Investigation of Friction Coefficient Effects on Fishtail Defect in Hot Ring Rolling Process

Document Type : Persian

Authors

1 M.Sc. Student, Mechanical Engineering Department, Isfahan University of Technology

2 Associate Professor, Mechanical Engineering Department, Isfahan University of Technology

3 Assistant Professor, Malek-ashtar University of Technology, Shahinshahr Branch

Abstract

Hot ring rolling is a highly nonlinear, unsteady-state and asymmetry process which is affected by many parameters. The friction coefficient between the ring ,the driver roll and the idle roll is one of the problems, which has significant effect on the quality of final product. In this study, the effect of these two parameters on hot ring rolling was investigated based on a 3D coupled-thermo mechanical FE model. The 3D model of ring rolling process was built in ABAQUS including ring, driver roll, idle roll and guide roll. The value of fishtail defect was measured for different friction coefficients between ring and driver roll and also ring and idle roll. The results show that the value of the fishtail defect decreases with the increase of the friction coefficient between the ring and the idle roll or the decrease of friction coefficient between the ring and the driver roll. Furthermore the value of the fishtail defect increases with the decrease of the friction coefficient between the ring and the idle roll or the increase of friction coefficient between the ring and the driver roll. Also the value of these two parameters must be restricted in a specific range, upper and lower values are not allowed. The obtained results may provide a guide for process optimization.

Keywords

References

[1] Mamalis A.G., Hawkyard J.B., Jhonson W.,  Spread and flow patterns in ring rolling,
Int J. mech. Sci, 18, 1975,  pp. 11-16.
[2] Guo L.G., Yang H., Zhan M., Research on plastic deformation behavior in cold ring rolling by FEM numerical simulation, Modeling and Simulation in Material Science and Enginnering, 13, 2005, pp.  1029-1046.
[3] Wang M., Yang H., Sun Z.C., Gup L.G.,  Dynamic explicit FE modeling of hot ring rolling process, Trans. Nonferrous Met. Soc. China, 16(6), 2006, pp.  1274-1280.
[4] Li L.Y., Yang H., Guo L.G., Sun Z.C., , Research on interactive influence of parameters on T-shaped cold ring-rolling by 3d-FE numerical simulation, Journal of Mechanical Science and Technology, 21(10), 2007, pp. 1541-1547.
[5] Sun Z.C., Yang H., Ou X.Z., Thermo-mechanical coupled analysis of hot ring rolling process, Trans. Nonferrous Met. Soc. China, 18, 2008,
 pp. 1216-1222.
[6] Anjami N., Basti A., Investigation of rolls size effects on hot ring rolling process by coupled thermo-mechanical 3D-FEA, Journal of Materials Processing Technology, 210,2010, pp. 1364-1377.
 [7] Tekkaya, A.E., State-of-the-art of simulation of sheet metal forming. J. Mater. Process. Technol. 103, 2000, pp. 14-22.
[8] Getting Started with ABAQUS, 2003, Version 6.9, ABAQUS Inc.
[9] Software library: DEFORM-3D Software.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Files

Share

How to cite

Statistics