Woodworking – Process – Mechanical cutting or shaping
Patent
1991-11-04
1992-09-15
Bray, W. Donald
Woodworking
Process
Mechanical cutting or shaping
831021, 83105, 83676, 144369, B27G 1908, B26D 708, B27B 100, B27B 528
Patent
active
051469642
ABSTRACT:
An apparatus and a method serve for cutting elongate pieces of wood having a modulus of elasticity between 50,000 and 400,000 kg/cm.sup.2. 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.
REFERENCES:
patent: 4503892 (1985-03-01), Gonner
patent: 4589458 (1986-05-01), Traben
patent: 4896708 (1990-01-01), Dietz
patent: 5052452 (1991-10-01), Goenner
Bray W. Donald
Wurster u. Dietz GmbH u. Co.
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