Magnetorheological finishing device for high-steepness optical part

Abstract

The invention relates to a magnetic rheological polishing device used in an optical part with high gradient, comprising a machine tool, a magnetic rheological polishing device and a control system which is connected with the above components. The machine tool comprises a horizontal base seat and a vertical base seat, an X axial linear motion mechanism and a Y axial linear motion mechanism are arranged on the horizontal base seat in a cross shape, the X axial linear motion mechanism is fixed on a slider of the Y axial linear motion mechanism, a Z axial linear motion mechanism is arranged on the vertical base seat, a C axial rotary worktable used for arranging the magnetic rheological polishing device is arranged on a slider of the X axial linear motion mechanism, a B axial rotary worktable used for arranging a work piece fixture is arranged on a slider of the Z axial linear motion mechanism, an A axial rotary worktable used for driving the work piece to be processed is arranged at the tail end of the work piece fixture, and the magnetic rheological polishing device is horizontally opposite to the work piece to be processed. The device of the invention has the advantages of simple and compact structure, low cost and easy control, and can realize the processing of the optical part with the high gradient.

Description

technical field [0001] The invention mainly relates to the technical field of magnetorheological polishing, in particular to a magnetorheological polishing device for high-steep optical parts. Background technique [0002] Deterministic polishing of high-steep optical parts is a key technical problem in the field of optical parts processing. High-steep optical parts are mainly used in windows of aircraft, lenses and windows of thermal imagers, windows of advanced weaponry photoelectric systems, and missile fairings. The aircraft has good aerodynamic properties. The key requirements for deterministic polishing of high-steep optical parts are: the processing range of the polishing device covers the entire processing surface of high-steep optical parts; and a deterministic polishing removal model is realized on the surface of high-steep optical parts with large curvature radius changes. Traditional optical polishing technology has been unable to achieve deterministic polishin...

AI Technical Summary

Problems solved by technology

like figure 1 , 2 , 3 are schematic diagrams of some magnetorheological polishing devices established by existing research institutes in China. Harbin Institute of Technology has successively adopted figure 1 and figure 2 In the processing method shown, since the magnetorheological polishing spots formed in this patent are relatively large, when the curvature radius of the high-steep parts changes, the removal model also changes accordingly, and it is difficult to achieve magnetorheological deterministic polishing. It is not suitable for the processing of high-steep parts; Chinese patent number: 03153996.3, invention name: electromagnetic magnetorheological polishing head, which is developed by Tsinghua University such as image 3 The orbital and self-rotating polishing wheel device shown

Because in this device, the polishing wheel rotates and revolves at the same time, thus forming a large Gaussian shape removal function, the radius of curvature of the high-steepness part changes drastically, and the device is difficult to form a stable removal function, so the system is not suitable for high-steepness Processing of optical parts

Chinese patent application number: 200610043079.1, invention name: magnetorheological flexible fine grinding and polishing equipment and method, this invention can not solve the problem of high steepness optical parts processing

From the above-mentioned published patents, it can be obtained that current magnetorheological polishing devices are basically only aimed at flat or spherical and aspheric surfaces with small curvature radii, and have not been able to achieve magnetorheological deterministic polishing of high-steep optical parts. To achieve this, the following must be solved technical problem:

[0005] 2. The radius of curvature of high-steep parts changes drastically. To achieve deterministic polishing, a new type of magnetorheological polishing device must be designed to meet high-steep curvature changes.

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