Process and device for the surface processing of workpieces made of non-brittle hard materials in optics production and tool therefor

摘要

There is a device for surface processing of u. a. Plastic eyeglass lenses (L), which has a workpiece spindle (10), by means of which the spectacle lens can be driven in a rotationally controlled manner about a workpiece axis of rotation (B), and has a tool spindle (12), by means of which a tool (18) surrounds a tool -The axis of rotation (C) can be driven in a rotating manner, the workpiece and tool spindle being positionally movable in two perpendicular axial directions (X, Y) relative to one another. According to the invention, for turning the surface (F) of the spectacle lens to be machined, the tool can also be pivoted about the tool axis of rotation (C) by means of the tool spindle, so that a rotary cutting edge provided on the tool is dependent on the rotational angle position of the spectacle lens with the surface to be machined the spectacle lens can be brought into a defined lathe machining operation. The invention also includes a combined milling and turning tool as well as a combined milling and turning method. As a result, high metal removal rates and very good surface qualities can be achieved in a simple and efficient manner in surface processing.