Magnetorheological finishing edge removal function modeling and edge effect suppressing method

A magnetorheological polishing and edge effect technology, which is applied in grinding/polishing equipment, manufacturing tools, grinding automatic control devices, etc., can solve the problems of low processing accuracy, poor control of edge surface shape, and edge removal function shape big error

Active Publication Date: 2020-03-17
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the defects of the edge removal function compensation method in the existing method for suppressing the edge effect of magnetorheological polishing lead to large shape errors of the edge removal function

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  • Magnetorheological finishing edge removal function modeling and edge effect suppressing method
  • Magnetorheological finishing edge removal function modeling and edge effect suppressing method
  • Magnetorheological finishing edge removal function modeling and edge effect suppressing method

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Embodiment 1

[0076] The present invention relates to a magnetorheological polishing edge removal function modeling and edge effect suppression method, the method comprising the following steps:

[0077] S1. Under the given magnetorheological polishing satin immersion depth and spot sampling time, collect non-edge polishing spots and polishing spots with different contact distances in the two cases of cutting into the edge and cutting out the edge, so as to obtain non-edge The length and width of the polishing spot;

[0078] S2. According to the length and width of the non-edge polishing spot obtained in step S1, a parameterized model of magnetorheological polishing removal function based on Bezier splines is established;

[0079] S3. Establishing an edge removal function reconstruction method for different contact states, and performing geometric modeling; wherein, the contact state includes two cases of cut-in and cut-out;

[0080] S4. Formulate a dwell time solution strategy based on th...

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Abstract

The invention discloses a magnetorheological finishing edge removal function modeling and edge effect suppressing method. The method comprises the following steps of S1, under a certain finishing ribbon immersion depth and spot collection time, collecting non-edge finishing spots and finishing spots at different contact distances in two situations of cut-in edge and cut-out edge respectively, andacquiring the length and width of the non-edge finishing spots; S2, establishing a Bezier spline-based magnetorheological finishing removal function parameterization model; S3, establishing edge removal function reconstruction methods at different contact states; and S4, formulating a residence time solving strategy based on an edge removal function model. According to the method, the designed removal function model has the analytical form and the high geometric degree of freedom, the problems that a current magnetorheological finishing edge removal function compensation method is large in form error and poor in edge surface shape control are solved, and the model precision of the edge removal function and the suppression level of the edge effect are improved.

Description

technical field [0001] The invention relates to the technical field of ultra-precision machining of optical elements, in particular to a method for modeling an edge removal function and suppressing edge effects in magneto-rheological polishing. Background technique [0002] Magnetorheological polishing (MRF) has the characteristics of high flexibility, less damage, and strong controllability. It is an ideal polishing method to control the edge effect of optical components. In the magnetorheological process, when the polishing head moves to the edge area of ​​the workpiece, the contact area changes, resulting in distortion of the shape of the removal function, which makes the shape of the edge removal function different from the normal removal function. When the normal removal function is used for processing in the process , the edge shape error will be distorted, this effect is called edge effect. [0003] From the analysis of the mechanism of hydrodynamic pressure, the edg...

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Application Information

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IPC IPC(8): B24B1/00B24B51/00
CPCB24B1/005B24B51/00
Inventor 樊炜张云飞黄文刘晓卓周涛田东
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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