Numerical Analysis and Processing Experiment of Double-inlet Restraint Flow Field in the Soft Abrasive Flow Machining

Abstract

Uneven processing effect is conducted by the single-inlet processing device in soft abrasive flow machining,to overcome this problem,a novel double-inlet processing method is brought forward based on the liquid collision theory.Combining shear stress transport(SST) k-ω turbulence model with the mixture model in computational fluid dynamics software,the dynamics characteristics for two kinds of processing devices are studied.The results show that flow field distribution of single-inlet processing device is fixed;on the contrary,a cyclic swing occurs in double-inlet processing device,and there is an improvement of the disorderly movement of abrasive flow.Work piece surface roughness value Ra in single-inlet processing device is disperse after 35 h,and the processing effect is uneven,while the surface roughness of work piece in double-inlet processing device has a centralized distribution and a smaller value than that in single-inlet processing device,and the processing effect is better.The above results show that the flow filed in restraint channel is disturbed by two flows in the double-inlet processing device,disorderly movement of the abrasive flow is improved,and processing quality is better.