Abstract
Abrasive flow machining technology has unique advantages in improving the surface quality of precision parts. In order to study the effect of abrasive flow machining on the curved inner surface workpieces used in special environments, the U-tube was used as the research object, and the large eddy simulation (LES) method was used to numerically simulate the abrasive flow polishing U-tube process. The turbulence kinetic energy cloud diagram, wall shear stress cloud diagram and fluid trajectory diagram of the abrasive flow composed of solid-phase silicon carbide and liquid-phase oil at different inlet speeds on the inner surface of the U-tube were drawn, and the situation of abrasive flow and vortex formation in the process of abrasive flow machining were obtained. The influence of different inlet speeds on the quality of abrasive flow polishing U-tube was analyzed, which provided theoretical support for future research work.
Highlights
Curved tube parts are widely used in daily life and industrial production
The turbulence kinetic energy cloud diagram, wall shear stress cloud diagram and fluid trajectory diagram of solid-liquid two-phase abrasive flow polishing U-tube are obtained by the large eddy simulation (LES) method
In order to analyze the influence of the inlet speed on the abrasive flow polishing U-tube, the speeds of 30 m/s, 40 m/s, 50 m/s and 60 m/s are used to obtain the trajectory of the fluid, and the trajectory diagram is analyzed
Summary
Curved tube parts are widely used in daily life and industrial production. With the development of society, the requirements for the surface quality of such parts are higher and higher. Butola R. et al summarized the study of the parameters (Number of process cycles, Extrusion pressure and Abrasive concentration) and experimented variation used in Abrasive flow machining (AFM) for the surface finishing process and its optimization using Taguchi method. It had been found through the experiment that the optimum result was obtained when ‘Number of cycles is equal to 6, Extrusion pressure is 15 bars and Abrasive concentration is 100 gm’, which showed that the percentage difference in surface roughness after machining was 26.42 % [4]. The wear and erosion of the abrasive particles and the wall surface of the workpiece were discussed [6]
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