Preliminary study based on turbulence strengthen of softness abrasive flow precision machining by ultrasonic

JI Shi-ming， LI Yi-ran， TAN Da-peng
（Key Laboratory of Special Purpose Equipment and Advanced Processing Technology， Ministry of Education & Zhejiang Province， Zhejiang University of Technology， Hangzhou 310014， China）

Abstract： In order to solve the problems of the uneven distribution of turbulent kinetic energy and dynamic pressure in the fixed constraint module，as well as the processing time is rather long and low processing efficiency in the solid-liquid two-phase softness abrasive flow precision machining，the ultrasonic technology was investigated in the solid-liquid two-phase soft abrasive flow machining. Aiming at the ultrasonic change of the pressure field in the liquid，as well as in the excitation of high amplitude and high frequency alternating pressure field，the periodic cavitation of the flow field was analyzed. The relationship between the ultrasonic excitation and solid - liquid two-phase soft abrasive flow was established. Based on the soft abrasive flow machining method，a method was presented to coupling the ultrasonic in a constrained flow field，so as to achieve the purpose of the disturbed flow field. The new method was evaluated on the reducing processing time，improving processing efficiency and reducing energy consumption. The figures of pressure，speed and turbulent kinetic energy distribution at different times within the constraint flow channel were gotten through a large number of simulations. The results show that the pressure change in the field generated by the ultrasonic field can indeed improve processing efficiency and quality，compared with the steady flow.
Key words： softness abrasive flow； ultrasonic vibration； turbulent kinetic energy； spoiler