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Modeling and Experimental Verification of Time-Controlled Grinding Removal Function for Optical Components.

Fulei Chen1,2,3, Xiaoqiang Peng1,2,3, Zizhou Sun1,2,3

  • 1College of Intelligent Science and Technology, National University of Defense Technology, Changsha 410073, China.

Micromachines
|July 29, 2023
PubMed
Summary

Time-controlled grinding (TCG) using an abrasive belt enables deterministic machining of optical components. This method establishes a controllable removal function, improving surface accuracy and roughness for large-diameter optics.

Keywords:
abrasive beltdeterministic machiningoptical componentsremoval functiontime-controlled grinding

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Area of Science:

  • Optics and Materials Science
  • Precision Engineering
  • Manufacturing Technology

Background:

  • Abrasive belt grinding is efficient for mechanical parts but lacks control for ultra-precision optical processing.
  • Deterministic machining requires a stable and predictable material removal function.

Purpose of the Study:

  • To apply time-controlled grinding (TCG) with an abrasive belt for deterministic machining of optical components.
  • To develop and validate a theoretical model for the TCG removal function.

Main Methods:

  • Established a theoretical model for the TCG removal function based on the Preston equation.
  • Conducted removal function experiments to validate the theoretical model.
  • Performed theoretical and experimental shaping on 200 mm × 200 mm flat glass-ceramic.

Main Results:

  • The surface shape error of glass-ceramic converged from 6.497 μm PV / 1.318 μm RMS to 5.397 μm PV / 1.115 μm RMS.
  • Surface roughness improved from 271 nm Ra to 143 nm Ra.
  • Experimental results showed strong agreement with the theoretical model.

Conclusions:

  • The developed removal function model effectively guides TCG shaping experiments.
  • TCG demonstrates potential for deterministic machining of large-diameter optical components.
  • This approach enhances precision and controllability in optical manufacturing.