TY - JOUR
T1 - Same-spot micro-ECM based on constant-accelerated movement of the electrode
AU - Chen, Shun Tong
AU - Chiu, Wei Jen
AU - Chiu, Chi Hsien
N1 - Publisher Copyright:
© 2024 Taylor & Francis.
PY - 2024
Y1 - 2024
N2 - An injector nozzle needs a precision upside-down tapered-microhole, and the nozzle material is often a high temperature corrosion resistant alloy that is very difficult to machine. In this study, a same-spot micro-ECM technique with the electrode in “constant-accelerated movement” was proposed. Insulated by electrophoretic deposition, an ultra-fine electrode was inserted deep into the hole and subject gradually to withdrawal from the hole at constant rpm and acceleration. The electric flux intensity acting on the hole-wall gradually decreased and so did the material dissolution rate on the hole-wall, thus creating an upside-down tapered hole with the desired taper-rate. The experiments’ results showed that upside-down tapered holes with taper-rates of T(a=1) = 0.094 (Ra 0.593 μm) and T(a = 2) = 0.02 (Ra 0.435 μm) were produced when the electrode was subject to constant-acceleration withdrawal at 1.0 and 2.0 μm/s2, respectively, and respective spray angles of 31° and 23° were created. The proposed technique is commercially promising in industry.
AB - An injector nozzle needs a precision upside-down tapered-microhole, and the nozzle material is often a high temperature corrosion resistant alloy that is very difficult to machine. In this study, a same-spot micro-ECM technique with the electrode in “constant-accelerated movement” was proposed. Insulated by electrophoretic deposition, an ultra-fine electrode was inserted deep into the hole and subject gradually to withdrawal from the hole at constant rpm and acceleration. The electric flux intensity acting on the hole-wall gradually decreased and so did the material dissolution rate on the hole-wall, thus creating an upside-down tapered hole with the desired taper-rate. The experiments’ results showed that upside-down tapered holes with taper-rates of T(a=1) = 0.094 (Ra 0.593 μm) and T(a = 2) = 0.02 (Ra 0.435 μm) were produced when the electrode was subject to constant-acceleration withdrawal at 1.0 and 2.0 μm/s2, respectively, and respective spray angles of 31° and 23° were created. The proposed technique is commercially promising in industry.
KW - Constant-accelerated movement
KW - Same-spot micro-ECM
KW - electric flux density
KW - material dissolution rate
KW - upside-down tapered-microhole
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U2 - 10.1080/10426914.2024.2311394
DO - 10.1080/10426914.2024.2311394
M3 - Article
AN - SCOPUS:85184154194
SN - 1042-6914
VL - 39
SP - 1236
EP - 1246
JO - Materials and Manufacturing Processes
JF - Materials and Manufacturing Processes
IS - 9
ER -