METHOD OF PRODUCING EDGE-SURFACE LUMBER FROM PLANK TIMBER OF LARGE AND VERY LARGE DIMENSIONS Russian patent published in 2016 - IPC B27B1/00 

FIELD: wood working industry.

SUBSTANCE: invention relates to production of sawn items from plank timber. Logs of diameter from 40 to 60 cm at top ends are sawn into two two-edged beams, and from unedged segments two three-edged half-beams are obtained, wherein thickness of two-edged beams and thickness of three-edged half-beams are equal to one fourth part of log top end diameter. Working range of two-edge beams thickness change and of three-edged half-beams thickness change when calculating and arranging mills is chosen within 0.2-0.3 of log top end diameter. Logs with top end diameter of 60 cm and more, are sawn into three two-edge beams, and from unedged segments three three-edged half-beams are obtained. At that, thickness of two-edged beams and thickness of three-edged half-beams are equal to 0.185 of log top end diameter. Working range of two-edge beams thickness change and three-edged half-beams thickness change is chosen within 0.16-0.21 of log top end diameter.

EFFECT: higher yield of edge-surface lumber from large- and great-dimension plank timber.

1 cl, 44 dwg, 6 tbl