| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder bore machining method capable of obtaining a cylinder bore having a good quality in high efficiency of production, even if the cylinder bore has comparatively low rigidity.SOLUTION: A machining device 20 is provided which includes an inner wall machining tool 21 for machining a cylinder bore 14 formed with an inner wall of a cast cylindrical shape, a rotating means 22, a moving means 23 and guide means 24. The inner wall machining tool 21 is constituted of a cylindrical shape body 31, a cavity crushing unit 32 for crushing the cavity of the inner wall by a plurality of rolling balls rollably disposed on the circumference of a tip end side of the body 31, an irregularity forming unit 33 disposed between the tip end side and the base end side of the body and for forming irregularities on the inner wall machined by the cavity crushing unit 32. The method includes an inner wall machining step of machining the inner wall by rotating the inner wall machining tool 21 with the rotating means 22 and also by moving the tool in the cylinder bore 14 with the moving means 23. |
