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Usinagem Criogénica de Ligas de AlumÃnio e seus Compostos
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ISBN10: 6205807181
ISBN13: 9786205807187
Publisher: Edicoes Nosso Conhecimento
Published: Mar 19 2023
Pages: 144
Weight: 0.49
Height: 0.34 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786205807187
Publisher: Edicoes Nosso Conhecimento
Published: Mar 19 2023
Pages: 144
Weight: 0.49
Height: 0.34 Width: 6.00 Depth: 9.00
Language: Portuguese
Um grande problema na indústria de maquinagem é o aumento da temperatura que afecta a qualidade e o custo de produção. O aumento da temperatura de corte provoca desvios nas dimensões, integridade da superfÃcie e vida útil da ferramenta de corte. Também causa micro fissuras superficiais e sub-superficiais, e rápida oxidação e corrosão. A utilização de refrigerantes convencionais não é eficaz na redução da temperatura de corte e do desgaste da ferramenta. Além disso, tem limitações em termos de poluição e aumento dos custos de manuseamento e eliminação. Neste contexto, a maquinagem criogénica tornou-se um dos métodos alternativos, para controlar a temperatura de corte e o desgaste das ferramentas. Neste livro, foi investigado o sistema de arrefecimento criogénico para maquinação. As experiências de torneamento foram realizadas com três peças de trabalho diferentes, tais como 7075 Al alloy, LM13 e LM28 compósitos com pastilhas não revestidas de carboneto de tungsténio sob ambientes húmidos e criogénicos de maquinação LN2. Pode-se concluir que a maquinagem com o arrefecimento criogénico do LN2 tem benefÃcios substanciais no que diz respeito à temperatura de corte, forças de corte, espessura da apara e a sua morfologia, rugosidade superficial, e desgaste da ferramenta quando comparada com a maquinagem a húmido.
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