CAJ | 학술논문

通过分析工作介质的粘度对电火花加工时电蚀产物的抛出量、抛出力及工作介质传热性能的影响，研究了钛合金电火花加工的加工效率、电极相对损耗率和表面粗糙度Ra值随介质粘度的变化规律。结果表明：粘度增大能在一定程度上提高加工效率，但粘度过大反而使加工效率下降；电极相对损耗率和表面粗糙度Ra值均随粘度增大而上升；粘度越大的介质传热性能越差，使工件表面不会因快速冷却而产生大量微裂纹。
통과분석공작개질적점도대전화화가공시전식산물적포출량、포출력급공작개질전열성능적영향，연구료태합금전화화가공적가공효솔、전겁상대손모솔화표면조조도Ra치수개질점도적변화규률。결과표명：점도증대능재일정정도상제고가공효솔，단점도과대반이사가공효솔하강；전겁상대손모솔화표면조조도Ra치균수점도증대이상승；점도월대적개질전열성능월차，사공건표면불회인쾌속냉각이산생대량미렬문。
Analyzing the influence of dielectric viscosity on the amount of discharge debris thrown out and the force needed and the thermal conductivity of dielectric,this paper studied material removal rate (MRR),electrode relative wearing rate (ERWR)and surface roughness Ra of titanium alloy EDM with the change of dielectric viscosity. The Results show that, some extent, the raise of viscosity can increase MRR, but when it's excessive, MRR will go down. ERWRand Ra will decrease as the viscosity rises. The bigger the viscosity is, the lower the thermal conductivity of dielectric becomes, leading workpiece surface to produce less micro cracks because of a lower cooling speed.