| 摘要 |
A hemispherical shoe 4 is equipped with a sliding surface 4A which slides with a swash plate 3, and a hemispherical convex 4B. Hardening is performed by radiating a laser so that a lot of minute circles 6 may be drawn on the sliding surface 4A. Then, lapping is given to the sliding surface 4A 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 4A. 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 4A 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. |
