(57) Apparatus for surface finishing of metal pieces, in particular for satin-polishing
extractor hoods (10) and the like. The apparatus comprises a first work unit (17)
provided with a rotating brush (18) and a second work unit (14) for supporting the
metal piece (10), which can be positioned frontally one in relation to the other.
Both work units (14, 17) are movable along respective slide guides (12, 13; 15, 16)
in planes at right angles one to the other; each work unit (14, 17) is also provided
with three controlled axes (Al, A2, A3; A4, A5, A6), each of which is operatively
connected to a control device designed to send reference signals to a programmable
process unit (CPU) so as to sequentially orientate each surface (S) of the metal piece
(10) along a reference plane, for example parallel to the vertical sliding plane of
the work unit (17) for supporting the rotating brush (18), and respectively to move
the same brush (18) along two orthogonal axes (A2, A5) parallel to the reference plane,
according to a programmed work path (D0-D9).
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