An abrasive article can include a substrate, abrasive particles coupled by a bond material to the substrate, and a coating overlying at least partially the exterior surface of the bond material. The coating can be a poly(p-xylylene) polymer applied via vapor deposition and may provide enhanced strength to the bond material and extended life time to the abrasive article.

A machining apparatus for a curved plate includes a holder that holds a main surface of a curved plate having curved surfaces on both main surfaces; a machining device that machines an outer circumference of the curved plate held by the holder; a movable frame that retains the machining device; a driver that moves the movable frame to move a machining point of the curved plate held by the holder; a controller that controls the driver; and a guide that guides the movable frame along the outer circumference of the curved plate held by the holder.

A grinding element has an abrasive surface and an abutment surface which is offset by an offset from the abrasive surface. A grinding depth can be adjusted by changing the offset. The grinding element may be a grinding belt.

A device for covering a tooth profile during machined processing with a tool, including an appliance for applying cooling lubricant to at least one contact area between the tool and the tooth profile during machine processing of the tooth profile by means of the tool. The appliance includes a guiding means by means of which a front face of the tooth profile in an area that is facing towards the contact area and an environment of the tooth profile in front of the area can be at least partially covered. The appliance is formed with at least one conduit which, in the operational state of the guiding means in which the tooth profile is covered, is arranged so as to extend in front of the tooth profile in the area that is shielded by the guiding means, and via which cooling lubricant can be supplied to the contact area through the guiding means.

A method of forming a workpiece having machinability rating not greater than a machinability rating of Inconel 718. The method may include removing material from the workpiece by moving at least one grinding tool relative to the workpiece and may be conducted at a specific grinding energy of not greater than about 7 Hp/in.sup.3 min (about 19 J/mm.sup.3) for a material removal rate of at least about 2.5 in.sup.3/min.Math.in (about 25 mm.sup.3sec/mm).

Methods for manufacturing a diffuser plate for a PECVD chamber are provided. The methods provide for applying a compliant abrasive medium to round the sharp edges at corners of the output holes on a contoured downstream side of a gas diffuser plate. By rounding the edges of the output holes reduces the flaking of deposited materials on the downstream side of the gas diffuser plate and reduces the amount of undesirable particles generated during the PECVD deposition process.

This method for manufacturing a ring is a method for manufacturing an endless metal ring for a continuously variable transmission using a transmission belt that is formed by binding a plurality of elements with the ring. The method includes: a welding step of butt welding ends of a metal strip to form an endless tubular body; a solution treatment step of solution-treating the welded tubular body; a cutting step of cutting the solution-treated tubular body with laser light into ring bodies with a predetermined width; a lateral end processing step of pressing a grinding wheel against a lateral end of the cut ring body to remove a heat-affected zone formed by the cutting step and form the lateral end into a convex arc shape; and a rolling step of adjusting the ring body with the processed lateral end to a predetermined thickness.

A manufacturing apparatus for producing a curved contour on an end face of a roll includes a grinding device and a holding device, linearly movable relative to the grinding device. The grinding device is for grinding the curved contour on the end face. The holding device is for holding the roll between the holding device and the grinding device. A method for producing the curved contour on the end face using the manufacturing apparatus is also disclosed. The method includes driving the holding device to move in a linear fashion relative to the grinding device.

A grinding machine for finishing turned surfaces of a rotor disc for a gas turbine engine, including a retaining mechanism for retaining the rotor disc and rotatable about a rotational axis corresponding to a central axis of the rotor disc, a spindle engaged to a grinding wheel and rotatable about a rotational axis corresponding to a central axis of the grinding wheel, the grinding wheel having an outer super abrasive surface, a translating mechanism engaged to at least one of the retaining mechanism and the spindle and actuable to provide a relative translational motion between the retaining mechanism and the spindle along three perpendicular axes, and a pivoting mechanism engaged to one of the retaining mechanism and the spindle and actuable to provide a pivoting motion of the rotational axis of one of the retaining mechanism and the spindle around a pivot axis perpendicular thereto.

The present disclosure provides a method of detecting and preventing grind burn from developing on a gear. The method includes performing acoustic emission testing while the gear is being ground during a grinding operation. The grinding wheel is evaluated during an eddy current test to detect material buildup on the grinding wheel which could cause grind burn. In addition, the method includes collecting swarf from the gear during the grinding operation and inspecting the swarf for an indication of grind burn.