Long Cutting Knife
AssigneeKanefusa Kabushiki Kaisha
InventorHirokazu NODA
Life of this patent
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Abstract
A long cutting knife is used to cut wood along an outer surface of the wood to obtain a veneer. The long cutting knife includes a blade metal including a cutting edge at a tip end and a flank face adjacent a rear face. The long cutting knife further includes a base metal to which the rear face of the blade metal is joined. The base metal is a steel material or a quenched steel material. For the steel material of the base metal, the yield point before quenching is greater than or equal to 305 N/mm2, the yield point after quenching is greater than or equal to 390 N/mm2, and/or the carbon content is greater than or equal to 0.32%.
Claims16
A long cutting knife for cutting wood along an outer surface of the wood to obtain a veneer, the long cutting knife comprising:
- a blade metal including a rake face, a flank face, a cutting edge at an intersection of the rake face and the flank face, and a rear face on a side of the blade metal opposite the rake face;
- and
- a base metal joined to the rear face of the blade metal, wherein:
- the base metal is a quenched steel material, and
- a yield point of the steel material of the base metal before quenching is greater than or equal to 305 N/mm2 and less than a yield point blade metal.
A long cutting knife for cutting wood along an outer surface of the wood to obtain a veneer, the long cutting knife comprising:
- a blade metal including a rake face, a flank face, a cutting edge formed at an intersection of the rake face and the flank face, and a rear face on a side of the blade metal opposite the rake face;
- and
- a base metal joined to the rear face of the blade metal, wherein:
- the base metal is a quenched steel material, and
- a yield point of the quenched steel material of the base metal is greater than or equal to 390 N/mm2 and is less than a yield point of the blade metal.
(canceled)
A method for forming a long cutting knife for cutting wood along an outer surface of the wood to obtain a veneer, the method comprising:
- providing a blade metal having a cutting edge formed at an edge between a rake face and a flank face;
- attaching a rear face of the blade metal to a base metal, wherein the rear face of the blade metal is on a side of the blade metal opposite the rake face of the blade metal;
- and
- quenching the base metal.
Dependencies are inferred from the claim text.