Abstract
Seamless pipes are produced using piercing rolling process in which round bars are fed between two rolls and pierced by stationary plug. During this process, the material undergoes severe deformation which renders it impractical to perform the numerical simulations with conventional finite element methods. In this paper, three dimensional numerical simulations of the piercing process are performed with Fluid-Structure Interaction (FSI) Method using Arbitrary Lagrangian-Eulerian (ALE) Formulation with LS DYNA software. The results of numerical simulations agree with experimental data of Plasticine workpiece and the validity of the analysis method is confirmed.
Highlights
Metal pipes are classified into welded pipes and seamless pipes
This paper introduces the utilization of Fluid-Structure Interaction method in the simulation of rotary piercing process of seamless pipes
Threedimensional model of the rotary piercing process was developed and the numerical simulations were conducted with Arbitrary Lagrangian-Eulerian formulation in LS-Dyna software and successfully described the deformation of the material throughout the process
Summary
Metal pipes are classified into welded pipes and seamless pipes. Welded pipes are manufactured by bending and welding metal sheets while seamless pipes are produced using piercing process. Seamless pipes are more commonly used in old and gas industries than welded pipes due to their higher reliability [1]. A heated cylindrical workpiece is fed into a plug by the action of two skewed rolls which rotates in the same direction. The rolls are tilted and placed on opposite sides of the workpiece, they provide both rotation and translation to the workpiece. Since the invention of the piercing process over a century ago, numerous empirical and analytical studies have been conducted [2,3]
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