点击次数：

所属单位：机电学院

发表刊物：INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

关键字：EDM drilling EDM/ECM combined process TC4 alloy Recast layer

摘要：To reduce the recast layer and cracks formed during the small hole, electrical discharge machining (EDM) of the TC4 alloy, negative polarity EDM, and electrical discharge machining/electrochemical machining combined process (EDM/ECM) were carried out. The machining efficiency, the recast layer, and the cracks were studied. The experimental results showed that when compared with common positive polarity EDM under the specific processing condition, the recast layer of the negative polarity EDM decreased by 65% in thickness but the material removal rate (MRR) decreased by 31%. In EDM/ECM, MMR was 18% higher than the positive polarity EDM, and the majority of the recast layer and the cracks were removed. However, issues including the low efficiency occur during the penetration period. The following paper analyzed the causes of these problems and proposed a novel unitized hole drilling process. In this unitized process, EDM/ECM was initially used and then converted to negative polarity EDM with external flushing water during the penetration period. The general machining efficiency of a single hole increased by 73% over conventional EDM/EDM. Furthermore, only a 7-mu m thick recast layer remained at the hole's outlet, with no obvious cracks found.

ISSN号：0268-3768

是否译文：否

发表时间：2018-07-01

合写作者：陶筱天,邱明波,田宗军,沈理达

通讯作者：田宗军,刘志东