Apparatus for surface finishing workpieces and chucking device of an apparatus of this kind

An apparatus for surface finishing workpieces by moving the workpieces relative to grinding and/or polishing granules or for drag finishing and/or plunge finishing the workpieces, the apparatus comprising:

• at least one workpiece holder;
• a container disposed below said workpiece holder, said container structured to receive the grinding and/or polishing granules for movement of the grinding and/or polishing granules relative to said workpiece holder;
• and
• at least one chucking device cooperating with said workpiece holder for releasably fixing the workpieces to be machined, said chucking device having a chuck, an adaptor piece and a supporting part connected to said workpiece holder, wherein said chuck is structured for at least partial positive holding of the workpiece for conjoint rotation, said chucking device defining at least one vacuum duct structured for connection to a vacuum generator, said duct having an opening into said chuck to hold the workpiece and to axially fix the workpiece by application of a vacuum to said vacuum duct, wherein said chuck is mounted on said adapter piece and said adaptor piece is fixed to said supporting part in a releasable manner.

A chucking device for releasably fixing workpieces to be machined in an apparatus for surface finishing workpieces by moving the workpieces relative to grinding and/or polishing granules disposed in a bed thereof or for drag finishing and/or plunge finishing the workpieces, the apparatus having at least one workpiece holder for releasably securing the chucking device and a container arranged beneath the workpiece holder to receive the grinding and/or polishing granules, the chucking device comprising:

• a supporting part;
• an adaptor piece releasably mounted to said supporting part;
• and
• a chuck mounted to said adaptor piece, said chuck structured for at least partial positive holding of the workpiece for conjoint rotation, wherein the chucking device defines at least one vacuum duct structured for connection to a vacuum generator, said vacuum duct opening into said chuck to hold the workpiece and to fix the workpiece axially by application of a vacuum to said vacuum duct.