CAJ | 학술논문

为适应不同的电解酸洗工艺需求，设计了一种基于两级逆变的变极性脉冲酸洗电源及其实时控制方式，该电源具有直流、直流脉冲、交流对称脉冲和交流不对称脉冲等输出形式；通过电特性曲线测试分析和酸洗表面的微观形貌观察研究了交流对称脉冲电流模式下脉冲频率和电流密度对电解酸洗的作用。结果表明：存在与电流密度相对应的最佳脉冲频率，在最佳脉冲频率下进行酸洗，氧化皮去除效率高，工件表面光洁；最佳脉冲频率随电流密度的升高单调增加，脉冲频率对酸洗效果有明显的影响；可以通过实时控制频率的方法来提高酸洗效率和改善酸洗效果。
위괄응불동적전해산세공예수구，설계료일충기우량급역변적변겁성맥충산세전원급기실시공제방식，해전원구유직류、직류맥충、교류대칭맥충화교류불대칭맥충등수출형식；통과전특성곡선측시분석화산세표면적미관형모관찰연구료교류대칭맥충전류모식하맥충빈솔화전류밀도대전해산세적작용。결과표명：존재여전류밀도상대응적최가맥충빈솔，재최가맥충빈솔하진행산세，양화피거제효솔고，공건표면광길；최가맥충빈솔수전류밀도적승고단조증가，맥충빈솔대산세효과유명현적영향；가이통과실시공제빈솔적방법래제고산세효솔화개선산세효과。
In order to meet the requirements of various electrolytic pickling processes,this paper designs a bipolar pulse pickling power supply based on a two-stage inverter structure and puts forward its real-time control method. This power supply outputs DC,DC pulse,AC symmetry pulse and AC asymmetry pulse.Through the electrical characteristic analysis and the micro-morphology observation of pickling surface,the effects of pulse frequency and current density on the electrolytic pickling process under the AC symmetry pulse mode are investigated.Experimen-tal results demonstrate that there is an optimal value of pulse frequency corresponding to current density,and the pickling process with the optimal pulse frequency achieves a high removal efficiency of oxide skin with a smooth workpiece surface,and that the pulse frequency of AC symmetry pulse has a significant effect on the pickling re-sult,and the optimal pulse frequency increases with the current density.Therefore,the pickling efficiency and re-sult can be improved by means of the real-time control of pulse frequency.