Sintered material, sizing device, and method for manufacturing sintered material
AssigneeSumitomo Electric Sintered Alloy, Ltd.
InventorsJunpei HARA, Seiji SAKAMOTO
Life of this patent
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Abstract
A cylindrical sintered material made of metal, in which one of an inner peripheral surface and an outer peripheral surface of the sintered material includes: a plurality of helical teeth arranged in parallel along a circumferential direction of the sintered material; and a sizing mark provided on at least a part of a tooth bottom surface, a tooth surface, and a tooth tip surface of each of the helical teeth, the helical tooth has a tooth profile error less than or equal to 6 μm, and the helical tooth has a tooth trace error less than or equal to 27 μm.
Claims7
A method for manufacturing a sintered material, the method comprising:
- preparing the sintered material including a plurality of helical teeth;
- disposing the sintered material in a cavity formed by a die having a through-hole and a first punch disposed in the through-hole;
- and
- pressing the sintered material in the cavity by the first punch and a second punch disposed opposite to the first punch to correct a dimension of the sintered material,
- wherein the first punch is rotatably supported by a thrust bearing,
- one of an inner peripheral surface of the through-hole of the die and an outer peripheral surface of the first punch includes a plurality of first helical tooth that meshes with the plurality of helical tooth of the sintered material, and
- in the correcting the dimension of the sintered material, the first punch is abutted and stopped at a predetermined position in a retreating direction of the first punch.
Dependencies are inferred from the claim text.