Device and method for polishing symmetrical optical component of small-caliber rotating shaft

Abstract

The invention discloses a device and a method for polishing a symmetrical optical component of a small-caliber rotating shaft. The device comprises a sealed container mechanism, a workbench drive system which is installed in an inner cavity of the sealed container mechanism and a polishing fluid circulating system which is connected with the sealed container mechanism; and a negative pressure space is formed in the upper part of the inner cavity of the sealed container mechanism. During the polishing, a suction effect of negative pressure difference is utilized for sucking and compositing polishing fluid, a negative pressure cavitation effect is utilized for machining a workpiece surface, a normal pressure environment of machining is changed into a negative pressure environment, air disturbance in an injection process is reduced, a polishing point can be reduced, and the sliding friction function and stability of micro and fine abrasive particles are increased; and moreover, the negative pressure cavitation effect forms strong cavitation shock wave and high speed micro jet, so that the removal efficiency of the workpiece surface is increased. Materials are removed under the combined action of abrasive particle cutting and cavitation erosion, so that the surface with high quality is obtained. The device is suitable for polishing various rotating symmetroid optical components, and has a high practicable value in automatic processing.

Description

technical field [0001] The invention belongs to the technical field of ultra-precision optical polishing processing, and relates to a fluid polishing device and method suitable for processing the curved surface of a small-diameter rotary axis-symmetrical optical element. Background technique [0002] With the sharp increase in the demand for small-caliber optical components in digital cameras, mobile phones, photographic devices, endoscopes, aiming systems and other products, the requirements for the quality of their processed surfaces are also getting higher and higher. For optical components and molds with small-diameter rotary axis symmetry, the grinding process can generally achieve high shape accuracy and smooth mirror surface, but in the case of strict requirements, surface defects and damages after grinding must be polished with free abrasive grains to improve surface quality. For the polishing of small-diameter rotary axis-symmetrical workpieces below a few millimet...

AI Technical Summary

Problems solved by technology

However, the traditional high-pressure abrasive jet is carried out in an open air environment with atmospheric pressure. The fluid is greatly disturbed by aerodynamic force, and the outward expansion is greatly affected, resulting in a large polishing point, which limits the minimum processing scale of the jet beam and is difficult to achieve. Shape correction polishing; in addition, the high-pressure generating device used for high-pressure jet has a complex structure, high energy consumption, high cost, and unstable performance

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