CAJ | 학술논문

为解决钛合金在煤油介质中电火花加工效率低及在蒸馏水介质中加工表面质量差的问题，提出利用乳化剂将煤油和蒸馏水超声振动后形成水包油型乳化液作为工作介质的加工方法。分别以煤油、水包油型乳化液和蒸馏水为工作介质，对钛合金 TC4进行放电加工试验，从加工效率、电极相对损耗率和表面质量三个方面，对比研究了不同工作介质中钛合金电火花加工的特性。试验结果表明：水包油型乳化液中的加工效率是煤油中加工效率的两倍左右，工件表面粗糙度值Ra比蒸馏水中的Ra 值减小了15%~20%，加工后工件表面微裂纹较少，表面较平整，但其电极相对损耗率高。
위해결태합금재매유개질중전화화가공효솔저급재증류수개질중가공표면질량차적문제，제출이용유화제장매유화증류수초성진동후형성수포유형유화액작위공작개질적가공방법。분별이매유、수포유형유화액화증류수위공작개질，대태합금 TC4진행방전가공시험，종가공효솔、전겁상대손모솔화표면질량삼개방면，대비연구료불동공작개질중태합금전화화가공적특성。시험결과표명：수포유형유화액중적가공효솔시매유중가공효솔적량배좌우，공건표면조조도치Ra비증류수중적Ra 치감소료15%~20%，가공후공건표면미렬문교소，표면교평정，단기전겁상대손모솔고。
To solve the problems for TC4 EDM,such as lower machining efficiency in kerosene and bad surface quality in distilled water,the kerosene and emulsifier were added into distilled water and vibrated by ultrasound to form oil-in-water emulsion herein.To study the characteristics of three kind of dielectrics used in TC4 EDM,kerosene,oil-in-water emulsion and distilled water were used as working dielectrics to machine titanium alloy,they were compared in aspects of MRR,electrode wearing rate (EWR)and surface quality.Results show that:two times higher machining efficiency in oil-in-water emulsion can be obtained than in kerosene and the surface roughness is decreased 1 5%~20% than in distilled water.After machining in oil-in-water emulsion,there are less surface microc-racks on the workpiece,and its surface smoothness is better than the others machined in kerosene and distilled water,but the EWR is higher.