Journal ArticleDOI
Rotational abrasive flow finishing (R-AFF) process and its effects on finished surface topography
TLDR
In this article, rotational abrasive flow finishing (R-AFF) is used to finish complex internal and external geometries with the help of viscoelastic abrasive medium, while keeping in mind its low finish and material removal rates.Abstract:
The present study focus on abrasive flow finishing (AFF), a process that finishes complex internal and external geometries with the help of viscoelastic abrasive medium, while keeping in mind its low finish and material removal rates (MRR). Researchers have often strived to improve finishing rate and MRR. As an attempt to overcome the said limitations, this paper discusses rotational abrasive flow finishing (R-AFF) process wherein complete tooling is externally rotated and the medium reciprocates with the help of hydraulic actuators. In this study, preliminary experiments are conducted on Al alloy and Al alloy/SiC metal matrix composites (MMCs) at different extrusion pressures, and medium compositions are employed for finding optimum conditions of the same for higher change in roughness (ΔRa). The same optimum conditions are used to study the effect of workpiece rotational speed on (ΔRa), material removal (MR), change in workpiece hardness and surface topology. It is noted that as the workpiece rotational speed increases from 2 to 10 RPM, the experimental helix angle decreases from 22° to 9° and the helical path length increases from 67 to 160 mm. Based on these findings the mechanism of material removal of matrix and reinforcement in MMC using R-AFF have been proposed. Here the matrix material is removed by micro-cutting and three methods of material removal mechanisms for reinforcement are also explained. The scientific logic behind finishing mechanism of matrix and reinforcement, cross hatch patterns, helical path directions, micro-scratch (μ-scratch) width and depth variation with size, orientation and support that active abrasive grain obtains from neighboring abrasives is derived from scanning electron microscopy micrographs. Finally this study establishes that R-AFF can produce 44% better ΔRa and 81.8% more MR compared to the AFF process. Accordingly, R-AFF generates micro cross hatch pattern on the finished surface that can improve lubricant holding capabilities.read more
Citations
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Journal ArticleDOI
Nano-finishing techniques: a review
TL;DR: The quality of surface is one of the significant parameters which affects the life and functionality of any product as mentioned in this paper and many products require nano-level surface finish as their functional indispensabi...
Journal ArticleDOI
Recent developments in abrasive flow finishing process: A review of current research and future prospects:
TL;DR: Abrasive flow finishing processes are advanced finishing techniques widely used as finishing solutions in high-end industries like aerospace, automobile, tool and die, and prosthetic as discussed by the authors, where abrasive flow is used as a finishing solution.
Journal ArticleDOI
Machining the Integral Impeller and Blisk of Aero-Engines: A Review of Surface Finishing and Strengthening Technologies
TL;DR: A comprehensive literature review of studies on finishing and strengthening technologies for the integral impeller and blisk of aero-engines is presented in this article, where the authors discuss advanced rotational abrasive flow machining with back-pressure used for finishing the integral impreter.
Journal ArticleDOI
Blade surface uniformity of blisk finished by abrasive flow machining
TL;DR: In this paper, the abrasive flow machining (AFM) process is adopted to polish blade surfaces of blisk with the aim to acquire qualified uniform surface finish, by virtue of AFM's excellent machining flexibility for parts with structures difficult to machine.
Journal ArticleDOI
Research trends in abrasive flow machining: A systematic review
TL;DR: In this article, a systematic methodology has been used for a data-supported review of abrasive flow machining (AFM) applications in aerospace, automotive, and biomedical industries.
References
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Book
Science and Technology of Rubber
TL;DR: Gent et al. as mentioned in this paper described the molecular basis of rubber-like elasticity and showed that the strength of elastomers can be improved by reinforcement of Elastomers by Particulate Fillers.
Journal ArticleDOI
Modeling of material removal and surface roughness in abrasive flow machining process
TL;DR: In this paper, a finite element model is developed for the flow of media during abrasive flow machining (AFM) and the same is used to evaluate the stresses and forces developed during the process.
Journal ArticleDOI
Modeling and simulation of magnetic abrasive finishing process
TL;DR: In this article, a finite element model of the MAF process is developed to evaluate the distribution of magnetic forces on the workpiece surface and a theoretical model for material removal and surface roughness is also proposed accounting for microcutting.
Journal ArticleDOI
A study of the effects of abrasive-flow finishing on various machined surfaces
TL;DR: Abrasive-Flow Machining (AFM) is being used to deburr, polish, radius, remove recast layers, or produce compressive residual stresses in a wide range of applications.
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