Engineering Applications of Computational Fluid Mechanics | |
Study of the thermal erosion, ejection and solidification processes of electrode materials during EDM | |
Fujian Ma1  Shengfang Zhang1  Zhihua Sha1  Wenchao Zhang1  Yu Liu1  Dapeng Yang1  Hao Chang2  | |
[1] Dalian Jiaotong University;Zhengzhou Technical College; | |
关键词: edm; material erosion; debris ejection; recast layer solidification; vapor flow; | |
DOI : 10.1080/19942060.2019.1676313 | |
来源: DOAJ |
【 摘 要 】
Due to the complexity of electrical discharge machining (EDM), there is no perfect theory to explain the mechanisms of material erosion, ejection and solidification during the machining process. Therefore, this paper analyzed the micro-process of a single-pulse discharge during EDM and studied the thermal erosion, ejection and solidification processes of the electrode materials. A thermal-fluid simulation model that considered melting-solidification was established. A mathematical model of vapor flow considering the impact pressure was developed, and it was compiled and loaded as a material ejection force in simulations with a user defined function (UDF). The changes in the material ejection, crater formation and material solidification processes at different discharge times were studied. Finally, the simulation results were verified by single-pulse material discharge experiments, which provided a reference for additional understanding of the micro material discharge processes during EDM.
【 授权许可】
Unknown