Observation and analyzation of plasma channel evolution behavior in air flushing electrical arc machining
- 22 Downloads
Abstract
Blasting erosion arc machining (BEAM) is a novel and promising electrical machining process for difficult-to-cut material processing. In this research, air is applied as an alternative dielectric to investigate the feasibility of dry BEAM. An arc plasma observation experiment is designed and conducted based on a four-channel intensified charge-coupled device (ICCD) high-speed camera in order to observe and investigate the arc plasma expansion and deflection behavior. Furthermore, the influence of the aerodynamic force on plasma column deflection is also studied through comparing the images under different airflow velocities. Voltage and current waveforms were captured to verify the positive effect of air flushing on plasma channels’ deflection behavior. Additionally, crater geometries on the workpiece and electrodes were also observed and discussed as a means to analyze the effect of airflow on machining characteristics. The experimental results reflected that aerodynamic arc disturbing mechanism can be realized in air flushing BEAM, which is a promising process of working fluid for BEAM.
Keywords
Blasting erosion arc machining (BEAM) Air dielectric Arc plasma channel expansion Plasma movement Crater geometryPreview
Unable to display preview. Download preview PDF.
Notes
Funding information
The authors received financial support from the National Science Foundation of China (Grant No. 51235007, 51575351) and the State key Laboratory of Mechanical System and Vibration of China (Grant No. MSV201305).
References
- 1.Xu H, Gu L, Chen J, Hu J, Zhao W (2015) Machining characteristics of nickel-based alloy with positive polarity blasting erosion arc machining. Int J Adv Manuf Technol 79(5-8):937–947CrossRefGoogle Scholar
- 2.Chen J, Gu L, Xu H, Zhao W (2016) Study on blasting erosion arc machining of ti“C6al”C4v alloy. Int J Adv Manuf Technol 85(9-12):2819–2829CrossRefGoogle Scholar
- 3.Gu L, Chen J, Xu H, Zhao W (2016) Blasting erosion arc machining of 20 vol.% sic/al metal matrix composites. Int J Adv Manuf Technol 87(9-12):2775–2784CrossRefGoogle Scholar
- 4.Zhao W, Gu L, Xu H, Li L, Xiang X (2013) A novel high efficiency electrical erosion process “C blasting erosion arc machining <î. Procedia Cirp 6(6):621–625CrossRefGoogle Scholar
- 5.Gu L, Zhang F, Zhao W, Rajurkar KP, Malshe AP (2016) Investigation of hydrodynamic arc breaking mechanism in blasting erosion arc machining. CIRP Ann Manuf Technol 65(1):233–236CrossRefGoogle Scholar
- 6.Zhang F, Gu L, Chen J, Xu H, Zhao W (2015) Observation and modeling research of high-velocity flushing effect on the performance of beam. Int J Adv Manuf Technol 86(1-4):1–8Google Scholar
- 7.Kunieda M, Yoshida M, Taniguchi N (1997) Electrical discharge machining in gas. CIRP Ann Manuf Technol 46(1):143–146CrossRefGoogle Scholar
- 8.Kunleda M, Miyoshi Y, Takaya T, Nakajima N, Yu ZB, Yoshida M (2003) High speed 3d milling by dry edm. CIRP Ann Manuf Technol 52(1):147–150CrossRefGoogle Scholar
- 9.Kunieda M, Takaya T, Nakano S (2011) Improvement of dry edm characteristics using piezoelectric actuator. CIRP Ann Manuf Technol 53(1):183–186CrossRefGoogle Scholar
- 10.Zhang M, Zhang Q, Wang H, Liu G, Guo T (2015) Research on a single pulse discharge to discriminate edm and eam based on the plasma tunnel and crater geometry. J Mater Process Technol 219:248–256CrossRefGoogle Scholar
- 11.Shen Y, Liu Y, Sun W, Dong H, Zhang Y, Wang X et al (2015) High-speed dry compound machining of ti6al4v. J Mater Process Tech 224:200–207CrossRefGoogle Scholar
- 12.Maecker HH (1971) Principles of arc motion and displacement. Proc IEEE 59(4):439–449CrossRefGoogle Scholar
- 13.Kojima A, Kunieda M (2007) Study of thermal equilibrium of edm arc plasma by spectroscopy. Journal of the Japan Society of Electrical Machining Engineers 41(97):56–60CrossRefGoogle Scholar
- 14.Zhu Y, Farhadi A, He G, Liu X, Gu L, Zhao W (2018) Influence of gap air flushing on plasma channel and crater geometry in single blasting erosion arc discharge <î. Procedia Cirp 68:210–214CrossRefGoogle Scholar
- 15.Farhadi A, Zhu Y, Gu L, Zhao W (2018) Influence of electrode shape and size on electric arc channel and crater <î. Procedia Cirp 68:215–220CrossRefGoogle Scholar
- 16.Natsu W, Ojima S, Kobayashi T, Kunieda M (2004) Temperature distribution measurement in edm arc plasma using spectroscopy. JSME Int J 47(1):384–390CrossRefGoogle Scholar
- 17.Kitamura T, Kunieda M, Abe K (2015) Observation of relationship between bubbles and discharge locations in EDM using transparent electrodes. Precis Eng 40:26–32CrossRefGoogle Scholar
- 18.M.Steenbeck Z (1932) Phys. 33:809Google Scholar
- 19.Pan J, Hu S, Yang L, Chen S (2016) Numerical analysis of the heat transfer and material flow during keyhole plasma arc welding using a fully coupled tungsten“Cplasma”Canode model. Acta Mater 118:221–229CrossRefGoogle Scholar
- 20.Ogino Y, Hirata Y, Kawata J, Nomura K (2013) Numerical analysis of arc plasma and weld pool formation by a tandem tig arc. Welding in the World 57(3):411–423Google Scholar