Study on Chamber Structure Optimization and Nozzle Aperture of Fluid Jet Polishing Tool

Abstract

The design of fluid jet polishing (FJP) tool is an important part of the FJP process.By studying effects of different tool chambers on flow-beam velocity and pressure,the paper determines the optimal type of polishing tool and provides the optimal design method.It studies those removal rates and shapes of removal function under different apertures by establishing FJP discrete phase model and flushing erosion model for simulation and experiment.The results show that in structure,the chamber shall be designed to be larger in diameter and shorter in length,and ensure the fluid movement direction is consistent with the nozzle discharge direction,so as to improve the quality of the flow beam.As the decrease of nozzle aperture, the removal rate increases and the proportion of low removal area in the center of M-shaped removal function decreases.Under experimental conditions,the Gaussian removal function can be obtained when the aperture is smaller than 0.25mm.This paper provides a reference for the real design of jet polishing tool structure.