Estudo de uma metodologia para repotenciamento de equipamentos siderúrgicos: análise da tesoura volante 230 toneladas

Abstract

With the increased operational requirements in the Brazilian and world industry, companies were required to change parameters of their production process. The change of these parameters such as power, materials, loads, volumes, speed, density, pressure, speed andintensity was often not provided in the original design of the equipment. The replacement of parameters in the equipment makes the projects more expensive and sometimes impractical. The use of equipment with different loads and parameters changed, in many cases, causes anincrease in the number of non-conformities in them, increase in maintenance costs and increased operational damage. For a process of rolling, in steel process, the major equipments is the flying shear to cut the material more robust in the process. The Flying Shear is theequipment responsible for cutting the billets in the rolling production line. With the increasing demand of production and the necessity of manufacture of new products, it starts to inside on this structure, loads of higher transport that conventionally is used for its original size. Thiscause a great number of non conformity, meaning, equipment stops, or production defects, increasing thus, the maintenance costs, reducing the useful life of the system and producing diverse operational damages. The aim of this article is the development of a methodology torepowering of the shears in question. Such methodology presents a sequence of actions that involve concepts of repowering, analytical calculations, techniques of extensometry, telemetry and finite elements method. From this process it is possible to establish the minimum technician and financiers questions necessary for the repowering, giving higher reliability, operational security and extending the useful life of the equipment and the production system .