Presented is a method, apparatus, and computer-readable medium for deburring. An apparatus includes a body, a first abrasive surface coupled to the body, and a second surface coupled to the body, the second surface positioned relative to the first abrasive surface, wherein the second surface is positioned between 1 and 90 relative to the first abrasive surface. The apparatus further includes a third abrasive surface coupled to the body, the third abrasive surface positioned perpendicular to the first abrasive surface and the second surface along a terminal edge of the first abrasive surface and a terminal edge of the second surface.

Described is a method for grinding workpieces, which comprise at least one cylindrical and profiled portion each, on one and the same grinding machine. The workpiece is ground initially in a first grinding operation in a first clamping in the grinding machine, said first grinding operation being followed by a second grinding operation once the first clamping has been released and then, before the start of the second grinding operation, a second clamping has been generated.

Described is a method for grinding workpieces, which comprise at least one cylindrical and profiled portion each, on one and the same grinding machine. The workpiece is ground initially in a first grinding operation in a first clamping in the grinding machine, said first grinding operation being followed by a second grinding operation once the first clamping has been released and then, before the start of the second grinding operation, a second clamping has been generated.

A grinding apparatus includes grinding wheel side vibrational displacement calculation devices that obtain a vibrational displacement of a grinding wheel resulting from a vibration in an approaching/separating direction of the grinding wheel; main spindle side vibrational displacement calculation devices that obtain a vibrational displacement of a workpiece generated by propagation of the vibration in the approaching/separating direction of the grinding wheel; a relative vibrational displacement calculation unit that obtains a relative vibrational displacement between the grinding wheel and the workpiece based on the vibrational displacement of the grinding wheel and the vibrational displacement of the workpiece that have been obtained; a position change unit that creates, based on the obtained relative vibrational displacement between the grinding wheel and the workpiece, a position change command to change a position of the wheel spindle stock; and a processing controller that grinds the workpiece W based on the created position change command.

A shaft member for a fluid bearing device includes, on an outer peripheral surface thereof, two bearing surfaces (31 and 32) separated from each other in an axial direction, and a middle relief portion (33) formed between the bearing surfaces (31 and 32) and having a diameter smaller than a diameter of the bearing surfaces. The middle relief portion (33) includes a cylindrical surface portion (331) having a ground surface, and stepped portions (332) arranged on both axial sides of the cylindrical surface portion and having a diameter difference from the cylindrical surface portion.

The disclosure relates to a hardbanding removal apparatus and method for use with oilfield tubulars and downhole tools. The apparatus includes a tiltable frame with support arm, a grinding wheel coupled to the support arm, and an idler wheel assembly to supply mechanical feedback to the grinding wheel through the support arm. The mechanical feedback allows the grinding wheel to remove hardbanding accurately and uniformly on tubulars that are eccentric, curved, or have eccentric hardbanding. The tiltable frame enables grinding of tapered sections of the tubular without reorienting the tubular. The method includes removing hardbanding using the apparatus.

The disclosure relates to a hardbanding removal apparatus and method for use with oilfield tubulars and downhole tools. The apparatus includes a tiltable frame with support arm, a grinding wheel coupled to the support arm, and an idler wheel assembly to supply mechanical feedback to the grinding wheel through the support arm. The mechanical feedback allows the grinding wheel to remove hardbanding accurately and uniformly on tubulars that are eccentric, curved, or have eccentric hardbanding. The tiltable frame enables grinding of tapered sections of the tubular without reorienting the tubular. The method includes removing hardbanding using the apparatus.

To solve the problems of conventional wire billet butt-welding such as high labor intensity, potential safety hazards, and low production efficiency, the disclosure provides a wire billet butt-welding apparatus and a wire billet butt-welding method. The wire billet butt-welding method comprises: S1: preparing a stock, S2: rotating a butt-welding stock receiver to a stock receiving position, and feeding a first coil of wire billet to a stock receiving rod of the butt-welding stock receiver; S3: welding the first coil of wire billet and the second coil of wire billet on a rotary plate at the butt-welding position end-to-head; S4: rotating the butt-welding stock receiver and the second coil of wire billet to the stock receiving position; S5: rotating the stock receiving rod to rotate to tighten the wire billet between the first coil of wire billet and the second coil of wire billet; and S6: repeating steps S3 to S5 to complete butt-welding operations on the 3.sup.rd to n.sup.th coils of wire billet sequentially. The solution implements semi-automated butt-welding operation; with provision of the rotary plate and the butt-welding stock receiver, enables automatic loading, automatic flipping, and automatic discharging, which reduces the manual workload, lowers the safety hazards, and improves the production efficiency.

A device for machining a surface of a workpiece includes a workpiece holder configured to rotate the workpiece about a workpiece rotational axis, a tool having a tool rotational axis and at least one blade having a blade radius of curvature and a tool holder configured to position the tool such that an active point of the blade comes into engagement with the workpiece and configured to pivot the tool about the tool rotational axis and to configured to move the tool with an advancing motion such that the active point of the blade shifts along the blade. The advancing motion is defined by a curve having at least a first radius of curvature and a second radius of curvature.

The invention relates to a tool for cleaning rollers (2a, 2b) of machines for closing container or cans, which comprises a head (1) which is couplable to a motor and on which are mounted: rotary drive discs (14) of the rollers (2a, 2b) to be cleaned and which comprise at least one element for making contact with the rollers, to transmit traction to same; at least one actuator disc (15, 16) that has a different rotation direction and/or rotation speed to the drive discs (14), and which is provided with at least one element for cleaning the rollers (2a, 2b); and a transmission (50) disposed between the motor and the discs (14, 15, 16).