Accounting for MRF® spot removal rate variation caused by plunge depth deviation

Stephen Watson; Chris Hall; Mike DeMarco

doi:10.1117/12.2536826

15 November 2019 Accounting for MRF® spot removal rate variation caused by plunge depth deviation

Stephen Watson, Chris Hall, Mike DeMarco

Proceedings Volume 11175, Optifab 2019; 111750O (2019) https://doi.org/10.1117/12.2536826
Event: SPIE Optifab, 2019, Rochester, New York, United States

Abstract

The determinism of the MRF optical polishing process relies on a well-characterized and stable removal rate during polishing runs. The workpiece immersion depth into the MR fluid is a main contributor to the removal rate. During polishing, the CNC machine platform attempts to maintain a consistent immersion depth throughout the toolpath to keep the removal rate constant. Polishing aspheric parts with either significant wedge or unaccounted for aspheric shape can result in unpredicted removal rate errors due to a change in plunge depth. By accounting for the figure error expected from the change in plunge depth in the hitmap, the removal error resulting from high amounts of wedge and aspheric departure can be mitigated. This process allows MRF to figure correct highly wedged parts and to reduce MRF iterations on challenging aspheric parts.

Conference Presentation

Citation Download Citation

Stephen Watson, Chris Hall, and Mike DeMarco "Accounting for MRF® spot removal rate variation caused by plunge depth deviation", Proc. SPIE 11175, Optifab 2019, 111750O (15 November 2019); https://doi.org/10.1117/12.2536826

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available