摘要:
An uncut lens judging apparatus for a lens grinding machine of the present invention has frame configuration input means for inputting a vector radius information of the configuration of a lens frame of a spectacle, judging means for judging whether an uncut lens is large enough to be cut into the lens frame configuration, and display means for displaying, when the judgement is negative, at least an angular direction of the vector radius which is judged to be not large enough. Another judging apparatus has correcting means capable of automatically correcting a cutting origin when the uncut lens is not large enough to be cut into a lens frame configuration, so that the uncut lens can be cut into the lens frame configuration. Furthermore, the judging apparatus has means for finding a cutting locus of an uncut lens corresponding to the lens frame configuration which has been input, judging means for judging whether the cutting loc isusy included in clamping range of the uncut lens by a lens clamping member, and alarm means for generating an alarm signal when the judging means judged as "included".
摘要:
A lens grinding apparatus having: a carriage including lens rotating shafts for clamping and rotating a lens to be ground, and a grinding wheel for grinding said lens, said grinding apparatus being characterized in that the box of said carriage accommodates lens-configuration measuring means constituted by, at least one of feelers which can be brought into contact with said lens, and detecting means for detecting the magnitude of travel of said feelers.
摘要:
Disclosure is given for a lens grinding apparatus, comprising a pair of lens shafts (5, 5') mounted on a carriage (4), a coarse grinding wheel (1) whith at least two kinds of V-edge grinders (2, 3) and an edge thickness measuring system (10) adapted to measure the edge thickness of the lens (L) held between the lens shafts (5, 5'). The measurements of the edge thickness of the lens (L), the selection of the medium V-edge grinder (2) or the small V-edge grinder (3) and the subjection of the lens (L) to the V-edge treatment can be automatically performed. Therefore, much time and labor can be saved for the operator to lean the machining art and to select one of the suitable grinders or the like.
摘要:
A method for calculating relationship between pre-edged lens and spectacle frame for use in lens edging machine comprising: frame measurement step to digitally measure radius vector value (p n , θ o ) of the spectacle frame. lens measurement step to digitally measure a configuration of the pre-edged lens held by lens rotation shafts before edging the lens, and comparison step to compare the radius vector value (p n , θ n ) with the measurement value of the configuration of the pre-edged lens so as to judge whether or not the pre-edged lens can be edged for fitting to the frame, and device for the method.
摘要:
In a lens grinding apparatus in which a lens held by a lens shaft of a swingable carriage body is ground by a V-edging grinder, the lens grinding apparatus of this invention is characterized in that a resilient member, the resilient force of which is adjustable by abutting force adjusting means, is interposed between the rear end portion of the carriage body and a carriage base, a swing down moment of the carriage is calculated with reference to the swing angle of the carriage when a roughly ground lens held between the lens shafts is abutted against the V-edging grinder and the abutting force adjusting means is drive controlled as such that a difference between the pivot down moment and the pivot down preventing moment by the spring becomes constant.