Side-crowned carbide cutting blades and cutting devices

Details Side-crowned carbide cutting blades and cutting devices Side-crowned carbide cutting blades and cutting devices

B - Operations, Transporting

26

D

B26D 3/00 (2006.01) B23D 35/00 (2006.01) B26D 1/00 (2006.01) B26D 1/01 (2006.01) B26D 1/08 (2006.01) B26D 1/30 (2006.01)

Patent

CA 2135720

Blades with tungsten carbide cutting edges have a surface at a relief angle and a surface at a reverse angle at the periphery. A smooth crown is provided at the intersection of the surfaces. The crown will contact and be included within an overlap of a cooperating offset steel blade. The relief angle may be between about 1 and 3 degrees and the reverse angle about ~ to 1 degree. The crown may have a finish of about 2-6 micro-inches. The contact between the blades during operation provides a polishing or self-sharpening effect. The tungsten carbide blades are used in rotating shear wheel devices and scissor cutting devices to cut tire cord fabric.

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