Large-caliber optical primary mirror bore finish machining device

Abstract

The invention relates to a large-caliber optical primary mirror bore finish machining device which comprises a grinding assembly and three groups of optical primary mirror mounting and clamping assemblies, wherein the grinding assembly comprises a connecting body, a rotating assembly, a guide rail mounting plate, a linear guide pair, a grinding head assembly mounting plate, a transmission nut, a transmission lead screw, a grinding head lifting mechanism, a grinding head assembly, a guide rail sealing piece, an adjustment mechanism and a stroke control mechanism; each optical primary mirror mounting and clamping assembly comprises an adjustment screw supporting frame, an adjustment screw, a ball head cap and a ball head cap fixing ring; the grinding assembly has a working mode of being connected to a vertical lifting ram of a large vertical lathe through the connecting body; and the optical primary mirror mounting and clamping assemblies are uniformly fixed on a workbench of the large vertical lathe according to the size of the outer diameter of an optical primary mirror to clamp the excircle of the optical primary mirror. The grinding assembly is convenient to mount and flexibly to adjust the grinding and has simple structure and good practicability. The three groups of the optical primary mirror mounting and clamping assemblies are simultaneously used, and the excircle of the optical primary mirror is aligned by adjusting the adjustment screws, thus the method is simple and easy to apply.

Description

technical field [0001] The invention relates to the field of manufacturing optical primary mirror parts, in particular to a device for finishing the inner hole of a large-caliber optical primary mirror. Background technique [0002] As the research and development of my country's telescope series projects gradually develops in the direction of large-caliber (outer diameter greater than Φ1000mm), it is becoming more and more difficult to process large-caliber optical primary mirrors, and the finishing of the inner hole of the primary mirror has become one of the bottlenecks in the processing of primary mirrors. one. The shape and position accuracy of the inner hole of the primary mirror (generally required: cylindricity<0.015mm, verticality<0.01mm, coaxiality of inner and outer circles<0.1mm, roughness<Ra0.8) is an important characteristic of the primary mirror One, its quality directly affects the surface shape of the aspheric surface after assembly and filling, ...

AI Technical Summary

Problems solved by technology

With this method, it is cumbersome to install and align the primary mirror, and the risk is high; the processed surface quality is low (roughness is above Ra3.2); because the diamond grinding wheel is not easy to trim, it is easy to produce taper when grinding the inner and outer circles, and only small Processing of inner hole of primary optical mirror with caliber (outer diameter Φ500mm or less)

After patent search and non-patent literature search, there are no patents and literature related to the present invention

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