Journal
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
Volume 143, Issue 6, Pages -Publisher
ASME
DOI: 10.1115/1.4049477
Keywords
EDM; capacitive effect; powder mixed; graphene; PCD; advanced materials and processing; electrical and electrochemical machining; machining processes; nontraditional manufacturing processes; powder processing
Funding
- Australian Research Council [DP18100762]
- National Natural Science Foundation of China [51705040]
- Natural Science Foundation of Jiangsu Province, China [BK20150255]
- Six Talent Peaks Project of Jiangsu Province [GDZB148]
- Jiangsu Overseas Visiting Scholar Program for University Prominent Young & Middle-aged Teachers and Presidents
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AGC-EDM is a high-speed EDM method utilizing active capacitive and powder mixing effects, with a proposed new discharge mechanism. Experimental results verify the capacitance characteristics and chain stacking process of graphene-kerosene dielectrics, and discuss material removal rate, relative electrode wear, and surface roughness with different process parameters.
Active gap capacitance electrical discharge machining (AGC-EDM) is a high-speed EDM method for machining polycrystalline diamond tools utilizing the active capacitive effect and powder mixing effect formed by the kerosene dielectric added with graphene particles. The capacitive effect increases the discharge energy and explosive force, which in turn influences the material removal efficiency; the powder-mixed effect changes the states of dielectric and forms a non-fixed gap discharge process. Take into account these two aspects, a new discharge mechanism of AGC-EDM is proposed to describe the discharge process. Capacitance characteristics and chain stacking process of graphene-kerosene dielectrics are verified by experimental results. The material removal rate, relative electrode wear, and surface roughness are discussed with the pulse duration, peak current, and graphene concentration to study the theories of the new EDM process.
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