Straightening process set-up

A correct straightening process set-up depends on an analysis of the product to be straightened, an analysis of the straightened material production process, and an analysis of the final product.

The areas of responsibility and test methods covered by the various analyses are highlighted in the Willy Wire flow chart on page 13. As the basic conditions for setting up the straightening process they are summarized once again in the graphic on the opposite page. This procedure has to be followed in order to choose the correct straightening system, the correct number of straightening rolls, and the correct location of the one or more straighteners.

The purpose in setting up a straightening process is to determine the status quo from the essential analyses and to define the production steps and corresponding equipment needed to obtain the final product. Using our knowledge of the process we can create constant process transitions, i.e. output and input parameters, in order to produce constant final results.

Constant and reproducible straightening roll settings based on the constant input parameters known to us at the beginning of the straightening process result in a constant final curvature.

If all these aspects are duly considered, the straightener will provide optimal processing conditions for obtaining a final product of the required quality.

The complete sequence — process set-up, the three analyses, determination of the straightening system, adjustment, straightening, testing and correction — is summarized in the straightening flow chart at the front of the book.