Abstract

A high-current monopulse electrical discharge machining (EDM) discharge ablation technique (i.e., monopulse EDM ablation) to drill Ti-6Al-4V titanium alloy plates is proposed. The activated surface material that employs discharge energy as induced energy induces a dramatic combustion reaction with oxygen. Perforation under the monopulse discharge effect is achieved depending on ablation energy produced by the metal oxidation reaction. A system with a monopulse generator is established to perform a monopulse EDM ablation drilling experiment on Ti-6Al-4V titanium alloy. The mechanism is analyzed. Mechanism analysis indicates that the process of monopulse EDM ablation drilling generally has five stages, namely, monopulse discharge and formation of the activated area, violent oxidation of the discharge point, oxidation hindered by the oxide layer, transmissible ablation extension, and downward ablation layer by layer. Tests of via holes are performed to compare EDM drilling and monopulse EDM ablation drilling. Results show that perforation is achieved at 500 μs by monopulse EDM ablation drilling for a 10-mm thick titanium alloy plate. However, the machining efficiency of EDM drilling is low (the machining time is 160 s) and cannot meet the value required by high-efficiency machining. The technology can be applied to cutting Ti-6Al-4V titanium alloy plates.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.