Avaliação da eficiência técnica de conversão de toros de pinus patulana serra portátil de disco

Abstract

The portable mostly disc saw is of a simple structure and its acquisition costs remain relatively low compared to other types of saw. Sawing logs using the portable saw is important as it reduces the costs of extracting and transporting raw materials in places of difficult access such as natural forests. The objective of the study is to evaluate the technical efficiency of converting pine patula logs into sawn wood in the lucas mill portable disc saw, in order to know the volumetric yield obtained and to propose measures for its increment and also to propose a test in other species. especially from natives. In the study, 40 logs of Pinus patula were randomly selected from the sawmill of the Machipanda forestry center (cefloma) and subjected to sawdust on the lucas mill to obtain sawn wood. The main parameters used in data processing to evaluate the conversion efficiency were: total volumetric yield, percentage of waste, yield by type of product and by quality class. - value per cubic meter of logs and lumber At the end of the study, it was observed that the average volumetric yield on the lucas mill saw was 51.6%. Yields by type of product with cutting schemes to maximize trusses were 73.7% for trusses, 23.4% for planks and 2.9% for slats. The yield of sawn wood of the 1st quality class was 83.3%, while that of the 2nd class was 16.7%. The study recommended the use of lucas mill for presenting an acceptable volumetric yield. The lucas mill test is also recommended for other native species. It is also recommended to review the lucas mill saw maintenance in accordance with the saw recommendations in order to produce parts without large depressions along its dimensions due to vibration