APPARATUS AND METHOD FOR CUTTING OR SLOTTING RIGID MATERIAL, IN PARTICULAR WOOD

摘要

An apparatus and a method serve for cutting elongate pieces of wood having a modulus of elasticity between 50,000 and 400,000 kg/cm2. A circular saw blade is provided having a plurality of spaced peripheral teeth. The saw blade is rotated about an axis at a cutting speed exceeding 40 m/s. The pieces of wood are displaced relative to the saw blade along a feeding direction extending perpendicular to the saw blade axis of rotation. A stationary bending element is arranged on a broad side of the saw blade adjoining the cutting teeth. The bending element has a radially profiled surface with at thickness increasing towards the axis and decreasing towards the cutting teeth. The saw blade can be used to cut a slot into the pieces of wood along the feeding direction, thus generating a first and a second section of the pieces of wood. The bending element ensures that the first section is lifted from the saw blade immediately after the formation of the slot. A deflection element is arranged at a first distance from the bending element downstream along the feeding direction. The deflection element exerts a first force on a first surface of the first section facing away from the bending element. A supporting element is arranged at a second distance from the bending element downstream along the feeding direction with the second distance being smaller than the first distance. The supporting element exerts a second force on a second surface of the first section facing the bending element.