A micro-fluidity composite polishing mold for large-diameter easily deformable zinc sulfide optical window parts and its manufacturing method

Abstract

The invention provides a micro-liquidity composite polishing die for large-caliber easily deformed zinc sulfide optical window parts and a manufacturing method of the micro-liquidity composite polishing mold. The polishing die comprises a polishing die body, a base layer, a die cushion layer and a polishing layer. A low-expansion high-stability material is adopted as the polishing die body, optical asphalt and a die cushion are combined to serve as a base material, and the novel polishing die is formed by hot pressing molding of a standard plane pressing plate, so that the optical asphalt andthe die cushion are tightly combined. Micro holes are formed in the die cushion material, and the die cushion is soaked in the optical asphalt, so that the die cushion is tightly combined with the upper layer of optical asphalt and the lower layer of optical asphalt, the flow of the upper-layer optical asphalt and the flow of the lower-layer optical asphalt are stably controlled, and the defect that the upper-layer optical asphalt and the lower-layer optical asphalt flow easily is overcome.

Description

technical field [0001] The invention belongs to the technical field of cold processing of optical parts, in particular to a microfluidity composite polishing mold for large-caliber easily deformable zinc sulfide optical window parts and a manufacturing method thereof. Background technique [0002] The polishing principle of optical glass adopts the principle of mechanical grinding, which is the result of tiny cutting action on the glass surface based on sharp and hard abrasive particles. Traditional (classical) polishing dies usually consist of a body (usually aluminum alloy or steel) and a substrate (such as sanding pads, asphalt, fabric or felt). For large-caliber deformable multi-spectral zinc sulfide optical window optical parts above 600mm, since the zinc sulfide optical material itself is a brittle material with a soft surface and poor wear resistance, and the ratio of window glass diameter to thickness is too large, the overall Factors such as heavy weight and high s...

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Problems solved by technology

Among them, the effect of magnetorheological ultra-smooth polishing mainly depends on the processing accuracy of magnetorheological polishing equipment, but currently there is no magnetorheological ultra-smooth polishing equipment that can be used for polishing large-diameter and deformable multi-spectral zinc sulfide optical windows above 600mm; However, the traditional (classical) large-scale asphalt grinding and polishing method has problems such as long processing cycle for large-caliber optical parts (for 600mm-caliber optical parts, the entire process processing cycle is not less than half a year), uneven surface shape accuracy, etc., resulting in large-diameter parts above 600mm Difficult Polishing of Deformable Multispectral ZnS Optical Window

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