Investigation of Delamination at Exit of Drilled Carbon Fiber Reinforced Polymer (CFRP) Composite with Diamond Coated Ball Nose Drills

2015 ◽  
Vol 1115 ◽  
pp. 80-85
Author(s):  
Mohamed Konneh ◽  
Kassim A. Abdullah ◽  
Sudin Izman ◽  
Mohd Amirudin Jusoh
Keyword(s):  
Feed Rate ◽  
Rotational Speed ◽  
Cutting Parameters ◽  
Influential Factor ◽  
Fiber Reinforced Polymer ◽  
Machining Parameters ◽  
Reinforced Polymer ◽  
Delamination Factor ◽  
Cfrp Composite ◽  
The Relationship

: The investigation of the influence of machining parameters on delamination at exit of drilled holes after drilling into CFRP composite using 4 mm-diameter 2-fluted carbide drills coated diamond is present in this paper. The delamination at tool exit was analyzed in terms of delamination factor on the basis of analysis of variance (ANOVA) of Central Composite Design (CCD) of experiments. It is found that spindle speed is the most influential factor for the drilling of CFRP within the range of cutting parameters examined. The lowest delamination factor (1.003) was generated at rotational speed, 5063 rpm and feed rate, 180 mm/min; and the highest delamination factor (1.093) generated at rotational speed, 537 rpm and feed rate, 180 mm/min. A mathematical model has been predicted for the delamination at tool entry. The relationship between the machining variables and output variables is also established.

Evaluating Delamination at Entry of Drilled Carbon Fiber Reinforced Polymer (CFRP) Composite with Diamond Coated Ball Nose Drills

2015 ◽  
Vol 1115 ◽  
pp. 64-69
Author(s):  
Mohamed Konneh ◽  
Muataz Hazza Faizi Al Hazza ◽  
Atiah Abdullah Sidek ◽  
Ruhaki Huda Samsul Bahri
Keyword(s):  
Feed Rate ◽  
Rotational Speed ◽  
Cutting Parameters ◽  
Influential Factor ◽  
Fiber Reinforced Polymer ◽  
Machining Parameters ◽  
Reinforced Polymer ◽  
Delamination Factor ◽  
Cfrp Composite ◽  
The Relationship

This paper presents the investigation of the influence of machining parameters on delamination at entry of drilled holes after drilling into CFRP composite using 4 mm-diameter 2-fluted carbide drills coated diamond. The delamination at tool entry was analyzed in terms of delamination factor on the basis of analysis of variance (ANOVA) of Central Composite Design (CCD) of experiments. It is found that spindle speed is the most influential factor for the drilling of CFRP within the range of cutting parameters examined. The lowest delamination factor (1.006) was generated at rotational speed, 4400 rpm and feed rate, 270 mm/min; and the highest delamination factor (1.123) generated at rotational speed, 537 rpm and feed rate, 180 mm/min. A mathematical model has been predicted for the delamination at tool entry. The relationship between the machining variables and output variables is also established.

Influence of Machining Parameters on Temperature when Drilling Carbon Fiber Reinforced Polymer (CFRP) Using Coated Diamond Drills

2015 ◽  
Vol 1115 ◽  
pp. 74-79
Author(s):  
Mohamed Konneh ◽  
Mohammad Iqbal ◽  
Hanfi bin Ani ◽  
Mohd Zulhari bin Yayah
Keyword(s):  
Feed Rate ◽  
Rotational Speed ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Machining Parameters ◽  
End Mill ◽  
First Order ◽  
Reinforced Polymer ◽  
The Relationship ◽  
Central Composite

As the tendency towards weight reduction and low fuel consumption seems to drive the increased use of advanced exotic materials such as composites, titaniums and Inconels in the aerospace industry, the need for machining remains in aircraft industries as a post-processing operation. In the present work, the investigation of the influence of machining parameters on surface temperature when drilling CFRP using 4 mm-diameter 2-fluted carbide end-mill coated with diamond is presented. The temperature was examined on Thermal Gun Quicktemp 860-T1 sensor and analysed based on analysis of variance (ANOVA) of Central Composite Design of experiments and a first order mathematical model has been developed to predict temperature values for range of machining parameters used in the study. The relationship between the machining variables and output variables is established. It was found that the lowest temperature (32.2°C) was generated at rotational speed, 537 rpm and feed rate, 180 mm/min and at the highest temperature (39.1°C) generated at rotational speed, 4400 rpm and feed rate, 270 mm/min.

INVESTIGATION OF SURFACE MORPHOLOGY OF DRILLED CFRP PLATES AND OPTIMIZATION OF CUTTING PARAMETERS

2020 ◽  
Vol 27 (09) ◽  
pp. 1950209
Author(s):  
ÖMER ERKAN ◽  
GÖKHAN SUR ◽  
ENGIN NAS
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Design Method ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Feed Speed ◽  
Reinforced Polymer ◽  
Cfrp Composite ◽  
Optimization Of Cutting Parameters ◽  
Full Factorial

In this study, the carbon fiber reinforced polymer (CFRP) composite material was drilled using different parameters ([Formula: see text] and [Formula: see text] Point Angle, 30, 60 and [Formula: see text] cutting speed and 0.06, 0.08 and [Formula: see text] feed rate). Experimental parameters were designed according to full factorial design method and the results were analyzed using Taguchi L18 experimental design. The results of the study show that the lowest surface roughness values are 0.1958 and [Formula: see text]m with the cutting speed of 90 [Formula: see text] and feed rate of [Formula: see text] in the Point angles of [Formula: see text] and [Formula: see text], respectively. When the results of Anova analysis were evaluated, parameters (feed speed, cutting speed and end point angle) according to the effect ratios on surface roughness were formed at the rates of 41.06%, 33.13% and 5.07%, respectively. The most suitable parameters according to S/N ratios were determined using A2B3C1 factors for the average surface roughness.

Surface Roughness in Drilled Carbon Fiber Reinforced Polymer (CFRP) Composite Using Diamond Coated Ball-Nose Drills

2015 ◽  
Vol 1115 ◽  
pp. 90-95 ◽  
Author(s):  
Mohamed Konneh ◽  
Sudin Izman ◽  
Atiah Abdullah Sidek ◽  
Muhammad Salahuddin Salleh
Keyword(s):  
Surface Roughness ◽  
Carbon Fiber ◽  
Feed Rate ◽  
Rotational Speed ◽  
Machining Parameters ◽  
Fiber Reinforced ◽  
Cfrp Composite ◽  
Carbon Fiber Reinforced ◽  
Coated Carbide ◽  
Twist Drills

This paper discusses an experimental investigation into the influence of machining parameters on surface roughness when drilling CFRP using 4 mm-diameter 2-fluted carbide drills coated with diamond. The experimental plan employed in this study is based on Central Composite Design technique, established considering drilling with prefixed cutting parameters in a locally prepared Carbon Fiber-Reinforced Plastic (CFRP) composite material by hand lay-up technique using diamond coated carbide twist drills. A model using multiple regression analysis between rotational speed and feed rate with the surface roughness (Ra) of the fiber reinforced laminates has been predicted for the machining conditions investigated. It has been found that the lowest surface roughness Ra (0.910 μm) was generated at rotational speed, 5062 rpm and feed rate, 180 mm/min; and the highest surface roughness Ra (4.630 μm) generated at a rotational speed of 537 rpm and feed rate of 180 mm/min.

Parametric Optimization in Turning of CFRP (Epoxy) Composites: A Case Experimental Research with Exploration of HS Algorithm

2014 ◽  
Vol 619 ◽  
pp. 54-57 ◽  
Author(s):  
Kumar Abhishek ◽  
Saurav Datta ◽  
Suman Chatterjee ◽  
S.S. Mahapatra
Keyword(s):  
Genetic Algorithm ◽  
Experimental Research ◽  
Harmony Search ◽  
Fiber Reinforced Polymer ◽  
Epoxy Composites ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Performance Indices ◽  
Reinforced Polymer ◽  
Cfrp Composite

Carbon Fiber Reinforced Polymer (CFRP) composite materials find varied engineering applications especially in automotive, aircraft and locomotive industries. Hence, it has become essential to study machining and machinability aspects of these composites. This paper reports an application of harmony research (HS) algorithm through a case experimental research in order to obtain optimal parametric combination in turning of CFRP (epoxy) composites. Taguchi’s L9 orthogonal array has been used for experimentation. The performance indices such as surface roughness and cutting force have been chosen; and corresponding machining parameters that have been studied like spindle speed, feed rate and depth of cut. Optimal results have also been compared with genetic algorithm (GA); it has been revealed that harmony search method provided better result as compared to genetic algorithm.

Investigation and optimization of machining parameters in drilling of carbon fiber reinforced polymer (CFRP) composites

2017 ◽  
Vol 46 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Shunmugesh K. ◽  
Panneerselvam Kavan
Keyword(s):  
Surface Roughness ◽  
Cutting Speed ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Direction ◽  
Machining Parameters ◽  
Taguchi Technique ◽  
Content Type ◽  
Reinforced Polymer ◽  
Delamination Factor

Purpose This paper aims to attempt to use grey relational analysis (GRA) coupled with Taguchi technique for the optimization of machining parameters (cutting speed, feed rate and drill bit type) with multiple performance characteristics of delamination factor, surface roughness and circularity in drilling of carbon fiber-reinforced polymer (CFRP) along the fiber direction. Design/methodology/approach Machining trials involved drilling of 6-mm diameter holes on 8-mm-thick CFRP plates was performed according to L27 (313) Taguchi’s orthogonal array technique using the drill material of high speed steel (HSS), Titanium Nitride (TiN) and Titanium Aluminium Nitride (TiAlN). Analysis of variance has been used find the effect, percentage contribution and significance of the process parameters, namely, cutting speed, feed rate and drill bit type. Findings The Taguchi technique is combined with the GRA to find the optimum process parameter which minimizes the delamination factor, surface roughness and circularity within the range of parameters investigated. The effective implementation of the hybrid approach helps to produce quality and defect free holes. Originality/value Experimental investigation on delamination factor, surface roughness and circularity in drilling of CFRP along the fiber direction using Taguchi-GRA was seldom reported.

Defects Study on Drilling of Carbon Fiber Reinforced Polymer (CFRP) Laminates

2014 ◽  
Vol 800-801 ◽  
pp. 61-65 ◽  
Author(s):  
Kun Xian Qiu ◽  
Cheng Dong Wang ◽  
Qing Long An ◽  
Ming Chen
Keyword(s):  
Carbon Fiber ◽  
Feed Rate ◽  
High Speed ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Cfrp Laminates ◽  
Drilling Performance ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

The new developed carbon fiber reinforced polymer laminates are widely used in main structural components of big commercial aircrafts. Generally drilling is the final operations in manufacturing structure, which is the most important operation during assembly. Defects such as burrs and delamination always appear in the process of drilling, which makes it hard to control the drilling quality. In this research, the drilling defects of T800 CFRP laminates are evaluated by using a brad point drill and a multifacet drill in terms of drilling forces, burr defect and delamination detection. The results show that the spindle speed is the most significant factor affecting the delamination defect followed by the feed rate. High speed drilling and low feed rate could improve the surface quality and reduce the delamination. The multifacet drill showed excellent drilling performance than the brad point drill and generated smaller defects.

scholarly journals Investigate the Effect of Cutting Parameters on Surface Roughness When Milling X12m Steel

2021 ◽  
pp. 258-263
Author(s):  
Do Thi Kim Lien ◽  
Nguyen Dinh Man ◽  
Phung Tran Dinh
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Feed Rate ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Face Milling ◽  
Negligible Effect ◽  
Depth Of Cut ◽  
The Relationship

In this paper, an experimental study on the effect of cutting parameters on surface roughness was conducted when milling X12M steel. The cutting tool used in this study is a face milling cutter. The material that is used to make the insert is the hard alloy T15K6. The cutting parameters covered in this study include the cutting speed, the feed rate and depth of cut. The experiments are performed in the form of a rotating center composite design. The analysis shows that for both Ra and Rz: (1) the feed rate has the greatest influence on the surface roughness while the depth of cut, the cutting speed has a negligible effect on the surface roughness. (2) only the interaction between the feed rate and the depth of the cut has a significant effect on both Ra and Rz while the interaction between the cutting speed and the feed rate, the interaction between the cutting speed and the depth of cut have a negligible effect on surface roughness. A regression equation showing the relationship between Ra, Rz, and cutting parameters has also been built in this study.

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