A Novel High-Precision Workpiece Self-Positioning Method for Improving the Convergence Ratio of Optical Components in Magnetorheological Finishing
Yiang Zhang, Pengxiang Wang, Chaoliang Guan, Meng Liu, Xiaoqiang Peng, Hao Hu
TL;DR
This paper introduces a new method for positioning workpieces in magnetorheological finishing to improve optical component manufacturing efficiency and precision.
Contribution
A hybrid self-positioning method combining machine vision and a probing module is proposed to enhance convergence and reduce alignment time.
Findings
The proposed method improves flat workpiece convergence by 41.9% and reduces alignment time by 66.7%.
For curved workpieces, convergence improves by 25.7% with an 80% reduction in alignment time.
A positioning error-normal contour error transmission model is established to set error tolerance thresholds.
Abstract
Magnetorheological finishing is widely used in the high-precision processing of optical components, but due to the influence of multi-source system errors, the convergence of single-pass magnetorheological finishing (MRF) is limited. Although iterative processing can improve the surface accuracy, repeated tool paths tend to deteriorate mid-spatial frequency textures, and for complex surfaces such as aspheres, traditional manual alignment is time-consuming and lacks repeatability, significantly restricting the processing efficiency. To address these issues, firstly, this study systematically analyzes the effect of six-degree-of-freedom positioning errors on convergence behavior, establishes a positioning error-normal contour error transmission model, and obtains a workpiece positioning error tolerance threshold that ensures that the relative convergence ratio is not less than 80%.…
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Taxonomy
TopicsAdvanced Surface Polishing Techniques · Advanced Measurement and Metrology Techniques · Advanced Numerical Analysis Techniques