Abstract
Background: Electrochemical Machining (ECM) can machine most conductive materials and is not limited by physical properties of materials such as strength, hardness and toughness. However, the process of ECM is unstable as the structure of tool electrode, electrolyte composition and the machining device of ECM will affect machining accuracy and stability of shaped holes. Therefore, people pay more and more attention to the development trend of ECM of shaped holes. Objective: In order to increase machining accuracy and machining stability of ECM of shaped holes, ECM method has been constantly improved. Methods: This paper reviews various representative patents and papers on ECM of shaped holes at home and abroad. Results: By summarizing a large number of patents and papers about ECM of shaped holes, this paper analyzes the structure of tool electrode, electrolyte composition and the machining device of ECM, and the development trend of ECM of shaped holes is also discussed. Conclusion: The optimization of the technological equipment and process of ECM of shaped holes is beneficial to improve the machining accuracy and the machining stability of shaped holes. More interrelated patents on ECM of shaped holes will be invented later.
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