| 摘要 |
A hemispherical shoe 4 is equipped with a sliding surface 4 A which slides with a swash plate 3 , and a hemispherical convex 4 B. Hardening is performed by radiating a laser so that a lot of minute circles 6 may be drawn on the sliding surface 4 A. Then, lapping is given to the sliding surface 4 A and, finally buffing is given. Thereby, the lot of annular swelling portions 7 ' and concavities 8' are formed in positions of the circles 6 , and further, lubricating oil passages 10' which include net-like concavities are formed in the sliding surface 4 A. A hardening part is formed of the lot of above-mentioned annular swelling portions 7' . The above-mentioned annular swelling portions 7' are formed so that a ratio of an area of a total of all the above-described annular swelling portions 7' occupies in an area of the sliding surface 4 A which is a hardening object domain may become 0.3 to 0.8. It is possible to provide the shoe 4 which is good in seize resistance in comparison with the past.
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