Análise do processo de fresamento de MDF em centro de usinagem CNC

• Ano de defesa: 2015
• Autor(a) principal: Deus, Priscila Roel de [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Painéis de madeira; Microscopia eletronica de varredura; Aspereza de superfície; Chapa de madeira aglomerada; Usinagem; Paneling
• Link de acesso: http://hdl.handle.net/11449/123323; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/04-05-2015/000825556.pdf

The MDF (medium density fiberboard) is an industrial product manufactured from lignocellulosic fibers. It is quite a material used because it presents homogeneity, dimensional stability and mechanical strength next to solid wood. Milling is a machining method widely used in the furniture industry; despite the remarkable relevance of the subject there are few works dealing with the specific MDF milling process using Computerized Numerical Control (CNC) machines. The objective of this study is to evaluate the MDF milling in CNC machining center by analyzing roughness, power consumption and surface image analysis. The MDF panels were concordant direction with the machined depth of cut of 0.5; 1 to 1.5 mm and the discordant direction with depth of cut of 3; 6 and 9 mm. Both of six replicates, four cutting speed 804 m/min 630 m/min 402 m/min and 201 m/min and three forward speeds 6, 4 and 2 m/min in all tests and in the tangential direction and front. Analyzed the parameter of roughness average (Ra) and roughness total (Rt), the power consumed and the integrity of parts on scanning electron microscopy and topography. It was observed that the surface roughness showed lower values for the cutting speeds of 603 and 804 m / min, feed rate between 2 and 4 m / min. The depth of cut of 1 mm and 1.5 mm in tangential and 3 exhibited satisfactory results for front surface. It was concluded that the parameters studied here significantly influence the finish, resulting in uneven surfaces that can reduce the quality of products. The objecting tangential milling presents with low roughness values, that is more satisfactory