Abstract
Deep narrow slots (DNSs) are typical difficult-to-machine structures. At present, EDM is the main machining method of DNSs. However, due to the difficulty in evacuating discharge products, machining of DNSs becomes difficult and time-consuming when the machining depth grows. Preliminary studies have shown that certain machining attitudes have a higher machining efficiency than the traditional downward-feeding machining attitude during a fixed attitude machining. To further accelerate the evacuation of discharge products and improve the machining efficiency of DNSs, a dynamically variable attitude EDM machining method for DNSs is proposed. The simulation of motions of discharge products in the gap flow field shows that the dynamically variable attitude EDM machining method can promote the evacuation of discharge products. Experiments are carried out to investigate the effect of different process parameters in the dynamically variable attitude method on the machining efficiency of machining DNS structures. The results show that the dynamically variable attitude method has higher machining efficiency than the fixed attitude machining method. The machining time under the dynamically variable attitude method is shortened by 13.02% compared with the horizontal fixed attitude machining and 19.04% shorter than the traditional downward-feeding machining. To find out the reasons for the improvement of the machining efficiency caused by the dynamically variable attitude method, gap states during the whole machining process are collected and analyzed.
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References
Klocke F, Holsten M, Welling D, Klink A, Perez R (2015) Influence of threshold based process control on sinking EDM of a high aspect ratio geometry in a gamma titanium aluminide. Procedia CIRP 35:73–78
Al-Azzawı MHN (2020) Numerical investigation of transient thermal and structural analysis in electrical discharge machining (EDM) process by using finite element method (Master's thesis, Altınbaş Üniversitesi)
Flao O, Ayesta I, Izquierdo B, Sáncshhez JA, Zhao Y, Kunieda M (2017) Improvement of EDM performance in high-aspect ratio slot machining using multi-holed electrodes. Precis Eng 51:223–231
Kai O, Woidasky J, Hoffmann AM, Moser M (2019) Suitability of electrical discharge machining debris particles for usage as a powder for selective laser melting: an explorative study. Prog Addit Manuf 4(4):443–449
Plaza S, Sanchez JA, Perez E, Gil R, Izquierdo B, Ortega N, Pombo I (2014) Experimental study on micro EDM-drilling of Ti6Al4V using helical electrode. Precis Eng 38(4):821–827
Koyano T, Hosokawa A, Suzuki S, Ueda T (2015) Influence of external hydrostatic pressure on machining characteristics of electrical discharge machining. CIRP Ann 64(1):229–232
Zhang S, Zhang W, Liu Y, Ma F, Su C, Sha Z (2017) Study on the gap flow simulation in EDM small hole machining with Ti alloy. Adv Mater Sci Eng
Zhang M, Zhang Q, Dou L, Liu Q, Dong C (2016) Effects of flushing on electrical discharge machining and electro-arc machining. Proc Inst Mech Eng Part B J Eng Manuf 230(2):293–302
Shimasaki T, Kunieda M (2016) Study on influences of bubbles on ECM gap phenomena using transparent electrode. CIRP Ann 65(1):225–228
Wang J, Jia Z (2018) Efficiency improvement in electrical discharge machining (EDM) of constant section cavity based on experimental study and numerical calculations. Prod Eng 1–12
Liao YS, Liang FY, Tsai YY (2018) A study of the debris exclusion for various cross-section electrodes in linear motor equipped deep cavity EDM process. Procedia CIRP 68:660–665
Wang J, Han F, Cheng G, Zhao F (2012) Debris and bubble movements during electrical discharge machining. Int J Mach Tools Manuf 58:11–18
Egashira K, Taniguchi T, Hanajima S, Tsuchiya H, Miyazaki M (2006) Planetary EDM of micro holes. Int J Electr Mach 11:15–18
Flaño O, Bravo H, Ayesta I, Ramos JM, Zamakona I (2020) Enhancement of EDM performance in high-aspect ratio slots for turbomachinery by planetary motion of the electrode. Procedia CIRP 95:516–521
Goiogana M, Sarasua JA, Ramos JM, Echavarri L, Cascón I (2016) Pulsed ultrasonic assisted electrical discharge machining for finishing operations. Int J Mach Tools Manuf 109:87–93
Zhang QH, Zhang JH, Ren SF, Deng JX, Ai X (2004) Study on technology of ultrasonic vibration aided electrical discharge machining in gas. J Mater Process Technol 149(1–3):640–644
Lee PA, Kim Y, Kim BH (2015) Effect of low frequency vibration on micro edm drilling. Int J Precis Eng Manuf 16(13):2617–2622
Teimouri R, Baseri H (2014) Optimization of magnetic field assisted EDM using the continuous ACO algorithm. Appl Soft Comput 14:381–389
Lin YC, Chen YF, Wang DA, Lee HS (2009) Optimization of machining parameters in magnetic force assisted EDM based on Taguchi method. J Mater Process Technol 209(7):3374–3383
Bhattacharya A, Batish A, Bhatt G (2015) Material transfer mechanism during magnetic field-assisted electric discharge machining of aisi d2, d3 and h13 die steel. Proc Inst Mech Eng Part B J Eng Manuf 229(1):62–74
Masuzawa T, Tsukamoto J, Fujino M (1989) Drilling of deep microholes by EDM. CIRP Ann 38(1):195–198
Kunieda M, Masuzawa T (1988) A fundamental study on a horizontal EDM. CIRP Ann 37(1):187–190
Liao YS, Liang HW (2016) Study of vibration assisted inclined feed micro-EDM drilling. Procedia CIRP 42:552–556
Zhang RX, Chen M, Li ZL, Xi XC, Zhang YO, Zhao WS (2021) Influence of electrode feed directions on EDM machining efficiency of deep narrow slots. Int J Adv Manuf Technol 117(11):3415–3429
Zhang RX, Chen M, Xi XC, Yan XS, Zhao WS (2020) Study on particle size distribution of debris in electrical discharge machining of deep narrow slots. Procedia CIRP 95(3):476–481
Acknowledgements
This research has been financially supported by the National Natural Science Foundation of China (No. 51805324) and China Postdoctoral Science Foundation (No. 2017M621460).
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This research is financially supported by the National Natural Science Foundation of China (Grant No. 51805324) and China Postdoctoral Science Foundation (No. 2017M621460).
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Rui-Xue Zhang: conceptualization, methodology, software, validation, formal analysis, writing—original draft and editing. Mo Chen: funding acquisition, supervision, writing—reviewing and editing, software. Xue-Cheng Xi: formal analysis, validation. Wan-Sheng Zhao: funding acquisition, supervision, writing—reviewing and editing.
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Zhang, RX., Chen, M., Xi, XC. et al. Study on dynamically variable attitude EDM machining method of deep narrow slots. Int J Adv Manuf Technol 121, 4601–4623 (2022). https://doi.org/10.1007/s00170-022-09675-2
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DOI: https://doi.org/10.1007/s00170-022-09675-2