A New Model for the Prediction of Roll Force and Tension Profiles in Flat Rolling

Abstract

This paper presents a precision on-line model for the prediction of the roll force and tension distributions across the strip in hot strip rolling. The approach is based on an approximate 3-D theory of rolling, and in particular, considers the effect of pre-deformation of the strip, which occurs near the roll entrance before the strip enters the bite zone. The prediction accuracy of the proposed model is examined through comparison with the predictions from the 3-D finite element models.KEY WORDS: finite element method; 3-D theory of rolling; hot strip rolling; roll force distributions; tension distributions; pre-deformation zone.

Prediction of Steady‐State Strip Profile in Flat Rolling

“…At the roll gap exit, they may be expressed by the following: where σ zi is the front tension profile, , Y i = flow stress, and , which may be approximated by α i ≈ 0. For the calculation of σ zi ( x ), an approximate model developed by the authors may be used.…”

“…In the past, several approaches are proposed to predict the evolution of the strip profile, with emphasis on on‐line application in the mills. They may be classified as; shape disturbing coefficient ‐based approach, heredity coefficient ‐based approach, and an approximate analytic approach …”

Prediction of Steady-state Strip Profile during Hot Rolling - PartⅡ: Development of a Mathematical Model

“…(3) 바이트존(bite zone)에서 Matsumoto가 제안한 수직 응력(normal stress) 사이의 관계식을 이용하고 ≈ 0 이라 가정하면 다음과 같이 표현된다 [6,7]. [7].…”

Analysis of hot strip rolling using exponent velocity field and MY criterion

“…Wang et al [15] investigated comprehensive influences of normal and shear stress in the directions of length, width and thickness to improve the accuracy of the calculated rolling force using 3D FEM. A new model which is to predict the rolling force based on an approximate 3D theory of plasticity was presented by Kim et al [16]. They examined the prediction accuracy of the proposed model utilizing a rigid-plastic FEM.…”