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

Li, Junye; Zhu, Jinbao; Zhang, Hengfu; Peng, Qifei; Li, Xueguang; Zhang, Dongmei; Zhao, Weihong

doi:10.1007/s00170-021-07537-x

Cited by 9 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taher et al investigate the unsteady Reynolds-averaged Navier-Stokes simulations of the turbulent cavitating ow around a hydrofoil CLE [18]. Li et al explore the vortex formation mechanism of a special inner curved surface machined by abrasive ow precision machining, the large eddy simulation method is used to analyze the precision machining behavior of abrasive ow and the effect of vortex clusters on the wall under different inlet pressure [19]. Santos et al investigate the potential of large-eddy simulation (LES) to assess the in uence of turbulent eddies on averaged concentration over short time intervals and, thus, with LES results compared with wind-tunnel data [20].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness analysis of abrasive flow machining on elbow inner-surface finish

Li,

Tian,

Yin

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Higher standards have been set for elbow-type parts' inner-surface nish in industrial production. The in uence mechanism of inlet velocity, bend ratio, and bending angle on the surface quality of elbows is analyzed to study the surface quality control technology of abrasive ow machining (AFM) elbows, and the surface quality control method of elbows in AFM is established. The results of the numerical simulation demonstrate that a suitable increase in inlet velocity can enhance the machining effect of the abrasive ow; a smaller curvature radius has a higher machining intensity and a larger curvature radius has a better overall machining uniformity; the numerical simulation also con rms that the analysis of the ow state in the 90° elbow applies to elbows with different bending angles, demonstrating the analysis's applicability. The test results of the curvature radius are consistent with the results of the numerical simulation, and for a larger curvature radius, the inlet velocity or inlet pressure can be increased appropriately to achieve better surface quality control. The test results of the inlet pressure show that increasing the inlet pressure can improve the machining effect of the abrasive ow, indicating that the inlet pressure and inlet velocity are proportional to each other. Therefore, the experimental ndings con rm the accuracy of the numerical calculations and offer technical support for the elbow AFM quality control system that has been developed.

show abstract

Section: Introductionmentioning

confidence: 99%

Effectiveness analysis of abrasive flow machining on elbow inner-surface finish

Li,

Tian,

Yin

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Zhang et al [19] found that the thickness of oxide film affects polishing uniformity when CBN abrasive grains are mixed with AFM to process the hollow bearings. Zhao et al [20,21] numerically studied the inner surface processing mechanism by AFM and found that pressure at the inlet affects the intensity of turbulent flow; the stronger the intensity of turbulent flow, the higher the efficiency of processing. In order to polish the raceway of a large ring, Gao et al [22] developed a fixture to guide the slurry's behavior and obtained the surface roughness of 0.1 μm.…”

Section: Introductionmentioning

confidence: 99%

Shear-thickening polishing of inner raceway surface of bearing and suppression of edge effect

Guo

Wang

Lyu

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Shear-thickening polishing is a non-traditional finishing method that uses the shear thickening effect by impacting the non-Newtonian fluid over the machining surface. As a result, it forms a velocity gradient that increases viscosity sharply, producing a flexible fixed abrasive tool to remove the material. Shear-thickening polishing is applied for finishing the outer surface of the rotary workpiece in previous work. The material removal distribution on the inner surface is completely different from those on the outer surface due to the different structure. The thickened slurry tends to form a relatively dense boundary layer on the surface, resulting in a decrease in the polishing quality and efficiency. The present study investigates the effect of impact angle of slurry and polishing velocity on polishing quality to obtain the uniform surface morphology of the ring's inner surface by the shear-thickening polishing process. The inner raceway of the outer ring of the tapered roller bearing 30203 was taken as the machining object. The numerical material removal model of raceway surface was built according to the rheological performance of shear-thickening slurry. A mathematical geometric model is used to explore the real impact angle of slurry. The model was able to accurately predict the experimental conditions, and the results of the simulation were in good agreement with the model's predictions. In the fixture, a guide block was introduced to guide the flow of the slurry, ensuring consistent material removal across the whole surface. The optimal experimental results show that the average surface roughness measured by Ra reduces from 300 nm to 42.9 nm in 30 minutes, which further drops to 11.16 nm in 90 minutes with a variance of 0.58 nm 2 . The conclusion could be drawn from the studies of this paper that uniform inner raceway surface of bearing is achievable through properly designed STP process.

show abstract

“…Mohseni [8] et al proposed a consistent numerical method capable of dealing with fluid-structure interface problems as well as surface erosion to simulate soft abrasive flow processing and contribute to a more in-depth understanding of the process. Li [9][10][11] et al studied the process characteristics of abrasive flow processing with shaped cross sections. Huang [12] et al calculated the transient flow gas phase field and the motion, dynamics and collision characteristics of sand and used the Archard wear model to calculate the amount of wear on the sandblaster and analyze the wear pattern.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of cross-hole deburring by abrasive flow in a three-way hole

Wang¹,

Li²,

Yang³

et al. 2022

Vib. proced.

Self Cite

View full text Add to dashboard Cite

The SST k-ω method is used to numerically simulate the effect of the inlet pressure and processing method on the machining of a three-way hole, revealing the effect of dynamic pressure and wall shear on the machining of the grain flow with different processing parameters. The simulation results show that increasing the inlet pressure and choosing a suitable processing method can improve the processing effect of abrasive flow processing.

show abstract

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

Cited by 9 publications

References 29 publications

Effectiveness analysis of abrasive flow machining on elbow inner-surface finish

Effectiveness analysis of abrasive flow machining on elbow inner-surface finish

Shear-thickening polishing of inner raceway surface of bearing and suppression of edge effect

Numerical simulation of cross-hole deburring by abrasive flow in a three-way hole

Contact Info

Product

Resources

About