SURFACE ROUGHNESS OF HEAT TREATED Eucalyptus grandis WOOD

Gilmara  Pires de Moura Palermo; João Vicente  de Figueiredo Latorraca; Luiz Fernando  de Moura; Adriana Maria  Nolasco; Alexandre  Monteiro de Carvalho; Rosilei Aparecida  Garcia

SURFACE ROUGHNESS OF HEAT TREATED Eucalyptus grandis WOOD

Autores

Gilmara Pires de Moura Palermo

João Vicente de Figueiredo Latorraca

Luiz Fernando de Moura

Adriana Maria Nolasco

Alexandre Monteiro de Carvalho

Rosilei Aparecida Garcia

Editor

Universidad del Bío Bío

Descripción

This study aimed to evaluate surface roughness of heat treated Eucalyptus grandis wood after peripheral planning and sanding performed in directions to the grain and against the grain. For machining tests, workpieces were collected from two different regions in the radial direction, as follows: internal, nearby the pit; external, nearby the bark. Heat treatment was carried out by heating samples at a maximum temperature of 190ºC, with total treatment duration of 390 minutes. Heat treated and control samples underwent peripheral planning and sanding tests. The quality of machined surfaces was assessed by means of roughness average (Ra) measurements across and along the grain orientation. Results indicated significant differences in surface roughness as a function of machining feed direction, sandpaper grit size, and heat treatment. Surface roughness has not shown any difference in the radial direction.