Vortex formation mechanism and experimental research of abrasive flow precision machining special inner curved surface based on large eddy simulation.

Abrasive flow precision machining technology is an effective technology for precision machining special-shaped curved surface products in the mechanical field. In order to explore the vortex formation mechanism of special inner curved surface machined by abrasive flow precision machining, taking the polygonal spiral curved surface tube as the research object, the large eddy simulation method is used to analyze the precision machining behavior of abrasive flow and the effect of vortex cluster on the wall under different inlet pressure. The motion law of abrasive is expounded, the formation mechanism of the fluid vortex is revealed, and the mechanism of abrasive micro-cutting is discussed. The results show that the inlet pressure of abrasive flow plays an important role in the machining quality of abrasive flow. With the increase of inlet pressure, the precision machining quality of abrasive flow is improved accordingly. Properly increasing the inlet pressure of the abrasive flow can effectively improve the inner surface machining quality of the polygonal spiral curved surface tube, and the abrasive flow precision machining technology can obtain the ideal surface quality and improve the surface accuracy of the machined workpiece. [ABSTRACT FROM AUTHOR]