Optimization of Drilling Process Parameters for Minimizing Surface Roughness in Carbon-Carbon Composite Materials

2014 ◽  
Vol 1077 ◽  
pp. 96-105 ◽  
Author(s):  
K.V. Krishna Sastry ◽  
V. Seshagirirao
Keyword(s):  
Surface Roughness ◽  
Composite Materials ◽  
Process Parameters ◽  
Surface Finish ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Drilling Process ◽  
Drill Bit ◽  
Carbon Composite Materials ◽  
Coated Carbide

The Carbon-Carbon composites are nothing but the composites, in which Carbon Fibres are reinforced into a Carbon Matrix. The usage of Carbon-Carbon composite materials is gaining the significant position in the fabrication of Missiles, Space Shuttles and other advanced structures. These materials are primarily expensive in nature, and the drilling cost of these materials will increase the manufacturing cost of the final product. Hence care should be taken in drilling of these materials. The cutting process parameters should be chosen carefully to minimize the damage and improve the quality of the hole drilled. Surface roughness is the most serious problem in the drilling process of Carbon-Carbon composites. This paper discusses the comprehensive analysis of surface finish and the influence of various process parameters as spindle speed, feed rate and drill bit point angle on the surface finish of the drilled holes. These experiments were carried out on a CNC drilling machine at Anna university campus, Chennai, India. The drilling of Carbon-Carbon composite material has been done by using three different drill bit materials i.e. TiN coated carbide, Solid carbide and High Speed Steel tools with three different point angles. The Analysis of variance technique is used to study the significance of each process parameter on the performance characteristic surface roughness. A L27orthogonal array is employed to study the influence of process parameters. This paper also presents the comparison of the surface roughness values of drilled holes obtained by using the three different tool materials.

Experimental Analysis of Hole Ovality in Drilling of Carbon-Carbon Composites

2014 ◽  
Vol 592-594 ◽  
pp. 294-301 ◽  
Author(s):  
K.V. Krishna Sastry ◽  
V. Seshagiri Rao ◽  
M.S. Kumar ◽  
A. Velayudham
Keyword(s):  
Process Parameters ◽  
Coordinate Measuring Machine ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Influence Of Process Parameters ◽  
Carbon Composite Material ◽  
Density Values ◽  
Measuring Machine ◽  
Coated Carbide

The Carbon-Carbon (C-C) composite materials are logical candidates for the manufacture of space crafts and other advanced structures, due to their low density values. These materials are naturally expensive, and the machining cost increases the final product’s price. The literature availability on the machining, particularly with reference to drilling operation of these materials is very rare. Hence an experimental investigation has taken to study the hole quality of this ubiquitous carbon-carbon composite material. This paper presents a comprehensive analysis about the influence of process parameters on the ovality of the carbon-Carbon composite plate, which is measured with a coordinate measuring machine. The drilling experiments were carried with two different tools like HSS and TiN coated Carbide materials on a CNC drilling machine. The Point Angle, spindle speed and feed rate were chosen as process parameters, and their impact on the quality of drilled hole was analyzed with the help of Taguchi’s orthogonal array and ANOVA-TM software. A comparison was done between the performances of drilling by these two different tools.

Sol-Gel Coatings on Carbon/Carbon Composites.

1986 ◽  
Vol 73 ◽  
Author(s):  
S. M. Sim ◽  
R. H. Krabill ◽  
W. J. Dalzell ◽  
P-Y. Chu ◽  
D. E. Clark
Keyword(s):  
Composite Materials ◽  
Composite Coatings ◽  
Sol Gel ◽  
Structural Materials ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Carbon Substrates ◽  
Severe Environments ◽  
Carbon Composite Materials

ABSTRACTThe need for structural materials that can withstand severe environments up to 4000°F has promulgated the investigation of sol-gel derived ceramic and composite coatings on carbon/carbon composite materials. Alumina and zirconia sols have been deposited via thermophoresis on carbon/carbon substrates.

scholarly journals Analysis and optimization of laser drilling process during machining of AISI 303 material using grey relational analysis approach

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
V. Chengal Reddy ◽  
Thota Keerthi ◽  
T. Nishkala ◽  
G. Maruthi Prasad Yadav
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Grey Relational Analysis ◽  
Pulse Frequency ◽  
Laser Drilling ◽  
Simultaneous Optimization ◽  
Fibre Laser ◽  
Drilling Process ◽  
Relational Analysis ◽  
Grey Relational

AbstractSurface roughness and heat-affected zone (HAZ) are the important features which influence the performance of the laser-drilled products. Understanding the influence of laser process parameters on these responses and identifying the cutting conditions for simultaneous optimization of these responses are a primary requirement in order to improve the laser drilling performance. Nevertheless, no such contribution has been made in the literature during laser drilling of AISI 303 material. The aim of the present work is to optimize the surface roughness (Ra) and HAZ in fibre laser drilling of AISI 303 material using Taguchi-based grey relational analysis (GRA). From the GRA methodology, the recommended optimum combination of process parameters is flushing pressure at 30 Pa, laser power at 2000 W and pulse frequency at 1500 Hz for simultaneous optimization of Ra and HAZ, respectively. From analysis of variance, the pulse frequency is identified as the most influenced process parameters on laser drilling process performance.

Machinability study and optimization of CNC drilling process parameters for HSLA steel with coated and uncoated drill bit

2021 ◽  
Author(s):  
Nitin P. Sherje ◽  
Sameer A. Agrawal ◽  
Ashish M. Umbarkar ◽  
Prashant P. Kharche ◽  
Dharmesh Dhabliya
Keyword(s):  
Process Parameters ◽  
Hsla Steel ◽  
Drilling Process ◽  
Drill Bit

scholarly journals Optimization of Drilling Process Parameters Via Taguchi, TOPSIS and RSA Techniques

2017 ◽  
Vol 62 (3) ◽  
pp. 1803-1812 ◽  
Author(s):  
K. Shunmugesh ◽  
K. Panneerselvam
Keyword(s):  
Process Parameters ◽  
Feed Rate ◽  
Research Work ◽  
Cutting Speed ◽  
High Strength ◽  
Drilling Process ◽  
Drill Bit ◽  
Influence Of Process Parameters ◽  
Light Trucks ◽  
Cfrp Composite

AbstractCarbon Fiber Reinforced Polymer (CFRP) is the most preferred composite material due to its high strength, high modulus, corrosion resistance and rigidity and which has wide applications in aerospace engineering, automobile sector, sports instrumentation, light trucks, airframes. This paper is an attempt to carry out drilling experiments as per Taguchi’s L27(313) orthogonal array on CFRP under dry condition with three different drill bit type (HSS, TiAlN and TiN). In this research work Response Surface Analysis (RSA) is used to correlate the effect of process parameters (cutting speed and feed rate) on thrust force, torque, vibration and surface roughness. This paper also focuses on determining the optimum combination of input process parameter and the drill bit type that produces quality holes in CFRP composite laminate using Multi-objective Taguchi technique and TOPSIS. The percentage of contribution, influence of process parameters and adequacy of the second order regression model is carried out by analysis of variance (ANOVA). The results of experimental investigation demonstrates that feed rate is the pre-dominate factor which affects the response variables.

Study on carbon epoxy composite surfaces machined by abrasive water jet machining

2018 ◽  
Vol 53 (20) ◽  
pp. 2909-2924 ◽  
Author(s):  
Ajit Dhanawade ◽  
Shailendra Kumar
Keyword(s):  
Surface Roughness ◽  
Composite Material ◽  
Process Parameters ◽  
Surface Finish ◽  
Epoxy Composite ◽  
Water Jet ◽  
Machining Parameters ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
Pull Out

Traditional machining of carbon epoxy composite material is difficult due to excessive tool wear, excessive stresses and heat generation, delamination, high surface waviness, etc. In the present paper, research work involved in the experimental study of abrasive water jet machining of carbon epoxy composite material is described. The aim of present work is to improve surface finish and studying defects in machined samples. Taguchi's orthogonal array approach is used to design experiments. Process parameters namely hydraulic pressure, traverse rate, stand-off distance and abrasive mass flow rate are considered for this study. Analysis of machined surfaces and kerf quality is carried out using scanning electron microscope to evaluate microscopic features. Further, the effect of machining parameters on surface roughness is investigated using analysis of variance approach. It is found that traverse rate and pressure are most significant parameters to control surface roughness. Optimization of process parameters is performed using grey relational analysis. Thereafter, confirmation tests are carried out to verify the improvement in the surface quality with optimum set of process parameters. It is found that surface finish of machined samples is improved by 10.75% with optimum levels of process parameters. Defects like delamination, fiber pull-out and abrasive embedment are also studied using SEM. It is observed that delamination and fiber pull-out are prominent in samples machined at low pressure and high traverse rate.

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