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Archive | REF: M7903 V1

Rolling of long products - Cylinders, calibration, defects

Author: Claude BATAILLE

Publication date: September 10, 2003 | Lire en français

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    AUTHOR

    • Claude BATAILLE: Former department manager at Ascométal's Fos-sur-Mer plant

     INTRODUCTION

    Roll surface finish plays an important role in ensuring product quality. In addition, flute rolling, which imposes complex internal transformations on the product, must be properly managed, calling on the skills of both the rolling mill operator and the sizer.

    Surface defects observed on rolled products appear during the rolling process, or are caused either by incorrect setting of the train, or by the ingots themselves. To prevent these defects from being passed on to the wire mill, the billets are inspected and, if necessary, repaired during finishing.

    This article describes the stresses placed on cylinders and tooling. It goes on to describe the different types of splines and, finally, explains the defects encountered on products and how to remedy them.

    Note :

    The complete study of the subject includes the articles :

    —  - Rolling of long products. Definitions and parameters ;

    —  - Rolling of long products. Cages and trains ;

    —  - Rolling of long products. Semi-finished and finished products;

    — M 7 903 - Rolling of long products. Rolls, sizing, defects (this article) ;

    - Rolling of long products.

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