Finishing Performance of Magneto-Rheological Fluid under Magnetic Field

Yadav

Journal of Micromanufacturing

et al. 2021

Surface quality is the most crucial factor affecting the product lifespan and performance of any component. Most earlier technologies display accuracy in the micrometre or submicrometre range, surface roughness in the nanometre range, and almost no surface defects in the production of optical, mechanical and electronic parts. Such finishing methods incorporate a magnetic field to control the finishing forces using magnetorheological fluid as the polishing medium. Magnetorheological fluid (MR) consists of ferromagnetic and abrasive particles. It is a type of modern intelligent fluid. An optimum selection of magnetorheological fluid constituents and their volume concentration plays an essential role for the ultra-fine finishing of newly developed engineering products. Rheological characteristics of magnetorheological fluid can change rapidly and effortlessly with the support of an activated magnetic field. Traditional finishing methods are comparatively inferior in finishing complex freeform surfaces, due to the lack of controlling finishing forces and limitations of polishing tool movement over the complex freeform contour of the components. There are different types of processes based on the magnetorheological fluid including magnetorheological finishing, magnetorheological abrasive flow finishing, rotational magnetorheological abrasive flow finishing and ball end magnetorheological finishing. This article discusses the development of different types of magnetorheological-fluid-based finishing processes and their modes of operation. The MR fluid devices developed in the last decade are thoroughly reviewed for their working principles, characteristics and applications. This article also highlights the study of rheological characterization of magnetorheological fluid and its applications in different polishing methods appropriate for finishing various complex freeform components.

Section: Magnetorheological Polishing Fluid-based Nano-finishing Proc...mentioning

confidence: 99%

An overview of magnetorheological polishing fluid applied in nano-finishing of components

Yadav

Journal of Micromanufacturing

et al. 2021

Journal of Intelligent Material Systems and Structures

“…As a smart finishing method, magnetorheological finishing (MRF) relied on the rheology of magnetorheological polishing fluids (MRPF) within external magnetic field to remove materials greatly (Jain, 2009;Song et al, 2013;Yang et al, 2016). Usually, MRPF is prepared by dispersing magnetic particles and abrasive particles in a base carrier fluid that containing a certain number of additives (Jalali et al, 2020;Mangal and Kataria, 2018;Xiu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A shear stress model of water-based magnetorheological polishing fluids

Ma¹,

Cao²,

Xu³

et al. 2021

Magnetorheological polishing fluid (MRPF) with excellent rheological characteristics are efficient in material removal of workpiece. Shear stress is an important evaluation index of rheological characteristics, and is also an important research field of MRPF. In this study, a new shear stress model of MRPF is proposed, which is based on the application of Coulomb’s law in magnetic field. The interaction between magnetic particles on different magnetic chains and the effects of abrasive particles are considered in this model. The proposed model assumes that magnetic particles of MRPF slide in horizontal direction with shear behavior, and the exponential function is introduced to explain the relationship between the number of particles sliding and shear rate. Furthermore, the relationship between shear stress and shear rate is obtained by mathematical method. Compared with experimental data, theoretical model can effectively explain the variation of shear stress with shear rate. The correctness of the particle slip hypothesis has been verified by finite element method.

“…Friction induced temperature generation at the cutting zone also affects the surface roughness 17) . Lowering surface roughness or enhancing surface quality had been a prime aim of many researchers [18][19][20][21][22] . These difficulties serve as a motivation to do more research on the micromilling process and enhance it, specifically on its advanced application and machining of difficult-to-cut materials.…”

Section: Introductionmentioning

confidence: 99%

Recent Study on Hard to Machine Material – Micromilling process

Rosli¹,

Jamaludin²,

Razali³

2021

Evergreen

This paper presents an overview of the modern advancement of micromilling as pertained to the machining process from recent research and advancement perspective. The review starts by displaying the characteristics and micromilling contributions background, and later sets up the reader to difficult-to-cut materials. However, the fabricating process usually becomes complicated owing to these material's unique metallurgical properties. This paper brings to focus the micromilling of difficult-to-cut materials, especially materials that are currently the highlights of various industries. The discussion of research and attributes of difficult-to-cut materials are covered in further detail, which serves with opportunities for future developments.