Redução de falhas em mancais de rolamentos no processo de laminação a quente: estudo de caso

Abstract

This paper presents a case study where they were applied the methods of Pareto and FMEA in roller bearings for a hot rolling system of a steel mill, with the aim of drawing up a maintenance plan to identify and reduce failures. The case study was prepared between the years 2011 to 2013, developed in a company in the steel sector. The historic survey of fault occurrences, through history and records and then used as quality tools: Pareto to aid identification and prioritization, as well as the methodology for the creation of the FMEA maintenance and inspection of the plan equipment, all this with the support of mechanics and engineers added expertise in the industry. After the implementation of the methodology, in little more than a year, it was possible to obtain a reduction in the number of failures in 87.5%, a significant result for the whole team that went on to expose less in corrective and rework; as for the process, where it was possible to reduce the unavailability of equipment, adding 2011 and 2012, reached 43 h and 58min, for 4h and 05 min in 2013, in addition to the cost reduction in the recovery of the components within 1,150.00% of R $369,184.00 R $23,074.00. These advances have strengthened the use of methodologies used by Reliability and were fundamental to improving the company's competitiveness on the market.