摘要
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。
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. ERWR and 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.
出处
《电加工与模具》
2013年第6期15-19,共5页
Electromachining & Mould
