Avaliação da madeira de clones de Toona ciliata pela análise da superfície usinada

Abstract

The application and costs of wood milled products depends of the desired degree of quality of the product. The furniture market is an example of this, because the value increases according to the quality of the product. Wood is a heterogeneous and anisotropic material, what is responsible for special conditions of manufacturing needs. The wood behavior on machining process is an important parameter to characterization and adequate application of each wood specie. The main goal of this research was to evaluate wood surface quality of Toona Ciliata Var. australis clones, as well as to determinate potentiality of applications after machining process, and define the best clone among the evaluated material. We have selected thirty-five trees (7 clones x 5 samples), and from each tree, we cut logs of 1m length s (0,3 a 1,3m tree height) to made timber board to analysis. Air drying were performed until equilibrium moisture content (EMC). The boards machining cutting were made on feed rates of 6 m.min -1 and 30 m.min -1. The evaluations of wood surface qualities were done according to the technical norm ASTM D-1666/11. Roughness test were performed on a Taylor Hobson Surtronic S116. Among the seven clones, the encoded as FE presented best potentiality of machining surface quality, and, in general, high rates of advancement result in reduction of surface quality.