Avaliação Da Produtividade Do Processo De Soldagem Mag Por Simulação Com O Método De Hipercubo Latino

Martins, José Luiz

doi:10.22409/engevista.v15i1.417

Cited by 2 publications

(8 citation statements)

References 7 publications

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“…These results were not expected. It showed that the lower the diameter, the higher the level of challenge of execution of a welded joint (Martins, 2011; PROMINP, 2009). There are no evidences in this study that explain these occurrences.…”

Section: Resultsmentioning

confidence: 99%

“…Some improvements were expected, at least from the tenth day onwards. This is because of the familiarisation of workers with the environment and working conditions (Martins, 2011; PROMINP, 2009; Pellegrino et al. , 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Productivity is expressed in cm³/Mh (Ney, 2016; Lobato, 2015; Gioia, 2015; Tabim, 2013; PROMINP, 2009, 2010). Notably, the performance of welders in the Brazilian industry reaches a level of normality 10 days after the beginning of their activities (Martins, 2011; PROMINP, 2009). Because welders were hired on random dates and they welded on different days, the productivity data collected were aligned on the timeline as follows: the first welding day of each welder was grouped as “DAY 1” and the second day as “DAY 2”.…”

Section: Methodsmentioning

confidence: 99%

“…It is important to highlight that in most situations, productivity is related to the individual skills of welders during welding. Considering this aspect, Martins (2011) and PROMINP (2009) established that the performance of welders in the Brazilian industry of construction of industrial plants reaches the expected level from the tenth day of the start of activities at the construction site. It is believed that this phenomenon is related to the adaptation of welders to the environment and working conditions of the construction site.…”

Section: Literature Reviewmentioning

confidence: 99%

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Welder learning curves behaviour: “focus on welding productivity with the TIG process of marine platforms stainless steel pipes”

Macedo

Ferreira

2021

ECAM

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PurposeThe purpose of the study is to analyse the feasibility of using the potential and exponential curve models to assess the learning of a group of welders, when welding stainless steel piping with the tungsten inert gas process.Design/methodology/approachThe welding productivity data grouped according to the requirements of the ASME SECTION IX code is organised into two groups: average productivity and baseline productivity. When processing the adjustment to the two models, the Excel software Solver tool was used. The criteria for assessing the quality of the fit were: least squared method, Spearman's correlation coefficient and graphical method. The impact of the variation coefficient on the average productivity and the amplitude (difference between the minimum and maximum productivity) was also evaluated on the baseline productivity.FindingsThe curves elaborated based on the average productivity presented better quality of adjustment than those constructed from the baseline productivity. The potential and exponential models presented similar adjustment conditions, with the second having a slightly superior performance. There were no productivity gains due to learning in the studied time interval. The grouping of the average daily productivity data based on the diameter range established in the ASME code section IX presented satisfactory results, enabling its use by the industry.Originality/valueThere is no news of work on piping welding with this focus. The proposal to group the productivity data according to the degree of difficulty of execution established by the ASME code section IX, widely used in the industry, is a significant contribution to monitoring the evolution of learning. In the same way, the results allow to adopt the average productivity determined from the first 20 days of realisation of a project, as a reasonable indicator to estimate the future performance of the work, helping to correct deadlines during the realisation of a project.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Welder learning curves behaviour: “focus on welding productivity with the TIG process of marine platforms stainless steel pipes”

Macedo

Ferreira

2021

ECAM

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“…Os ambientes de desenvolvimento de modelos de simulação a eventos discretos podem ser definidos como ferramentas computacionais que auxiliam a análise de problemas, que vão de logística e manufatura até redes de computadores, sem recorrer a modelos analíticos de teoria das filas (Peixoto et al, 2013); (Martins, 2013).…”

Section: Introductionunclassified

Simulação Computacional Aplicada À Modelagem Do Processo De Recebimento De Uniformes Na Marinha Do Brasil

Gomes¹,

Praia²

2014

Engevista

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RESUMO:A Marinha do Brasil procura fazer que as atividades de apoio estejam sempre alinhadas com os objetivos da instituição, ao avaliar constantemente a possibilidade de emprego das melhores técnicas de gestão nas organizações militares. O propósito deste artigo é procurar uma nova proposta de melhoria em um processo logístico na MB, concentrando esforço no estudo da teoria das filas e da simulação. Para isso, é utilizada simulação computacional no processo de recebimento de uniformes, de modo a auxiliar na identificação de gargalos no fluxo de material do Sistema de Abastecimento da Marinha e no melhor uso dos recursos operacionais necessários à execução das atividades logísticas. O emprego de tais técnicas da pesquisa operacional justifica-se pela capacidade de permitir uma adequada análise dos diferentes cenários e políticas operacionais, bem como, uma correta avaliação de cada ponto crítico do sistema real. Os resultados das simulações mostraram que a diminuição do tempo de uma etapa provocava aumento da fila na etapa seguinte. Concluiu-se, então, que o aumento da capacidade do sistema deveria ser aplicado sempre nos pontos de restrição e repetido até alcançar a capacidade e o tempo de processamento desejado. PALAVRAS CHAVE: simulação computacional, uniformes, Marinha do Brasil.The Navy of Brazil seeks to support activities are always aligned with the goals of the institution, to constantly evaluate the possibility of using the best techniques of management in military organizations. The purpose of this article is look for a new proposal to improve logistics in a process in MB, concentrating efforts in the study of queuing theory and simulation. For this, computer simulation is used in the process of receiving uniforms in order to assist in identifying bottlenecks in the flow of material from the Navy Supply System and the better use of operational resources needed to implement its logistics activities. The use of such operational research techniques is justified by its ability to allow a proper analysis of different scenarios and operational policies as well, an accurate evaluation of each critical point of the real system. Simulation results showed that decreasing the time step caused an increase in the queue the next step. Thus, it was concluded that the increased capacity of the system should be always applied at the point of restriction and repeated to reach the capacity and the desired processing time.

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Avaliação Da Produtividade Do Processo De Soldagem Mag Por Simulação Com O Método De Hipercubo Latino

Cited by 2 publications

References 7 publications

Welder learning curves behaviour: “focus on welding productivity with the TIG process of marine platforms stainless steel pipes”

Welder learning curves behaviour: “focus on welding productivity with the TIG process of marine platforms stainless steel pipes”

Simulação Computacional Aplicada À Modelagem Do Processo De Recebimento De Uniformes Na Marinha Do Brasil

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