Finger joint cutter

Details Finger joint cutter Finger joint cutter

B - Operations, Transporting

27

G

B27G 13/14 (2006.01) B23P 15/28 (2006.01) B27F 1/16 (2006.01)

Patent

CA 2456953

Cutting portion regions 16 of replaceable blades 15 that extrude outward in a radial direction at a plurality of portions in a peripheral direction of an outer periphery of a body 11 of a finger joint cutter are arranged in that, as for a cutting portion material that comprises cutting edge, tip end cutting portions 16a are formed of a steel material of high hardness and base portion side cutting portions 16b, which are the remaining portions, are formed of a steel material that exhibits a higher toughness than that of the tip end cutting portions. It is possible to improve the wear resistance through the tip end cutting portions and to improve the chipping resistance by the base portion side cutting portions. The steel material of high hardness comprising the tip end cutting portions and the steel material of high toughness comprising the base portion side cutting portions are successively joined through forge welding.

L'invention concerne un couteau à doigts qui comprend une lame de rechange (15) saillant d'un corps (11) dans le sens radial extérieur, à plusieurs emplacements de la périphérie extérieure dudit corps. Cette lame de rechange présente, dans la zone de coupe (16), une partie pointe de la lame (16a) fabriquée dans un matériau en acier très dur formant des éléments de la lame munis de crêtes à bord coupant. La partie base latérale de la lame (16b), ainsi que les autres parties, sont fabriquées dans un matériau en acier plus résistant que celui de la partie pointe de la lame. Le matériau en acier très dur utilisé pour fabriquer la partie pointe et le matériau en acier plus résistant utilisé pour fabriquer la partie base latérale de la lame sont assemblés solidairement par soudage à la forge, ce qui augmente la résistance à l'usure pour la partie pointe de la lame et la résistance à l'écaillage pour la partie base latérale de la lame.

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