A method for outer surface finishing of a workpiece may include coaxially placing the workpiece inside a vessel. The exemplary vessel may include at least one baffle that may radially extend from an inner wall of the vessel toward the outer surface of the workpiece. The exemplary method may further include pouring an abrasive medium inside the vessel, rotating the abrasive medium about the longitudinal axis in a first direction within the vessel relative to the outer surface of the workpiece by rotating the vessel about the longitudinal axis, and concurrently rotating the workpiece within the vessel about the longitudinal axis in a second direction, the second direction being opposite the first direction.

A method for outer surface finishing of a workpiece may include coaxially placing the workpiece inside a vessel. The exemplary vessel may include at least one baffle that may radially extend from an inner wall of the vessel toward the outer surface of the workpiece. The exemplary method may further include pouring an abrasive medium inside the vessel, rotating the abrasive medium about the longitudinal axis in a first direction within the vessel relative to the outer surface of the workpiece by rotating the vessel about the longitudinal axis, and concurrently rotating the workpiece within the vessel about the longitudinal axis in a second direction, the second direction being opposite the first direction.

The invention related to a slide-grinding body having two sections that come to a point and emanate from a base cross-section, wherein the geometry of the base cross-section (4) has curved flanks, the base cross-section is the largest at the centre and the cross-section becomes linearly or exponentially smaller towards the points of the sections (2).

The invention related to a slide-grinding body having two sections that come to a point and emanate from a base cross-section, wherein the geometry of the base cross-section (4) has curved flanks, the base cross-section is the largest at the centre and the cross-section becomes linearly or exponentially smaller towards the points of the sections (2).

A processing method for an additively manufactured article, the processing method including: accommodating an additively manufactured article containing metal and a medium made of metal in a barrel polishing device; and reducing a roughness of a surface of the additively manufactured article and applying a residual stress to the additively manufactured article by stirring the additively manufactured article and the medium, in which a surface of the medium includes a curved surface.

After three or four abrasive rock tumbling steps with successively finer and finer adhesive, the rocks are tumbled with pieces of an elastomer, for example plastic foam. The plastic foam may be polyurethane foam. The result is a higher polish than could be achieved by prior abrasive and finishing approaches. A polishing compound may be embedded in the polyurethane foam. Advantages of doing this include that the user gets multiple polishings out of the material base, there is less breakage of the rocks during tumbling process, and the tumbling mix will not sludge up if the user were to let the barrel sit after tumbling.

After three or four abrasive rock tumbling steps with successively finer and finer adhesive, the rocks are tumbled with pieces of an elastomer, for example plastic foam. The plastic foam may be polyurethane foam. The result is a higher polish than could be achieved by prior abrasive and finishing approaches. A polishing compound may be embedded in the polyurethane foam. Advantages of doing this include that the user gets multiple polishings out of the material base, there is less breakage of the rocks during tumbling process, and the tumbling mix will not sludge up if the user were to let the barrel sit after tumbling.

An apparatus includes a milling chamber, one or more hoppers arranged to continuously discharge material into the milling chamber, a plurality of grinding balls disposed in the milling chamber, a vibration generating device operable to agitate the grinding balls and thereby mill material received within the milling chamber from the one or more hoppers, and a collection chamber positioned to receive material continuously discharged from the milling chamber.

An apparatus includes a milling chamber, one or more hoppers arranged to continuously discharge material into the milling chamber, a plurality of grinding balls disposed in the milling chamber, a vibration generating device operable to agitate the grinding balls and thereby mill material received within the milling chamber from the one or more hoppers, and a collection chamber positioned to receive material continuously discharged from the milling chamber.