Drilling of pultruded and liquid composite moulded glass/epoxy thick composites: Experimental and statistical investigation

Ramesh, B.; Elayaperumal, A.; Satishkumar, S.; Kumar, Anish

doi:10.1016/j.measurement.2017.09.026

Cited by 21 publications

(12 citation statements)

References 47 publications

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“…For instance, more than half of the structural weight of Airbus 350 is formed with composite laminates and too much drilling operations are examined in fabricating of structural components in airplane [9,10]. Therefore, drilling operations are commonly used in CFRP laminates which present heterogenic characteristic, brittle behavior and anisotropic structure having poor machinability owing to these properties [11][12][13]. It requires more attention for each machining process when considering the machinability of composite materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on novel drilling strategy of CFRP laminates using variable feed rate

Yaşar

Günay

2019

J Braz. Soc. Mech. Sci. Eng.

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This study focused on the influences of drilling parameters on hole quality and thrust force in drilling of carbon fiberreinforced polymer (CFRP) composite laminates via variable feed rate. Drilling experiments were carried out by using three different cutting speeds, feed rates and the qualities of tungsten carbide drill. Scanning electron microscopy and coordinate measurement machine were used for hole surface damage and diameter analyses, and also a portable instrument and 3D optical profilometer were utilized for surface roughness measurement. It was identified that thrust force (F z), delamination factor (F d) and average surface roughness (R a) values attained in drilling processes by variable feed rate are lower than those of constant feed rate with average of 14%, 3% and 18%, respectively. Besides, the hole diameter (D) values obtained with variable feed rate in hole exit were higher than those of constant feed rate. Moreover, the higher F z values were obtained with diamond-coated and TiAlN-coated drills than those of uncoated drill with 55% and 77%, respectively. The interactive influences of drilling parameters on machinability factors were evaluated via analysis of variance, and then, the most significant parameter was specified as the feed rate for F d , just as the drill quality for F z , R a and D. According to the experimental and statistical results, we suggested that the novel drilling strategy is a significant alternative for the step hole and conventional drilling of CFRP laminates.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on novel drilling strategy of CFRP laminates using variable feed rate

Yaşar

Günay

2019

J Braz. Soc. Mech. Sci. Eng.

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“…As mentioned earlier, the core objective of the research is to determine the optimal set of drilling parameters for the [20].…”

Section: Methodsmentioning

confidence: 99%

Experimental Investigation of Cutting Parameters Effects on the Surface Roughness and Tools Wear during the Drilling of Fiber Reinforced Composite Materials

2019

Mehran Univ. res. j. eng. technol.

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Optimization of the drilling parameters of the composite material is the key objective of this research, enhancing the surface roughness and minimizing the tool wear. In contrary to the other research, optimizing the machining parameters for a specific composite material for the mass productions, machining parameters are optimized for GFRP (Glass Fiber Reinforced Polymer), CFRP (Carbon Fiber Reinforced Polymer) and KFRP (Kevlar Fiber Reinforced Polymer) for the job shop production. In this research, the machining parameters are optimized for the enhanced surface roughness and minimum tool wear by varying the three types of composite material and three levels of the cutting speed. Nine experiments were performed, which were repeated twice in random manner to eliminate the biasness of the results. In these experiments, PVD (Physical Vapor Deposition) coated carbide inserts are used with the same geometry. Seventeen holes were machined in a single experiment, which surface roughness is measured by cutting the composite plate from middle of the hole and using the Countermatic surface roughness meter at different locations. Average surface roughness is determining for each set of varying parameters and plotted to observe the set of parameters for the minimum surface roughness. It has been observed that the minimum surface roughness are observed at; 1500 rpm in GFRP, 2000 rpm in CFRP and at 2500 rpm in KFRP. Finally, the wear patterns are also observed on the drill inserts using SEM (Scanning Electron Microscope) and it has been found that no prominent wear has been observed in the drill inserts, whereas, prominent depletion of coating are found at the higher cutting speed.

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“…Titanium-titanium boride (Ti-TiB) composites are processed through three different types of powder metallurgical techniques, namely spark plasma sintering (SPS) (processed at International Research Centre for Advanced Newer Materials-ARCI, Hyderabad, India), hot isostatic pressing (HIP) (processed at Defence Materials Research Laboratory-DMRL, Hyderabad, India) and vacuum sintering (VS) (processed at Non-Ferrous Technology Development Centre-NFTDC, Hyderabad, India). The details of all these techniques were discussed in our previous work [4,5].…”

Section: Processing Of Materialsmentioning

confidence: 99%

“…During the last decade, titanium and its alloys are well established for its applications in aerospace, chemical, marine and biomedical fields due to its low density, high specific strength, good fatigue and corrosion resistance [1][2][3][4][5][6][7][8][9][10]. Drilling difficult-to-machine materials present significant challenges to existing techniques.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and analysis of drilling parameters of metal matrix (Ti/TiB) composites

Ramkumar¹,

Selvakumar²,

Mohanraj

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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The present study focuses on the drilling processes and its parameters of titanium-titanium boride composites which are optimized using Taguchi technique. The titanium-titanium boride composites aiming 20% and 40% of titanium boride (by volume) is processed through three different powder metallurgical techniques such as, spark plasma sintering, hot isostatic pressing and vacuum sintering, respectively. It is processed through the drilled holes in the composites of 1 mm thickness using a solid carbide drill of 2 mm diameter. The effects of process parameters such as, feed rate, spindle speed and processing techniques on the drilling thrust force and surface roughness are analyzed. The results reveal that the feed rate and processing techniques are the most significant parameters influencing the thrust force and surface roughness. High thrust force and surface roughness are observed for the composites with 40% of titanium boride (by volume) processed through the spark plasma sintering technique. Further, the wear mode of drill edges, workpiece damage and chip morphology are also examined.

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Drilling of pultruded and liquid composite moulded glass/epoxy thick composites: Experimental and statistical investigation

Cited by 21 publications

References 47 publications

Experimental investigation on novel drilling strategy of CFRP laminates using variable feed rate

Experimental investigation on novel drilling strategy of CFRP laminates using variable feed rate

Experimental Investigation of Cutting Parameters Effects on the Surface Roughness and Tools Wear during the Drilling of Fiber Reinforced Composite Materials

Experimental investigation and analysis of drilling parameters of metal matrix (Ti/TiB) composites

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