摘要:
Ophthalmic abrasive wheel including a plurality of swarf clearing grooves formed across the cutting surface and having closed profiles such that the swarf clearing grooves do not open to or exit the side of the abrasive wheel. The swarf clearing grooves are spaced around the cutting surface of the wheel and are configured so as to be substantially angled either towards or away from one another.
摘要:
A one-piece abrasive sheet and method of manufacture. The abrasive pad has a planar sheet portion with a plurality abrasive protrusion extending therefrom. The protrusions are intimately molded with the planar sheet portion to form a one-piece sheet. Thermoplastic and abrasive grit mixture may be used to form the sheet. The resulting pad has improved durability.Also disclosed is an improved circumferentially outer lip structure with a ramp surface for improving performance of the pad over irregular surfaces or surfaces with edges or steps or the like.
摘要:
A multilayer abrading tool is produced by first providing a tool substrate with an irregular abrading surface. The irregular surface is covered with metal balls which are brazed thereto to form a structured surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool is then heated to drive off the binder and to cause infiltration of the infiltrant in the abrasive grit to form a multilayer of diamond grit suspended in a braze matrix which is attached to the structured surface of the tool substrate.
摘要:
A method for reconditioning diamond abrasive generator wheels having a layer of diamond particles brazed to the grinding surface involves heating the braze, binding the diamond particles above the liquid melting point, reorienting the diamond particles to increase their abrasive effect, then cooling the braze with the reoriented diamond particles until it resolidifies.
摘要:
A multilayer abrading tool is produced by first providing a tool substrate with a structured abrading surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool is then heated to drive off the binder and to cause infiltration of the infiltrant in the abrasive grit to form a multilayer of diamond grit suspended in a braze matrix which is attached to the structured surface of the tool substrate.
摘要:
An apparatus for lapping of ophthalmic lenses has a spherical bearing for supporting a rod, one end of which carries a lapping tool. The spherical bearing has a race and ball through which the rod is fixedly secured. The ball has a generally vertically extending channel facing the race and the race has a guide pin which slidably extends into the channel thus allowing the ball free pivotal but not free rotational movement with respect to the race.
摘要:
The present invention relates to a beveling wheel and method for forming a beveled lens with the beveling wheel for use with eyeglasses. One embodiment includes a prescription lens for use on an eyeglass frame having a receiving channel. The receiving channel includes a channel bottom and opposed interior wall surfaces having a first angle therebetween. The prescription plastic lens includes a prescription lens body generally defined by a peripheral edge having a bevel extending away from the edge to a vertex. The bevel has a distal portion with a second angle. The bevel is receivable within the receiving channel. At least a portion of the vertex of the bevel has an interference fit with the receiving channel bottom when held within the eyeglass frame. The first angle is greater than the second angle.
摘要:
An apparatus and a method for accommodating for differential in an ophthalmic lens grinding operation utilizing bevel edger machines. Such machines typically include a lens former assembly which has a former member upon which a particular frame shaped template rides to form the proper shape of the lens. The method includes the steps of adapting the former lens assembly of the bevel edger machine, externally of the differential settings of the machine, to provide a first profile for increasing the differential profile of the former member for a first lens-like material and allowing for providing a second differential for the former member which provides a proper differential for a second lens blank material. This may be accomplished in providing an adapter which is interposed between the former wheel and the lens template or a stepped former member. This provides for a new differential external to the internal adjustments of the machine. Additionally, there is provided a method for dry forming a polycarbonate lens whereby polishing of the bevel edge of the lens polycarbonate is accomplished which includes the steps of first dry grinding the rough polycarbonate lens and thereafter dry bevel edging a first periphery on the lens and thereafter wet finishing the peripheral surface around the lens whereby a polished polycarbonate lens edge is the result.