Projeto, construção e avaliação de um dinamômetro para a medição das componentes da força de usinagem no torneamento
Machining is a manufacturing process that plays an important role in the industry, with the turning operation as one of its protagonists. Thus, it is important to perform studies that helps to understand and, consequently, optimize it. In this context, the knowledge of the machining force compone...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/54704 |
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| Resumo: | Machining is a manufacturing process that plays an important role in the
industry, with the turning operation as one of its protagonists. Thus, it is important
to perform studies that helps to understand and, consequently, optimize it. In this
context, the knowledge of the machining force components in turning is essential to
define the best parameters to increase the productivity and reduce the costs. Thus,
the measurement of machining force components using piezoelectric
dynamometers has been widely used. However, such devices have a high initial
price, which often becomes prohibitive for many research laboratories. In this
context, this work presents a proposal of a dynamometer able to measure the
components of the machining force in turning using uniaxial load cells based on
strain gauge transducers, which are usually cheaper than piezoelectric load cells.
The proposed instrument was statically calibrated in a universal testing machine
from 0 to 1,5 kN and presented metrological characteristics, such as a linearity of
99.3%, 98.14% and 94.8% in the cutting, feed and radial directions, respectively.
Furthermore, the use of a calibration matrix reduced the cross sensitivity from 44%
to 3%. Finally, turning tests were performed under different cutting conditions to
evaluate the functionality of the instrument, forces up to 252 N, 162 N and 141 N
were obtained for cutting, feed and thrust forces, respectively; like previous works. |
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