Refining device for hemispherical lenses

Abstract

Provided is an accurate grinding device of a hemispherical lens. An accurate grinding device body A, an accurate grinding device body B, an accurate grinding device body C and an accurate grinding device body D are of the same structure and are adopted for grinding, grinding blocks adopted for the accurate grinding device bodies are made of 1200 metal, 1500 metal, 1500 resin and 1800 resin in sequence, and the lens is ground on the accurate grinding device body A, the accurate grinding device body B, the accurate grinding device body C and the accurate grinding device body D in sequence. The lens is ground through four processes; compared with two processes in the prior art, grinding loss is small, a die is consumed slowly, and the lens has higher stability after being ground on the accurate grinding device. A hard die is adopted for the accurate grinding device body A so that the hard die can be low in loss, traces formed on the surface of the lens can be removed in the follow-up grinding process, quality of the ground lens is improved, and service life of the lens is prolonged.

Description

technical field [0001] The invention relates to the technical field of lens processing, in particular to a process for finely grinding hemispherical lenses. Background technique [0002] At present, in the lens industry on the market, after the lens is processed and formed, in order to prevent the lens from cracking during the production process, a 45° bevel is usually made between the side of the lens and the mirror surface, which is called the inversion of the lens. horn. The chamfering of traditional lenses adopts two processes. The operator needs to require the same radius of curvature of the mold to ensure fine grinding. When processing hemispherical lenses, the first step is to grind with a harder abrasive tool, which is prone to scratches on the surface of the lens. These scars cannot be removed by the second grinding. Therefore, the traditional fine grinding method has a large amount of wear, fast consumption of molds, easy to change, and unstable processing. And b...

AI Technical Summary

Problems solved by technology

The chamfering of traditional lenses adopts two processes. The operator needs to require the same radius of curvature of the mold to ensure fine grinding. When processing hemispherical lenses, the first step is to grind with a harder abrasive tool, which is prone to scratches on the surface of the lens. These scars cannot be removed by the second grinding. Therefore, the traditional fine grinding method has a large amount of wear, fast consumption of molds, easy to change, and unstable processing.

And because of the experience of many manual operators and the difference of the grinding machine, the chamfering parts of the two sides of the lens are often large and small, which is difficult to grasp, resulting in uneven chamfering of the lens, which requires a high level of craftsmanship for manual operators. , it usually takes about two years to develop a proficient skill

Many large manufacturers adopt chamfering devices imported from abroad, and the integrated equipment of chamfering devices imported from abroad is expensive, and different procedures must be selected for lenses of different materials. Convenience, the device is difficult for ordinary lens manufacturers to use

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