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A deduction method for magnetorheological polishing removal function based on curvature and immersion depth

A technology of magnetorheological polishing and immersion depth, which is applied in special data processing applications, geometric CAD, design optimization/simulation, etc. It can solve problems such as high cost, low efficiency, and complex removal function modeling process to reduce model accuracy The effect of ensuring the solution efficiency and solving the effect of large errors in the geometric model

Active Publication Date: 2022-06-17
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: under the curvature effect of current magnetorheological polishing technology, the removal function modeling process is complicated, the cost is high, and the efficiency is low. The present invention provides a magnetic The rheological polishing removal function deduction method is especially suitable for meeting the current high-efficiency and high-precision process requirements for large-diameter and high-steep aspheric magnetorheological polishing

Method used

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  • A deduction method for magnetorheological polishing removal function based on curvature and immersion depth
  • A deduction method for magnetorheological polishing removal function based on curvature and immersion depth
  • A deduction method for magnetorheological polishing removal function based on curvature and immersion depth

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Embodiment 1

[0051] The present embodiment provides a magnetorheological polishing removal function deduction method under the curvature effect, and the specific steps are:

[0052] Step 1, under certain process parameters, collect polishing spots with different immersion depths on the plane and spherical mirrors with different curvatures, and obtain the experimental removal function. Specifically, the immersion depth range is 0.25mm to 0.4mm, the curvature of the convex spherical surface is negative, the curvature of the concave spherical surface is positive, and the curvature range is -1 / 200mm -1 to 1 / 200mm -1 , each polishing spot is denoted as R mn , where m=0…6, n=0…2, a total of 21 spots were collected. The experimental specimens and spot sampling parameters are shown in Table 1:

[0053] Table 1: Experimental Specimen and Spotting Parameter Information

[0054]

[0055] The spot picking method is the normal circular spot picking method, such as figure 1 As shown, the figure ...

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Abstract

The invention discloses a magneto-rheological polishing removal function deduction method, comprising the steps of: under given process parameters, respectively collect polishing spots with different immersion depths on spherical mirrors with different curvatures to obtain experimental removal functions; The spline magnetorheological polishing removal function parameterization model and the particle swarm optimization algorithm calculate the shape coefficients corresponding to each removal function; the corresponding relationship between the removal function shape coefficients under different curvatures and immersion depths relative to the reference spot shape coefficients is established, and the removal The normalized shape coefficient of the function; establish the change law function of the magnetorheological polishing removal function about the curvature and immersion depth; according to the change law function of the shape coefficient of the removal function, construct the reverse deductive model of the magnetorheological polishing removal function under the curvature effect, and solve the curvature and Removal function corresponding to immersion depth. The invention solves the problems of large error of the removal function model, high acquisition cost and low efficiency under the curvature effect of the current magneto-rheological polishing.

Description

technical field [0001] The invention relates to the technical field of ultra-precision machining of optical elements, in particular to a magnetorheological polishing removal function deduction method based on curvature and immersion depth. Background technique [0002] Magnetorheological polishing is a deterministic polishing technology with stable removal rate, high removal efficiency and low sub-surface damage. Its flexible polishing ribbon can produce a good fit with the curved surface during processing, and has excellent polishing to the curved surface. Processing capability is an important technological means to achieve efficient convergence of the surface shape of aspheric optical components. The development and utilization of high-order aspherical optical systems make modern high-end defense weapons and equipment and scientific research and exploration equipment put forward more demands for large-caliber, high-precision aspherical optical components. However, the cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/25G06F30/27B24B1/00
CPCG06F30/17G06F30/25G06F30/27B24B1/005
Inventor 樊炜张林黄文张云飞刘军周涛李凯隆郑永成陈立田东张建飞
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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