Method for making mechanically joinable floorboards

摘要

In a method for making floorboards with a locking system for mechanical joining of two adjoining floorboards, wherein the floorboards, by chip-removing working, are formed with a locking system, which for horizontal joining of two edges of two floorboards at a vertical joint plane (F), comprises on the one hand a locking groove (14) formed in the underside (3) of one of said boards and, on the other hand, a strip (6) formed integrally in one piece with the body of the other of said boards (1) and supporting a locking element (8) having a locking surface for coaction with said locking groove (14), and for vertical joining of said edges of said two floorboards, comprises on the one hand a tongue (38) and, on the other hand, a tongue groove (36) intended for coaction with said tongue (38), said floorboards having cooperating upper and cooperating lower contact surfaces (43,45) which are plane-parallel and extend parallel with the upper side of said floorboards, of which the upper contact surfaces (43) comprise surface portions in said tongue groove (36) and said tongue (38), in which method the chip-removing working is carried out by chip-removing milling or grinding tools being brought into chip-removing contact with parts of said edges (4a) of the floorboards for forming said locking groove (14), said strip (6), said locking element (8), said tongue (38), said tongue groove (36) and said upper and lower contact surfaces (43,45), it is foreseen that parts of said tongue groove (36) and parts of the lower contact surface (45) are formed by means of a chip-removing tool (V1), whose chip-removing surface portions are brought into removing contact with the board edge (4a) and are directed obliquely inwards and past said joint plane (F) and that the upper contact surface (43) and parts of the tongue groove (36) are formed by means of a chip-removing tool (V2), whose chip-removing surface portions are brought into removing engagement with the board edge (4a) in a plane parallel with the upper side of the floorboard (1).