Patent ID: 6478657
Filing Date: 2002-11-12
Classification: B24B

Abstract:
An eyeglass lens processing apparatus for processing a periphery of an eyeglass lens, comprising:lens rotating means for holding and rotating the lens; a chamfering abrasive wheel rotating shaft axially supporting at least one chamfering abrasive wheel and a grooving abrasive wheel coaxially and having a rotational axis different from an axis about which a rough abrasive wheel and a finish abrasive wheel are rotatable, the chamfering abrasive wheel rotating shaft being inclined relative to a rotational axis of the lens rotating means so that the grooving abrasive wheel extends along a curvature of an optical plane of the lens; moving means for moving the chamfering abrasive wheel between a retreated position and a processing position; detecting means for obtaining position data of an edge of the periphery of the lens based on target lens shape data of an eyeglass frame or a template and layout data of the lens with respect to a target lens shape; arithmetic means for obtaining position data of a contact point between the lens and the chamfering abrasive wheel with respect to a rotational angle of the lens based on the periphery edge position data thus obtained and configuration data of a processing surface of the chamfering abrasive wheel; and control means for controlling operation of the lens rotating means based on the position data of the contact point thus obtained.