Machining method of flexible stress isolation thin ring for precise optical-mechanical system

Abstract

The invention provides a machining method of a flexible stress isolation thin ring for a precise optical-mechanical system. The method comprises the following specific steps that S1, rough machining is carried out, specifically a blank is roughly turned to be a cylindrical workpiece, the inner diameter and the outer diameter of the workpiece both reserve allowance, and primary heat treatment is carried out on the roughly turned workpiece to remove internal stress; S2, semi-finish machining is conducted, specifically, one end of the workpiece is clamped on a machine tool and turned into all thin rings, allowance is reserved for the thickness of each thin ring, every two adjacent thin rings are connected with each other through the roots of the inner diameters, and then the workpiece is subjected to second-time heat treatment to remove internal stress; S3, finish machining is carried out, specifically the thickness and the inner diameter of each thin ring on the cylindrical workpiece aremachined to target values in sequence, the workpiece is cut off to obtain the single thin rings, and S4, the end faces of the single thin rings are subjected to linear cutting to machine flexible patterns. The method has the advantages of simple process, material saving, cost reduction, high processing efficiency and high yield.

Description

Technical field [0001] The invention relates to the technical field of manufacturing optical mechanical structural parts, in particular to a method for processing a flexible stress isolation thin ring used in a precision optical mechanical system. Background technique [0002] With the improvement of the level of optical design, the requirements of the optical system for the surface shape accuracy of the lens are getting higher and higher. In order to avoid the deterioration of the surface shape of the optical lens due to the deformation of the mechanical structure, the optical system is generally The structure design of the flexible isolation ring will be used to isolate the effect of external stress on the change of the mirror surface shape. Therefore, the processing accuracy index of the flexible stress isolation ring is directly related to the imaging quality of the final assembled optical system. [0003] The axial thickness of flexible stress isolation parts is generally abo...

AI Technical Summary

Problems solved by technology

[0005] 1. The clamping force introduced by the clamping force to the thin-walled ring parts is too large;

[0006] 2. Due to the cutting force and the stress of the material itself, it is extremely easy to cause the thin-walled ring-shaped parts to deform themselves, such as distortion, resulting in uneven distribution of rigidity in the circumferential direction of the parts. The stress and deformation of the lens will also directly lead to the deformation of the lens connected to it, resulting in a high rejection rate

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