Analysis for Softness Abrasive Flow Field of the Greater Curvature of Small Size Tube
As it was difficult to solve the near wall characteristics of flow field in softness abrasive flow machining (SAFM) on mould structural surface, a method for simulation the flow characteristics based on the low Re number k-e model was proposed in this paper. The greater curvature of small size tube was used as specific simulation object. The motion law of particles and related parameters were calculated and the precision machining mechanism of SAFM was discussed. Simulation results show that the micro cutting of abrasive flow mainly appears as the transposition of cutting location influenced by the particle pressure, and as the variation of machining efficiency influenced by near-wall particle velocity. Thus via control of the inlet velocity and its corresponding machining time, it is supposed to work out the machining process according with the machining requirements. By tracking near-wall particles, it can be confirm that the movement of near-wall abrasive particles is similar to streamwise vortices. The cutting traces on workpiece surfaces assume disorderly arrangement, so the feasibility of SAFM method can be reaffirmed.
Structural flow passage Ultra-precision machining Softness abrasive flow Low Reynolds K-ε model.
Q.L.Yuan S.M. Ji D.P. Tan L.Zhang Y.C. Wang
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology (Zhejiang University of Technology), Ministry of Education, Hangzhou 310014, China
国际会议
2011 Global Conference on Digital Design and Manufacturing Technology(2011年全国数字设计与制造技术会议)
杭州
英文
125-130
2011-01-23（万方平台首次上网日期，不代表论文的发表时间）