Nanofinishing of freeform surfaces (knee joint implant) by rotational-magnetorheological abrasive flow finishing (R-MRAFF) process

Kumar, Satish; Jain, V.K.; Sidpara, Ajay

doi:10.1016/j.precisioneng.2015.04.014

Cited by 108 publications

(43 citation statements)

References 20 publications

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“…But this process has limitations in terms of larger finishing time and non-uniformity in the finished surface. To overcome these problems, Satish et al [80], developed a new process known as R-MRAFF for finishing the complex surface with high finishing rate. With this process smooth mirror like surface finish is achieved by giving combined motion (axial and rotational) to the workpiece.…”

Section: Magnetorheological Abrasive Flow Finishing (Mraff)mentioning

confidence: 99%

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A review on magnetically assisted abrasive finishing and their critical process parameters

Kumari

Chak

2018

Manufacturing Rev.

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Magnetically assisted abrasive finishing (MAAF) processes are the precision material removal processes that have been applied to a large variety of materials from brittle to ductile and from magnetic to non magnetic. The MAAF process relies on a unique “smart fluid”, known as Magnetorheological (MR) fluid. MR fluids are suspensions of micron sized magnetizable particles such as carbonyl iron, dispersed in a non-magnetic carrier medium like silicone oil, mineral oil or water. The MAAF processes overcome the limitation of abrasive flow machining by deterministically control the abrading forces by applying magnetic field around the workpiece. MAAF process is divided into two parts; one is magnetorheological finishing (MRF) and another is magnetorheological abrasive flow finishing (MRAFF). The MRAFF process gives better results as compared to results of MRF because it has additional reciprocating motion of MR fluid. In this article the attempt has been made to review various technical papers related to MRF and MRAFF. The experimental setups, process parameters, MR fluid, modeling & optimization and applications are discussed in this paper. This review article will be useful to academicians, researchers and practitioners as it comprises significant knowledge pertaining to MAAF.

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Section: Magnetorheological Abrasive Flow Finishing (Mraff)mentioning

confidence: 99%

“…Kumar et al [80] developed R-MRAFF for finishing of freeform component similar to knee joint implant to nanometer level with uniform finishing of all faces. Figure 17 shows the knee joint implant before and after finishing through flexible brush created at the tip of polishing tool process.…”

Section: Machining Of Biomedical Componentmentioning

confidence: 99%

A review on magnetically assisted abrasive finishing and their critical process parameters

Kumari

Chak

2018

Manufacturing Rev.

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“…Therefore, rotation of the medium is attained in the existing setup by rotation of the magnetic field, and hence, the process is known as rotating MRAFF (R-MRAFF) process. Kumar et al [110] developed a fixture for femoral component (Fig. 15) which is one of the examples of freeform surfaces and carried out the experiments on it.…”

Section: Hybrid Finishing Processesmentioning

confidence: 99%

“…Comparisons of abrasive-based finishing processes, Jain and Jain[110]. Comparison of different advanced nano-finishing techniques used for freeform surfaces.…”

mentioning

confidence: 99%

Nanofinishing of freeform/sculptured surfaces: state-of-the-art

2018

Self Cite

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Freeform surfaces are being used in a multiplicity of applications in different kinds of industries related to Bio-medical (Bio-implants), micro channels in micro fluidics, automotives, turbine blades, impellers of artificial heart pumps, automobiles etc. Different parts in these industries need nano-level surface finish as their functional inevitability. It is very difficult and challenging to achieve high level of surface finish, especially on the components having freeform (or sculptured) surfaces, complex shapes, and 3-D features. Surface finish is a significant factor, which affects life and functionality of a product. Many traditional and advanced finishing processes have been developed for finishing of freeform/sculptured surfaces but still it has not been possible to achieve uniform nano level surface finish specially in case of freeform surfaces. To overcome the limitations of the existing nanofinishing processes, researchers are developing new processes for uniform nanofinishing of freeform surfaces. In this article, an attempt has been made to review different nanofinishing processes employed for freeform surfaces useful in different types of applications. In addition, experimental work, theoretical analysis and existing challenges of the finishing processes have been identified to fill the research gap.

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“…Parameswari et al 5 designed a multi-magnetic-pole polish tool using CNC milling to realize the MR nano-finishing of Ti6Al4V flat disk, which improved the rotational MR abrasive flow finishing (R-MRAFF) process of freeform surface (femoral component). 6,7 Liu et al 8 developed a small ball-end permanent magnet MRF machine tool for concave surfaces with small radius of curvature and the finished spherical surfaces with Ra less than 18 nm. Singh and colleagues 9,10 realized nano-polishing of 52100 steel using MR solid core rotating tool and designed a tray wheel gear profile MR polishing tool for EN-24 steel spur gear teeth surface.…”

Section: Introductionmentioning

confidence: 99%

Study on magnetorheological nano-polishing using low-frequency alternating magnetic field

Yin

Yang

et al. 2014

Advances in Mechanical Engineering

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With the development of electronics and optical industry, the high-efficiency ultra-precision polishing technologies of flat and curved surfaces are in high demand. The traditional magnetorheological polishing technology, using flexible polishing head, has the disadvantages of low polishing efficiency and small processing area. In this study, a novel tray-type magnetorheological polishing process using low-frequency alternating magnetic field excitation was developed to improve the efficiency of magnetorheological polishing for large surfaces and to make polishing magnetorheological cluster generate a cyclical fluctuation up and down, and then improve the cross-cutting effects of abrasives. With the developed excitation system, a large bowl-shaped varying magnetic field was generated in the working area, and the effects of current frequency, working gap, trough rotation speed, and workpiece rotation speed on the improvement rate of surface roughness and material removal rate were systematically investigated. A series of experiments were conducted on K9 glass specimens to verify the polishing performance. Experimental results show that the surface roughness of K9 glass was improved from 567.08 to 9.63 nm in 120 min.

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Nanofinishing of freeform surfaces (knee joint implant) by rotational-magnetorheological abrasive flow finishing (R-MRAFF) process

Cited by 108 publications

References 20 publications

A review on magnetically assisted abrasive finishing and their critical process parameters

A review on magnetically assisted abrasive finishing and their critical process parameters

Nanofinishing of freeform/sculptured surfaces: state-of-the-art

Study on magnetorheological nano-polishing using low-frequency alternating magnetic field

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