Mestrado em Engenharia de Produção

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Navegando Mestrado em Engenharia de Produção por Assunto "Aluminum 7075-T6"

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    Análise numérica-experimental da força de corte na usinagem de uma liga de alumínio 7075-T6
    (Universidade Federal de Goiás, 2019-09-20) Ramaldes, Leandro de Lima; Resende, André Alves de; http://lattes.cnpq.br/3492793149542286; Guimarães, Marco Paulo; http://lattes.cnpq.br/4547166859048137; Guimarães, Marco Paulo; Resende, André Alves de; Moura, Ricardo Ribeiro; Silva, Wellington Andrade da
    Chip formation is linked to various machining parameters that directly affect the cutting forces, shear stresses, power and temperatures associated with the machining process. Chip formation mechanisms have been studied for over 100 years and because they involve high temperatures and high deformation rates, there is some difficulty in accurately predicting a mathematical model to describe the formation of this phenomenon, considering the various types of materials available. Efforts during the cutting process are important elements for tool manufacturers and industry consumers. By predicting the stress values during a machining process, you can optimize the manufacture of the consumable, avoiding unexpected stops for tool change, for example. This paper presents the results of experiments in the process of orthogonal bedame turning in a 7075-T6 aluminum alloy with variations in cutting speed and cutting feed rates. The tests were performed using carbide tool MGMN 300-M-H01 - CLASS N and the shear force (Fc) values were collected with a load cell data acquisition system and a data acquisition plate. . Numerical simulations were also performed by the finite element method using Ansys ® software in its explicit dynamic module, simulating the value of the shear force (Fc) during the machining process. Twenty simulations were performed with a fixed hexahedral mesh containing 24021 nodes and 20600 elements. In the numerical simulation by the finiteelement method an increase in the cutting force (Fc) was observed when the cutting speed was reduced, and an increase in the cutting force when there was an increase in the depth of cut and the cutting feed respectively. In the experimental tests obtained the same results trends found in the simulation. These results are important to contribute to the knowledge of the numerical simulation turning process, allowing cost reductions and better performance in the manufacturing process. This enables the definition of a method that will predict the cutting force employed in the process, contributing satisfactorily to the quality, wear and precision of the manufacturing process.