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This paper describes the machining characteristics of the sintered carbide and die steel(STD-11) by electric discharge drilling with various tubular electrodes. Electrical discharge machining(EDM) removes material from the workpiece by a series of electrical sparks that cause localized temperatures high enough to melt or vapourize the vicinity of the charge. In the experiment. four types of electrode which have different diameter are used with the application of continuous direct current and axial electrode feed. The controlled factors include the dimension of the electrode. In drilling by EDM, the dielectric flushed down the interior of the rotating tube electrode, in order to order to facilitate the removal of machining debris the hole.
The expansion increase with increasing the thickness of material and the diameter of electrode and the expansion of sintered carbide is 1.75 times large then that of die steel. The taper of machined hole decrease with increasing the thickness of material. The crater sixe of die steel is larger then thet of sintered carbide and the surface roughness of sintered carbide is 1.58 tims larger then that of die steel.
The expansion increase with increasing the thickness of material and the diameter of electrode and the expansion of sintered carbide is 1.75 times large then that of die steel. The taper of machined hole decrease with increasing the thickness of material. The crater sixe of die steel is larger then thet of sintered carbide and the surface roughness of sintered carbide is 1.58 tims larger then that of die steel.
목차
ABSTRACT
1. 서론
2. 실험장치 및 실험방법
3. 실험결과 및 고찰
4. 결론
참고문헌
참고문헌 (5)
참고문헌 신청
1. [학술지(정기간행물)] - Youn T. W / 1990 / A Study on Micro-Hole Drilling by EDM / Trans. of KSME 14 (5) : 1147 ~ 1154
2. [단행본] - Chang-Ho Kim / 2005 / New Discharge Machining / Kijeon publishing co
3. [학술대회논문] - Chan-Hae Park / 2005 / High-precision molds for the fabrication of semiconductor micro-hole discharge machining / KSMPE Proceedings : 61 ~ 66
4. [학술지(정기간행물)] - Mohri N / 1993 / Metal Surface Modification by Electrical Discharge Machining with Composite Electrode / Annals of the CIRP 42 : 219 ~ 222
5. [학술지(정기간행물)] - 井上潔 / 1987 / 放電加工의 實際와 應用 / 技多利 : 103 ~ 108
2. [단행본] - Chang-Ho Kim / 2005 / New Discharge Machining / Kijeon publishing co
3. [학술대회논문] - Chan-Hae Park / 2005 / High-precision molds for the fabrication of semiconductor micro-hole discharge machining / KSMPE Proceedings : 61 ~ 66
4. [학술지(정기간행물)] - Mohri N / 1993 / Metal Surface Modification by Electrical Discharge Machining with Composite Electrode / Annals of the CIRP 42 : 219 ~ 222
5. [학술지(정기간행물)] - 井上潔 / 1987 / 放電加工의 實際와 應用 / 技多利 : 103 ~ 108
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