Sunset laser na análise de defeitos em madeiras usinadas

Abstract

The qualification of the machined surface serves to indicate appropriate uses for wood. The search for methods capable of qualifying the machined surface and which possess character of repeatability and reproducibility has grown in the furniture sector. Thus, the objectives of this study were to develop and test surfaces qualification techniques, by measuring defects using the sunset laser technique, comparing them with the feeding per tooth and with the visual qualification of machined surfaces norm - ASTM D 1666-11 (2011). To do this, we used a plane trowel with different feeding rates in order to produce all classes of machined surface defects. We observed a strong relation between the defect area, illuminated by the sunset laser, and the grades attributed by the visual evaluation (R² = 0.861), as well as between the defect area and the measured feeding per tooth (R² = 0.878). We concluded that the sunset laser technique is capable of qualifying the machined surface, being more efficient then the visual qualification in classifying the samples, especially those classified with successive grades.