Experimental investigation of a new method combining EDM and ECM to cut the workpiece with foil electrode
Experimental investigation of a new method combining EDM and ECM to cut the workpiece with foil electrode
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DOI：
10.1007/s00170-020-05923-5
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发表时间：
2020-08
期刊：
影响因子：
--
通讯作者：
Xiaoyu Wu
中科院分区：
文献类型：
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作者：
Xiaoyu Wu
放电坑和重铸物是电火花加工表面的特征，会恶化工件的表面质量和疲劳强度等其他性能。在本研究中，提出并通过实验研究了一种新的组合加工方法，该方法利用薄箔作为工具电极，将 EDM 和 ECM 结合到单个工件切片工艺中。该方法利用ECM去除电火花加工表面的放电坑和重铸层，可以提高表面质量。使用箔代替金属丝作为工具电极来切割工件的优点是可以显着减少工具振动并提高电化学溶解的效率。实验结果表明，在不牺牲切削效率的情况下，消除电火花加工表面的凹坑和重铸层可以获得良好的表面质量。研究了复合加工的两个因素，即箔电极的高度和进给速度，这两个因素对最终表面质量有显着影响。通过实验讨论了切口的锥度、切口宽度和刀具磨损。以薄箔作为工具电极的复合加工为未来的工件切片提供了一种有前途的方法。
The discharge craters and recast material are the characteristics of the surface machined by using EDM, which deteriorate the surface quality and other properties such as fatigue strength of the workpiece. In this study, a new combined machining method which utilizes a thin foil as tool electrode and combines EDM and ECM into a single process for slicing workpiece is proposed and investigated through experiments. The method can improve the surface quality by using ECM to remove the discharge craters and recast layer of EDM surface. The advantages of utilizing a foil instead of a wire as tool electrode for slicing the workpiece is that tool vibration can be considerably reduced and the efficiency of electrochemical dissolution increased. The experimental results show that good surface quality can be obtained by eliminating the craters and recast layer of EDM surface without sacrificing the cutting efficiency. Two factors of the combined machining, namely the height and the feed rate of the foil electrode, which have significant influence on the final surface quality are investigated. The taper of the kerf, kerf width, and tool wear are discussed experimentally. The combined machining with a thin foil as tool electrode provides a promising method for workpiece slicing in the future.