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Mechanical Engineering - Faculty Publication

Name of the Staff: Francis. N. K

Journal Name: International journal of Materials and Manufacturing Process.

Tittle of the Paper:  Swirling abrasive fluidized bed machining: Effect of process parameters on machining performance

(Impact factor: 1.629,   Taylor and Francis Publishers)

Year of Publication: 2015

Abstract:

Swirling Abrasive Fluidized Bed Machining (SA-FBM) is a novel variant of Fluidized Bed Machining (FBM). This research focuses on the experiments performed on copper specimens using silicon carbide abrasive particles to investigate the influence of operating parameters such as grain size, superficial velocity, and machining time on metal removal rate, transformation of surface texture, and the surface finish. The study concludes that the surface modification is faster with SA-FBM compared with conventional FBM; the initial roughness conditions of the workpiece have no effect on the maximum possible surface finish; moreover, for faster metal removal, higher superficial velocity, and for better surface finish, fine abrasive grains are preferred.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Name of the Staff: Francis. N. K

Journal Name: International journal of Materials and Manufacturing Process.

Tittle of the Paper: 

SAFBM of Softer Materials: An Investigation into Micro-Cutting Mechanisms and the Evolution of Surface Roughness Profile.

(Impact factor: 1.629,   Taylor and Francis Publishers)

Year of Publication: 2015

Abstract:

Swirling Fluidized Bed Machining (SAFBM) is a nontraditional machining process and novel variant of Fluidized Bed Machining (FBM) in which the former has overcome certain drawbacks of the latter such as roughness variation and shading effect. SAFBM generates significant material removal and surface finish on the workpiece surface during the machining process with consistency and flexibility. 10 The present detailed study emphasizes on the machining of softer materials such as brass and aluminum using abrasive particles such as silicon carbide in order to analyze the effect of various micro-cutting mechanisms on the generation of surface texture. This study examines the evolution of surface roughness profile after progressive machining with abrasives ranging from coarse, medium and fine grades of SiC with the help of optical microscopic images of the machined surface. The research concludes that using SAFBM, flat and uniform surface finishing with modification ratio in terms of roughness parameters ranging from 5 to 7 is possible within 7–8 hours of processing.

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Name of the Staff: Francis. N. K

Journal Name: International journal of Applied Engineering Research

Tittle of the Paper: 

SAFBM of Softer Materials: An Investigation into Micro-Cutting Mechanisms and the Evolution of Surface Roughness Profile.

(Scopus indexed)

Year of Publication: 2015

Abstract:

Swirling Abrasive Fluidized Bed Machining (SAFBM) is a non-traditional method of abrasive flow machining as well as a novel variant of Fluidized Bed Machining (FBM) which is used to machine complex shape and size of work piece that are difficult to machine with conventional method. Owing to its ability to perform machining and generate polished surface from a roughness value of Ra 1.2µ to 0.2 µ within 8 hours of processing, this new method offers greater scope in the surface modification of rough machined surfaces with complex geometry such as component with ducts and grooves. The effects of various process parameters like machining time, abrasive grain size and particle impact speed have been investigated to reveal their impact on metal removal rate using Taguchi methodology on brass specimen. The experimental layout was designed based on the Taguchi?s L9 (34 ) Orthogonal array technique and analysis of variance (ANOVA) was performed to identify the effect of the cutting parameters on the response variables. The optimum set of process parameters has also been predicted to maximize the MRR

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Name of the Staff: Francis. N. K

Journal Name: IJARTET

Tittle of the Paper: 

Investigating the effect of material properties on machining performance in swirling fluidized bed machining

Year of Publication: 2015

Abstract:

Swirling Fluidized Bed Machining (SFBM) is a novel variant of Fluidized Bed Machining (FBM) in which the former has overcome certain drawbacks of the latter, such as machining variation across the due to the preferential abrasive action at the bottom portion just above the porous distributer and the shading effect due to the work piece geometry. This research focuses on the experiments performed on the specimens of soft and aluminum using silicon carbide abrasive particles with the aim of investigating the influence of material hardness on surface finish and metal removal. Further investigation on the feasibility of industrial application as well as analysis was also carried out.

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Name of the Staff: Francis. N. K

Journal Name: Applied Mechanics and Materials

Tittle of the Paper: 

Swirling Fluidized Bed Polishing: A New Non-Conventional Method of Surface Modification

Year of Publication: 2015

Abstract:

Swirling Fluidized Bed Polishing (SFBP) is a non–traditional alternative abrasive flow surface finishing form of Fluidized Bed Machining (FBM) in which the former has special features to overcome certain significant limitations of the latter, namely the variation of the surface roughness vertically along the component surface and the screening effect owing to the complex contours across the work piece geometry. Owing to its ability to perform machining and generate finely polished surface from a roughness value of Ra 1.2µ to 0.2 µ within 8 hours of processing, this new method offers greater scope for surface modification of rough machined surfaces with ducts and grooves. This research focus on investigating the effect of abrasive particle concentration on metal removal rate per unit area of the specimen surface. 3D surface morphology analysis investigates the quality of the polished surface and the study of circumferential uniformity and the analysis of machining accuracy of a complex-contoured component further examine its scope and relevance in industrial applications.

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