A sintered magnet sawing apparatus is provided comprising a cylindrical work carrier mounted on a horizontal rotating spindle and having a regular polygonal shape in a perpendicular cross section, and a plurality of endless elastic belts adapted to force a work of sintered magnet against the carrier surface to secure the work thereto and adapted to travel synchronously with and counter to the rotation of the carrier in a circulatory manner. In accordance with rotation of the carrier, the work is delivered to the peripheral surface of the carrier, secured thereto by the elastic belts, moved further forward and cutoff machined by an outer cutoff blade. The divided work is moved further forward, released and discharged from the carrier.

A sintered magnet sawing apparatus is provided comprising a cylindrical work carrier mounted on a horizontal rotating spindle and having a regular polygonal shape in a perpendicular cross section, and a plurality of endless elastic belts adapted to force a work of sintered magnet against the carrier surface to secure the work thereto and adapted to travel synchronously with and counter to the rotation of the carrier in a circulatory manner. In accordance with rotation of the carrier, the work is delivered to the peripheral surface of the carrier, secured thereto by the elastic belts, moved further forward and cutoff machined by an outer cutoff blade. The divided work is moved further forward, released and discharged from the carrier.

A workpiece grinding method includes a groove formation step, a groove removal step, and a full surface grinding step. In the groove formation step, the workpiece is ground by performing grinding feed of a grinding unit while rotating a spindle without rotation of a chuck table, so that an arcuate groove is formed with a depth not reaching a finish thickness on a side of a back surface of the workpiece. In the groove removal step, rotation of the chuck table is started with the spindle kept rotating, so that the groove is ground at side walls thereof and is removed from the workpiece. In the full surface grinding step, grinding feed of the grinding unit is performed while the spindle and chuck table are rotated, so that the workpiece is ground in an entirety thereof on the side of the back surface until the workpiece has the finish thickness.

A workpiece grinding method includes a groove formation step, a groove removal step, and a full surface grinding step. In the groove formation step, the workpiece is ground by performing grinding feed of a grinding unit while rotating a spindle without rotation of a chuck table, so that an arcuate groove is formed with a depth not reaching a finish thickness on a side of a back surface of the workpiece. In the groove removal step, rotation of the chuck table is started with the spindle kept rotating, so that the groove is ground at side walls thereof and is removed from the workpiece. In the full surface grinding step, grinding feed of the grinding unit is performed while the spindle and chuck table are rotated, so that the workpiece is ground in an entirety thereof on the side of the back surface until the workpiece has the finish thickness.

A multi-functional wheel deburring device is capable of removing burrs at the center hole, the flange weight reducing socket, the spoke back cavity weight reducing socket and the spoke edge of the wheel during the use.

A multi-functional wheel deburring device is capable of removing burrs at the center hole, the flange weight reducing socket, the spoke back cavity weight reducing socket and the spoke edge of the wheel during the use.

Multiphase Cutting may comprise a bulk removal pass followed by a fine removal pass to cut a gemstone. For example, multiphase cutting may perform a removal by removing approximately 90% of material during a first pass and then reset and remove the remaining 10% of material during a second pass. The second pass may use a slower feed rate and a wider oscillation, moving the gemstone across an entire range of a lap wheel. This split setup may thus produce significantly more accurate results for the accuracy of the total removal.

Multiphase Cutting may comprise a bulk removal pass followed by a fine removal pass to cut a gemstone. For example, multiphase cutting may perform a removal by removing approximately 90% of material during a first pass and then reset and remove the remaining 10% of material during a second pass. The second pass may use a slower feed rate and a wider oscillation, moving the gemstone across an entire range of a lap wheel. This split setup may thus produce significantly more accurate results for the accuracy of the total removal.

An apparatus, system, and method using an elastic biasing element in combination with an encoder arrangement for precise control of force or torque applied to a moving object, is applied for controlling a feed force applied to an abrasive element of a bore finishing tool, to respond to changes in the feed force such as can arise from contact with a workpiece bore surface and variations therein, such as tapers, hourglass shapes, barrel shapes, and the like. The elastic biasing element can include a single or multiple springs in one or more sets, and the feed force can be selected to have a constant value or vary as a function of time, position, or other variables or conditions.

An apparatus, system, and method using an elastic biasing element in combination with an encoder arrangement for precise control of force or torque applied to a moving object, is applied for controlling a feed force applied to an abrasive element of a bore finishing tool, to respond to changes in the feed force such as can arise from contact with a workpiece bore surface and variations therein, such as tapers, hourglass shapes, barrel shapes, and the like. The elastic biasing element can include a single or multiple springs in one or more sets, and the feed force can be selected to have a constant value or vary as a function of time, position, or other variables or conditions.