| 摘要 |
Apparatus and method for surface finishing of parts or workpieces by attrition, in the presence of a liquid vehicle, with loose, comminuted, granular, or particulate solid finishing material or media, comprising relatively large finishing particles, i.e., chips, is described. The apparatus comprises a finishing chamber having a containing surface comprising an upstanding wall and a bottom symmetrically arranged about a common axis, being relatively rotatable about said axis, and having apposed closely-spaced surfaces, with a resilient seal having correspondingly apposed elements therebetween, the apposed elements of said seal being in closely-spaced apart or touching relationship and the surface of at least one of said apposed seal elements being irregular. The bottom, e.g., is adapted to rotate about the common axis and thus to impart motion to the contents of the chamber and impell them radially outwardly by centrifugal force, thereby also building up a liquid pressure head along the outer edge areas of the finishing chamber bottom. The spacing and irregularities in the apposed seal elements provide communication between the chamber and the exterior, and said spacing and irregularities are of a size sufficient to permit outflow of liquid vehicle under the said head of liquid pressure, including fine abrasive, metal, or like material ("fines") which may be entrained therein, but insufficient to permit passage of workpieces and finishing chips.
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