Sliding member and manufacturing method thereof
AssigneeTaiho Kogyo Co., Ltd.
InventorsSatoshi Nomura, Masaharu Hatta, Hiroshi Kanemitsu
Life of this patent
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Abstract
A hemispherical shoe (sliding member) 1 has a flat sliding surface 3, which is quenched to form a quenched portion 7. A part of the quenched sliding surface is partially annealed to form an annealed portion 6. When an oil film pressure acts on the sliding surface 1, the annealed portion 6 is deformed by pressure so that the surface thereof has a concave portion 6A. In the annealed portion 6, a remaining quenched portion 8 may remain at the center part thereof. The concave portion 6A can be used as an oil reservoir or an oil flow path, so that an excellent seizure resistance can be ensured.
Claims14
A sliding member having a sliding surface slidable relative to a counterpart material, wherein at least the sliding surface of the sliding member is quenched so that a quenched portion is formed, a part of the quenched portion is partially annealed so that an annealed portion is formed, and the annealed portion is deformed by pressure to have a concave surface therein when an oil film pressure acts on the sliding surface.
A method for manufacturing a sliding member having a sliding surface that slides relative to a counterpart material, comprising the steps of:
- quenching all of the sliding surface of the sliding member to form a quenched sliding surface;
- annealing a portion of the quenched sliding surface to form an annealed portion of the sliding surface;
- and
- flattening the sliding surface after the annealing step.
Dependencies are inferred from the claim text.