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Taguchi method is generally used in optimizing process parameters of single response problem. But optimizing of a single response results in the non-optimum values for remaining. So, multi characteristics response optimization may be the solution to optimize multi response simultaneously.This paper presents application of Taguchi optimization method for simultaneous minimization of thickness variation and improving flatness of cold rolled strip.The approach of Taguchi Design for multi objective optimization problem based on multi characteristics response optimization model and utility concept which is used to optimize of process parametersin cold rolling of steel. Taguchi approach which involves using orthogonal arrays to organize parameters affecting the process and the levels at which they should be varies. Taguchi’s L9 orthogonal array is selected for experimental planning. Taguchi based design of experiment applied in second pass in single stand reversing cold rolling mill to optimize rolling parameters for improving thickness variation and flatness of the steel strip. The experimental results showed that combination of process parameters is essential to achieve simultaneous minimization of thickness variation and flatness improvement.

Taguchi approach with Multiple Performance Characteristics for improving Productivity and Quality of Steel in single stand Cold rolling mill