The Study of Electric Discharge Machining Mold with ECM
| Autor: | Sheen Wen-Ming, 沈文銘 |
|---|---|
| Rok vydání: | 1995 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 83 The electrolytic machining can be called electrochemical mach- ining (ECM);It is install the metal workpieces at anode pole and fixed the tool to cathode pole, when an electric current is passed between two poles dipped into a liquid solution (elec -trolysis) then obtain the shape、size and surface status that we need from anode. The elect-rolytic polishing is surface treatment technique of ECM. In this context is discussion the factor of ECM by experiment, The factor such as electrolytic time、current density、current wave、even the kind and concentration of electrolysis etc., When the factors be various that may change the workpieces sur- face roughness、shape or dimensions. We apply the results of the experimental design method to get the best combination con- dition, it can offer us some trend of parameter to develop the ECM machine with Fuzzy control and Neural Network (NN). Because the ECM phenomenon is very complicate, According to the experimental results that indicate between the many factor rela- tions have interaction each other to influence surface roughness. Thus we must to do a great of experiments to obtain the optimal parameter value. The experiments contain two parts: 1. The electrolytic polishing of couple electrode. 2. The electrolytic polishing of electric discharge machining (EDM) with practical used electrode. Under the part 1, we find the current wave and the current density interaction are most important and the pulse direct current (PDC) polishing effect best than continuos direct current (CDC), the electrolytic duration time influence slightly; Under the part 2, let we know that when the PDC on time period was shortly then the polishing effect will be grossly and/or the electrolytic fluid resistance depends upon the mold shape especial at corner region to drain the products (or sludge) is more diffucult. Finally,show the electrolytic polishing can to improve the surface roughness by the industrial used electrode at short time. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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