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Abstract(s)
Uma das principais desvantagens da maquinaria CNC é o seu elevado custo operacional,
porém este valor pode aumentar exponencialmente caso os parâmetros de corte não
sejam os ideais.
Neste trabalho são estudados os parâmetros de corte (velocidade de corte, velocidade de
avanço, penetração radial e penetração axial) e o efeito que estes parâmetros têm na
rugosidade superficial e na taxa de remoção de material durante a fresagem de uma liga
de alumínio AL7050. Para tal análise foi maquinado um provete a partir de um bloco de
alumínio da liga estudada. Neste provete foram testadas duas séries de dezasseis ensaios.
Nestes ensaios foi utilizado o método de Taguchi, em que foi construída uma matriz
ortogonal L16 e foram definidos quatro níveis para cada parâmetro. Também foi
registada a rugosidade media das superfícies horizontal e lateral, alem da taxa de
remoção de material. A partir da matriz ortogonal criada foi possível criar uma análise
de variação ANOVA, que consiste em três gráficos: gráfico de efeitos principais na
rugosidade da superfície horizontal, gráficos de efeitos principais na rugosidade da
superfície lateral, e o gráfico de efeitos principais na taxa de remoção de material.
Podendo assim tirar conclusões sobre os efeitos dos parâmetros de corte na liga de
alumínio AL7050.
One of the main disadvantages of CNC machinery is its high operating cost, but this value can increase exponentially if the cutting parameters are not ideal. In this work, the cutting parameters (cutting speed, feed rate, radial penetration, and axial penetration) and the effect these parameters have on the surface roughness and material removal rate during the milling of an AL7050 aluminum alloy were studied. For this analysis, a specimen was machined from an aluminum block of the studied alloy. In this specimen, two series of sixteen tests were tested. Through the test piece, the Taguchi method was used, in which an L16 orthogonal matrix was built and four levels were defined for each parameter. The average roughness of the horizontal and lateral surfaces was also recorded, as well as the material removal rate. From the orthogonal matrix created, it was possible to create an analysis variation ANOVA, that consists of three graphs: main effect graph on horizontal surface roughness, main effect graph on lateral surface roughness, and the main effect graph on material removal rate. Thus, being able to draw conclusions about the effects of the cutting parameters in the aluminum alloy AL7050.
One of the main disadvantages of CNC machinery is its high operating cost, but this value can increase exponentially if the cutting parameters are not ideal. In this work, the cutting parameters (cutting speed, feed rate, radial penetration, and axial penetration) and the effect these parameters have on the surface roughness and material removal rate during the milling of an AL7050 aluminum alloy were studied. For this analysis, a specimen was machined from an aluminum block of the studied alloy. In this specimen, two series of sixteen tests were tested. Through the test piece, the Taguchi method was used, in which an L16 orthogonal matrix was built and four levels were defined for each parameter. The average roughness of the horizontal and lateral surfaces was also recorded, as well as the material removal rate. From the orthogonal matrix created, it was possible to create an analysis variation ANOVA, that consists of three graphs: main effect graph on horizontal surface roughness, main effect graph on lateral surface roughness, and the main effect graph on material removal rate. Thus, being able to draw conclusions about the effects of the cutting parameters in the aluminum alloy AL7050.
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Keywords
Analise Anova. Fresagem Método de Taguchi Parâmetros de Corte Rugosidade da Superfície Taxa de Remoção de Material