Research on quality control of precision machining straight internal gear by abrasive flow based on large eddy simulation

Abstract

Traditional finishing technology is difficult to realize the precision machining of complex geometric parts. Abrasive flow machining technology solves this problem well. Taking the spur internal gear as the research object, the wall shear force, static pressure, dynamic pressure and abrasive velocity vector of the internal channel of the straight internal gear under different inlet velocity, abrasive concentration and abrasive particle size are analyzed by using the large eddy simulation method, and the action law of different parameters on the machining of straight internal gear by solid-liquid two-phase abrasive flow is discussed. At the same time, orthogonal test was carried out. The results show that the solid-liquid two-phase abrasive flow machining technology can effectively remove the burrs, pits and bulges on the tooth surface of spur internal gear, reduce the tooth surface roughness and improve the surface quality. The optimal combination of processing parameters and the primary and secondary order of various factors affecting processing are obtained by range analysis and analysis of variance. The regression equation is constructed by regression analysis to verify the effectiveness and accuracy of the model, which provides theoretical support and data reference for actual processing and production.

Understanding the Mechanism of Abrasive-Based Finishing Processes Using Mathematical Modeling and Numerical Simulation

“…Amar et al developed the analytical and numerical models for abrasive water slurry jet machining (AWSJM) to fabricate the micro-channel using experimental study and CFD simulation, respectively [127]. Zou et al simulated the precision machining of straight internal gear using the large eddy simulation method on the CFD platform [128]. Chen et al [129] have characterized the motion of abrasive particles using CFD-DEM modeling for the abrasive air jet machining process.…”

“…machining of straight internal gear using the large eddy simulation method on the CFD platform [128]. Chen et al [129] have characterized the motion of abrasive particles using CFD-DEM modeling for the abrasive air jet machining process.…”

“…Using the regression equation, the Surface Roughness values are projected, and it is compared with the values obtained from the Fuzzy Logic prediction. Investigation resulted in the fact that the maximization of pressure and minimization of stand-off distance caused the surface roughness to reduce during the Abrasive jet machining process [128].…”