Wire temperature is an important parameter in the wire electro-discharge machining (WEDM) process because overheating of the wire can cause the wire to break. It is difficult, however, to measure the wire temperature directly under the condition that the wire is emerged in water and surrounded by the workpiece. Only mathematical analyses by now have been reported to determine such temperature but limited by the assumption of convective heat transfer coefficient and the percentage of energy distribution. Based on the relationship between the wire temperature and the value of its resistance, this paper proposes a measuring system that has been developed to experimentally track and record the average temperature increment of the wire electrode for the WEDM process. With this system, the average temperature increment of the wire under discharges can be as high as 130°C. The average temperature increment of the wire under normal discharges has also been measured for low discharging energy. A typical application of this system is finally discussed in this paper. By measuring the average temperature increment of the wire electrode heated by Joule heating energy, the convective heat transfer coefficient in WEDM is experimentally determined.
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Lambert TA, Murphy KD (2002) Modal convection and its effect on the stability of EDM wires. Int J Mach Sci 44/1:207–216
Murphy KD, Lin ZM (2000) The influence of spatially nonuniform temperature fields on the vibration and stability characteristics of EDM wires. Int J Mach Sci 42/7:1369–1390
Jennes M, Snoeys R, Dekseyer W (1984) Comparison of various approaches to model the thermal load on the EDM wire electrode. Ann CIRP 33/1:93–98
Hargrove SK, Ding D (2007) Determining cutting parameters in wire EDM based on workpiece surface temperature distribution. Int J Adv Manuf Technol 34/3–4:295–299
Saha S, Pachon M, Ghoshal A, Schulz MJ (2003) Finite element modeling and optimization to prevent wire breakage in electro-discharge machining. Mech Res Commun 31:451–463
Obara H, Iwata Y, Ohsumi T, Yasuda O (1995) An attempt to measure a temperature distribution of wire on wire EDM. J Jpn Soc Elec Mach Eng 28(57):21–31
Takeshita S, Kunieda M (1997) Measurement of wire electrode temperature in WEDM process utilizing sensitivity of the detection of discharge location. J Jpn Soc Precis Eng 63(9):1275–1279
Incropera F, De Witt D (2001) Fundamentals of heat transfer. Wiley, New York
Takeshita S, Okumiya K, Kunieda M (1997) Simulation of wire electrode temperature distribution in WEDM. J Jpn Soc Precis Eng 63(10):1464–1468
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Han, F., Cheng, G., Feng, Z. et al. Measurement of wire electrode temperature in WEDM. Int J Adv Manuf Technol 41, 871 (2009). https://doi.org/10.1007/s00170-008-1546-x
- Thermal resistor