Rheological properties of abrasive magnetorheological fluids for immersed tumbling processes

Conference: ACTUATOR 2024 - International Conference and Exhibition on New Actuator Systems and Applications
06/13/2024 - 06/14/2024 at Wiesbaden, Germany

Proceedings: GMM-Fb. 110: ACTUATOR 2024

Pages: 4Language: englishTyp: PDF

Authors:
Sordon, Fabian; Lahoda, Christian; Uhlmann, Eckart; Maas, Juergen

Abstract:
Micro-milling tools face challenges related to wear and edge homogeneity, which are addressed through various postprocessing methods including grinding with magnetorheological fluids (MRF). This paper explores the rheological properties of abrasive MRF, crucial for optimizing performance of recently investigated MRF immersed tumbling processes. A full factorial design of experiments investigates the effects of carbonyl iron particle (CIP) and abrasive particle (AP) volume fractions and AP diameter on yield point and dynamic viscosity. Using a specially developed rheometer test bench 27 different MRF compositions are evaluated. Results show that increasing CIP and AP volume fractions heighten shear stresses, while smaller AP diameters enhance shear stresses due to their solid-state chain embedding.