Multiplex path for magnetorheological jet polishing with vertical impinging.

Area of Science:

• Optical Engineering
• Materials Science
• Manufacturing Processes

Background:

• Magnetorheological jet polishing (MJP) typically uses an M-shaped removal function, resulting in a W-shaped profile along a single path.
• Achieving a Gaussian-like removal profile, common in precision optics, usually requires a different tool function or complex path planning.
• Existing MJP methods face challenges in achieving high-precision surface form control due to the inherent removal profile.

Purpose of the Study:

• To develop a novel surface shaping method for magnetorheological jet polishing (MJP) by optimizing tool path strategies.
• To demonstrate that path optimization can achieve a Gaussian-like removal profile without altering the MJP tool's removal function.
• To establish a transformation model for velocity function determination on multiplex paths for full aperture polishing.

Main Methods:

• Investigated surface shaping by optimizing the polishing path rather than the removal function of the MJP tool.
• Developed a multiplex path strategy using two parallel paths to achieve a V-shaped track profile, mimicking a Gaussian removal distribution.
• Established a transformation model to relate the M-shaped removal function to a Gaussian removal function for velocity control on multiplex paths.

Main Results:

• Successfully demonstrated a multiplex path strategy for MJP, achieving a V-shaped profile with a Gaussian-like removal distribution.
• Reduced form error on 23 mm diameter K9 work-pieces from 0.256λ PV and 0.068λ RMS to 0.038λ PV and 0.005λ RMS using a scanning multiplex path.
• Validated the effectiveness of path optimization for precision optical manufacturing applications.

Conclusions:

• Path optimization offers a viable alternative to modifying removal functions for achieving high-precision surface shaping in MJP.
• The developed multiplex path strategy and velocity function are effective for full aperture polishing.
• This approach significantly enhances form accuracy and is suitable for advanced optical manufacturing.