Abstract
In this chapter the existing friction conditions between the rolls and the workpiece of a hot skew roll piercing mill are evaluated. A modified model of this process without the inner plug has been simulated, using the Finite Element Method (FEM ) and validated with experimental data extracted from the industrial process. Three friction laws have been considered for the simulation of the friction conditions between the rolls and the workpiece: Coulomb, Tresca and Norton. Then, their performance have been evaluated in terms of velocity, power consumption and sliding velocity at the interface. On the one hand, the inappropriateness of Coulomb law for this type of processes has been demonstrated. On the other hand, between Tresca and Norton laws, some differences are appreciable. Tresca law reproduces correctly the velocity of the process, but Norton law is more accurate regarding the estimation of frictional power losses. As hot rolling is a process with high energy consumption, Norton results to be the more complete law for the simulation of this kind of rolling processes.
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Murillo-Marrodán, A., García, E., Cortés, F. (2019). Study of Friction Model Effect on A Skew Hot Rolling Numerical Analysis. In: Ao, SI., Gelman, L., Kim, H. (eds) Transactions on Engineering Technologies. WCE 2017. Springer, Singapore. https://doi.org/10.1007/978-981-13-0746-1_29
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DOI: https://doi.org/10.1007/978-981-13-0746-1_29
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