Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/12621
Título: | Effect of LBM and large-area EBM finishing on micro-injection moulding surfaces |
Autor(es): | Selada, Antonio Manaia, Ana Vieira, Maria Teresa Pouzada, A. S. |
Palavras-chave: | Laser machining Electron beam machining Roughness Surface integrity |
Data: | 2011 |
Editora: | Springer Verlag |
Revista: | The International Journal of Advanced Manufacturing Technology |
Resumo(s): | Micro-injection moulding is an efficient process for large series production of thermoplastic polymer microparts. The moulding surface quality in the moulds is important and determines the manufacturing specifications for a given micro-engineering component. In this study, melting and vaporisation removal technologies were analysed: laser beam machining (LBM) as the material removal technique and electron beam machining (EBM) as the finishing process. Stainless steel DIN X42Cr13 was used for machining 10×10 mm2 flat surfaces. LBM parameters, namely intensity, frequency, cutting depth, scanning speed and hatching, and EBM conditions, as energy density, number of irradiation and frequency, were varied. The surface topography and integrity and the micro-structure were characterised by optical and electronic microscopy, roughness profilometry, X-ray spectroscopy and micro- and ultrahardness tests. It was shown that the combination of LBM and large-area EBM is an interesting alternative to polishing by hand lapping of moulding surfaces for micromoulding, improving surface roughness and surface integrity without cracks and smaller HAZ. The morphology analysis demonstrated that EBM finishing improves corrosion and oxidation resistance compared with conventional heat treated surfaces. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/12621 |
DOI: | 10.1007/s00170-010-2723-2 |
ISSN: | 0268-3768 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Selada A 2010 print.pdf Acesso restrito! | 955,35 kB | Adobe PDF | Ver/Abrir |