metal core includes a uniform peripheral contour formed as a series of spaced apart, segment mounting sections separated by radial gullet channels. A diamond cutting segment is securely bonded to each such mounting section at a bonding interface between the segment and the metal core. Adjacent the ends of each segment on opposite sides of successive gullet channels, are upstanding ears which at least register with and extend through the radial arc of the bonding interface between the segments and the metal core. Both the upstanding ears and the region beneath each segment are preferably overcoated with a wear protection material such as carbide. The overcoated region beneath each segment includes a contoured edge to assist in directing swarf away from the cutting groove.

Abstract: A grinding wheel which is to be rotated about its axis for grinding a workpiece, including: (a) a base disk; and (b) a plurality of abrasive segment chips which are fixed to the base disk such that the abrasive segment chips are arranged on a circle having a center at an axis of the base disk, and which have respective circumferential lengths as measured in a circumferential direction of the base circle, wherein the plurality of abrasive segment chips includes at least two abrasive segment chips having the respective circumferential lengths which are different from each other, and wherein the abrasive segment chips are arranged with substantially no gap between each pair of the abrasive segment chips which are contiguous to each other in the circumferential direction.

Abstract: The invention relates to a diamond saw blade which is made by attaching improved undercut preventing tips, produced by diffusing and joining cobalt-based powder onto ultra hard tips at a high temperature, to respective shank slot walls formed on the circumference of a diamond saw blade by means of laser welding in order to remove drawbacks of high cost or insecurity with the conventional art.

Abstract: The present invention relates to a blade ring saw assembly in which the blade is a narrow, flat-sided metal ring having a radial width at least twice, and preferably four to six times, its thickness and has a diamond abrasive coating covering its outer peripheral edge and a portion of each sidewall of the ring. The blade ring is supported on a base from beneath the working surface, and projects upwardly to expose more than one-half of the blade ring for cutting of hard and thick workpieces, such as tile and stone, including both curved cutting and straight cutting. The blade ring is supported beneath the work surface by a plurality of roller guides above its radially inner edge and an endless drive belt having a run that extends beneath the blade ring so as to both support and drive the blade ring.

Abstract: Rotary saw blades (1, 17, 18) for use on a power saw are disclosed for cutting and sanding materials simultaneously. The rotary blades have abrasive sanding means (10, 11) affixed to each face of the blade to accomplish the sanding process. The abrasive means may take the form of donut-shaped abrasive pieces (10) affixed radially inward of blade cutting teeth (3) on each face of the blade or a plurality of abrasive pieces or disks (11) attached to various locations on both faces of the blade. The plurality of abrasive pieces may consist of different grades of sand paper with the heavier grades of paper being radially nearest the teeth and finer grades inward so that the material when cut may be gradually sanded and polished as the cutting occurs. One embodiment provides rotary blades (17, 18) with recessed areas (12, 15) for fixing thicker pieces of adhesive means or for use when the kerf width (9) of the blade teeth (3) is less.

Abstract: A cutter wheel for forming scribe lines on a brittle plate has a disk with two side planes. The disk has an edge formed at the outer periphery of the disk and a shaft hole formed at the center of the disk for inserting a rotational shaft. Further, at least one groove is formed to extend from a surface of one of the side planes along the shaft hole.

Abstract: A segment type diamond tool, used for cutting or drilling brittle substances, such as stones, bricks, concrete structures, or asphalt structures, is disclosed. In the diamond tool, the segments are each set with diamonds in a single-layered structure or a multi-layered structure, and are alternately or intermittently arranged on a steel core, different from conventional diamond tools having segments randomly set with diamonds. Such a diamond arrangement of this invention allows the diamonds to more effectively perform their cutting action, and so the diamond tool has an increased cutting rate, in addition to reducing the amount of fine debris generated during a cutting or drilling process to ill-affect worker's health or cause environmental pollution.

Abstract: The present invention relates to an apparatus for cutting a wafer, wherein the wafer cutting process is performed along a back side of a wafer, a semiconductor chip being formed on the front side thereof, by cutting the wafer along the back side of the wafer by directly recognizing the semiconductor chip shape formed on the front side of the wafer thereby minimizing cutting defects due to sawing blade misalignment. The present invention includes a hole formed in the center portion of a chuck table on which the wafer, which is facing down, is attached and a camera installed under the hole of the chuck table. After the wafer is properly aligned by the camera recognizing the semiconductor chip shape formed on the front side of the wafer, a wafer cutting process is performed by a sawing blade.

Abstract: A rotary cutting saw including (a) a base disk and (b) a plurality of abrasive segments fixed to an outer circumferential surface of the base disk and are spaced apart from each other in a circumferential direction of the base disk. The base disk has a plurality of slits which are formed in the outer circumferential surface of the base disk and are located between adjacent ones of the abrasive segments in the circumferential direction. Each slit extends inwardly in a radial direction of the base disk from the outer circumferential surface of the base disk. Each of the abrasive segments includes abrasive grains and wear-resistant grains each of which has a size substantially equal to a size of each of the abrasive grains. The wear-resistant grains are exposed on a side surface of each abrasive segment and are regularly arranged on the side surface.

Abstract: A cutting blade having an annular cutting edge portion composed of electroformed abrasive grain layers in which abrasive grains are fixed by electroforming, the annular cutting edge portion being composed of a central electroformed abrasive grain layer and outer electroformed abrasive grain layers formed on both sides of the central electroformed abrasive grain layer. The central electroformed abrasive grain layer is an abrasive grain layer having a low concentration and the outer electroformed abrasive grain layers are each an abrasive grain layer having a higher concentration than the central electroformed abrasive grain layer.

Abstract: Methods for orienting fibers and an apparatus for orienting fibers are provided for the fabrication of improved thin abrasive wheels utilizing uniform non-woven fiber reinforcement discs. The wheels are more resistant to hub push-out failure during grinding than wheels reinforced with woven fiber cloth.

Abstract: A dressing wheel has a disk-shaped base body centered on an axis and formed with an annular groove also centered on the axis and having an inner surface. A multiplicity of abrasive elements distributed along the groove are in direct contact with the groove inner surface. Matrix powder fills the groove between the elements and between the elements and the groove surfaces. A hardened infiltrating agent, e.g. solder, fills interstices of the matrix powder.

Abstract: The present invention relates to an outer-diameter blade, an inner-diameter blade and cutting machines which respectively use the outer-diameter blade and the inner-diameter blade for cutting hard material, such as metal, ceramics, semiconductor single crystal, glass, quartz crystal, stone, asphalt or concrete, and a core drill and a core-drill processing machine which drives the core drill for forming a hole in the hard material.

Abstract: A core drill having a shank and a cup shaped base metal section constructed of a disk shaped top wall and a cylindrical side wall provided on a fore-end of the shank. A grinding stone portion is mounted on an outer end part of the base metal section, with abrasive grains fixed to the outer end part of the base metal section. Abrasive grain layers are formed in a spiral pattern on inner and outer side surfaces of the cylindrical side wall of the base metal section, with abrasive grains fixed to the inner and outer side surfaces of the cylindrical side wall thereof. When the grinding stone portion is put into rotational contact with a workpiece, the workpiece is ground through to form a circle hole in section leaving a cylindrical core therein.

Abstract: A cutting tool, includes a disc-shaped base member (1), a plurality of ring segment-shaped cutting regions (2) provided at a circumference of the base member (1) separated circumferentially by recesses (4) open at an outer contour of the base member (1) and extending radially through respective cutting regions (2), and at least one elongate opening (5) located in each section (A) of the base member (1), which is defined by a respective cutting region and is limited by two imaginary liens extending from the center (C) of the base body 1 and passing through adjacent recesses (4), and by the central bore (3) of the base member (1), with the opening (5) extending radially along a section of an imaginary spiral line starting from a center of the base member (1).

Abstract: A cutting machine of a type having bellows means disposed at least on one side of a chuck table to be reciprocated. A protective sheet covering the upper surface of the bellows means is disposed. One end of the protective sheet is reciprocated in accordance with the reciprocation of the chuck table, while the other end of the protective sheet is connected to winding means. When the chuck table is moved forward or backward, the protective sheet is gradually wound up by the winding means. When the chuck table is moved backward or forward, the protective sheet is gradually wound off from the winding means.

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 trencher with a rock saw wheel has a foldable section that may be pivoted to one side during transport of the trencher on a truck or trailer, in order to decrease the overall height of the trencher during transport, or can be removed to reduce transport weight.

Abstract: An adhesive sheet for noise and shock absorption and a saw blade making use of it and manufacturing methods therefor for use in joining components of a cutting or grinding apparatus to generate vibrations and noises such as a cutting saw machine for a grinding or cutting material such as brick, concrete, granite, marble, etc. The adhesive sheet according to the present invention is composed of a resin adhesive such as denaturalized epoxy resin, phenol resin, rubber, or compound composition thereof etc., and a noise and shock absorption material infiltrated with the resin adhesive, and fabricated by infiltrating the noise and shock absorption material such as non-woven fabric, paper, or textiles with the resin adhesive such as denaturalized epoxy resin, phenol resin, rubber, or compound composition thereof etc., and drying the infiltrated noise and shock absorption material at a predetermined temperature for several minutes and hardening it by half.