Cristóvãog Nery Giacomin

This study focuses on understanding the strip’s shape evolution during the hot rolling process. An off-line numerical simulation tool was developed to predict the finishing mill setup for the entire roll campaign, including strip crown and flatness evolution. It explores the application of shape simulations to optimize the rolling campaign of a...

This study focuses on understanding the strip's shape evolution during the hot rolling process. An offline numerical simulation tool was developed to predict the finishing mill setup for the entire roll campaign, including strip crown and flatness evolution. It explores the application of shape simulations to optimize the rolling campaign of a hot...

The shape of the hot rolled material has a strong influence on the stability of the rolling process and the quality of the product. The crowning and flatness of the strip are the result of the profile of the work roll and the rolling force imposed on the material. This paper presents the development of an application to automatically simulate the e...

Sistemas de Visão Computacional podem ser utilizados para otimizar o processo em larga escala nas indústrias. Porém, fazer com que o computador seja capaz de reconhecer objetos do mundo real ainda é um dos grandes desafios da computação. O objetivo desse trabalho é detectar, extrair e analisar as características de jatos pulverizadores utilizados n...

Due to the great variety of products produced by Usiminas, the process control for hot rolling of several steels with varying deformation resistance has become a challenge. In this sense it was analyzed industrial data of a group of high strength microalloyed steels produced in the Hot Strip Mill of Usiminas’ Ipatinga site. The mean flow stress was...

Basic characteristics and application examples of the mathematical simulator for reheating process in walking-beam type furnaces, that has been developed and applied to Usiminas plate mill line at Ipatinga, are shown in this paper. This is a bi-dimensional mathematical model solved by the finite volume method, validated by temperature measurements...

Resumo Mostra-se neste trabalho o desenvolvimento de uma ferramenta para simulação computacional do processo de laminação de chapas grossas. Essa ferramenta permite calcular a evolução térmica do esboço, os parâmetros de controle do processo, tais como força, espessura do laminado, torque e corrente nos motores. Os modelos matemáticos podem ser imp...

A computer simulator of walking beam reheating furnaces that predicts slab temperature evolution, scale thickness and dissolution of microalloying elements in steel has been developed. The core of the simulator is a slab heating mathematical model in which the heat transfer equations were solved numerically by the finite volume method. All variable...