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Analysis of mechanism based on two types of pulse generators in micro-EDM using single pulse discharge

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Micro-electrical discharge machining (micro-EDM) has become an advanced machining technique in recent times. In the micro-EDM process, the power supply unit (PSU) is an important component because of its considerable influence on the machining parameters. Additionally, there are two main types of pulse generators: RC- and transistor-type pulse generators. In this study, a series of novel analyses and experiments featuring the mechanisms of each of the two types of pulse generators were conducted using single discharge pulse. The discharge characteristics of the two types of generators were discussed first. Then, the differences in their discharge channel radii when using the plasma model with single pulse were presented. In addition, their thermal effects were analyzed using the thermal heat model with single pulse. Lastly, a train of related single pulse discharge experiments was carried out using the two different pulse generators with varied simulation parameters in order to observe real phenomena in micro-EDM. The results of experiments were consistent with those of simulations, and the two different pulse generators can be applied to different situations, depending on the machining circumstances, as a result of their different machining characteristics. The findings of this study are expected to help guide the selection of the pulse generator type based on parameter requirements in micro-EDM.

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  1. 1.

    Unune D R, Mali H S (2015) Current status and applications of hybrid micro-machining processes: a review. P I Mech Eng B-J Eng 229(10):1681–1693

  2. 2.

    Moses M D, Jahan M P (2015) Micro-EDM machinability of difficult-to-cut Ti-6Al-4V against soft brass. Int J Adv Manuf Tech 81(5-8):1345–1361

  3. 3.

    Hashim N L S, Yahya A, Daud M R, Syahrullail S, Baharom A, Khamis N H, Mahmud N (2015) Review on an electrical discharge machining servomechanism system. Sci Iran 22(5):1813–1832

  4. 4.

    Suganthi X H, Natarajan U, Ramasubbu N (2015) A review of accuracy enhancement in microdrilling operations. Int J Adv Manuf Tech 81(1-4):199–217

  5. 5.

    Chavoshi S Z, Luo X C (2015) Hybrid micro-machining processes: a review. Precis Eng 41:1–23

  6. 6.

    Kuriachen B, Varghese A, Somashekhar K P, Panda S, Mathew J (2015) Three-dimensional numerical simulation of microelectric discharge machining of Ti-6Al-4V. Int J Adv Manuf Tech 79(1-4):147–160

  7. 7.

    Kumar S P L, Jerald J, Kumanan S, Prabakaran R (2014) A review on current research aspects in Tool-Based micromachining processes. Mater Manuf Process 29(11-12):1291–1337

  8. 8.

    Jahan M P, Kakavand P, Kwang E L M, Rahman M, Wong Y S (2015) An experimental investigation into the micro-electro-discharge machining behaviour of aluminium alloy (AA 2024). Int J Adv Manuf Tech 78 (5-8):1127–1139

  9. 9.

    Shrivastava P K, Dubey A K (2014) Electrical discharge machining-based hybrid machining processes: a review. P I Mech Eng B-J Eng 228(6):799–825

  10. 10.

    Natarajan N, Suresh P (2015) Experimental investigations on the microhole machining of 304 stainless steel by micro-EDM process using RC-type pulse generator. Int J Adv Manuf Tech 77(9-12):1741–1750

  11. 11.

    Jahan M P, Rahman M, Wong Y S (2011) A review on the conventional and micro-electrodischarge machining of tungsten carbide. Int J Mach Tool Manu 51(12):837–858

  12. 12.

    Paul G, Roy S, Sarkar S, Hanumaiah N, Mitra S (2013) Investigations on influence of process variables on crater dimensions in micro-EDM of gamma-titanium aluminide alloy in dry and oil dielectric media. Int J Adv Manuf Tech 65(5-8):1009– 1017

  13. 13.

    Chung D K, Shin H S, Park M S, Kim B H, Chu C N (2011) Recent researches in micro electrical machining. Int J Precis Eng Man 12(2):371–380

  14. 14.

    Prihandana G S, Sriani T, Mahardika M, Hamdi M, Miki N, Wong Y S, Mitsui K (2014) Application of powder suspended in dielectric fluid for fine finish micro-EDM of Inconel 718. Int J Adv Manuf Tech 75(1-4):599–613

  15. 15.

    Jahan M P, Wong Y S, Rahman M (2010) A comparative experimental investigation of deep-hole micro-EDM drilling capability for cemented carbide (WC-co) against austenitic stainless steel (SUS 304). Int J Adv Manuf Tech 46(9-12):1145–1160

  16. 16.

    Wei L, Zhang L X, Liu W, Jia Z Y, Li A C (2012) A new interpolation method of variable period and step size in micro-EDM milling based on square constraint. Int J Adv Manuf Tech 63(5-8):621–629

  17. 17.

    Han F Z, Wachi S, Kunieda M (2004) Improvement of machining characteristics of micro-EDM using transistor type isopulse generator and servo feed control. Precis Eng 28(4):378– 385

  18. 18.

    Han F Z, Chen L, Zhou X G (2006) Study on the transistor type pulse generator for micro-EDM. Chin Mech Eng 17(20):2094–2097

  19. 19.

    Han F Z, Chen L, Yu D W, Zhou X G (2007) Basic study on pulse generator for micro-EDM. Int J Adv Manuf Tech 33(5-6):474– 479

  20. 20.

    Muthuramalingam T, Mohan B (2013) Influence of Discharge Current Pulse on machinability in Electrical Discharge Machining. Mater Manuf Process 28(4):375–380

  21. 21.

    Jahan M P, Wong Y S, Rahman M (2008) A comparative study of transistor and RC pulse generators for micro-EDM of tungsten carbide. Int J Precis Eng Man 9(4):3–10

  22. 22.

    Jahan M P, Wong Y S, Rahman M (2009) A study on the quality micro-hole machining of tungsten carbide by micro-EDM process using transistor and RC-type pulse generator. J Mater Process Tech 209(4):1706–1716

  23. 23.

    Sheu D Y (2010) Microelectrode tools manufacturing by hybrid circuits Twin-Wire electrodischarge grinding. Mater Manuf Process 25(10):1142–1147

  24. 24.

    Chung D K, Shin H S, Park M S, Chu C N (2011) Machining Characteristics of Micro EDM in Water using High Frequency Bipolar Pulse. Int J Precis Eng Man 12(2):195–201

  25. 25.

    Chu X Y, Zhu K, Wang C M, Hu Z P, Zhang Y R (2015) A Study on Plasma Channel Expansion in micro-EDM. Mater Manuf Process 31(4):381–390

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Correspondence to Wujun Feng.

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Chu, X., Feng, W., Wang, C. et al. Analysis of mechanism based on two types of pulse generators in micro-EDM using single pulse discharge. Int J Adv Manuf Technol 89, 3217–3230 (2017). https://doi.org/10.1007/s00170-016-9287-8

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  • Micro-EDM
  • RC-type pulse generator
  • Transistor-type generator
  • Discharge mechanism
  • Single pulse discharge