Efeitos da granulometria, do desgaste e do tipo de material abrasivo no lixamento plano de madeiras

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Varasquim, Francisco Mateus Faria de Almeida [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/111072
Resumo: The sanding process is indispensable for situations where the manufacturing processes were not sufficient to ensure the final dimensions or when the desired surface quality was not achieved. This process is frequently used in panels and furniture industries, however, is almost always used empirically, without the proper knowledge. In the present study we analyzed the influence of particle size, abrasive wear and the abrasive type on Corymbia citriodora and Pinus elliottii sanding. The objective was to study and understand the correlation between the input factors (particle size, abrasive wear, abrasive type) on the output variables (power sanding, acoustic emission, vibration, roughness and surface integrity) in sanding process. The system developed and used consists of a flat sander, a data acquisition system and an electromechanical testing system with pneumatic actuation. It was used three particle sizes (80, 100 and 120 mesh), three types of grain abrasives (aluminum oxide, silicon carbide and zirconium oxide), three levels of abrasive wear (no wear, intermediate wear, severe wear) and two species of wood for the analysis, it was made six replications for each test configuration, totaling 324. The results were statistically analyzed using variance analysis (ANOVA) with a significance level of 5%, followed by the Tukey test, which compares the variations in pairs. The electromechanical testing system designed sanding proved to be very efficient in data acquisition. The abrasive wear influenced significantly roughness in both species and all abrasive grains types. The variables that wear influenced less were acoustic emission and vibration. The best values of roughness were obtained for aluminum oxide grains and the worst for silicon carbide grains. The SEM images and topography were important to understand the interaction of the abrasive grain with wood surface