An Integrated Digital Image Correlation (IDIC) method has been applied to the cold rolling process, images clearly visualise geometry of roll bite and inlet zone. A key, novel finding is that despite using coils applying entry tension, strip can enter asymmetrically in mill. Moreover, it shown asymmetric feeding results an uneven lubricant film thickness between top bottom surface. detailed fee...

Abstract Results of a study investigating skew rolling process for elongated axisymmetric parts are presented. Despite the fact that technique producing such was developed and implemented in mid-twentieth century, there no studies on this problem. The first part paper presents results FEM modelling stepped axles shafts (solid hollow). analysis performed using MSC Simufact Forming software. nume...

To meet the requirement of lightweight, an increasing number solid shafts are designed to be hollow in transportation industry. In this study, a novel method flat-knifing cross-wedge rolling (FCWR) with single guide is proposed including modified roller, horizontal mill, and single-guide structure, its key problems studied by numerical simulations experimental tests. A mathematical model FCWR r...

This paper is focused on the inherent characteristics of main drive system F5 cold-rolling mill in a steel plant. First, transmission mechanical structure was simplified to five-inertia torsional vibration model. Secondly, coupled model strip and roll established. The electromechanical coupling motor control rotor established again. Finally, AMESim software used calculate natural frequency unde...

This paper investigates a recently derived lower bound stability measure for sampled-data controller structures subject to finitewordlength (FWL) constraints. The optimal realization of the digital PID controller with FWL considerations is formulated as a nonlinear optimization problem, and an efficient strategy based on adaptive simulated annealing (ASA) is adopted to solve this complex optimi...