Abstract:
An abrasive article includes a body having an annular surface including abrasive segments coupled to the annular surface, and the abrasive segments define an abrasive annular region and a percent abrasive surface area of not greater than 24% for the total surface area of the abrasive annular region.
Abstract:
A tool (10) for removing fusion bonded epoxy coating from the surface of a pipe has an elongate rotatable shaft (12) suitable for being received in a rotating tool holder of a machine. Extending radially outward of the distal end (16) of the shaft (12) are a plurality of fingers (40), the outer ends of which are spaced apart. Each of the fingers (40) is made of a spring metal, and at the distal end of each finger is an abrasive pad (60) having diamond particles embedded in soft metal. Spring force is independently applied by each spring finger (40) to its associated abrasive pad (60).
Abstract:
A cup wheel for a grinding tool for use in grinding semiconductor substrates is presented herein, the wheel comprising: a hub having a pair of opposing faces and a peripheral rim linking said faces; and at least one grinding segment mounted on and upstanding from at least one face of the hub; wherein in use, as the wheel is rotated, the face ofthe hub on which the at least one grinding segment is mounted is directed towards the substrate to be ground, to bring the at least one grinding segment into contact withthe substrate, and wherein at least one pair of side faces of the at least one grinding segment intersect at a leading edge which substantially faces the direction of travel of the grinding segment as the wheel rotates.
Abstract:
Ein Schleifwerkzeug enthält einen Tragkörper (2) und einen im Umfangsbereich angeordneten Schleifbelag (28) mit Lamellen (30), zwischen welchen Spalte (32) vorhanden sind, wobei zum Schleifen Kühlmittel zuführbar ist. Das Schleifwerkzeug soll mit einem geringen Aufwand dahingehend weitergebildet werden, dass eine sichere Befestigung und Fixierung der Lamellen (30) bezüglich des Tragkörpers (2) erreicht wird und die Standzeit sowie die Schleifeigenschaften verbessert werden. Zur Lösung wird vorgeschlagen, dass das Schleifwerkzeug als Schleifschnecke ausgebildet ist und die Lamellen (30) ein Außenprofil mit Zähnen (26) aufweisen, dass der Tragkörper (2) Nuten (10) aufweist, in welchen die Lamellen (30) teilweise eingesetzt sind, wobei die Lamellen (30) um einen vorgegebenen Betrag aus den Nuten (10) und dem Tragkörper (2) hervorstehen, und dass die Lamellen (30) eine poröse Struktur derart aufweisen, dass das Kühlmittel durch die Lamellen (30) strömen kann.
Abstract:
The present invention is for a grinding device (10), such as a surface grinding disc or an annular grinding wheel (100), constructed from a plurality of abrasive segments (30) arranged in an array thereon (26) (26'), wherein the plurality of abrasive segments are embedded in a matrix composition (40), and wherein the device is abapted to perform a "dry machining" operation. The abrasive segments may be resin bonded or vitrified and may include diamond or other superhard or superabrasive particles, such as, for example, cubic boron nitride ("cBN"), dispersed therein. Both the abrasive segments (30) and the matrix composition (40) include a dry lubricant, such as hexagonal boron nitride, molybdenum disulfide or graphite, dispersed therein. The abrasive segments (30) further include a melt phase metal composition, such as bronze or other copper alloys, to aid in heat dissipation.
Abstract:
The present invention is for a grinding device (10), such as a surface grinding disc or an annular grinding wheel (100), constructed from a plurality of abrasive segments (30) arranged in an array thereon (26) (26’), wherein the plurality of abrasive segments are embedded in a matrix composition (40), and wherein the device is abapted to perform a "dry machining" operation. The abrasive segments may be resin bonded or vitrified and may include diamond or other superhard or superabrasive particles, such as, for example, cubic boron nitride ("cBN"), dispersed therein. Both the abrasive segments (30) and the matrix composition (40) include a dry lubricant, such as hexagonal boron nitride, molybdenum disulfide or graphite, dispersed therein. The abrasive segments (30) further include a melt phase metal composition, such as bronze or other copper alloys, to aid in heat dissipation.
Abstract:
A grinding stone pellet (1) comprises a cylindrical base (2) fixed on a stand tray (9), and a grinding particle section (5) formed on the end surface (3) of the base (2) by electroless deposition and having a large number of grinding particles. In forming the grinding particle section (5), the distribution of grinding particles in the grinding particle section (5) can be uniformized by forming a plating layer on the end surface (3) of the base (2) while stirring a plating liquid containing grinding particles.
Abstract:
The invention concerns a method for making a tool comprising at least a machining tip (1) consisting of one or several materials, in particular diamond-based, and a support (3) for the tip(s), the method comprising for the tip or each tip, the shaping of a cavity (2) in the support, according to the desired shape for the tip, setting the support such that the cavity has an opening (4) upwards, filling the cavity with the material(s) (6) constituting said tip, setting a mass (7) of a bonding metal alloy on the material(s) constituting the filling, the alloy being selected to have at least a melting temperature less than that of the support and of the constituting materials, raising the temperature of the whole assembly thus formed, until the bonding alloy melts, so as to allow the alloy to melt and naturally infiltrate so that it fills all the interstices between the constituting materials and between the latter and the wall of the cavity, and cooling the whole infiltrated assembly.
Abstract:
Working plate (10) is formed of forty-eight sections (10'), with groove (12) extending through the majority of the thickness of the plate. In one form, dovetail grooves are machined to the back of the sections of the plates (10') attached to the base plate (19). In an alternative arrangement, fixing rails are attached to the backs of the sections and the dovetail grooves are in the base plate (19).
Abstract:
A pad shaping tool (10) for shaping a polishing pad (36). The tool includes a disk (12) having a first side (14) and a second side (16) and at least two discontinuous pad shaping surfaces (18) located in spaced apart positions relative to each other on the first side (14) of the disk (12). A process for reconditioning the polishing pad (36) on a rotatable platform of a wafer polishing machine includes the steps of engaging the pad shaping tool (10) with the polishing surface (44) of the pad (36) such that at least two discontinuous pad shaping surfaces (18) of the tool simultaneously engage the polishing surface (44), and rotating the polishing pad (36) while preventing translational movement of the tool (10) relative to the pad so that the tool (10) shapes the polishing surface (44), changing its cross sectional profile from a curved shape to a flatter shape.