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Planeamento de operações de manutenção em equipamentos de empresa de construção
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Abstract(s)
A manutenção industrial desempenha um papel fundamental na garantia da disponibilidade e fiabilidade dos equipamentos, especialmente em contextos exigentes como o setor da construção e mineração. O presente trabalho foi desenvolvido no âmbito de um estágio curricular realizado na empresa de engenharia e construção Mota-Engil, e teve como objetivo a análise e otimização das operações de manutenção de duas categorias de equipamentos pesados de mineração, escavadoras hidráulicas e camiões rígidos, utilizados num projeto em Moatize, Moçambique. Para tal, adotou-se uma metodologia de investigação de carácter exploratório e descritivo,
suportada na análise de dados históricos de manutenção disponibilizados pela empresa. As análises realizadas incluíram o estudo dos custos e da frequência de intervenções preventivas e corretivas, a verificação da conformidade dos planos de manutenção preventiva executados face às recomendações do fabricante, a identificação dos sistemas mais críticos com recurso à análise de Pareto, a categorização das avarias mais recorrentes nesses sistemas e a avaliação de indicadores de desempenho dos equipamentos. Os resultados obtidos evidenciaram uma elevada taxa de manutenção corretiva, principalmente no sistema hidráulico das escavadoras e nos pneus dos eixos traseiros dos camiões. Verificou-se ainda a existência de falhas no registo de dados nas ordens de manutenção, nomeadamente na descrição das avarias, dificultando a análise técnica dos
eventos. Com base nas conclusões obtidas, foram propostas um conjunto de ações de melhoria orientadas para a redução dos custos de manutenção, o aumento da disponibilidade dos equipamentos e o reforço da fiabilidade operacional da frota mineira.
Industrial maintenance plays an essential role in ensuring the availability and reliability of equipment, especially in demanding contexts such as the construction and mining sector. This research was developed as part of a curricular internship carried out at the engineering and construction company Mota-Engil and aimed to analyze and optimize the maintenance operations of two categories of heavy mining equipment, hydraulic excavators and off highway trucks, used in a project in Moatize, Mozambique. To achieve this, an exploratory and descriptive research methodology was adopted, supported by the evaluation of historical maintenance data provided by the company. The analyses carried out included the study of costs and frequency of both preventive and corrective interventions, the validation of the compliance of the preventive maintenance plans with the manufacturer's recommendations, the identification of the most critical systems through Pareto analysis, the classification of the most frequent failures in these systems, and the evaluation of equipment performance indicators. The results revealed a high rate of corrective maintenance, particularly in the hydraulic systems of the excavators and the rear tires of the trucks. It was also found that the maintenance orders often lacked important information, especially regarding the description of failures, which was a limitation for the technical analysis of events. Based on the conclusions reached, a set of improvement actions was proposed, aiming to reduce maintenance costs, increase equipment availability, and enhance the operational reliability of the mining fleet.
Industrial maintenance plays an essential role in ensuring the availability and reliability of equipment, especially in demanding contexts such as the construction and mining sector. This research was developed as part of a curricular internship carried out at the engineering and construction company Mota-Engil and aimed to analyze and optimize the maintenance operations of two categories of heavy mining equipment, hydraulic excavators and off highway trucks, used in a project in Moatize, Mozambique. To achieve this, an exploratory and descriptive research methodology was adopted, supported by the evaluation of historical maintenance data provided by the company. The analyses carried out included the study of costs and frequency of both preventive and corrective interventions, the validation of the compliance of the preventive maintenance plans with the manufacturer's recommendations, the identification of the most critical systems through Pareto analysis, the classification of the most frequent failures in these systems, and the evaluation of equipment performance indicators. The results revealed a high rate of corrective maintenance, particularly in the hydraulic systems of the excavators and the rear tires of the trucks. It was also found that the maintenance orders often lacked important information, especially regarding the description of failures, which was a limitation for the technical analysis of events. Based on the conclusions reached, a set of improvement actions was proposed, aiming to reduce maintenance costs, increase equipment availability, and enhance the operational reliability of the mining fleet.
Description
Keywords
Maintenance Maintenance Management Preventive Maintenance KPI Equipment Mining Manutenção Gestão da manutenção Manutenção preventiva Equipamentos Mineração