Finishing of OFHC copper using fluid filled open-cell porous flexible abrasive impregnated tools

Kumar, Mayank; Sidpara, Ajay; Racherla, Vikranth

doi:10.1177/09544054221111879

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…The nanofinished surface has a final Ra of 48 nm and Sa of 140 nm. The percentage reduction in surface roughness (Ra/Sa) and finishing rate can be estimated using the following equations 17 :…”

Section: Arithmetic Mean Heightmentioning

confidence: 99%

Precision finishing of nickel-phosphorus plated carbon fibre reinforced polymer

Kumar,

Sidpara

2024

Surface Engineering

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Carbon fibre reinforced polymer is a lightweight material having superior mechanical properties and thermal stability and a promising material for light-weight mirrors for space applications. In this work, the surface of carbon fibre reinforced polymer is electroless nickel-phosphorus plated. The morphologies of the substrate and as-plated surfaces are compared. The surface roughness of the plated surface showed a significant reduction after the plating process. The elemental composition and phase of the as-plated sample are studied. The plated carbon fibre reinforced polymer surface is polished using an elastic tool with a diamond abrasive pad having grit sizes of 45 and 9 μm. The topography and the morphology of the finished surface are analysed for understanding the material removal process. A minimum Ra of 48 nm is obtained on the plated surface after 28 min of polishing. At a finishing rate of 18.17 nm/min, a 91.4% drop in Ra is achieved in comparison to a plated surface.

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Section: Arithmetic Mean Heightmentioning

confidence: 99%

Precision finishing of nickel-phosphorus plated carbon fibre reinforced polymer

Kumar,

Sidpara

2024

Surface Engineering

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“…This is related to tangential cutting force. The combination of both normal and tangential cutting forces is responsible for effective material removal from the workpiece surface [25].…”

Section: Magnetorheological Finishing Of Chemically Treated Surfacementioning

confidence: 99%

Magnetorheological Finishing of Chemically Treated Electroless Nickel Plating

et al. 2022

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Electroless nickel plating with a nanofinished surface is used in space mirrors, automobile parts, aircraft components, optical instruments, and electronic equipment. Finishing of these components using conventional finishing techniques is limited due to size, shape, material, and process constraints. This work reports the nanofinishing of electroless nickel-plated surfaces using a magnetorheological finishing process where the surfaces are pre-treated with chemicals. The chemicals used in this work are hydrogen peroxide (H2O2) and hydrofluoric acid (HF). The effect of exposure time and concentration on the microhardness and roughness is studied to understand the surface chemistry after chemical treatment. The hydrogen peroxide forms a passivated layer, and it helps in easy material removal. Hydrofluoric acid improves surface quality and also helps in the removal of contaminants. The finished surface is characterized to understand the effect of chemical treatment on the finishing rate and surface topography. Normal and tangential forces are mainly affected by the hardness and surface condition after the chemical treatment. The best combination of parameters (chemical treatment with 1% HF for 30 min) was obtained and finishing was carried out to obtain a nanofinished surface with its areal surface roughness (Sa) reduced to 10 nm.

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“…Particle separation from the MR fluid ribbon is linked to the breaking up and separation of CIPs chains into spikes. Using an open-cell porous flexible abrasive tool, Kumar et al 9 finished OFHC copper to 54 nm from 946 nm surface roughness. The selected process parameters were tool compression, tool rotation and abrasive particle concentration.…”

Section: Introductionmentioning

confidence: 99%

Research on the mechanism of particles separation in magnetorheological fluid-based finishing process

Dubey

Sidpara

Lakkaraju

2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Magnetorheological fluid-based finishing is one of the recognized techniques for precisely finishing of a variety of components. Material removal depends largely on velocity and compression of the magnetorheological (MR) fluid ribbon when it interacts with the workpiece. This article studies the throwing of magnetic and abrasive particles during carrier wheel rotation. Theoretically computed centrifugal and magnetic forces are balanced against each other to determine the speed at which these particles are ejected from the MR fluid. The results of experiments at various carrier wheel speeds show the reduction of MR fluid ribbon thickness at higher wheel speed due to throwing of MR fluid. As a result of particle separation from the MR fluid at high rotational speed. As the carrier wheel speed increases, surface roughness decreases initially and then increases. There is good agreement between theoretical and actual results for the spindle speed at which magnetic particles depart the MR fluid ribbon.

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Finishing of OFHC copper using fluid filled open-cell porous flexible abrasive impregnated tools

Cited by 9 publications

References 38 publications

Precision finishing of nickel-phosphorus plated carbon fibre reinforced polymer

Precision finishing of nickel-phosphorus plated carbon fibre reinforced polymer

Magnetorheological Finishing of Chemically Treated Electroless Nickel Plating

Research on the mechanism of particles separation in magnetorheological fluid-based finishing process

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