摘要
采用实验与仿真相结合的方法,通过设计不同的峰值电流及脉宽等加工参数,对水中电火花加工的能量分配系数及电蚀坑形貌的形成进行了研究。基于COMSOL MULTIPHSICS仿真软件建立固体-流体传热耦合模型。通过试验得到不同峰值电流及脉宽条件下的电蚀坑半径,结合最小二乘法拟合电蚀坑半径与脉宽、电流之间的关系。利用拟合公式和所建模型,在不同加工参数下得到不同能量分配系数对应的电蚀坑尺寸。通过与试验测量结果进行比对得到水中电火花放电的能量分配系数,并验证所建模型的正确性。
By the method combined experiment and simulation,designing different peak currents and pulse durations,energy distribution coefficient of EDM in water and the formation of electro-discharge crater morphology are studied. Based on COMSOL MULTIPHSICS simulation software,a solid-fluid coupling heat transfer model is established. Under the experiment with different peak currents and pulse durations,electro-discharge crater radius are obtained,and the relationship of electro-discharge crater radius between pulse duration and current are fitted. Using fitted formula and established model,the electro -discharge crater radius corresponded with the different energy distribution coefficients under different parameters are calculated. Comparing measuring values and calculated ones,the energy distribution coefficients of electro-discharge in water are oblained,and the model is verified.
出处
《电加工与模具》
2014年第2期1-4,9,共5页
Electromachining & Mould
基金
国家自然科学基金资助项目(51175337)
关键词
水中电火花放电
能量分配系数
固体-流体传热耦合模型
electro-discharge in water
energy distribution coefficient
solid-fluid coupling heat transfer model
