| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a component fitting structure to a substrate, in which a channel for circulating fluid and a fitting hole communicating to the channel are provided on a cast metal substrate, a flange part provided on a component to be fitted to the substrate is sandwiched between a ring-shaped step part formed in an inner peripheral wall of the fitting hole and facing to outside and a plastic deformation part formed by performing plastic flow of the inner peripheral wall of the fitting hole at outside of the step part in a fluid-tight state, contact surface pressure between the flange part and the step part of the substrate becomes high, and even there is a blowhole in the vicinity of the plastic deformation part, sufficient seal property can be secured.SOLUTION: A local surface pressure part 44A for causing linear contact in a ring-shape of a step part 46A and a flange part 21A along a peripheral direction of a fitting hole 12A is formed between the step part 46A and the flange part 21A.</p> |
