Patent ID: 7308745

Claim:
Method for the edge-machining of an optical lens (L), namely a plastic spectacle lens rotatable with a controlled angle of rotation (φ B ) about a rotational axis of a workpiece (B) with the following steps: preliminary machining of the edge (R) of the lens (L) by means of at least one combination tool ( 10 ) adjustable at least radially relative to the rotational axis of the workpiece (B) and rotatable about a rotational axis of a tool (C) whereby, seen in plan view, the lens (L) is given a circumferential contour (U) that corresponds to a circumferential contour of a holder for the lens (L) apart from a slight degree of oversizing if necessary and finish-machining of the edge (R) of the lens (L) by means of the combination tool ( 10 ) whereby the edge (R) of the lens (L) is provided, when viewed in cross section, with a prespecified edge geometry corresponding to its intended means of fastening to the holder, optionally with a protective chamfer (F 1 , F 2 ) at the transition to one or both optically effective surfaces (O 1 , O 2 ) and optionally polished; characterised in that the preliminary machining of the edge (R) and the finish-machining of the edge (R) is performed by means of a combination tool ( 10 ) comprising both milling cutters ( 26 , 28 , 66 , 68 , 70 , 72 , 74 ) and at least one lathe tool ( 36 ) with said combination tool being rotated at a controlled rotational speed (n c ) about the rotational axis of the tool (C) during a milling machining of the edge (R), and being swivelled with a controlled angle of rotation (φ C ) about the rotational axis of the tool (C) before and optionally also during the lathe machining of the edge (R).