CNC electrical discharge rough machining of turbine blades

Ding, Songlin; YuanZ, R; Li, Z; Wang, K

doi:10.1243/09544054jem161

Cited by 27 publications

(14 citation statements)

References 16 publications

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“…It is concluded that they have the same flushing-hole number determined in equation (4). It is also concluded that the only difference among them is their different hole diameters on the baseline determined in equation (5). Compared to the diameters in E1, the diameters in E2 on the inner ring are increased in order to decrease the EAR and increase the flushing effects on the central area.…”

Section: Principle Of Flushing-hole Distributionmentioning

confidence: 86%

“…Finally, the principle of flushing-hole distribution should check out the flushing-hole design by solving the total number n j in equation (4), the diameter d j and the maximum ring number k in equation (5). The solution values are substituted in equation (1) to calculate the EAR(c), which should be an optimum solution to the distributing principle.…”

Section: Principle Of Flushing-hole Distributionmentioning

confidence: 99%

“…1 Munz et al 2 found that strengthening flushing velocity in the gap could achieve a high material removal rate (MRR) with an appropriate electrical energy. Therefore, many approaches had been proposed to improve the flushing conditions in the gap to improve the EDM performance, 3,4 such as EDM milling with rotary cylindrical tool, 5 jet flushing 6 and high-speed tool jump. 7 Moreover, it seemed that forming holes in tool electrode was a more useful method to enable fluid flush into the discharge gap, such as a mono-hole or a multi-hole electrode.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of flushing holes on the machining performance of blasting erosion arc machining

Zhao

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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Blasting erosion arc machining is a novel electrical erosion process depending on the hydrodynamic arc-breaking mechanism to achieve a reliable high-efficiency machining. In blasting erosion arc machining, the high-velocity fluid field in the discharging gap is the precondition of the mechanism to control arc plasma to efficiently remove workpiece material. Therefore, this study mainly investigates the influence of flushing holes on the fluid field distribution directly and on the machining performance indirectly. Three multi-hole solid electrodes with different types of flushing holes are designed out according to the distributing principle. The influence of their flushing holes on the fluid field is conducted by a comparison fluid simulation which demonstrates that the electrode with flushing-hole diameters decreasing gradually from the inner to the outer in the radial direction attains the best flushing velocity distribution on the workpiece surface. Furthermore, the influence of their flushing holes on the blasting erosion arc machining performance is investigated by a comparison machining experiment in order to verify the comparison results of fluid field simulation. The experimental results illustrate that these electrodes have very different machining performance when machining nickel-based high-temperature alloy GH4169 (similar to Inconel 718) under the conditions of same discharge peak current and flushing inlet pressure. The electrode with the best flushing velocity distribution rather than with the highest velocity at a particular point achieves the best machining performance of the highest material removal rate, the least relative tool wear ratio and the least surface roughness (Ra), indicating an optimized design of flushing holes in the multi-hole solid electrode.

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Section: Principle Of Flushing-hole Distributionmentioning

confidence: 86%

Section: Principle Of Flushing-hole Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of flushing holes on the machining performance of blasting erosion arc machining

Zhao

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…In 1980s with introduction of computer numerical control (CNC) and four servo-controlled axes [5] in mEDM machine tool, a new machining strategy called mED-milling has evolved [6,7].…”

Section: Introductionmentioning

confidence: 99%

Micro electric discharge milling process performance: An experimental investigation

Karthikeyan

Ramkumar

Dhamodaran

et al. 2010

International Journal of Machine Tools and Manufacture

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“…This was eventually advanced further by Bayramoglu and Duffill to include cylindrical [4] and plate [5] tools. At the present time, ram EDM machine tools have evolved [6] to include four servocontrolled axes to realize electrical discharge milling (ED-milling), wherein a complex three-dimensional workpiece is machined layer-by-layer, by traversing a rotating solid cylindrical or tubular tool along a predefined tool path, resembling an end-milling operation.…”

Section: Introductionmentioning

confidence: 99%

Electrical discharge milling with oblong tools

Mikesic

Koshy

2009

International Journal of Machine Tools and Manufacture

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a b s t r a c tElectrical discharge milling (ED-milling) is an emerging technology which entails a rotating cylindrical tool that is traversed along a predefined tool path to machine a cavity. This process configuration offers advantages such as minimal time/cost associated with tool manufacture and improved gap flushing, as compared to traditional die-sinking that involves complex three-dimensional tools. Rotating cylindrical tools, however, inherently preclude the machining of sharp features and correspond to increased relative electrode wear; the reduced machining engagement further restricts the machining power which in turn limits the removal rate. To this end, this paper presents a novel tooling concept that relates to a set of standard prismatic tools of an oblong section, which incorporate the favorable functional characteristics of both ED-milling and die-sinking technologies. Aspects of computer-aided manufacture referring to tool selection, sizing and path planning are discussed. The concepts developed are illustrated through the application of an oblong tool that rotates and translates to machine a sample two-dimensional cavity.

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CNC electrical discharge rough machining of turbine blades

Cited by 27 publications

References 16 publications

Influence of flushing holes on the machining performance of blasting erosion arc machining

Influence of flushing holes on the machining performance of blasting erosion arc machining

Micro electric discharge milling process performance: An experimental investigation

Electrical discharge milling with oblong tools

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