Abstract: 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.

Abstract: A barrel polishing apparatus has a barrel tank. The barrel tank includes a cylindrical fixed tank having a center axis and a rotary disk provided to cover a bottom portion of the fixed tank and rotatable about the center axis. The barrel polishing apparatus further includes a tilting mechanism. The tilting mechanism has a tilting shaft extending in a horizontal direction to tilt the barrel tank around the tilting shaft. The tilting shaft is disposed closer to the upper edge of the fixed tank than a centroidal line extending parallel to the tilting shaft and passing through the center of gravity of the barrel tank when viewed from a direction parallel to an extending direction of the tilting shaft.

Abstract: 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.

Abstract: A workpiece holding jig is a vibratory barreling jig which holds a flat workpiece when the workpiece is polished by a vibratory barreling device using polishing media. The workpiece holding jig includes disk-shaped guard members and each having an outer shape larger than the workpiece and disposed so as to face each other and a holding member holding the workpiece inside a housing space so that the entire workpiece is located inside the columnar housing space. The guard members and are respectively provided with window portions communicating with the housing space. The window portions and the annular imaginary curved surface extending to connect the peripheral edges of the guard members are configured to allow the polishing media to pass between the inside and outside of the housing space.

Abstract: The purpose of the present invention is to provide a device for brush-polishing by means of a polishing brush that rotates and revolves as in a planetary motion, wherein the conditions to polish can be easily set in accordance with the properties of the workpiece and the purposes to polish. A brush unit has a polishing brush that rotates and revolves. The brush unit includes a mechanism for driving the rotation that rotates the polishing brush and the mechanism for driving the revolution that revolves it. By adjusting the speed of the rotation by the mechanism for driving the rotation the capabilities to polish the workpiece are enhanced. By adjusting the speed of the revolution by the mechanism for driving the revolution the entire workpiece is uniformly polished.

Abstract: A workpiece holding jig is a vibratory barreling jig which holds a flat workpiece when the workpiece is polished by a vibratory barreling device using polishing media. The workpiece holding jig includes disk-shaped guard members and each having an outer shape larger than the workpiece and disposed so as to face each other and a holding member holding the workpiece inside a housing space so that the entire workpiece is located inside the columnar housing space. The guard members and are respectively provided with window portions communicating with the housing space. The window portions and the annular imaginary curved surface extending to connect the peripheral edges of the guard members are configured to allow the polishing media to pass between the inside and outside of the housing space.

Abstract: The purpose of the present invention is to provide a device for brush-polishing by means of a polishing brush that rotates and revolves as in a planetary motion, wherein the conditions to polish can be easily set in accordance with the properties of the workpiece and the purposes to polish. A brush unit has a polishing brush that rotates and revolves. The brush unit includes a mechanism for driving the rotation that rotates the polishing brush and the mechanism for driving the revolution that revolves it. By adjusting the speed of the rotation by the mechanism for driving the rotation the capabilities to polish the workpiece are enhanced. By adjusting the speed of the revolution by the mechanism for driving the revolution the entire workpiece is uniformly polished.