Multi-phase Interleaved buck-Type Pulse Power Generator for Die-Sinking EDM

Wu, Peng; Yang, Fei; Qin, Defan; Li, Lei; Guan, Lele; Zhao, Wansheng

doi:10.1016/j.procir.2020.01.192

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…The multi-interleaving stagger buck converter controls the discharge current waveform to follow the given reference through high-frequency conversion mode operation and uses interleaving control technology to offset the discharge current ripple to a lower value. A high switching frequency is used in rough machining and a small discharge pulse is used in fine machining [ 12 ]. Yang et al proposed a new bipolar pulse power supply, which uses advanced power electronics technology and has the characteristics of controllable discharge energy in micro EDM.…”

Section: Introductionmentioning

confidence: 99%

Study of the High-Efficiency Ejecting-Explosion EDM of SiCp/Al Composite

Zhao³

et al. 2023

Micromachines

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SiCp/Al composites have excellent physical properties and are widely used in aerospace and other fields. Because of their poor machinability, they are often machined by non-traditional machining methods such as electrical discharge machining (EDM). In the process of EDM, due to the “shielding” effect of the reinforced particles of SiC, the local ejection force is low during the processing process, and it is difficult to throw the reinforced particles smoothly, which ultimately leads to a low material removal rate and poor surface quality. In this paper, a high–low-voltage composite ejecting-explosion EDM power supply is developed to explore the explosive effect of reinforced particles in the ejecting-explosion EDM process and the unique process law of the explosion process. The experiment platform uses self-developed CNC machining machine tools based on an ejecting-explosive EDM power supply, and the influence of a detonation-increasing wave on the processing of SiCp/Al composites with different volume fractions was studied by changing four factors: the open-circuit voltage difference, pulse current difference, pulse phase difference, and pulse width difference of the back wave behind the step front. The material removal rate and surface roughness were measured. The research results showed that the material removal rate could be increased to 164.63%, and the material surface roughness could be increased to 30.03% by adjusting the high and low pulse current difference from 1 A to 8 A. When the voltage difference between high and low wave (HLW) pulses increases from 40 V to 120 V, the material removal rate can be increased to 150.39%, and the material surface roughness can be increased to 20.49%. The material removal rate increases with the increase in pulse phase difference and open-circuit voltage difference. With the increase in peak current difference and pulse width difference, the material removal rate becomes faster at first and then slower. The surface roughness of materials increases with the growth of open-circuit voltage difference, peak current difference, pulse width difference, and pulse phase difference.

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Section: Introductionmentioning

confidence: 99%

Study of the High-Efficiency Ejecting-Explosion EDM of SiCp/Al Composite

Zhao³

et al. 2023

Micromachines

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“…Shinohara et al [8] experimented with various current pulse shapes to assess Material Removal Rate (MRR). Li et al [9] introduced a power supply with adjustable current pulse shapes, and Wu et al [10] presented a pulse power generator for controlling different current shapes. In this paper, we describe the simulation of parasitic components using MATLAB, revealing that these components alter the signal waveform and affect the achievement of a square pulse wave in MRR.…”

Section: Introductionmentioning

confidence: 99%

MATLAB Modeling of Component in Electrical Discharge Machining (EDM) Pulses

Betantya Nugroho,

Yahya,

Mat Sidek

et al. 2023

Media J. Gen. Comput. Sci.

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Electrical Discharge Machining (EDM), is a machining technique for working with conductive materials. During the EDM process, electrical discharge energy is transformed into thermal energy, leading to the erosion of the workpiece. The energy utilized by the EDM process is represented by the time-dependent current, which determines the energy density employed for workpiece erosion. Ideally, during a discharge event, the current pulse should exhibit a square wave shape. However, in practice, EDM circuits often incorporate parasitic components that lead to non-square waveforms or transient currents. In this paper, we describe the simulation of parasitic components using MATLAB, revealing that these components alter the signal waveform and affect the achievement of a square pulse wave in MRR. The presence of parasitic components results in transient current patterns during the discharge phase and, consequently, a reduction in MRR. The implementation of a square wave current, however, enhances the MRR value and increases the efficiency of the EDM process

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