Adequação de torno mecânico manual horizontal antigo à norma regulamentadora 12: segurança no trabalho em máquinas e equipamentos

Abstract

This work aims to develop a study to adapt to Regulatory Standard 12 an old horizontal lathe used in the production of Francis hydroelectric turbines from a company in the central-southern region of Paraná. Equipment that currently operates in the company was used, seeking to offer solutions to make its use safer and more advantageous. The motivation for the study was due to the great impact on the lives of workers directly, valuing health and life. It presents a history of the formation of safety standards up to the present day with 37 regulatory standards available, with examples of the specific standard covered, with NR-12 being the focus, as well as the definition of standards applicable to the standardization of the equipment under study so that it meets the standard, as well as the definition of a lathe for a more specific understanding of safety related needs. Economic points were also presented to justify adaptation without the need to purchase new equipment that costs at least R$150,000.00, which compared to the cost of protections of approximately R$22,000.00, appears to be much more advantageous. The entire development of suitability needs was standardized by an HRN (Hazard Rating Number) risk analysis methodology, supporting decisions and criticalities of action through ranking using four analysis groups that the method offers, namely, degree of possible injury, number of people exposed to the risk, degree of damage resulting from the risk and time of exposure to the risk. In view of these points, protections were offered to mitigate risks related to workplace accidents so that the company can make the decision to install them, by offering an outsourced company to carry out the manufacturing and installation of the safety mechanisms. At the end, the great evolution in safety issues for the use of the machine and economic competitiveness given the investment is made clear.