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Contributo para o projeto de matrizes de extrusão de alumínio baseado na análise de conformidade de perfis extrudidos
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No decorrer da colaboração profissional com uma fábrica dedicada à produção de
matrizes para a extrusão de alumínio, surgiu a oportunidade de criar um método que previsse a
dificuldade de uma extrusão consoante as características do perfil a ser extrudido.
Para a criação do método foi analisada a informação da adequação de uma nova matriz
ao perfil especificado no projeto, consubstanciada numa amostra de 962 relatórios de
conformidade de perfis previamente extrudidos, que corresponde a 11 anos de atividade da
fábrica. Durante o levantamento e tratamento dos dados recolhidos houve a necessidade de
caracterizar e diferenciar as matrizes e respetivos perfis contidos nos relatórios. De forma a
colmatar esta necessidade foi usada uma metodologia que consistiu em definir um fator de
complexidade que se pudesse atribuir a cada perfil analisado. Esse fator de complexidade foi
definido usando um conjunto de critérios advindos de recomendações existentes sobre o projeto
de perfis.
Após a análise da amostra de relatórios em questão estabeleceram-se relações entre as
características dos perfis e a sua influência no produto extrudido final. Os resultados obtidos
apresentaram uma boa correlação e permitiram extrair conclusões. É possível verificar a
correlação entre o número de alterações da matriz e a complexidade do perfil.
As conclusões a que se chegou neste trabalho parecem interessantes e com utilidade
prática, que merecem continuação em trabalhos futuros, para uma melhor definição do fator de
complexidade.
In the course of the professional collaboration with a factory dedicated to the production of aluminum extrusion dies, the opportunity arose to create a method that predicted the difficulty of an extrusion depending on the characteristics of the profile to be extruded. For the creation of the method, the information on the adequacy of a new die to the profile specified in the project was analyzed, based on a sample of 962 previous extruded profiles compliance reports corresponding to 11 years of factory activity. During the survey and treatment of the collected data there was a need to characterize and differentiate the dies, and respective profiles, contained in the reports. In order to meet this need, a methodology was used, which consisted in defining a complexity factor that could be attributed to each analyzed profile. This complexity factor was defined using a set of criteria derived from existing recommendations on profile design. After analyzing the sample of reports in study, relations were established between the characteristics of the profiles and their influence on the final extruded product. The results obtained showed a good correlation and allowed conclusions to be drawn. It´s possible to verify the correlation between the number of die changes and the complexity of the profile. The conclusions reached in this work seem interesting and of practical use, which deserve further work in order to better define the complexity factor.
In the course of the professional collaboration with a factory dedicated to the production of aluminum extrusion dies, the opportunity arose to create a method that predicted the difficulty of an extrusion depending on the characteristics of the profile to be extruded. For the creation of the method, the information on the adequacy of a new die to the profile specified in the project was analyzed, based on a sample of 962 previous extruded profiles compliance reports corresponding to 11 years of factory activity. During the survey and treatment of the collected data there was a need to characterize and differentiate the dies, and respective profiles, contained in the reports. In order to meet this need, a methodology was used, which consisted in defining a complexity factor that could be attributed to each analyzed profile. This complexity factor was defined using a set of criteria derived from existing recommendations on profile design. After analyzing the sample of reports in study, relations were established between the characteristics of the profiles and their influence on the final extruded product. The results obtained showed a good correlation and allowed conclusions to be drawn. It´s possible to verify the correlation between the number of die changes and the complexity of the profile. The conclusions reached in this work seem interesting and of practical use, which deserve further work in order to better define the complexity factor.
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Extrusão de alumínio Projeto de matrizes Qualidade da extrusão