ANALYSIS OF INTERFACIAL SLIP IN A TWO-ROLL CROSS WEDGE ROLLING PROCESS

摘要

In this work, analytical and numerical methods are introduced for characterizing the nature of interfacial slip in a two-roll CWR operation. The analytical method determines the critical friction coefficient in a two-roll CWR operation based on a transverse section of the tool while the numerical method investigates CWR using a three-dimensional explicit dynamic finite element model (FEM). After being validated by comparison to experiments performed with a CWR prototype machine, the FEM was parameterized to study the influence of CWR process parameters on the global slip at 12 different operating conditions. Based on the analytical and numerical simulation results, the influence of the interfacial friction coefficient, forming angle and stretching angle on the interfacial slip behavior in a two-roll operation are ascertained and discussed.