Mytischi, Moscow, Russian Federation
employee
employee
The presented research is devoted to the definition of the fragmentation of the sorting of lumber and the boundaries of sorting groups according to the value of the volume output of the primary harvesting, based on the calculation method for determining the volume output of harvesting for the furniture board. The article provides a brief overview of research on the evaluation of timber quality. The scheme for assessing the quality of lumber wood is given. The volumetric output and output parameters of cut modeling of the 1st and 2nd quality groups of sawn timber for blanks for the production of the furniture board of A grade are presented. The technique for determining the boundaries of sorting groups using the volumetric output of the main billet based on the calculated method for determining the volume yield of blanks for a furniture board. Visual sorting on the main work piece increases the volume output of solid blanks of the 1st quality group by 8.61% and the volume output of short blanks of the 2nd quality group by 8.54% compared to the calculated method. Sorting sawn timber according to the proposed indicator simplifies this process, and also allows achieving a functional dependence approximate to 1 between the quality of sawn timber and the quality of blanks, except for errors of quality controllers or operators that perform sorting.
saw timber, visual sorting, blank, sorting group, edge glued panel, quality assessment, volume output, calculation method.
Современные производства древесных плит потребителям поставляют продукцию, однородную по качеству. Лесопильно-деревообрабатывающие предприятия поставляют пиломатериалы потребителю с большим диапазоном изменения качества (например, пиломатериалы отборного, 1 и 2 сорта поставляются одной партией), что приводит к образованию дополнительных отходов при производстве заготовок. Такие отходы в большинстве случаев по качеству полностью устранить невозможно, т. к. в пиломатериалах почти всегда присутствуют пороки (основными из которых являются сучки), поэтому можно лишь добиться уменьшения отходов правильной подборкой групп пиломатериалов для раскроя на требуемые типоразмеры заготовок.
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