CAJ | 학술논문

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。
채용실험여방진상결합적방법，통과설계불동적봉치전류급맥관등가공삼수，대수중전화화가공적능량분배계수급전식갱형모적형성진행료연구。기우COMSOL MULTIPHSICS방진연건건립고체-류체전열우합모형。통과시험득도불동봉치전류급맥관조건하적전식갱반경，결합최소이승법의합전식갱반경여맥관、전류지간적관계。이용의합공식화소건모형，재불동가공삼수하득도불동능량분배계수대응적전식갱척촌。통과여시험측량결과진행비대득도수중전화화방전적능량분배계수，병험증소건모형적정학성。
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.