Efeito da geometria dos dentes da serra de fita na produ??o de madeira serrada de eucalipto

摘要

The objective of this work was to determine the effect of band saw teeth parameters on the production and quality of eucalyptus sawed wood. The effect of two tooth pitches (57.15 mm and variable pitch: 50.8 - 50.8 - 50.39 - 50.71 - 60.03 - 60.35 mm), two hook angles (26 and 270) and two gullet depths (22 and 25.4 mm) on eucalyptus sawed wood was evaluated. Ten 15-year-old logs of Eucalyptus grandis x Eucalyptus urophylla clones were used. Logs were classified in two diameter classes with five logs displaying diameter between 25 to 34 cm and other five logs with diameter between 35 and 47 cm. Variable pitches did not improve wood quality. Band saw with hook angle equal to 270 and gullet depth of 22 mm or 25.4 mm provided positive cut deviation. The smallest thickness variation was found for band saw with gullet depth equal 25.4 mm and hook angle equal to 270. The largest cut deviation was observed with variable pitch and hook angle of 260.