Yazar "Gupta, Munish Kumar" seçeneğine göre listele

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    Influence of tool path strategies on machining time, tool wear, and surface roughness during milling of AISI X210Cr12 steel
    (Springer London Ltd, 2022) Uzun, Mahir; Usca, Usame Ali; Kuntoglu, Mustafa; Gupta, Munish Kumar
    In this study, the effect of four different machining methods consisting of Trochoidal, Follow Part, Zig, and Zig-Zag which are common in CAM package programs and used often in the industry has been investigated. Firstly, the 3D model of samples is produced in the CAD program. Models are machined in CNC milling workbench. In order to examine the effect of tool path strategies on tool life, the amount of wear loss as a criterion and the SEM images of tool wear as a supporting criterion are taken into account. According to the results, the Zig-Zag tool path strategy is the tool path that causes the highest weight loss in the cutting tool, while the Trochoidal tool path strategy causes in the least weight loss in the cutting tool. In addition, the surface roughness of the samples taken from different regions of the model and the operation time of the different tool paths are determined. In this context, the operation time of the test sample is maximum in Zig team path strategy, while it is at least in Follow part team path strategy. By examining the surface roughness, the best surface roughness values are obtained with the strategy of Follow Part and Trochoidal tool path, while the worst values are obtained in the Zig tool path strategy. As a result of the examination, the optimum tool path strategy for cutting tool life was found to be Trochoidal tool path. This work differs from the counterparts as handling the AISI X210Cr12 steel which make the paper first in determining the effect of tool path strategies on machinability. Lastly, obtained findings are useful for the organization of this type of steel in manufacturing chain of industrial companies.
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    Investigations on tool wear, surface roughness, cutting temperature, and chip formation in machining of Cu-B-CrC composites
    (Springer London Ltd, 2021) Usca, Usame Ali; Uzun, Mahir; Kuntoglu, Mustafa; Sap, Emine; Gupta, Munish Kumar
    Composites have excellent material properties such as lightness, rigidity, and strength with reinforcement of specialized materials to serve an extended field in engineering. Meanwhile, some restrictions due to the production process lead to poor machinability characteristics and show reduced surface quality, excessive cutting temperature, and tool wear. The principal aim in this study is to research the machinability characteristics of Cu matrix reinforced by B and ceramic CrC powders during dry turning operation. In addition to reinforcement ratio, cutting speed, feed rate, and depth of cut were taken into consideration according to Taguchi L-8 orthogonal array in the experimental plan. Seemingly, reinforcement ratio is the governing factor over turning parameters on flank wear, surface roughness, and cutting temperatures. For the secondary effect, cutting speed and feed rate have contributing impact on cutting temperatures and surface roughness, respectively. Lastly, reinforcement ratio has significant impact on chip formation since deformation mechanism in the material is changed with cutting initiation. Accordingly, new additives reveal unique structure which is intriguing and need to be discovered for measuring the machinability behavior of metal matrix composites.