不同加工液（煤油、蒸餾水、混合液）對鈦合金（Ti-6Al-4V）放電加工特性之影響
碩士 === 國立中央大學 === 機械工程研究所 === 88 === In order to improve the material removal rate of Titanium alloy（Ti-6Al-4V），this experiment will mix up kerosene and distilled water。First，the Ultrasonic cleaning machine to vibrate and mix above two fluid，in order to get excellent mixing effect，then these fluid w...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2000
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| Online Access: | http://ndltd.ncl.edu.tw/handle/02221138761257302789 |
| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 88 === In order to improve the material removal rate of Titanium alloy（Ti-6Al-4V），this experiment will mix up kerosene and distilled water。First，the Ultrasonic cleaning machine to vibrate and mix above two fluid，in order to get excellent mixing effect，then these fluid will full stir using the mixing system when EDM is beginning machining。And then using the above mixing fluid in EDM finishing machining（Ip=5A、τon=20μs），the material removal rate can increase to 60﹪~ 70﹪than distilled water in EDM ，but the surface roughness only increase about 0.5μm（Ra），So proper proportion of mixing fluid and full stirred dielectric fluid is the important factor。
And，increasing the working time will lead to 10﹪~ 20﹪of the material removal rate，However，because of adding kerosene，there will be two disadvantages in the machining process。When working depths are reached at some certain values。First，the surface roughness will be become to worse when carbon build-up on the workpiece。Second，the secondary discharge will be happened because of harding to exclude debris，but these can be improved by spurting liquid or other means。
Distilled water which added proper proportion of kerosene was not found in using as dielectric fluid at other researches。So，in our studies，there are some special physical phenomenon have been proposed，we hope these results can help the industry。
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