Electrical discharge machining of carbon fibre composite materials

Lau, W.S.; Wang, M.; Lee, Wing Bun

doi:10.1016/0890-6955(90)90138-9

Cited by 87 publications

(46 citation statements)

References 3 publications

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“…At high currents, high temperatures are produced which cause severe melting of the composite surface, thermal expansion of the graphite fibers in the lateral direction and debonding between fibers and the matrix. The effect of polarity was investigated, and positive tool electrodes were shown to yield higher material removal rate (MRR) and lower tool wear [69]. Two important process variables in EDM are the discharge current and frequency of discharges.…”

Section: Electrical Discharge Machiningmentioning

confidence: 99%

“…Electrical discharge machining (EDM) can also be used for graphite-epoxy laminates since the graphite fibers are electrically conductive [69]. The voltage of 100 V and peak discharge current of 0.5-5 A were used in die sinking method with the workpiece immersed in a dielectric fluid.…”

Section: Electrical Discharge Machiningmentioning

confidence: 99%

“…laserbeam drilling [61][62][63][64], water-jet drilling (with or without abrasives) [65,66], ultrasonic drilling [67,68] and electrical discharge machining (EDM) [69][70][71][72] have been reported. A review of traditional and non-traditional methods applied to organic and metal matrix composites machining can be found [73].…”

Section: Introductionmentioning

confidence: 99%

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The path towards delamination-free drilling of composite materials

Hocheng¹,

Tsao²

2005

Journal of Materials Processing Technology

384

187

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Section: Electrical Discharge Machiningmentioning

confidence: 99%

Section: Electrical Discharge Machiningmentioning

confidence: 99%

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The path towards delamination-free drilling of composite materials

Hocheng¹,

Tsao²

2005

Journal of Materials Processing Technology

384

187

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“…Several non-traditional machining processes, i.e. laser-beam drilling [13][14][15], water-jet drilling (with or without abrasives) [16][17][18], ultrasonic drilling [19,20], electrical discharge machining (EDM) [21], have been reported as alternatives. Nevertheless, conventional drilling continues to be widely used for practical purpose.…”

Section: Introductionmentioning

confidence: 99%

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Tsao

Hocheng

2003

International Journal of Machine Tools and Manufacture

169

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Drilling-induced delamination often occurs both at the entrance and the exit of the workpiece during drilling of composite material. Investigators have studied analytically and experimentally that delamination in drilling can be correlated to the thrust force of the drill. With a pre-drilled pilot hole, the delamination can be reduced significantly. Early reference reported models of drilling-induced delamination, however, the effect of chisel edge length and pilot hole diameter on delamination is rarely discussed. The optimal range of chisel edge length with respect to drill diameter is derived in this paper. 

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“…Many researchers have established that carbon-carbon composites can be machined easily using non-traditional machining methods, especially EDM machining [5][6][7][8][9][10]. But detailed mathematical models representing the influence of predominant machining variables on machinability parameters are yet to be established.…”

Section: Introductionmentioning

confidence: 99%