Maintenance is considered a critical factor in the most diverse fields and is associated with several techniques. Among the existing preventive techniques, the lubrication plan guarantees a good operability of the components. The present study was carried out in a soy processing agribusiness located in the Southwest of the State of Goiás, Brazil, in which a device lubrication plan was identified and proposed. In addition, a survey was prepared between the number of grease applications, the amount of applied grease (g) and temperature (°C) of the components (bearings), and a multivariate regression model was suggested. The study was carried out from the monitoring of the work routines of the maintenance sector in a soy storage line, with the aid of a FLIR thermographic camera model E8. The proposal implemented in the study was able to reduce the costs of man-hours and consumables, and improve the reliability of equipment by the temperature indicator (°C).
Modificações em processos produtivos são vitais para as organizações obterem vantagens frentes aos seus concorrentes e reduzir custos, sem a perca da qualidade de seus produtos. Assim, o presente trabalho tem como objetivo identificar a possibilidade de redução de operadores em uma linha de produção. Para o desenvolvimento do estudo foi utilizado o setor de empacotamento de farinha de milho, onde foi aplicado um método de distribuição de probabilidades que usou como parâmetros a relação entre paradas indesejadas, seus efeitos e a variação no custo unitário de produção. O levantamento dos dados ocorreu durante o período de um mês, onde foram coletados indicadores de custos unitários de produção, quantidade de operários, quantidade de máquinas, total de hora disponível para operar e total de hora parada por máquina. Ao implantar o método de distribuição por probabilidades foram obtidos resultados favoráveis para uma redução de operadores, visto que atuando com nove operadores o custo unitário de pacotes produzidos foi aproximadamente 0,21 reais, enquanto que com cinco operadores o valor foi aproximadamente 0,17 reais por unidade de pacote produzido, sem alterar a quantidade de produtos. Em virtude do que foi mencionado, conclui-se a viabilidade de redução de nove operadores para cinco. A empresa ganhará com a redução de funcionários, uma vez que os ganhos priorizam as perdas devido à redução nas taxas de produção.
Many mechanical equipment, when performing their functions, generate some type of noise. These noises can be mechanical vibrations, represented by speeds, accelerations and displacements. In most structures, these vibrations are considered unwanted. However, it is worth mentioning that, in some applications, they are necessary to maintain the proper functioning of machines and equipment, such as impact drills and compressor rollers. In order to represent experimental physical models numerically, it is common to use computer software that simulates their dynamic behavior. This helps to predict project failures and prevent accidents, saving time and, consequently, money. In this work, an analysis of the dynamic behavior of a system under impact suppression was performed. The variation parameter used was the excitation frequency, and according to the studied parameters, a chaotic behavior of the structure was noted. Therefore, in order to mitigate this chaotic behavior, an optimal linear control project (LQR) was developed, and its implementation was presented efficiently, reducing the amplitude of the response parameters, and minimizing the chaotic trajectories of the structure.
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