Development and testing of procedures for optimizing the degree of strip reduction during skin-pass rolling
The problem of maintaining the yield stress of the skin passed strip as constant as possible is a common problem both for steel grades with upper and lower yield point and for steel grades with a continuos variation of yield point. The main results are: a FEM elasto-plastic model has been used to obtain rolling forces and length of the contacting arc for a range of temper rolling conditions. A typical auto-adaptive procedure, utilizing the simplified mathematical modelling algorithms for calculating skin-pass-rolling parameters, has been adopted. This pre-setting system has been tested on the temper 80" mill at ILP/Novi Ligure Works. The comparison between the measured and calculated skin pass forces, in a static mode, without utilizing the auto-adaptive procedure results in a root mean square error (RMS) of about 12.9%. Otherwise, a RMS error of about 8.8% has been obtained for the steady state rolling condition, at high rolling speed. A greater scattering has been obtained in the case of the threading rolling force prediction, with a RMS error of about 9.7%.
Bibliographic Reference: EUR 18917 EN (1999) 118pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-7169-X
Record Number: 199911455 / Last updated on: 1999-10-01
Original language: en
Available languages: en