Method and apparatus for producing lumber from a tree trunk

A method for producing lumber from a tree trunk (1), the method comprising:

• producing at least one machining surface (2) on the tree trunk (1) by removing a slab region, and
• during a feed movement in a feed direction (9), moving the tree trunk (1) toward at least two milling tools (5), which are feedable in along respective infeed axes (8), whereby two waney regions (3) adjacent to the machining surface (2) are milled out and at least one side product board (4) is profiled;
• separating the side product board (4) is separated from the tree trunk (1) by a saw cut;
• before the profiling of the at least one side product board, determining a cutting solution for the tree trunk (1), the cutting solution comprising a side product shape on the tree trunk (1);
• and
• in a first machining position, the tree trunk (1) is moved toward the milling tools and, during the profiling of the side product board (4), the tree trunk (1) is brought from the first machining position into a second machining position by rotating the tree trunk (1) around a rotation axis, which runs orthogonally to the feed direction;
• and
• the side product board (4) is profiled in accordance with the cutting solution by feeding in the two milling tools (5) along the respective infeed axes (8) during the profiling of the side product board.

An apparatus for producing lumber from a tree trunk (1), the apparatus comprising:

• a separating cutter which is configured to separate a slab from a tree trunk (1) and to produce at least one machining surface (2), and
• a conveyor configured to impart a feed movement to the tree trunk (1) along a feed direction (9), and
• at least two milling tools (5) arranged such that, during the feed movement, the tree trunk (1) is adapted to be moved toward the milling tools (5) and two waney regions adjacent to the machining surface are adapted to be milled out and longitudinal sides of a side product board (4) are thereby profiled, and
• a saw that is adapted to separate the side product board (4) from the tree trunk (1),
• wherein the conveyor is adapted to adjust the tree trunk (1) around and/or along at least one adjustment axis, which runs orthogonally to the feed direction, and such that at least one leading region of the tree trunk is adapted to be shifted transversely to the feed direction.