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Advisor(s)
Abstract(s)
A vantagem competitiva de uma empresa baseia-se em equipamentos sofisticados com
tecnologia de ponta, que proporcione aos clientes produtos de alta qualidade no prazo
estabelecido, com redução substancial dos recursos utilizados e desperdícios. Com o
desenvolvimento das tecnologias CNC, a linha de produção veio a ser enriquecida e aprimorada
e este naturalmente reflete-se na qualidade e produtividade do produto acabado. Com finalidade
de contribuir para o enriquecimento da informação nesta área e complementar minha formação
foi efetuado o presente trabalho. Neste, são abordados os principais conceitos e definições do
corte por arranque de apara, particularmente incluídas no tornamento CNC. Foram revistas os
conceitos relativos aos parâmetros de corte e do comando SSV no torneamento com intuito de
investigar as influências no acabamento das peças, medidas através da rugosidade que daí
resulta.
O procedimento do trabalho constituiu, em primeiro lugar, em avaliar os parâmetros de corte
no torneamento e das respetivas medições das rugosidades, em cada experiência. Seguiu-se a
comparação de quais apresentam melhores resultados para se obter um bom acabamento
superficial das peças. Um caso especial do estudo foi o da aplicação do comando SSV nas
amostras. Numa primeira análise, verificou-se que, de modo convencional, não se iriam obter
grandes conclusões, uma vez que o acabamento depende em simultâneo, de várias variáveis.
Então optou-se pela análise estatística, recorrendo-se à análise de variância, ANOVA, e ao teste
de Tukey. Os estudos efetuados foram conclusivos relativamente a velocidade de corte, ao
avanço, à ferramenta e o uso do SSV no acabamento das peças.
O estudo complementar de torneamento baseado no CAD/CAM, inicialmente proposto, foi
efetuado relativamente a uma peça simples. Foram efetuadas simulações para avaliar a
influência das estratégias de tornamento, disponíveis no software Mastercam, no acabamento e
na produtividade.
ABSTRACT: The competitive advantage of a company is based on sophisticated equipment with state-of the-art technology, which provides customers with high quality products on time, with a substantial reduction in resources used and waste. With the development of CNC technologies, the production line has been enriched and improved and this naturally reflects on the quality and productivity of the finished product. In order to contribute to the enrichment of information in this area and complement my instruction, the present work was carried out. In this one, the main concepts and definitions of the chip start cutting are discussed, particularly included in CNC turning. The concepts related to the cutting parameters and the SSV command in turning were reviewed in order to investigate the influences on the finishing of the parts, measured through the resulting roughness. The work procedure consisted, in the first place, in evaluating the cutting parameters in the turning and the respective measurements of the roughness, in each experiment. It was followed by the comparison of which ones present better results to obtain a good surface finish of the parts. A special case of the study was the application of the SSV command in the samples. In a first analysis, it was verified that, in a conventional way, great conclusions would not be obtained, since the finish depends simultaneously on several variables. Then we opted for statistical analysis, using analysis of variance, ANOVA, and Tukey's test. The studies carried out were conclusive regarding the cutting speed, the feed, the tool and the use of SSV in the finishing of the parts. The complementary study of turning based on CAD/CAM, initially proposed, was carried out in relation to a single part. Simulations were carried out to evaluate the influence of turning strategies, available in the Mastercam software, on finishing and productivity.
ABSTRACT: The competitive advantage of a company is based on sophisticated equipment with state-of the-art technology, which provides customers with high quality products on time, with a substantial reduction in resources used and waste. With the development of CNC technologies, the production line has been enriched and improved and this naturally reflects on the quality and productivity of the finished product. In order to contribute to the enrichment of information in this area and complement my instruction, the present work was carried out. In this one, the main concepts and definitions of the chip start cutting are discussed, particularly included in CNC turning. The concepts related to the cutting parameters and the SSV command in turning were reviewed in order to investigate the influences on the finishing of the parts, measured through the resulting roughness. The work procedure consisted, in the first place, in evaluating the cutting parameters in the turning and the respective measurements of the roughness, in each experiment. It was followed by the comparison of which ones present better results to obtain a good surface finish of the parts. A special case of the study was the application of the SSV command in the samples. In a first analysis, it was verified that, in a conventional way, great conclusions would not be obtained, since the finish depends simultaneously on several variables. Then we opted for statistical analysis, using analysis of variance, ANOVA, and Tukey's test. The studies carried out were conclusive regarding the cutting speed, the feed, the tool and the use of SSV in the finishing of the parts. The complementary study of turning based on CAD/CAM, initially proposed, was carried out in relation to a single part. Simulations were carried out to evaluate the influence of turning strategies, available in the Mastercam software, on finishing and productivity.
Description
Keywords
Torno CNC Parâmetros de Corte Rugosidade Mastercam