CHARACTERIZATION OF WOOD PIECES PRODUCED IN SAWMILL FOR QUALITY CONTROL
DOI:
https://doi.org/10.5902/19805098328Keywords:
Pinus spp., mechanical processing, quality control.Abstract
The performance of the saw to produce wood pieces can be measured by the precision of the pieces dimensions. An study was carried out in Cachoeira do Sul, RS, to quantify the mean and the variance of the wood pieces produced in a sawmill. The wood pieces produced by four kind of machine were evaluated. Two machine bandsaw with two saws: a twin bandsaw and a double circular saw headriss produce centered cants. The depth of the pieces was determined by two other machines, with multiple circular saw. The average, variances and the confidence interval was calculated to average and within piece variance produced by the four machine and between piece variance. The results show that the sawn wood pieces folow a normal distribution without tendency.
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References
BRAVO, P.C. Controle Estatístico da Qualidade In: REUNIÃO ANUAL BRASILEIRA DA SOCIEDADE INTERNACIONAL DE BIOMETRIA, 40a E SIMPÓSIO DE ESTATÍSTICA APLICADA À EXPERIMENTAÇÃO AGRONÔMICA, 6o , Ribeirão Preto, 1995. Minicursos. Ribeirão Preto: USP, 1995.
NOCK, H. P., RICHTER, H. G. Tópicos de Tecnologia da Madeira - Controle de Qualidade na Indústria Madeireira. Curitiba: UFPr-Curso de Pós-Graduação em Engenharia Florestal, 1979.
PONCE, R. H. Tecnologia de Desdobro de Pinus e Eucalyptus: a busca da competitividade In: SIMPÓSIO FLORESTAL DO RIO GRANDE DO SUL. Porto Alegre: Ageflor, 1992.
PONCE, R. H. Novas Tecnologias de Desdobro e Beneficiamento de Madeira: a busca da competitividade In: ANAIS DO 7O CONGRESSO FLORESTAL BRASILEIRO. Curitiba: SBS e SBEF, 1993. p 310-314.
STEEL, R.G.D., TORRIE, J.H. Principles and procedures of statistics. Nova York: McGraw Hill Book, 1960. 481p.