Method and device for edge-machining of a plastic optical lens and a combination tool therefor
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United States of America Patent
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Dec 18, 2007
Grant Date -
Sep 16, 2004
app pub date -
Nov 25, 2003
filing date -
Nov 25, 2002
priority date (Note) -
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Abstract
An edge-machining device in particular plastic spectacle lenses (L) has two aligned holding shafts (14, 16) rotatable with a controlled angle of rotation (.phi..sub.B) about a rotational axis of a workpiece (B) between which the lens may be clamped and a tool spindle (12) rotationally drives a combination tool (10) about a rotational axis of a tool (C) running parallel to the rotational axis of the workpiece. The holding shafts and the tool spindle may be moved with position control towards each other in a first axial direction (X) and optionally parallel to each other in a second axial directions (Z) perpendicular to the first axial direction. The combination tool can be swivelled with a controlled angle of rotation (.phi..sub.C) about the rotational axis of the tool by means of the tool spindle so that a lathe tool (36) provided on the combination tool may be brought into a defined lathe machining engagement with the edge of the lens. The invention also comprises a combined milling and lathe tool and a combined milling and turning machining method.
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