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Soldadura por pontos a laser por transmissão para PMMA, PVC
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ISBN10: 6206763501
ISBN13: 9786206763505
Publisher: Edicoes Nosso Conhecimento
Published: Apr 28 2025
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786206763505
Publisher: Edicoes Nosso Conhecimento
Published: Apr 28 2025
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Portuguese
A soldadura por pontos a laser por transmissão é uma tecnologia de soldadura importante devido à sua ampla utilização no campo da soldadura. Foi utilizada uma máquina laser CNC 3D com um laser de dÃodo de 1064 nm. Foram soldados dois tipos de polÃmeros (PMMA e PVC) para diferentes (espessuras, tempo de soldadura a laser e pressão de aperto dos espécimes) a uma potência laser de 3,29 W. Foi efectuada a varredura por espetroscopia de infravermelhos com transformada de Fourier e transparência para cada polÃmero. A resistência à tração e o exame da microestrutura para cada ponto de soldadura foram examinados. Observa-se que o melhor tempo de soldadura a laser para todas as peças soldadas foi de 5 segundos para as peças investigadas. O processo de soldadura dos grupos de PMMA foi realizado. Observou-se que a força de soldadura aumentou com o aumento do tempo de laser e da pressão de aperto até (5 segundos, 5 bar), respetivamente. Para 2,50 mm de espessura, as melhores condições para o tempo de soldadura a laser e a pressão de aperto foram (4 seg. e 5 bar), respetivamente. Enquanto que para 6,00 mm de espessura, a melhor condição para o tempo de soldadura a laser e a pressão de aperto foi (5 seg. e 5 bar), respetivamente. Foram obtidos resultados semelhantes para grupos de PVC com espessuras de (1,00 e 0,70) mm.
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