A microchannel electrophoresis-assisted micro-ultrasonic machining apparatus based on a 3D printing mold includes a working platform, a power supply, a 3D printing mold, a working solution tank and an ultrasonic vibration system. The working platform is configured to secure the apparatus. The working solution tank is provided with electrophoresis-assisted electrodes. The ultrasonic vibration system is secured to the lower end of the transfer module. The positive electrode of the electrophoretic DC power supply is electrically connected to the tool and the negative electrode is electrically connected to the electrophoresis-assisted electrodes. A workpiece to be processed is assembled with a 3D printing mold. After assembly, the workpiece and the 3D printing mold are placed in the middle of the electrophoresis-assisted electrodes inside the working solution tank and arranged to correspond to the tool.

A method for smoothing and polishing metals via ion transport by free solid bodies comprises connecting a part to be treated to a positive pole (anode) of a current generator and subjecting the part to friction with a set of particles comprising electrically conductive free solid bodies charged with negative electrical charge in a gaseous environment.

Apparatus 10 and method for cleaning, rejuvenating or treating the internal surfaces of a timber barrel 28 with an abrasive, the apparatus 10 comprising a clamping arrangement that includes at least one clamp 21-24 for clamping the barrel 28. The clamp 21-24 being rotatable to rotate the barrel 28 about its axis and the clamping arrangement being operable to tilt the axis of the barrel 28 during rotation through at least about 20°, preferably 25-40%, to either side of horizontal.

Disclosed herein is a plasma-resistant chamber component and a method for manufacturing the same. A plasma-resistant chamber component of a semiconductor processing chamber that generates a plasma environment includes a ceramic article having multiple polished apertures. A roughness of the multiple polished apertures is less than 32 .Math.in.

A method for smoothing and polishing metals via ion transport by free solid bodies. The method includes connecting a part to be treated to a pole of a current generator and subjecting the part to friction with a set of particles that includes electrically charged and electrically conductive free solid bodies in a gaseous environment.

A rotor polishing device, including a housing with a space therein for holding rotors in need of polishing, an inlet for pumping a polishing lapper into the housing, and a rotational assembly for rotating the rotors during the polishing process. The rotor polishing device is useful for polishing rotors commonly used by rotary screw compression systems.

Disclosed herein is a plasma-resistant chamber component and a method for manufacturing the same. A plasma-resistant chamber component of a semiconductor processing chamber that generates a plasma environment includes a ceramic article having multiple polished apertures. A roughness of the multiple polished apertures is less than 32 μin.

An insert apparatus for protecting a curved inner surface within a passageway from abrasion during an abrasive machining operation is disclosed. In various embodiments, the insert apparatus includes a shield having a shell shaped to match a curved portion of the curved inner surface of the passageway and a shaft having a first end connected to the shell and a second end connected to a member configured to maintain the shaft within the passageway and the shell positioned against the curved inner surface during the abrasive machining operation.

This document discloses a system and method for polishing a metal surface, using a grinding machine and a burnishing machine. The grinding machine comprises an arm coupled with a grinding wheel for grinding the internal surface of a workpiece, an arm rotation drive block configured to drive rotation of the arm around its longitudinal axis, an arm movement drive block configured to move the arm longitudinally and vertically, and rollers for rotating the workpiece around its cylindrical axis via friction with an external surface of the workpiece. The arm comprises a fixed main shaft, a universal joint shaft and a head section coupled with the grinding wheel, wherein the head section is configured to oscillate vertically, allowing the grinding wheel to follow up-and-down fluctuations of the workpiece. The burnishing machine is configured to tumble the workpiece including a tumbling detergent and tumbling beads therein.

In one embodiment, a vibration barrel polishing method using a vibration barrel polishing system that includes a polishing tank having a bottom surface therein and a polishing jig capable of holding a workpiece and rotatable around a rotation axis is provided. This method includes a step of supporting the polishing jig in the polishing tank in a state in which a lowermost portion of the polishing jig is separated from the bottom surface, a clearance d between the lowermost portion of the polishing jig and the bottom surface being greater than or equal to a grain diameter of a polishing medium, a step of causing the polishing medium to flow in the polishing tank, and a step of rotating the polishing jig around the rotation axis in the state in which the lowermost portion of the polishing jig is separated from the bottom surface.