Drilling of composite laminates with solid and hollow drill point geometries

Rakesh, Pawan Kumar; Singh, Inderdeep; Kumar, Deepak

doi:10.1177/0021998312436997

Cited by 33 publications

(15 citation statements)

References 28 publications

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“…Similar trends were shown by other authors. 13,14 Figures 16 and 17, respectively, show the torque variation with the operating parameters for the twist, Jo, and parabolic drills. As depicted in Figure 16, the torque decreases for twist and Jo drill and increases for parabolic drill with the increase of cutting speed (keeping the feed rate constant at 0.12 mm/rev).…”

Section: Drilling Thrust Force and Torque Signal Analysismentioning

confidence: 99%

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A study about hole making in woven jute fabric-reinforced polymer composites

Yallew

Kumar

Singh

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

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The time has come for natural fibres to stand as potent substitutes for synthetic fibres in various industrial applications. Recently, jute fibre is being used as reinforcement material in the development of reinforced plastics for various engineering products. The production cycle of a composite product often necessitates certain degree of machining operations. Drilling is one of the most widely practised machining operation for making holes in composite laminates. Hole making is imperative to ascertain the assembly of intricate composite products. The literature available indicate that not much research work has been reported on the machining behaviour of jute fibre-reinforced polypropylene composites. Hence, in the present experimental endeavour, drilling of woven jute fabric-reinforced polypropylene composite has been performed. The effect of operating variables on thrust force and torque signals was investigated. Drilling-induced damage in the developed composite was quantified using stereo microscope. The experimental values indicate close relationship between the tool geometries and the delamination factor. SEM analysis was also conducted to understand the drilling behaviour and surface morphology of the drilled holes. Among the solid drills compared, parabolic drill reveals better cutting behaviour in terms of lower drilling forces and better quality of holes. This may be attributed to the better tool-work piece interaction in case of parabolic drill point geometry.

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Section: Drilling Thrust Force and Torque Signal Analysismentioning

confidence: 99%

“…Earlier studies have also investigated the variation of torque during drilling of composite laminates using different drilling tools. 13,14 Delamination and analysis of delamination factor…”

Section: Drilling Thrust Force and Torque Signal Analysismentioning

confidence: 99%

A study about hole making in woven jute fabric-reinforced polymer composites

Yallew

Kumar

Singh

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…A research investigated the influence of hollow drills on the machinability and reported that the trepanning tool and U-shaped drill reduces the thrust force induced during drilling and consequently drops the damage developed. 75 Peck drilling is another method of drilling to stop the chip building up during hole making. A study on the peck drilling reported that peck drilling improves the surface finish as compared to that of the conventional drilling and provides adequate temperature control with easy chip removal.…”

Section: Machinability Enhancement Methodsmentioning

confidence: 99%

A review on the machining of fiber-reinforced polymeric laminates

Vinayagamoorthy

2017

Journal of Reinforced Plastics and Composites

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Machining is an inevitable task after processing a material. Among the different materials, fiber-reinforced plastics are used as structural materials in different industries. Compared to conventional materials, fiber-reinforced plastics are less hard by its nature. Due to this reason, the cutting force required during machining a plastic material is lesser than that of other materials. Although the cutting force is less, the influence of other machining parameters on the ease of machining is to be investigated in order to reduce the machining time and cost. Hence, a review on the machining associated successes and failures will be helpful for the manufacturing sectors and researchers in line with the machinability. This review provides a detailed picture of various issues dealt during machining a plastic material. The influences of manufacturing methods on the machinability and machinability measurement methods are comprehensively addressed. In addition, this review also discusses about the influences of machining parameters and optimum conditions for machining. The review also addresses various statistical methods used, machinability enhancement methods adopted, and unconventional methods used in the various researches.

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“…Therefore, the cutting mechanism of the hollow trepanning tool facilitated the reduction in the thrust force and subsequently led to the minimization of the drilling-induced damage. Rakesh et al 14 experimentally investigated the effect of drill point geometry (solid and hollow) on the drilling forces and the drilling-induced damage in glass fiber-reinforced epoxy composite laminates. It was found that the hollow drill point geometries were superior to solid one and the cutting mechanism of hollow drills was especially suitable for drilling in glass fiberreinforced plastics laminates.…”

Section: Analysis Of Drilling Forcesmentioning

confidence: 99%

Drilling behavior of sisal fiber-reinforced polypropylene composite laminates

Bajpai

Singh

2013

Journal of Reinforced Plastics and Composites

105

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Recently, natural fiber-reinforced composites are becoming a viable alternative to synthetic fiber composites in many applications. Secondary processing in terms of hole making in composites is an almost unavoidable operation for facilitating the assembly operations. In the present experimental investigation, the drilling process of natural fiberreinforced thermoplastic bio-composites has been evaluated in terms of the drilling forces. The cutting speed, feed rate and the drill point geometry have been taken as the input process parameters. Two types of drill geometries (solid and hollow in shape) have been used for drilling in the present work. The cutting mechanism of solid and hollow drill point geometry are substantially different which consequently affects the drilling forces and drilling-induced damage.

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Drilling of composite laminates with solid and hollow drill point geometries

Cited by 33 publications

References 28 publications

A study about hole making in woven jute fabric-reinforced polymer composites

A study about hole making in woven jute fabric-reinforced polymer composites

A review on the machining of fiber-reinforced polymeric laminates

Drilling behavior of sisal fiber-reinforced polypropylene composite laminates

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