Blasting erosion arc machining(BEAM)is a typical arc discharge machining technology that was developed around 2012 to improve the machinability of difficult-to-cut materials.End milling BEAM has been successfully deve...Blasting erosion arc machining(BEAM)is a typical arc discharge machining technology that was developed around 2012 to improve the machinability of difficult-to-cut materials.End milling BEAM has been successfully developed and preliminarily applied in industry.However,owing to the high complexity of the flow field and the difficulty of observing debris in the discharge gap,studies of the flow and debris in end milling BEAM are limited.In this study,fluid dynamics simulations and particle tracking are used to investigate the flow characteristics and debris ejection processes in end milling BEAM.Firstly,the end milling BEAM m o d e is introduced.Then the numerical modeling parameters,geometric models,and simulation methods are presented in detail.Next,the flow distribution and debris ejection are described,analyzed,and discussed.The velocity and pressure distributions of the axial feed and radial feed are observed;the rotation speed and milling depth are found to have almost no effect on the flow velocity magnitude.Further,debris is ejected more rapidly in the radial feed than in the axial feed.The particle kinetic energy tends to increase with increasing milling depth,and smaller particles are more easily expelled from the flushing gap.This study attempts to reveal the flow field properties and debris ejection mechanism of end milling BEAM,which will be helpful in gaining a better understanding of BEAM.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.51975371,51575351)Innovation and Entrepreneurship Project for High-Level Talents in Jiangsu Province(2019-20)Jiangsu Agriculture Science and Technology Innovation Fund(JASTIF)(Grant No.CX(20)3067).
文摘Blasting erosion arc machining(BEAM)is a typical arc discharge machining technology that was developed around 2012 to improve the machinability of difficult-to-cut materials.End milling BEAM has been successfully developed and preliminarily applied in industry.However,owing to the high complexity of the flow field and the difficulty of observing debris in the discharge gap,studies of the flow and debris in end milling BEAM are limited.In this study,fluid dynamics simulations and particle tracking are used to investigate the flow characteristics and debris ejection processes in end milling BEAM.Firstly,the end milling BEAM m o d e is introduced.Then the numerical modeling parameters,geometric models,and simulation methods are presented in detail.Next,the flow distribution and debris ejection are described,analyzed,and discussed.The velocity and pressure distributions of the axial feed and radial feed are observed;the rotation speed and milling depth are found to have almost no effect on the flow velocity magnitude.Further,debris is ejected more rapidly in the radial feed than in the axial feed.The particle kinetic energy tends to increase with increasing milling depth,and smaller particles are more easily expelled from the flushing gap.This study attempts to reveal the flow field properties and debris ejection mechanism of end milling BEAM,which will be helpful in gaining a better understanding of BEAM.
