Combined polishing method of aluminum alloy reflecting mirrors

Abstract

The invention discloses a combined polishing method of aluminum alloy reflecting mirrors. The method comprises the following implementation steps: the numerical control milling rough machining and thesingle-point diamond turning are performed on workpieces to be machined to obtain aluminum alloy reflecting mirror surfaces which meet initial surface shapes and surface quality requirements; then, magnetorheological shape correction is iteratively performed; and a small grinding head is used for polishing until the aluminum alloy reflecting mirror surfaces of the workpieces to be machined meet index requirements. The method can solve associated turning lines in the cutting process of the aluminum alloy reflecting mirrors, and overcomes the problems of weak shape correction of complex curvedsurfaces and weak surface quality improvement in a traditional aluminum alloy reflecting mirror polishing technology; and the polishing method can perform high-precision certain shape correction on the aluminum alloy reflecting mirrors, meanwhile, obtains higher-quality polishing surfaces, further improves low-defect manufacturing capacity of optical parts, and develops a new path for ultra-precise machining of the optical parts.

Description

technical field [0001] The invention relates to an optical element processing technology, in particular to a combined polishing method for an aluminum alloy reflector. Background technique [0002] Aluminum alloy has the advantages of easy processing, light weight, high thermal conductivity and low cost. Many spacecraft optical systems use aluminum materials as structural components when they are used in low temperature applications. In addition, aluminum materials have a wide range from ultraviolet light to infrared light. It has high reflectivity in the spectral range and is often used to make reflective mirrors. Metal mirrors have been widely used in various space and military application optical systems. The performance of the optical system depends largely on the surface accuracy and surface quality of the optical components. The use of aspheric optical components can not only greatly improve the performance of the optical system Improve the imaging quality, expand the...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the above-mentioned problems in the prior art, a combined polishing method for aluminum alloy reflectors is provided. The present invention can solve the accompanying turning lines in the cutting process of aluminum alloy reflectors, and overcome the traditional aluminum alloy reflectors. Due to the shortcomings of polishing technology in the modification of complex curved surfaces and the improvement of surface quality, the polishing method of the present invention can perform high-precision and deterministic modification of the aluminum alloy reflector, and at the same time obtain a high-quality polished surface, further improving the low-cost optical parts. Defect manufacturing capability opens up a new way for ultra-precision processing of optical parts in my country

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