Roundness Error Study in Deep Hole Drilling of Cold Mold Steel 718

Mohamad, Azizah; Zain, Azlan Mohd; Ahmad, Nor Bahiah; Yusof, Noordin Mohd; Najarian, Farhad

doi:10.17485/ijst/2017/v10i13/112973

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…[10] D. Depth of Cut: It is the thickness of the layer being removed (in a single pass) from the work piece or the distance from the uncut surface of the work to the cut surface, expressed in mm [7,8].…”

Section: A Selection Of Control Parametersmentioning

confidence: 99%

Taguchi Based Grey Relational Analyses for Multi Response Optimization of Control Parameters in CNC Turning of Aluminium 7075 Alloy

Saini¹,

Panchal²

2017

IJERT

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-High speed turning has emerged as a key manufacturing technology in machining of different metals and alloys. Turning at high speed is performed on the order of five to ten times the conventional cutting speed. It is advantageous in many ways like reduction in cutting forces and temperature, low power consumption, improvement in surface finish, high MRR, better dimensional accuracy and better part quality [1, 2]. In order to achieve the quality output, it is necessary to optimize the process parameters (like speed, feed, depth of cut, nose radius) during the high speed machining of alloy. To achieve this goal, the current research work is aimed at optimizing the input parameters of CNC turning. The study applies Taguchi's design of experiment methodology and grey relational analysis to optimize the process parameters in turning aluminum alloy AA7075-T6 material, a high strength aluminum alloy used for aerospace application using coated carbide insert under dry environment condition and having four type insert nose radius such as 0.2, 0.4, 0.8, 1.2 mm. Experiment have been carried out based on L16 standard orthogonal array design with four process parameters namely cutting speed, feed rate , Depth of cut and nose radius for surface roughness and Material removal rate[3, 4].The data was analyzed using Grey Relational Analysis (GRA) coupled with Principal Component Analysis (PCA). Analysis of S/N ratio was done to obtain the optimum combination of input parameters. The Grey Relational Grade (GRG) at optimum setting of the input parameters was obtained by Regression analysis. The experimental results were validated by comparing the experimental value of GRG with that of the predicted value and the comparison shows a good relationship between them.

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Section: A Selection Of Control Parametersmentioning

confidence: 99%

Taguchi Based Grey Relational Analyses for Multi Response Optimization of Control Parameters in CNC Turning of Aluminium 7075 Alloy

Saini¹,

Panchal²

2017

IJERT

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“…At present, these methods mainly include drilling, reaming, and boring [5][6][7]. Both gun and twist drilling can be used for the roughing process of deep-hole machining [8,9]; moreover, reaming and boring can be used for semi-finishing of the machined inner surface [10]. Among these methods, the boring process offers a number of advantages including greater flexibility, excellent applicability, low costs, and allows for automated rectification of the hole axis; therefore, deep-hole boring is widely used [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of tool wear in pull boring of pure niobium tubes

Han

Liu

Wang

2019

J Braz. Soc. Mech. Sci. Eng.

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To improve the surface quality of pure niobium tubes, pull boring can be utilized. However, this type of machining process can result in serious tool wear, tough chips, and poor surface quality. In this study, the cutting tool structure and boring process parameters used to machine pure niobium tubes via the pull boring process were investigated and tool wear was analyzed. The results suggest that unsuitable geometric cutting tool parameters as well as unfavorable boring process parameters can lead to severe wear of the cutter teeth. By adjusting the cutter teeth angle and process parameters, wear of the cutter teeth was significantly reduced and surface roughness of pure niobium tubes was found to be 3.2 μm, which satisfies the surface finish requirements.

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