Magnetorheological finishing device applicable to ultra-large-diameter optical processing

Abstract

The invention relates to a magnetorheological finishing device applicable to ultra-large-diameter optical processing. The magnetorheological finishing device comprises a magnet device and a magnetorheological fluid circulating device. The magnet device is capable of providing a magnetic field, the lower end of the magnet device is provided with a horizontal protruding section, and the magnetorheological fluid circulating device enables magnetorheological fluid flowing through the horizontal protruding section to form a ribbon protrusion under the action of the magnetic field perpendicular to the flowing direction. The magnetorheological finishing device applicable to ultra-large-diameter optical processing can be modified on a finishing machine tool to replace a finishing head, such as a stress plate, a small grinding head and the like of the finishing machine tool without changing an original mechanical structure of the machine tool. The magnetorheological finishing device has the advantages that system size is reduced, mechanical structure is simplified, material removal efficiency is improved, and accordingly the current problems of long processing period and low removal efficiency of large-diameter aspherical processing are solved.

Description

technical field [0001] The invention belongs to the technical field of precision optical polishing, and in particular relates to a magnetorheological polishing device suitable for ultra-large-diameter optical processing. Background technique [0002] Large-aperture optical systems can effectively improve spatial angular resolution and energy collection capabilities, and are widely used in space telescopes and high-precision ground imaging. However, large-diameter mirrors need to remove more materials during the grinding and polishing process, so as to improve processing efficiency and shorten the processing cycle without reducing the processing accuracy. [0003] Magneto-rheological polishing technology began in the 1970s. In 1974, W.I.Kordonski of the Institute of Heat and Mass Transfer in the former Soviet Union used magnetorheological fluids in mechanical processing. By the early 1990s, W.I.Kordonski cooperated with the Optical Manufacturing Center of the University of R...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of low material removal efficiency of existing magnetorheological polishing devices, and to provide a magnetic flux that can be applied to high-efficiency and high-precision processing of large-diameter optical elements and is suitable for ultra-large-diameter optical processing. Variable polishing device

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