Abstract: Provided is a grindstone tool capable of grinding with high precision and a method for manufacturing same, the grindstone tool having improved chip discharge characteristics to thereby prevent chips clogging of the chip pocket. The grinding tool comprises: dimples (14) formed in the external peripheral surface (13a) of a base metal (11) so that the quantity present in any position in the width direction of the external peripheral surface (13a) is the same in the peripheral direction; a grinding surface (21) formed by affixing a plurality of abrasive grains (22) to the external peripheral surface (13a) using a plating layer (23); and recess parts (24) into which chips produced by the grinding of the abrasive grains (22) are discharged, the recess parts being formed by portions that correspond to the dimples (14) in the grinding surface (21) being recessed.

Abstract: Apparatus for sharpening a cutting tool. In some embodiments, a tool sharpener is provided with a flexible abrasive medium having an abrasive surface and arranged along a planar extent. A guide assembly has a guide frame, a cam surface, and a pivotal guide member. A guide surface on the guide member extends at a selected angle with respect to the planar extent of the medium to support a first side of the tool during presentation of a second side and cutting edge of the tool against the abrasive surface along the planar extent. A cam follower contactingly engages the cam surface to establish the selected angle. A biasing mechanism applies a biasing force to urge the guide surface to pivot toward the planar extent to maintain the cam follower in contact with the cam surface.

Abstract: A retreaded tire manufacturing method, which avoids forming the buffed surface always in the same position by buffing in tire retreading and the resulting drop in delamination resistance of new tread rubber, and tires suitably retreaded by this manufacturing method are provided. In this method, the tread rubber of a tire is abraded away circumferentially to form a tread application surface of the tire to which new tread rubber is applied. And the position where the tread application surface is formed is radially changed as the repeat count of retreading rises.

Abstract: A machine tool, for example a hand-held belt grinder, is subjected to high frequencies outside a working plane between an abrasive belt and a workpiece. In particular, the machine tool is subject to high frequencies in a free-running region of the belt, of an excitation actuator, in particular by a piezo element.

Abstract: A quick replacement device of an abrasive belt wheel is disposed on a belt sander. The belt sander has an abrasive belt wheel box. The abrasive belt wheel box is provided with two spaced fixing seats. Two ends of the abrasive belt wheel are provided with brackets relative to the fixing seats. The brackets and the fixing seats are fixed through fixing members. Through the fixing members, the abrasive belt wheel can be assembled to or disassembled from the abrasive belt wheel box quickly, providing a simple and quick replacement effect. The time to replace the abrasive belt wheel can be shortened so as to enhance work efficiency and economic efficiency.

Abstract: A coated abrasive product includes green, unfired abrasive aggregates having a generally spheroidal or toroidal shape, the aggregates formed from a composition comprising abrasive grit particles, a nanoparticle binder, a sulfosuccinate, and a crosslinking, wherein the abrasive aggregates are dispersed within a polymer resin coating comprising a mixture of copolyester resin. The coated abrasive product is capable of finishing coated surfaces and repairing defects in coated surfaces, including surfaces coated with automotive primers, paints, clear coats, and combinations thereof.

Abstract: A polishing head of a chemical mechanical polishing apparatus includes a housing moving up and down, a base assembly connected to a bottom of the housing to support the housing, a membrane on a bottom of the base assembly and a retainer ring surrounding the membrane and connected to the bottom of the base assembly, the membrane including a pressing portion to adsorb and press a substrate, a first partition on the pressing portion and extending from an edge of the pressing portion along a height direction, a first horizontal extending portion extending from an upper end portion of the first partition toward a center of the membrane, and a second horizontal extending portion from the upper end portion of the first partition toward the center of the membrane, the second horizontal extending portion being above the first horizontal extending portion and including a curved portion expanding by pneumatic pressure.

Abstract: A composite abrasive wheel comprises primary and secondary abrasive portions. The primary abrasive portion comprises shaped ceramic abrasive particles retained in a first organic binder. The secondary abrasive portion is bonded to the primary abrasive portion, and comprises secondary crushed abrasive particles retained in a second organic binder. The primary abrasive portion comprises a larger volume percentage of the shaped ceramic abrasive particles than the secondary abrasive portion. A central aperture extends through the composite abrasive wheel.

Abstract: Systems and methods for shaping leads of electronic lapping guides to reduce calibration error are provided. One such system includes a device configured to generate predictable resistance for leads of an electronic lapping guide, the device including a lapping surface, and an ELG configured to provide information indicative of a degree of lapping performed on the lapping surface, the ELG including a first electrical lead, a second electrical lead spaced apart from the first electrical lead, and a resistive element between the first electrical lead and the second electrical lead, the resistive element including a right segment, a left segment, and a middle segment that abuts each of the right segment and the left segment, where the right segment is spaced apart from the left segment and the middle segment is adjacent to the lapping surface, where the first and second electrical leads are recessed from the middle segment.

Abstract: A grinding tool carrier (1) having substantially circular grinding discs (2), on which an abrasive covering is detachably secured, wherein chip-removing cutters (4) are arranged on the grinding tool carrier (1) and between the grinding discs (2).

Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.

Abstract: A horizontal double disc surface grinding machine of through field type wherein a plate work in vertical posture is induced between grinding wheels by V-belts and work guiding plates. A work falling prevention member is disposed in a work transfer area. The work falling prevention member is provided with an upper plate, a middle plate, and a lower plate, and the middle plate is inserted to a gap between V-belt single bodies.

Abstract: The present invention provides an apparatus for removing the unnecessary thin-film layer on the periphery of the substrate of the plate-like member having a square shape, on the surface of which substrate is formed a thin-film layer. The apparatus comprises a chamber to treat the peripheral part where the peripheral part of the plate-like member is inserted and where the unnecessary thin-film layer on the peripheral part of the plate-like member is removed; and a means to move the plate-like member. The chamber to treat the peripheral part comprises a cover to prevent the scattering of the sprayed particles and the dust for treating the peripheral part, the cover having one of its end-sides that forms a ceiling being closed and having the other end-side that is opposed to the ceiling being open and a suctioning cover for treating the peripheral part, having an opening that has the same shape as the opening of the cover to prevent the scattering of the dust.

Abstract: The method is for sharpening a blade. An automatic sharpening apparatus is provided that has a holder. A blade is placed into the holder. A grinding-wheel driving motor, in operative engagement with a wheel on a spindle, rotates a grinding wheel. A grinding assembly motor moves the grinding wheel in an x-direction towards the blade. A linear motor moves the grinding wheel from a first position to a second position in a z-direction without moving the grinding-wheel driving motor. The rotating grinding wheel engages the blade. The grinding wheel sharpens the blade.

Abstract: A pad conditioner may include multiple independently mounted conditioning elements configured to condition a polishing pad used in, e.g., a chemical mechanical polishing (CMP) process. In some embodiments, the pad conditioner may include a main assembly disk and a main assembly base plate attached to the main assembly disk via a gimbal connection. A plurality of pad conditioner assemblies may be attached to the main assembly base plate. In some embodiments, each pad conditioner assembly may include a pad conditioner disk attached to the main assembly base plate, a pad conditioner base attached to the pad conditioner disk via a gimbal connection, and a conditioning element attached to the pad conditioner base. Methods of conditioning a polishing pad are also provided, as are other aspects.

Abstract: The object of the invention is a modular machine for cutting ceramic pieces, comprising two towers (7), a central profile (5) and two lateral profiles (4) fastened to the two towers (7), at least two rigidity providing elements (14) between each lateral profile (4) and the central profile (5), two guides (9) fastened to the towers (7) and a number of guide reinforcements (28) around the guides (9), providing the guide (9) and a tool-bearing assembly (3) with precision, at least two floating platforms (6) supported on the rigidity providing elements (14) which constitute a support for the ceramic piece, a tool-bearing assembly (3) that may be displaced along the guides (9), such that the lateral profiles (4), the central profile (5), the guides (9) and the guide reinforcements (28) are fastened to the towers (7) in a dismountable fashion.

Abstract: Apparatus and method for sharpening a cutting tool, such as but not limited to a kitchen knife. In accordance with some embodiments, a flexible abrasive disk is adapted for rotation about a central axis at a selected rotational velocity. Centrifugal forces imparted to the disk during rotation urge the disk to a neutral position in which an outer peripheral portion of the disk is extended toward a selected plane. A housing adjacent the flexible disk has a guide slot with a guide surface at a selected bevel angle with respect to the selected plane. The guide surface is adapted to facilitate presentation of a cutting tool in contacting engagement against the disk. The cutting tool is presented at the selected bevel angle to induce curvilinear displacement of the flexible disk during sharpening of a cutting edge that extends along a side of the cutting tool.

Abstract: The present disclosure relates to a method for operating a machine tool, in particular a gear cutting machine, with at least two machine tables, with at least one common counter-support and with at least two counter-bracket arms, wherein the clamping forces are controlled and/or regulated at the respective position in dependence on the current process and in dependence on the process forces necessary according to the current process. Furthermore, the present disclosure relates to a machine tool, in particular a gear cutting machine.

Abstract: A stone saw for sawing drilling samples. The stone saw includes a rotation axle provided with an axial flushing channel. On the rotation axle a circular blade is arranged. On at least one side of the circular blade is a blade flange, which includes several spray openings that are connected to the flushing channel of the rotation axle. Flushing fluid may then be sprayed on a sawing site.

Abstract: In a certain embodiment, the invention comprises an apparatus for injecting slurry between the wafer and the pad in chemical mechanical polishing of semiconductor wafers comprising an injector the leading edge of which possess bays, depressions or notches that capture spent slurry and hold it long enough for it to transfer heat from the polishing reaction to the pad or through the injector to the new slurry before the said spent slurry is thrown from the polishing pad. The effect is to considerably improve the removal rate, reduce slurry consumption and reduce operating time.