Patent ID: 6062947
Filing Date: 2000-05-16
Classification: B24B

Abstract:
A lens grinding apparatus for grinding the periphery of an eyeglass lens, comprising: data inputting means for inputting shape data of an eyeglass frame and layout data of an eyeglass lens to the eyeglass frame;edge position measuring means for measuring first edge positions of front and rear surfaces of the eyeglass lens on the basis of the input data;inclination angle storing means for storing an inclination angle of a processing surface of a finishing grinding wheel;edge position calculating means for obtaining positions of edge corners on the front and rear surfaces of the eyeglass lens after a finishing process on the basis of the first edge position and the inclination angle of the finishing grinding wheel;chamfering path calculating means for obtaining chamfering paths for the front and rear surfaces of the eyeglass lens based on the thus obtained positions of the edge corners;a rotatable chamfering abrasive wheel having a chamfering surface for the front surface of the lens and a chamfering surface for the rear surface of the lens; andchamfering controlling means for relatively moving the chamfering abrasive wheel with respect to a lens holding shaft based on the thus obtained chamfering paths to chamfer the edge corners of the front and rear surfaces of the finished lens.